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  1. Article ; Online: Search for η^{'} Bound Nuclei in the ^{12}C(γ,p) Reaction with Simultaneous Detection of Decay Products.

    Tomida, N / Muramatsu, N / Niiyama, M / Ahn, J K / Chang, W C / Chen, J Y / Chu, M L / Daté, S / Gogami, T / Goto, H / Hamano, H / Hashimoto, T / He, Q H / Hicks, K / Hiraiwa, T / Honda, Y / Hotta, T / Ikuno, H / Inoue, Y /
    Ishikawa, T / Jaegle, I / Jo, J M / Kasamatsu, Y / Katsuragawa, H / Kido, S / Kon, Y / Maruyama, T / Masumoto, S / Matsumura, Y / Miyabe, M / Mizutani, K / Nagahiro, H / Nakamura, T / Nakano, T / Nam, T / Ngan, T N T / Nozawa, Y / Ohashi, Y / Ohnishi, H / Ohta, T / Ozawa, K / Rangacharyulu, C / Ryu, S Y / Sada, Y / Sasagawa, M / Shibukawa, T / Shimizu, H / Shirai, R / Shiraishi, K / Strokovsky, E A / Sugaya, Y / Sumihama, M / Suzuki, S / Tanaka, S / Tokiyasu, A / Tsuchikawa, Y / Ueda, T / Yamazaki, H / Yamazaki, R / Yanai, Y / Yorita, T / Yoshida, C / Yosoi, M

    Physical review letters

    2020  Volume 124, Issue 20, Page(s) 202501

    Abstract: We measured missing mass spectrum of the ^{12}C(γ,p) reaction for the first time in coincidence with potential decay products from η^{'} bound nuclei. We tagged an (η+p) pair associated with the η^{'}N→ηN process in a nucleus. After applying kinematical ... ...

    Abstract We measured missing mass spectrum of the ^{12}C(γ,p) reaction for the first time in coincidence with potential decay products from η^{'} bound nuclei. We tagged an (η+p) pair associated with the η^{'}N→ηN process in a nucleus. After applying kinematical selections to reduce backgrounds, no signal events were observed in the bound-state region. An upper limit of the signal cross section in the opening angle cosθ_{lab}^{ηp}<-0.9 was obtained to be 2.2  nb/sr at the 90% confidence level. It is compared with theoretical cross sections, whose normalization ambiguity is suppressed by measuring a quasifree η^{'} production rate. Our results indicate a small branching fraction of the η^{'}N→ηN process and/or a shallow η^{'}-nucleus potential.
    Language English
    Publishing date 2020-06-01
    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.124.202501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Differential Cross Section and Photon-Beam Asymmetry for the γ[over →]p → π^{-}Δ^{++}(1232) Reaction at Forward π^{-} Angles for E_{γ}=1.5-2.95  GeV.

    Kohri, H / Shiu, S H / Chang, W C / Yanai, Y / Ahn, D S / Ahn, J K / Chen, J Y / Daté, S / Ejiri, H / Fujimura, H / Fujiwara, M / Fukui, S / Gohn, W / Hicks, K / Hosaka, A / Hotta, T / Hwang, S H / Imai, K / Ishikawa, T /
    Joo, K / Kato, Y / Kon, Y / Lee, H S / Maeda, Y / Mibe, T / Miyabe, M / Morino, Y / Muramatsu, N / Nakano, T / Nakatsugawa, Y / Nam, S I / Niiyama, M / Noumi, H / Ohashi, Y / Ohta, T / Oka, M / Parker, J D / Rangacharyulu, C / Ryu, S Y / Sawada, T / Shimizu, H / Strokovsky, E A / Sugaya, Y / Sumihama, M / Tsunemi, T / Uchida, M / Ungaro, M / Wang, S Y / Yosoi, M

    Physical review letters

    2018  Volume 120, Issue 20, Page(s) 202004

    Abstract: Differential cross sections and photon-beam asymmetries for the γ[over →]p→π^{-}Δ^{++}(1232) reaction have been measured for 0.7

