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  1. Article: Bayesian analysis of pentaquark signals from CLAS data.

    Ireland, D G / McKinnon, B / Protopopescu, D / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Batourine, V / Battaglieri, M / Bedlinskiy, I / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Blaszczyk, L /
    Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Casey, L / Chen, S / Cheng, L / Cole, P L / Collins, P / Coltharp, P / Crabb, D / Crede, V / Dashyan, N / De Masi, R / De Vita, R / De Sanctis, E / Degtyarenko, P V / Deur, A / Dickson, R / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dzyubak, O P / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Eugenio, P / Fedotov, G / Feldman, G / Fradi, A / Funsten, H / Garçon, M / Gavalian, G / Gevorgyan, N / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J T / Gohn, W / Gonenc, A / Gothe, R W / Griffioen, K A / Guidal, M / Guler, N / Guo, L / Gyurjyan, V / Hafidi, K / Hakobyan, H / Hanretty, C / Hassall, N / Hersman, F W / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ishkhanov, B S / Isupov, E L / Jenkins, D / Jo, H S / Johnstone, J R / Joo, K / Juengst, H G / Kalantarians, N / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Kossov, M / Krahn, Z / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuleshov, S V / Kuznetsov, V / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Livingston, K / Lu, H Y / Maccormick, M / Markov, N / Mattione, P / Mecking, B A / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Mirazita, M / Miskimen, R / Mokeev, V / Moreno, B / Moriya, K / Morrow, S A / Moteabbed, M / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Pereira, S Anefalos / Pierce, J / Pivnyuk, N / Pogorelko, O / Pozdniakov, S / Price, J W / Procureur, S / Prok, Y / Raue, B A / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Sabatié, F / Salamanca, J / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shvedunov, N V / Smith, L C / Sober, D I / Sokhan, D / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Stoler, P / Strauch, S / Taiuti, M / Tedeschi, D J / Tkabladze, A / Tkachenko, S / Tur, C / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2008  Volume 100, Issue 5, Page(s) 52001

    Abstract: We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Theta(+) pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same ... ...

    Abstract We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Theta(+) pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a Theta(+). Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.
    Language English
    Publishing date 2008-02-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.100.052001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Measurement of deeply virtual compton scattering beam-spin asymmetries.

    Girod, F X / Niyazov, R A / Avakian, H / Ball, J / Bedlinskiy, I / Burkert, V D / De Masi, R / Elouadrhiri, L / Garçon, M / Guidal, M / Jo, H S / Joo, K / Kubarovsky, V / Kuleshov, S V / MacCormick, M / Niccolai, S / Pogorelko, O / Sabatié, F / Stepanyan, S /
    Stoler, P / Ungaro, M / Zhao, B / Amaryan, M J / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Batourine, V / Battaglieri, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Blaszczyk, L / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Casey, L / Chen, S / Cheng, L / Cole, P L / Collins, P / Coltharp, P / Crabb, D / Crede, V / Dashyan, N / De Sanctis, E / De Vita, R / Degtyarenko, P V / Deur, A / Dharmawardane, K V / Dickson, R / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Eugenio, P / Fedotov, G / Feldman, G / Funsten, H / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Goetz, J T / Gonenc, A / Gothe, R W / Griffioen, K A / Guler, N / Guo, L / Gyurjyan, V / Hafidi, K / Hakobyan, H / Hanretty, C / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Johnstone, J R / Juengst, H G / Kalantarians, N / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Krahn, Z / Kramer, L H / Kuhn, J / Kuhn, S E / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Lee, T / Livingston, K / Lu, H Y / Markov, N / Mattione, P / Mazouz, M / McKinnon, B / Mecking, B A / Mestayer, M D / Meyer, C A / Mibe, T / Michel, B / Mikhailov, K / Mirazita, M / Miskimen, R / Mokeev, V / Moriya, K / Morrow, S A / Moteabbed, M / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nasseripour, R / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Nozar, M / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Anefalos Pereira, S / Pierce, J / Pivnyuk, N / Pocanic, D / Pozdniakov, S / Price, J W / Procureur, S / Prok, Y / Protopopescu, D / Raue, B A / Ricco, G / Ripani, M / Ritchie, B G / Rosner, G / Rossi, P / Salamanca, J / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shvedunov, N V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Stavinsky, A / Stepanyan, S S / Stokes, B E / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Tkabladze, A / Tkachenko, S / Tur, C / Vineyard, M F / Vlassov, A V / Voutier, E / Watts, D P / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, Z W

    Physical review letters

    2008  Volume 100, Issue 16, Page(s) 162002

    Abstract: The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e p-->epgamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler ... ...

