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  1. Article: Charge symmetry breaking in np-->dpi(0).

    Opper, A K / Korkmaz, E / Hutcheon, D A / Abegg, R / Davis, C A / Finlay, R W / Green, P W / Greeniaus, L G / Jordan, D V / Niskanen, J A / O'Rielly, G V / Porcelli, T A / Reitzner, S D / Walden, P L / Yen, S

    Physical review letters

    2003  Volume 91, Issue 21, Page(s) 212302

    Abstract: The forward-backward asymmetry in np-->dpi(0), which must be zero in the center-of-mass system if charge symmetry is respected, has been measured to be [17.2+/-8.0(stat)+/-5.5(syst)]x10(-4), at an incident neutron energy of 279.5 MeV. This observable is ... ...

    Abstract The forward-backward asymmetry in np-->dpi(0), which must be zero in the center-of-mass system if charge symmetry is respected, has been measured to be [17.2+/-8.0(stat)+/-5.5(syst)]x10(-4), at an incident neutron energy of 279.5 MeV. This observable is compared to recent chiral effective field theory calculations, with implications regarding the du quark mass difference.
    Language English
    Publishing date 2003-11-21
    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.91.212302
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Measurement of the resonant d(mu)t molecular formation rate in solid HD.

    Porcelli, T A / Adamczak, A / Bailey, J M / Beer, G A / Douglas, J L / Faifman, M P / Fujiwara, M C / Huber, T M / Kammel, P / Kim, S K / Knowles, P E / Kunselman, A R / Maier, M / Markushin, V E / Marshall, G M / Mason, G R / Mulhauser, F / Olin, A / Petitjean, C /
    Zmeskal, J

    Physical review letters

    2001  Volume 86, Issue 17, Page(s) 3763–3766

    Abstract: Measurements of muon-catalyzed dt fusion ( d(mu)t-->4He + n + mu(-)) in solid HD have been performed. The theory describing the energy dependent resonant molecular formation rate for the reaction (mu)t + HD-->[(d(mu)t)pee](*) is compared to experimental ... ...

    Abstract Measurements of muon-catalyzed dt fusion ( d(mu)t-->4He + n + mu(-)) in solid HD have been performed. The theory describing the energy dependent resonant molecular formation rate for the reaction (mu)t + HD-->[(d(mu)t)pee](*) is compared to experimental results in a pure solid HD target. Constraints on the rates are inferred through the use of a Monte Carlo model developed specifically for the experiment. From the time-of-flight analysis of fusion events in 16 and 37 microg x cm(-2) targets, an average formation rate consistent with 0.897+/-(0.046)(stat)+/-(0.166)(syst) times the theoretical prediction was obtained.
    Language English
    Publishing date 2001-04-23
    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.86.3763
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Measurement of the Michel parameter rho in muon decay.

    Musser, J R / Bayes, R / Davydov, Yu I / Depommier, P / Doornbos, J / Faszer, W / Gagliardi, C A / Gaponenko, A / Gill, D R / Green, P / Gumplinger, P / Hasinoff, M D / Henderson, R S / Hu, J / Jamieson, B / Kitching, P / Koetke, D D / Krushinsky, A A / Lachin, Yu Yu /
    Macdonald, J A / MacDonald, R P / Marshall, G M / Mathie, E L / Miasoedov, L V / Mischke, R E / Nord, P M / Olchanski, K / Olin, A / Openshaw, R / Porcelli, T A / Poutissou, J-M / Poutissou, R / Quraan, M A / Rodning, N L / Selivanov, V / Sheffer, G / Shin, B / Sobratee, F / Stanislaus, T D S / Tacik, R / Torokhov, V D / Tribble, R E / Vasiliev, M A / Wright, D H

    Physical review letters

    2005  Volume 94, Issue 10, Page(s) 101805

    Abstract: The TWIST Collaboration has measured the Michel parameter rho in normal muon decay, mu(+)--> e(+)nu(e)nu (mu). In the standard model, rho = 3/4. Deviations from this value imply mixing of left- and right-handed muon and electron couplings. We find rho=0 ... ...

    Abstract The TWIST Collaboration has measured the Michel parameter rho in normal muon decay, mu(+)--> e(+)nu(e)nu (mu). In the standard model, rho = 3/4. Deviations from this value imply mixing of left- and right-handed muon and electron couplings. We find rho=0.750 80+/-0.000 32(stat) +/- 0.000 97(syst) +/- 0.000 23, where the last uncertainty represents the dependence of rho on the Michel parameter eta. This result sets new limits on the W(L)-W(R) mixing angle in left-right symmetric models.
    Language English
    Publishing date 2005-03-18
    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.94.101805
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Transverse beam spin asymmetries in forward-angle elastic electron-proton scattering.