    Abstract Differential cross sections and photon-beam asymmetries for the γ[over →]p→π^{-}Δ^{++}(1232) reaction have been measured for 0.7<cosθ_{π}^{c.m.}<1 and E_{γ}=1.5-2.95  GeV at SPring-8/LEPS. The first-ever high statistics cross-section data are obtained in this kinematical region, and the asymmetry data for 1.5<E_{γ}(GeV)<2.8 are obtained for the first time. This reaction has a unique feature for studying the production mechanisms of a pure uu[over ¯] quark pair in the final state from the proton. Although there is no distinct peak structure in the cross sections, a non-negligible excess over the theoretical predictions is observed at E_{γ}=1.5-1.8  GeV. The asymmetries are found to be negative in most of the present kinematical regions, suggesting the dominance of π exchange in the t channel. The negative asymmetries at forward meson production angles are different from the asymmetries previously measured for the photoproduction reactions producing a dd[over ¯] or an ss[over ¯] quark pair in the final state. Advanced theoretical models introducing nucleon resonances and additional unnatural-parity exchanges are needed to reproduce the present data.<br />
    Language English
    Publishing date 2018-05-18
    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.120.202004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Interference Effect between ϕ and Λ(1520) Production Channels in the γp→K^{+}K^{-}p Reaction near Threshold.

    Ryu, S Y / Ahn, J K / Nakano, T / Ahn, D S / Ajimura, S / Akimune, H / Asano, Y / Chang, W C / Chen, J Y / Daté, S / Ejiri, H / Fujimura, H / Fujiwara, M / Fukui, S / Hasegawa, S / Hicks, K / Horie, K / Hotta, T / Hwang, S H /
    Imai, K / Ishikawa, T / Iwata, T / Kato, Y / Kawai, H / Kino, K / Kohri, H / Kon, Y / Kumagai, N / Lin, P J / Maeda, Y / Makino, S / Matsuda, T / Matsuoka, N / Mibe, T / Miyabe, M / Miyachi, M / Morino, Y / Muramatsu, N / Murayama, R / Nakatsugawa, Y / Nam, S I / Niiyama, M / Nomachi, M / Ohashi, Y / Ohkuma, H / Ohta, T / Ooba, T / Oshuev, D S / Parker, J D / Rangacharyulu, C / Sakaguchi, A / Sawada, T / Shagin, P M / Shiino, Y / Shimizu, H / Strokovsky, E A / Sugaya, Y / Sumihama, M / Tokiyasu, A O / Toi, Y / Toyokawa, H / Tsunemi, T / Uchida, M / Ungaro, M / Wakai, A / Wang, C W / Wang, S C / Yonehara, K / Yorita, T / Yoshimura, M / Yosoi, M / Zegers, R G T

    Physical review letters

    2016  Volume 116, Issue 23, Page(s) 232001

    Abstract: The ϕ-Λ(1520) interference effect in the γp→K^{+}K^{-}p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where ...

    Abstract The ϕ-Λ(1520) interference effect in the γp→K^{+}K^{-}p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K^{+}K^{-} pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the sqrt[s]=2.1  GeV bump structure in forward differential cross sections for ϕ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.
    Language English
    Publishing date 2016-06-10
    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.116.232001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Interference effect between $\phi$ and $\Lambda(1520)$ production channels in the $\gamma p \rightarrow K^+K^-p$ reaction near threshold

    Ryu, S. Y. / Ahn, J. K. / Nakano, T. / Ahn, D. S. / Ajimura, S. / Akimune, H. / Asano, Y. / Chang, W. C. / Chen, J. Y. / Date, S. / Ejiri, H. / Fujimura, H. / Fujiwara, M. / Fukui, S. / Hasegawa, S. / Hicks, K. / Horie, K. / Hotta, T. / Hwang, S. H. /
    Imai, K. / Ishikawa, T. / Iwata, T. / Kato, Y. / Kawai, H. / Kino, K. / Kohri, H. / Kon, Y. / Kumagai, N. / Lin, P. J. / Maeda, Y. / Makino, S. / Matsuda, T. / Matsuoka, N. / Mibe, T. / Miyabe, M. / Miyachi, M. / Morino, Y. / Muramatsu, N. / Murayama, R. / Nakatsugawa, Y. / Nam, S. i. / Niiyama, M. / Nomachi, M. / Ohashi, Y. / Ohkuma, H. / Ohta, T. / Ooba, T. / Oshuev, D. S. / Parker, J. D. / Rangacharyulu, C. / Sakaguchi, A. / Sawada, T. / Shagin, P. M. / Shiino, Y. / Shimizu, H. / Strokovsky, E. A. / Sugaya, Y. / Sumihama, M. / Tokiyasu, A. O. / Toi, Y. / Toyokawa, H. / Tsunemi, T. / Uchida, M. / Ungaro, M. / Wakai, A. / Wang, C. W. / Wang, S. C. / Yonehara, K. / Yorita, T. / Yoshimura, M. / Yosoi, M. / Zegers, R. G. T.