    Abstract The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e p-->epgamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q2 from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A approximately a sinphi/(1+c cosphi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.
    Language English
    Publishing date 2008-04-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.100.162002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Experimental study of exclusive 2H(e,e'p)n reaction mechanisms at high Q2.

    Egiyan, K S / Asryan, G / Gevorgyan, N / Griffioen, K A / Laget, J M / Kuhn, S E / Adams, G / Amaryan, M J / Ambrozewicz, P / Anghinolfi, M / Audit, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Barrow, S / Batourine, V / Battaglieri, M /
    Bedlinskiy, I / Bektasoglu, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Blaszczyk, L / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Cazes, A / Chen, S / Cole, P L / Collins, P / Coltharp, P / Cords, D / Corvisiero, P / Crabb, D / Crede, V / Cummings, J P / Dashyan, N / De Masi, R / De Vita, R / De Sanctis, E / Degtyarenko, P V / Denizli, H / Dennis, L / Deur, A / Dharmawardane, K V / Dickson, R / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dytman, S / Dzyubak, O P / Egiyan, H / El Fassi, L / Elouadrhiri, L / Eugenio, P / Fatemi, R / Fedotov, G / Feldman, G / Feuerbach, R J / Fersch, R / Garçon, M / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J T / Gonenc, A / Gordon, C I O / Gothe, R W / Guidal, M / Guillo, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hakobyan, R S / Hanretty, C / Hardie, J / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Joo, K / Juengst, H G / Kalantarians, N / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Krahn, Z / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuleshov, S V / Lachniet, J / Langheinrich, J / Lawrence, D / Li, Ji / Livingston, K / Lu, H Y / Maccormick, M / Marchand, C / Markov, N / Mattione, P / McAleer, S / McKinnon, B / McNabb, J W C / Mecking, B A / Mehrabyan, S / Melone, J J / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Minehart, R / Mirazita, M / Miskimen, R / Mokeev, V / Moriya, K / Morrow, S A / Moteabbed, M / Mueller, J / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / O'Rielly, G V / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Anefalos Pereira, S / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Sabatié, F / Salamanca, J / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Shvedunov, N V / Skabelin, A V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Stoler, P / Strauch, S / Taiuti, M / Tedeschi, D J / Thoma, U / Tkabladze, A / Tkachenko, S / Todor, L / Tur, C / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2007  Volume 98, Issue 26, Page(s) 262502

    Abstract: The reaction 2H(e,e'p)n has been studied with full kinematic coverage for photon virtuality 1.75

    Abstract The reaction 2H(e,e'p)n has been studied with full kinematic coverage for photon virtuality 1.75<Q2<5.5 GeV2. Comparisons of experimental data with theory indicate that for very low values of neutron recoil momentum (p(n)<100 MeV/c) the neutron is primarily a spectator and the reaction can be described by the plane-wave impulse approximation. For 100<p(n)<750 MeV/c, proton-neutron rescattering dominates the cross section, while Delta production followed by the NDelta-->NN transition is the primary contribution at higher momenta.
    Language English
    Publishing date 2007-06-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.98.262502
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Search for medium modifications of the rho meson.