    Armstrong, D S / Arvieux, J / Asaturyan, R / Averett, T / Bailey, S L / Batigne, G / Beck, D H / Beise, E J / Benesch, J / Bimbot, L / Birchall, J / Biselli, A / Bosted, P / Boukobza, E / Breuer, H / Carlini, R / Carr, R / Chant, N / Chao, Y-C /
    Chattopadhyay, S / Clark, R / Covrig, S / Cowley, A / Dale, D / Davis, C / Falk, W / Finn, J M / Forest, T / Franklin, G / Furget, C / Gaskell, D / Grames, J / Griffioen, K A / Grimm, K / Guillon, B / Guler, H / Hannelius, L / Hasty, R / Allen, A Hawthorne / Horn, T / Johnston, K / Jones, M / Kammel, P / Kazimi, R / King, P M / Kolarkar, A / Korkmaz, E / Korsch, W / Kox, S / Kuhn, J / Lachniet, J / Lee, L / Lenoble, J / Liatard, E / Liu, J / Loupias, B / Lung, A / Marchand, D / Martin, J W / McFarlane, K W / McKee, D W / McKeown, R D / Merchez, F / Mkrtchyan, H / Moffit, B / Morlet, M / Nakagawa, I / Nakahara, K / Neveling, R / Ong, S / Page, S / Papavassiliou, V / Pate, S F / Phillips, S K / Pitt, M L / Poelker, M / Porcelli, T A / Quéméner, G / Quinn, B / Ramsay, W D / Rauf, A W / Real, J-S / Roche, J / Roos, P / Rutledge, G A / Secrest, J / Simicevic, N / Smith, G R / Spayde, D T / Stepanyan, S / Stutzman, M / Sulkosky, V / Tadevosyan, V / Tieulent, R / Van de Wiele, J / van Oers, W T H / Voutier, E / Vulcan, W / Warren, G / Wells, S P / Williamson, S E / Wood, S A / Yan, C / Yun, J / Zeps, V

    Physical review letters

    2007  Volume 99, Issue 9, Page(s) 92301

    Abstract: We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon ... ...

    Abstract We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. A(n) provides a direct probe of the imaginary component of the 2gamma exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.
    Language English
    Publishing date 2007-08-31
    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.99.092301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment.

    Armstrong, D S / Arvieux, J / Asaturyan, R / Averett, T / Bailey, S L / Batigne, G / Beck, D H / Beise, E J / Benesch, J / Bimbot, L / Birchall, J / Biselli, A / Bosted, P / Boukobza, E / Breuer, H / Carlini, R / Carr, R / Chant, N / Chao, Y-C /
    Chattopadhyay, S / Clark, R / Covrig, S / Cowley, A / Dale, D / Davis, C / Falk, W / Finn, J M / Forest, T / Franklin, G / Furget, C / Gaskell, D / Grames, J / Griffioen, K A / Grimm, K / Guillon, B / Guler, H / Hannelius, L / Hasty, R / Hawthorne Allen, A / Horn, T / Johnston, K / Jones, M / Kammel, P / Kazimi, R / King, P M / Kolarkar, A / Korkmaz, E / Korsch, W / Kox, S / Kuhn, J / Lachniet, J / Lee, L / Lenoble, J / Liatard, E / Liu, J / Loupias, B / Lung, A / MacLachlan, G A / Marchand, D / Martin, J W / McFarlane, K W / McKee, D W / McKeown, R D / Merchez, F / Mkrtchyan, H / Moffit, B / Morlet, M / Nakagawa, I / Nakahara, K / Nakos, M / Neveling, R / Niccolai, S / Ong, S / Page, S / Papavassiliou, V / Pate, S F / Phillips, S K / Pitt, M L / Poelker, M / Porcelli, T A / Quéméner, G / Quinn, B / Ramsay, W D / Rauf, A W / Real, J-S / Roche, J / Roos, P / Rutledge, G A / Secrest, J / Simicevic, N / Smith, G R / Spayde, D T / Stepanyan, S / Stutzman, M / Sulkosky, V / Tadevosyan, V / Tieulent, R / van de Wiele, J / van Oers, W / Voutier, E / Vulcan, W / Warren, G / Wells, S P / Williamson, S E / Wood, S A / Yan, C / Yun, J / Zeps, V

    Physical review letters

    2005  Volume 95, Issue 9, Page(s) 92001

    Abstract: We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are ... ...

    Abstract We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate nonzero, Q2 dependent, strange-quark contributions and provide new information beyond that obtained in previous experiments.
    Language English
    Publishing date 2005-08-26
    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.95.092001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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