    Nasseripour, R / Wood, M H / Djalali, C / Weygand, D P / Tur, C / Mosel, U / Muehlich, P / Adams, G / Amaryan, M J / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Barrow, S / Battaglieri, M /
    Bedlinskiy, I / Bektasoglu, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Blaszczyk, L / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Carnahan, B / Casey, L / Chen, S / Cole, P L / Collins, P / Coltharp, P / Crabb, D / Crannell, H / Crede, V / Cummings, J P / Dashyan, N / De Masi, R / De Vita, R / De Sanctis, E / Degtyarenko, P V / Denizli, H / Dennis, L / Deur, A / Dharmawardane, K V / Dickson, R / Dodge, G E / Doughty, D / Dugger, M / Dytman, S / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Eugenio, P / Fedotov, G / Feldman, G / Feuerbach, R J / Funsten, H / Garçon, M / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J T / Gordon, C I O / Gothe, R W / Griffioen, K A / Guidal, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hakobyan, R S / Hanretty, C / Hardie, J / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Johnstone, J R / Joo, K / Juengst, H G / Kalantarians, N / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Krahn, Z / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Kuleshov, S V / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Li, Ji / Livingston, K / Lu, H Y / Maccormick, M / Markov, N / Mattione, P / McAleer, S / McKinnon, B / McNabb, J W C / Mecking, B A / Mehrabyan, S / Melone, J J / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Minehart, R / Mirazita, M / Miskimen, R / Mokeev, V / Moriya, K / Morrow, S A / Moteabbed, M / Mueller, J / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Anefalos Pereira, S / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Sabatié, F / Salamanca, J / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shvedunov, N V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Stoler, P / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Tkabladze, A / Tkachenko, S / Todor, L / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Weinstein, L B / Williams, M / Wolin, E / Yegneswaran, A / Zana, L / Zhang, B / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2007  Volume 99, Issue 26, Page(s) 262302

    Abstract: The photoproduction of vector mesons on various nuclei has been studied using the CLAS detector at Jefferson Laboratory. The vector mesons, rho, omega, and varphi, are observed via their decay to e;{+}e;{-}, in order to reduce the effects of final-state ... ...

    Abstract The photoproduction of vector mesons on various nuclei has been studied using the CLAS detector at Jefferson Laboratory. The vector mesons, rho, omega, and varphi, are observed via their decay to e;{+}e;{-}, in order to reduce the effects of final-state interactions in the nucleus. Of particular interest are possible in-medium effects on the properties of the rho meson. The rho mass spectrum is extracted from the data on various nuclei, 2H, C, Fe, and Ti. We observe no significant mass shift and some broadening consistent with expected collisional broadening for the rho meson.
    Language English
    Publishing date 2007-12-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.99.262302
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Precise measurement of the neutron magnetic form factor G(M)n in the few-GeV2 region.

    Lachniet, J / Afanasev, A / Arenhövel, H / Brooks, W K / Gilfoyle, G P / Higinbotham, D / Jeschonnek, S / Quinn, B / Vineyard, M F / Adams, G / Adhikari, K P / Amaryan, M J / Anghinolfi, M / Asavapibhop, B / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P /
    Baltzell, N A / Barrow, S / Batourine, V / Battaglieri, M / Beard, K / Bedlinskiy, I / Bektasoglu, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Bonner, B E / Bookwalter, C / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Bültmann, S / Burkert, V D / Calarco, J R / Careccia, S L / Carman, D S / Casey, L / Cheng, L / Cole, P L / Coleman, A / Collins, P / Cords, D / Corvisiero, P / Crabb, D / Crede, V / Cummings, J P / Dale, D / Daniel, A / Dashyan, N / De Masi, R / De Vita, R / De Sanctis, E / Degtyarenko, P V / Denizli, H / Dennis, L / Deur, A / Dhamija, S / Dharmawardane, K V / Dhuga, K S / Dickson, R / Djalali, C / Dodge, G E / Doughty, D / Dragovitsch, P / Dugger, M / Dytman, S / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Empl, A / Eugenio, P / Fatemi, R / Fedotov, G / Fersch, R / Feuerbach, R J / Forest, T A / Fradi, A / Gabrielyan, M Y / Garçon, M / Gavalian, G / Gevorgyan, N / Giovanetti, K L / Girod, F X / Goetz, J T / Gohn, W / Golovatch, E / Gothe, R W / Graham, L / Griffioen, K A / Guidal, M / Guillo, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hanretty, C / Hardie, J / Hassall, N / Heddle, D / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hu, J / Huertas, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Johnstone, J R / Joo, K / Juengst, H G / Kageya, T / Kalantarians, N / Keller, D / Kellie, J D / Khandaker, M / Khetarpal, P / Kim, K Y / Kim, K / Kim, W / Klein, A / Klein, F J / Klusman, M / Konczykowski, P / Kossov, M / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Kuleshov, S V / Kuznetsov, V / Laget, J M / Langheinrich, J / Lawrence, D / Lima, A C S / Livingston, K / Lowry, M / Lu, H Y / Lukashin, K / Maccormick, M / Malace, S / Manak, J J / Markov, N / Mattione, P / McAleer, S / McCracken, M E / McKinnon, B / McNabb, J W C / Mecking, B A / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Mineeva, T / Minehart, R / Mirazita, M / Miskimen, R / Mokeev, V / Moreno, B / Moriya, K / Morrow, S A / Moteabbed, M / Mueller, J / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / O'Rielly, G V / Osipenko, M / Ostrovidov, A I / Park, K / Park, S / Pasyuk, E / Paterson, C / Pereira, S Anefalos / Philips, S A / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Polli, E / Popa, I / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Qin, L M / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Rosner, G / Rossi, P / Rowntree, D / Rubin, P D / Sabatié, F / Saini, M S / Salamanca, J / Salgado, C / Sandorfi, A / Santoro, J P / Sapunenko, V / Schott, D / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shaw, J / Shvedunov, N V / Skabelin, A V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Starostin, A / Stavinsky, A / Stepanyan, S / Stepanyan, S S / Stokes, B E / Stoler, P / Stopani, K A / Strakovsky, I I / Strauch, S / Suleiman, R / Taiuti, M / Taylor, S / Tedeschi, D J / Thompson, R / Tkabladze, A / Tkachenko, S / Ungaro, M / Vlassov, A V / Watts, D P / Wei, X / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Yun, J / Yurov, M / Zana, L / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2009  Volume 102, Issue 19, Page(s) 192001

    Abstract: The neutron elastic magnetic form factor was extracted from quasielastic electron scattering on deuterium over the range Q;{2}=1.0-4.8 GeV2 with the CLAS detector at Jefferson Lab. High precision was achieved with a ratio technique and a simultaneous in ... ...

    Abstract The neutron elastic magnetic form factor was extracted from quasielastic electron scattering on deuterium over the range Q;{2}=1.0-4.8 GeV2 with the CLAS detector at Jefferson Lab. High precision was achieved with a ratio technique and a simultaneous in situ calibration of the neutron detection efficiency. Neutrons were detected with electromagnetic calorimeters and time-of-flight scintillators at two beam energies. The dipole parametrization gives a good description of the data.
    Language English
    Publishing date 2009-05-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.102.192001
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  6. Article: Measurement of direct f0(980) photoproduction on the proton.

    Battaglieri, M / De Vita, R / Szczepaniak, A P / Adhikari, K P / Aghasyan, M / Amaryan, M J / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Batourine, V / Bedlinskiy, I / Bellis, M / Benmouna, N / Berman, B L /
    Bibrzycki, L / Biselli, A S / Bookwalter, C / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Calarco, J R / Careccia, S L / Carman, D S / Casey, L / Chen, S / Cheng, L / Clinton, E / Cole, P L / Collins, P / Crabb, D / Crannell, H / Crede, V / Cummings, J P / Dale, D / Daniel, A / Dashyan, N / De Masi, R / De Sanctis, E / Degtyarenko, P V / Deur, A / Dhamija, S / Dharmawardane, K V / Dickson, R / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Eugenio, P / Fedotov, G / Fersch, R / Forest, T A / Fradi, A / Gabrielyan, M Y / Gan, L / Garçon, M / Gasparian, A / Gavalian, G / Gevorgyan, N / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Glamazdin, O / Goett, J / Goetz, J T / Gohn, W / Golovatch, E / Gordon, C I O / Gothe, R W / Graham, L / Griffioen, K A / Guidal, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hakobyan, R S / Hanretty, C / Hardie, J / Hassall, N / Heddle, D / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Johnstone, J R / Joo, K / Juengst, H G / Kageya, T / Kalantarians, N / Keller, D / Kellie, J D / Khandaker, M / Khetarpal, P / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Konczykowski, P / Kossov, M / Krahn, Z / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Kuleshov, S V / Kuznetsov, V / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Lee, T / Lesniak, L / Li, Ji / Livingston, K / Lowry, M / Lu, H Y / Maccormick, M / Malace, S / Markov, N / Mattione, P / McCracken, M E / McKinnon, B / Mecking, B A / Melone, J J / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Mineeva, T / Minehart, R / Mirazita, M / Miskimen, R / Mochalov, V / Mokeev, V / Moreno, B / Moriya, K / Morrow, S A / Moteabbed, M / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nakagawa, I / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / Osipenko, M / Ostrovidov, A I / Park, K / Park, S / Pasyuk, E / Paris, M / Paterson, C / Pereira, S Anefalos / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Pozdniakov, S / Price, J W / Prok, Y / Protopopescu, D / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Rosner, G / Rossi, P / Sabatié, F / Saini, M S / Salamanca, J / Salgado, C / Sandorfi, A / Santoro, J P / Sapunenko, V / Schott, D / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shvedunov, N V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Starostin, A / Stavinsky, A / Stepanyan, S / Stepanyan, S S / Stokes, B E / Stoler, P / Stopani, K A / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Teymurazyan, A / Tkabladze, A / Tkachenko, S / Todor, L / Tur, C / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Wei, X / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Yurov, M / Zana, L / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2009  Volume 102, Issue 10, Page(s) 102001

    Abstract: We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=3.0-3.8 GeV and -t=0.4-1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. ... ...

    Abstract We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=3.0-3.8 GeV and -t=0.4-1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the pi;{+}pi;{-} channel by performing a partial wave analysis of the reaction gammap-->ppi;{+}pi;{-}. Clear evidence of the f_{0}(980) meson was found in the interference between P and S waves at M_{pi;{+}pi;{-}} approximately 1 GeV. The S-wave differential cross section integrated in the mass range of the f_{0}(980) was found to be a factor of about 50 smaller than the cross section for the rho meson. This is the first time the f_{0}(980) meson has been measured in a photoproduction experiment.
    Language English
    Publishing date 2009-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.102.102001
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  7. Article: Search for the photoexcitation of exotic mesons in the pi+pi+pi- system.

    Nozar, M / Salgado, C / Weygand, D P / Guo, L / Adams, G / Li, Ji / Eugenio, P / Amaryan, M J / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Barrow, S / Battaglieri, M / Bedlinskiy, I / Bektasoglu, M /
    Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Blaszczyk, L / Bonner, B E / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Carnahan, B / Casey, L / Cazes, A / Chen, S / Cheng, L / Cole, P L / Collins, P / Coltharp, P / Cords, D / Corvisiero, P / Crabb, D / Crannell, H / Crede, V / Cummings, J P / Dale, D / Dashyan, N / De Masi, R / De Vita, R / De Sanctis, E / Degtyarenko, P V / Denizli, H / Dennis, L / Deur, A / Dharmawardane, K V / Dhuga, K S / Dickson, R / Djalali, C / Dodge, G E / Doughty, D / Dugger, M / Dytman, S / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Fatemi, R / Fedotov, G / Feuerbach, R J / Forest, T A / Fradi, A / Funsten, H / Garçon, M / Gavalian, G / Gevorgyan, N / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J T / Gothe, R W / Griffioen, K A / Guidal, M / Guillo, M / Guler, N / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hanretty, C / Hardie, J / Hassall, N / Heddle, D / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Johnstone, J R / Joo, K / Juengst, H G / Kalantarians, N / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Kossov, M / Krahn, Z / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Kuleshov, S V / Kuznetsov, V / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Livingston, K / Lu, H Y / Maccormick, M / Markov, N / Mattione, P / McAleer, S / McKinnon, B / McNabb, J W C / Mecking, B A / Mehrabyan, S / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Mirazita, M / Miskimen, R / Mokeev, V / Moreno, B / Moriya, K / Morrow, S A / Moteabbed, M / Mueller, J / Munevar, E / Mutchler, G S / Nadel-Turonski, P / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / O'Rielly, G V / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Anefalos Pereira, S / Philips, S A / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Polli, E / Popa, I / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Qin, L M / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Rubin, P D / Sabatié, F / Salamanca, J / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Sharov, D / Shvedunov, N V / Skabelin, A V / Smith, E S / Smith, L C / Sober, D I / Sokhan, D / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Stoler, P / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Thoma, U / Tkabladze, A / Tkachenko, S / Todor, L / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Weinstein, L B / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, B / Zhao, Z W

    Physical review letters

    2009  Volume 102, Issue 10, Page(s) 102002

    Abstract: A search for exotic mesons in the pi;{+}pi;{+}pi;{-} system photoproduced by the charge exchange reaction gammap-->pi;{+}pi;{+}pi;{-}(n) was carried out by the CLAS Collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV ... ...

    Abstract A search for exotic mesons in the pi;{+}pi;{+}pi;{-} system photoproduced by the charge exchange reaction gammap-->pi;{+}pi;{+}pi;{-}(n) was carried out by the CLAS Collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A partial wave analysis was performed on a sample of 83 000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic J;{PC}=1;{-+} resonant state in the 1 to 2 GeV mass range. Our partial wave analysis shows production of the a_{2}(1320) and the pi_{2}(1670) mesons, but no evidence for the a_{1}(1260), nor the pi_{1}(1600) exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic pi_{1}(1600) cross section, less than 2% of the a_{2}(1320) production.
    Language English
    Publishing date 2009-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.102.102002
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  8. Article: Measurement of the N-->Delta(+)(1232) transition at high-momentum transfer by pi(0) electroproduction.

    Ungaro, M / Stoler, P / Aznauryan, I / Burkert, V D / Joo, K / Smith, L C / Adams, G / Amarian, M / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Audit, G / Avakian, H / Bagdasaryan, H / Ball, J P / Baltzell, N A / Barrow, S / Batourine, V / Battaglieri, M /
    Bedliski, I / Bektasoglu, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Bonner, B E / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Cazes, A / Chen, S / Cole, P L / Coltharp, P / Cords, D / Corvisiero, P / Crabb, D / Cummings, J P / Sanctis, E De / Devita, R / Degtyarenko, P V / Denizli, H / Dennis, L / Deur, A / Dharmawardane, K V / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dytman, S / Dzyubak, O P / Egiyan, H / Egiyan, K S / Elouadrhiri, L / Eugenio, P / Fatemi, R / Fedotov, G / Feldman, G / Feuerbach, R J / Funsten, H / Garçon, M / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J / Gordon, C I O / Gothe, R W / Griffioen, K A / Guidal, M / Guillo, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hakobyan, R S / Hardie, J / Heddle, D / Hersman, F W / Hleiqawi, I / Holtrop, M / Hicks, K / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Ito, M M / Jenkins, D / Jo, H S / Juengst, H G / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Lee, T / Li, Ji / Livingston, K / Marchand, C / Markov, N / McAleer, S / McKinnon, B / McNabb, J W C / Mecking, B A / Mehrabyan, S / Melone, J J / Mestayer, M D / Meyer, C A / Mikhailov, K / Minehart, R / Mirazita, M / Miskimen, R / Mokeev, V / Morand, L / Morrow, S A / Mueller, J / Mutchler, G S / Napolitano, J / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M / Niyazov, R A / Nozar, M / O'rielly, G V / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Philips, S A / Pivnyuk, N / Pocanic, D / Pogorelko, O / Polli, E / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Qin, L M / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Rubin, P D / Sabatié, F / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Skabelin, A V / Smith, E S / Sober, D I / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Thoma, U / Tkabladze, A / Todor, L / Tkachenko, S / Tur, C / Vineyard, M F / Vlassov, A V / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, B / Zhang, J / Zhao, B

    Physical review letters

    2006  Volume 97, Issue 11, Page(s) 112003

    Abstract: We report a new measurement of the exclusive electroproduction reaction gamma(*)p-->pi(0)p to explore the evolution from soft nonperturbative physics to hard processes via the Q(2) dependence of the magnetic (M(1+)), electric (E(1+)), and scalar (S(1+)) ... ...

    Abstract We report a new measurement of the exclusive electroproduction reaction gamma(*)p-->pi(0)p to explore the evolution from soft nonperturbative physics to hard processes via the Q(2) dependence of the magnetic (M(1+)), electric (E(1+)), and scalar (S(1+)) multipoles in the N-->Delta transition. 9000 differential cross section data points cover W from threshold to 1.4 GeV/c(2), 4pi center-of-mass solid angle, and Q(2) from 3 to 6 GeV(2)/c(2), the highest yet achieved. It is found that the magnetic form factor G(M)(*) decreases with Q(2) more steeply than the proton magnetic form factor, the ratio E(1+)/M(1+) is small and negative, indicating strong helicity nonconservation, and the ratio S(1+)/M(1+) is negative, while its magnitude increases with Q(2).
    Language English
    Publishing date 2006-09-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.97.112003
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  9. Article: Search for Theta++ pentaquarks in the exclusive reaction gammap-->K+K-p.

    Kubarovsky, V / Battaglieri, M / De Vita, R / Goett, J / Guo, L / Mutchler, G S / Stoler, P / Weygand, D P / Ambrozewicz, P / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P / Baltzell, N A / Batourine, V / Bedlinskiy, I / Bellis, M /
    Benmouna, N / Berman, B L / Biselli, A S / Bouchigny, S / Boiarinov, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carman, D S / Chen, S / Clinton, E / Cole, P L / Collins, P / Coltharp, P / Crabb, D / Crannell, H / Crede, V / Cummings, J P / De Masi, R / Dale, D / De Sanctis, E / Degtyarenko, P V / Deur, A / Dharmawardane, K V / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dzyubak, O P / Egiyan, H / Egiyan, K S / Elouadrhiri, L / Eugenio, P / Fedotov, G / Funsten, H / Gabrielyan, M Y / Gan, L / Garçon, M / Gasparian, A / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Glamazdin, O / Goetz, J T / Golovach, E / Gonenc, A / Gordon, C I O / Gothe, R W / Griffioen, K A / Guidal, M / Guler, N / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, R S / Hardie, J / Hersman, F W / Hicks, K / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Joo, K / Juengst, H G / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Kramer, L H / Kuhn, J / Kuhn, S E / Kuleshov, S V / Lachniet, J / Laget, J M / Langheinrich, J / Lawrence, D / Lee, T / Li, Ji / Livingston, K / Lu, H / MacCormick, M / Markov, N / McKinnon, B / Mecking, B A / Melone, J J / Mestayer, M D / Meyer, C A / Mibe, T / Mikhailov, K / Minehart, R / Mirazita, M / Miskimen, R / Mochalov, V / Mokeev, V / Morand, L / Morrow, S A / Moteabbed, M / Nadel-Turonski, P / Nakagawa, I / Nasseripour, R / Niccolai, S / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Pozdniakov, S / Price, J W / Prok, Y / Protopopescu, D / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Rossi, P / Sabatié, F / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Shvedunov, N V / Smith, E S / Smith, L C / Sober, D I / Stavinsky, A / Stepanyan, S S / Stepanyan, S / Stokes, B E / Strakovsky, I I / Strauch, S / Taiuti, M / Tedeschi, D J / Teymurazyan, A / Thoma, U / Tkabladze, A / Tkachenko, S / Todor, L / Tur, C / Ungaro, M / Vineyard, M F / Vlassov, A V / Weinstein, L B / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, B

    Physical review letters

    2006  Volume 97, Issue 10, Page(s) 102001

    Abstract: The reaction gammap --> pK+K- was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Theta++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, ...

    Abstract The reaction gammap --> pK+K- was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Theta++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK+ invariant mass spectrum. No statistically significant evidence of a Theta++ was found. Upper limits on the total and differential cross section for the reaction gammap --> K-Theta++ were obtained in the mass range from 1.5 to 2.0 GeV/c2, with an upper limit for a narrow resonance with a mass M(Theta++) = 1.54 GeV/c2 of about 0.15 nb, 95% C.L.. This result places a stringent upper limit on the Theta++ width Gamma(Theta++) <0.1 MeV/c2.
    Language English
    Publishing date 2006-09-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.97.102001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Search for the Theta+ Pentaquark in the gammad--> DeltanK+ reaction measured with the CLAS spectrometer.

    Niccolai, S / Mirazita, M / Rossi, P / Baltzell, N A / Carman, D S / Hicks, K / McKinnon, B / Mibe, T / Stepanyan, S / Tedeschi, D J / Adams, G / Ambrozewicz, P / Anefalos Pereira, S / Anghinolfi, M / Asryan, G / Avakian, H / Bagdasaryan, H / Baillie, N / Ball, J P /
    Batourine, V / Battaglieri, M / Bedlinskiy, I / Bektasoglu, M / Bellis, M / Benmouna, N / Berman, B L / Biselli, A S / Boiarinov, S / Bouchigny, S / Bradford, R / Branford, D / Briscoe, W J / Brooks, W K / Bültmann, S / Burkert, V D / Butuceanu, C / Calarco, J R / Careccia, S L / Carnahan, B / Chen, S / Cole, P L / Collins, P / Coltharp, P / Crabb, D / Crannell, H / Crede, V / Cummings, J P / Dashyan, N / Degtyarenko, P V / De Masi, R / Deppman, A / De Sanctis, E / Deur, A / Devita, R / Dharmawardane, K V / Djalali, C / Dodge, G E / Donnelly, J / Doughty, D / Dugger, M / Dzyubak, O P / Egiyan, H / Egiyan, K S / El Fassi, L / Elouadrhiri, L / Eugenio, P / Fedotov, G / Feldman, G / Funsten, H / Garçon, M / Gavalian, G / Gilfoyle, G P / Giovanetti, K L / Girod, F X / Goetz, J T / Gonenc, A / Gordon, C I O / Gothe, R W / Griffioen, K A / Guidal, M / Guler, N / Guo, L / Gyurjyan, V / Hadjidakis, C / Hafidi, K / Hakobyan, H / Hakobyan, R S / Hardie, J / Hersman, F W / Hleiqawi, I / Holtrop, M / Hyde-Wright, C E / Ilieva, Y / Ireland, D G / Ishkhanov, B S / Isupov, E L / Ito, M M / Jenkins, D / Jo, H S / Joo, K / Juengst, H G / Kellie, J D / Khandaker, M / Kim, W / Klein, A / Klein, F J / Klimenko, A V / Kossov, M / Kramer, L H / Kubarovsky, V / Kuhn, J / Kuhn, S E / Kuleshov, S V / Lachniet, J / Langheinrich, J / Lawrence, D / Lee, T / Li, Ji / Livingston, K / Lu, H / MacCormick, M / Markov, N / Mecking, B A / Mellor, J / Melone, J J / Mestayer, M D / Meyer, C A / Mikhailov, K / Minehart, R / Miskimen, R / Mokeev, V / Morand, L / Morrow, S A / Moteabbed, M / Mutchler, G S / Nadel-Turonski, P / Napolitano, J / Nasseripour, R / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niroula, M R / Niyazov, R A / Nozar, M / de Oliveira Echeimberg, J / Osipenko, M / Ostrovidov, A I / Park, K / Pasyuk, E / Paterson, C / Pierce, J / Pivnyuk, N / Pocanic, D / Pogorelko, O / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Raue, B A / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Ronchetti, F / Rosner, G / Sabatié, F / Salgado, C / Santoro, J P / Sapunenko, V / Schumacher, R A / Serov, V S / Sharabian, Y G / Shvedunov, N V / Smith, E S / Smith, L C / Sober, D I / Stavinsky, A / Stepanyan, S S / Stokes, B E / Stoler, P / Strakovsky, I I / Strauch, S / Taiuti, M / Thoma, U / Tkabladze, A / Tkachenko, S / Todor, L / Tur, C / Ungaro, M / Vineyard, M F / Vlassov, A V / Watts, D P / Weinstein, L B / Weygand, D P / Williams, M / Wolin, E / Wood, M H / Yegneswaran, A / Zana, L / Zhang, J / Zhao, B / Zhao, Z

    Physical review letters

    2006  Volume 97, Issue 3, Page(s) 32001

    Abstract: For the first time, the reaction gammad-->DeltanK+ has been analyzed in order to search for the exotic pentaquark baryon Theta+(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and ... ...

    Abstract For the first time, the reaction gammad-->DeltanK+ has been analyzed in order to search for the exotic pentaquark baryon Theta+(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and the CEBAF Large Acceptance Spectrometer (CLAS). No statistically significant structures were observed in the nK+ invariant-mass distribution. The upper limit on the gammad-->DeltaTheta+ integrated cross section has been calculated and found to be between 5 and 25 nb, depending on the production model assumed. The upper limit on the differential cross section is also reported.
    Language English
    Publishing date 2006-07-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.97.032001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

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    Z 4' 58/153: Show issues

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    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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