    2016  

    Abstract: The $\phi$-$\Lambda(1520)$ interference effect in the $\gamma p\to K^+K^-p$ reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between $\phi$ and $\Lambda(1520)$ production amplitudes were ... ...

    Abstract The $\phi$-$\Lambda(1520)$ interference effect in the $\gamma p\to K^+K^-p$ reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between $\phi$ and $\Lambda(1520)$ production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when $K^+K^-$ pairs are observed at forward angles, but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the $\sqrt{s}=2.1$ GeV bump structure in forward differential cross sections for $\phi$ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange and rescattering processes via other hyperon states.
    Keywords Nuclear Experiment
    Subject code 612
    Publishing date 2016-03-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Online: Technical Design Report for the PANDA Endcap Disc DIRC

    Panda Collaboration / Davi, F. / Erni, W. / Krusche, B. / Steinacher, M. / Walford, N. / Liu, H. / Liu, Z. / Liu, B. / Shen, X. / Wang, C. / Zhao, J. / Albrecht, M. / Erlen, T. / Feldbauer, F. / Fink, M. / Freudenreich, V. / Fritsch, M. / Heinsius, F. H. /
    Held, T. / Holtmann, T. / Keshk, I. / Koch, H. / Kopf, B. / Kuhlmann, M. / Kümmel, M. / Leiber, S. / Musiol, P. / Mustafa, A. / Pelizäus, M. / Pitka, A. / Reicherz, G. / Richter, M. / Schnier, C. / Schröder, T. / Sersin, S. / Sohl, L. / Sowa, C. / Steinke, M. / Triffterer, T. / Wiedner, U. / Beck, R. / Hammann, C. / Hartmann, J. / Ketzer, B. / Kube, M. / Rossbach, M. / Schmidt, C. / Schmitz, R. / Thoma, U. / Urban, M. / Bianconi, A. / Bragadireanu, M. / Pantea, D. / Czyzycki, W. / Domagala, M. / Filo, G. / Jaworowski, J. / Krawczyk, M. / Lisowski, E. / Lisowski, F. / Michalek, M. / Plazek, J. / Korcyl, K. / Kozela, A. / Kulessa, P. / Lebiedowicz, P. / Pysz, K. / Schäfer, W. / Szczurek, A. / Fiutowski, T. / Idzik, M. / Mindur, B. / Swientek, K. / Biernat, J. / Kamys, B. / Kistryn, S. / Korcyl, G. / Krzemien, W. / Magiera, A. / Moskal, P. / Przygoda, W. / Rudy, Z. / Salabura, P. / Smyrski, J. / Strzempek, P. / Wronska, A. / Augustin, I. / Böhm, R. / Lehmann, I. / Marinescu, D. Nicmorus / Schmitt, L. / Varentsov, V. / Al-Turany, M. / Belias, A. / Deppe, H. / Veis, N. Divani / Dzhygadlo, R. / Flemming, H. / Gerhardt, A. / Götzen, K. / Karabowicz, R. / Kurilla, U. / Lehmann, D. / Löchner, S. / Lühning, J. / Lynen, U. / Nakhoul, S. / Orth, H. / Peters, K. / Saito, T. / Schepers, G. / Schmidt, C. J. / Schwarz, C. / Schwiening, J. / Täschner, A. / Traxler, M. / Voss, B. / Wieczorek, P. / Wilms, A. / Abazov, V. / Alexeev, G. / Arefiev, V. A. / Astakhov, V. / Barabanov, M. Yu. / Batyunya, B. V. / Dodokhov, V. Kh. / Efremov, A. / Fechtchenko, A. / Galoyan, A. / Golovanov, G. / Koshurnikov, E. K. / Lobanov, Y. Yu. / Lobanov, V. I. / Malyshev, V. / Olshevskiy, A. G. / Piskun, A. A. / Samartsev, A. / Sapozhnikov, M. G. / Skachkov, N. B. / Skachkova, A. N. / Strokovsky, E. A. / Tokmenin, V. / Uzhinsky, V. / Verkheev, A. / Vodopianov, A. / Zhuravlev, N. I. / Zinchenko, A. / Branford, D. / Glazier, D. / Watts, D. / Böhm, M. / Eyrich, W. / Lehmann, A. / Miehling, D. / Pfaffinger, M. / Stelter, S. / Uhlig, F. / Dobbs, S. / Seth, K. / Tomaradze, A. / Xiao, T. / Bettoni, D. / Ali, A. / Hamdi, A. / Krebs, M. / Nerling, F. / Akishina, V. / Gorbunov, S. / Kisel, I. / Kozlov, G. / Pugach, M. / Zyzak, M. / Bianchi, N. / Gianotti, P. / Guaraldo, C. / Lucherini, V. / Bracco, G. / Bodenschatz, S. / Brinkmann, K. T. / Di Pietro, V. / Diehl, S. / Dormenev, V. / Düren, M. / Etzelmüller, E. / Föhl, K. / Galuska, M. / Geßler, T. / Gutz, E. / Hahn, C. / Hayrapetyan, A. / Kesselkaul, M. / Kühn, W. / Kuske, T. / Lange, J. S. / Liang, Y. / Metag, V. / Moritz, M. / Nanova, M. / Novotny, R. / Quagli, T. / Riccardi, A. / Rieke, J. / Schmidt, M. / Schnell, R. / Stenzel, H. / Strickert, M. / Thöring, U. / Wasem, T. / Wohlfahrt, B. / Zaunick, H. G. / Tomasi-Gustafsson, E. / Ireland, D. / Rosner, G. / Seitz, B. / Deepak, P. N. / Kulkarni, A. / Apostolou, A. / Babai, M. / Kavatsyuk, M. / Loehner, H. / Messchendorp, J. / Schakel, P. / Tiemens, M. / van der Weele, J. C. / Vejdani, S. / Dutta, K. / Kalita, K. / Sohlbach, H. / Bai, M. / Bianchi, L. / Büscher, M. / Derichs, A. / Dosdall, R. / Erven, A. / Fracassi, V. / Gillitzer, A. / Goldenbaum, F. / Grunwald, D. / Jokhovets, L. / Kemmerling, G. / Kleines, H. / Lai, A. / Lehrach, A. / Mikirtychyants, M. / Orfanitski, S. / Prasuhn, D. / Prencipe, E. / Pütz, J. / Ritman, J. / Rosenthal, E. / Schadmand, S. / Sefzick, T. / Serdyuk, V. / Sterzenbach, G. / Stockmanns, T. / Wintz, P. / Wüstner, P. / Xu, H. / Zhou, Y. / Li, Z. / Ma, X. / Rigato, V. / Isaksson, L. / Achenbach, P. / Aycock, A. / Corell, O. / Denig, A. / Distler, M. / Hoek, M. / Lauth, W. / Merkel, H. / Müller, U. / Pochodzalla, J. / Sanchez, S. / Schlimme, S. / Sfienti, C. / Thiel, M. / Zambrana, M. / Ahmadi, H. / Ahmed, S. / Bleser, S. / Capozza, L. / Cardinali, M. / Dbeyssi, A. / Ehret, A. / Fröhlich, B. / Grasemann, P. / Haasler, S. / Izard, D. / Jorge, J. / Khaneft, D. / Klasen, R. / Kliemt, R. / Köhler, J. / Leithoff, H. H. / Lin, D. / Maas, F. / Maldaner, S. / Michel, M. / Espi, M. C. Mora / Morales, C. Morales / Motzko, C. / Noll, O. / Pflüger, S. / Pineiro, D. Rodriguez / Steinen, M. / Walaa, E. / Wolff, S. / Zimmermann, I. / Fedorov, A. / Korzhik, M. / Missevitch, O. / Balanutsa, P. / Chernetsky, V. / Demekhin, A. / Dolgolenko, A. / Fedorets, P. / Gerasimov, A. / Goryachev, V. / Kirin, D. Y. / Matveev, V. A. / Stavinskiy, A. V. / Balashoff, A. / Boukharov, A. / Malyshev, O. / Marishev, I. / Chandratre, V. / Datar, V. / Jha, V. / Kumawat, H. / Mohanty, A. K. / Parmar, A. / Rai, A. K. / Roy, B. / Sonika, G. / Fritzsch, C. / Grieser, S. / Hergemöller, A. K. / Hetz, B. / Hüsken, N. / Khoukaz, A. / Wessels, J. P. / Herold, C. / Khosonthongkee, K. / Kobdaj, C. / Limphirat, A. / Srisawad, P. / Yan, Y. / Blinov, A. E. / Kononov, S. / Kravchenko, E. A. / Antokhin, E. / Barnyakov, M. / Barnyakov, A. Yu. / Beloborodov, K. / Blinov, V. E. / Bobrovnikov, V. S. / Kuyanov, I. A. / Onuchin, A. P. / Pivovarov, S. / Pyata, E. / Serednyakov, S. / Tikhonov, Y. / Kunne, R. / Marchand, D. / Ramstein, B. / van de Wiele, J. / Wang, Y. / Boca, G. / Burian, V. / Finger, M. / Nikolovova, A. / Pesek, M. / Peskova, M. / Pfeffer, M. / Prochazka, I. / Slunecka, M. / Gallus, P. / Jary, V. / Novy, J. / Tomasek, M. / Virius, M. / Vrba, V. / Abramov, V. / Belikov, N. / Bukreeva, S. / Davidenko, A. / Derevschikov, A. / Goncharenko, Y. / Grishin, V. / Kachanov, V. / Kormilitsin, V. / Levin, A. / Melnik, Y. / Minaev, N. / Mochalov, V. / Morozov, D. / Nogach, L. / Poslavskiy, S. / Ryazantsev, A. / Ryzhikov, S. / Semenov, P. / Shein, I. / Uzunian, A. / Vasiliev, A. / Yakutin, A. / Roy, U. / Yabsley, B. / Belostotski, S. / Gavrilov, G. / Izotov, A. / Manaenkov, S. / Miklukho, O. / Veretennikov, D. / Zhdanov, A. / Bäck, T. / Cederwall, B. / Makonyi, K. / Preston, M. / Tegner, P. E. / Wölbing, D. / Godre, S. / Bussa, M. P. / Marcello, S. / Spataro, S. / Iazzi, F. / Introzzi, R. / Lavagno, A. / Calvo, D. / De Remigis, P. / Filippi, A. / Mazza, G. / Rivetti, A. / Wheadon, R. / Martin, A. / Calen, H. / Andersson, W. Ikegami / Johansson, T. / Kupsc, A. / Marciniewski, P. / Papenbrock, M. / Pettersson, J. / Regina, J. / Schönning, K. / Wolke, M. / Diaz, J. / Chackara, V. Pothodi / Chlopik, A. / Kesik, G. / Melnychuk, D. / Slowinski, B. / Trzcinski, A. / Wojciechowski, M. / Wronka, S. / Zwieglinski, B. / Bühler, P. / Marton, J. / Steinschaden, D. / Suzuki, K. / Widmann, E. / Zimmermann, S. / Zmeskal, J.

    2019  

    Abstract: PANDA (anti-Proton ANnihiliation at DArmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address fundamental ... ...

    Abstract PANDA (anti-Proton ANnihiliation at DArmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address fundamental questions of hadron physics and quantum chromodynamics using cooled antiproton beams with a high intensity and and momenta between 1.5 and 15 GeV/c. PANDA is designed to reach a maximum luminosity of 2x10^32 cm^2 s. Most of the physics programs require an excellent particle identification (PID). The PID of hadronic states at the forward endcap of the target spectrometer will be done by a fast and compact Cherenkov detector that uses the detection of internally reflected Cherenkov light (DIRC) principle. It is designed to cover the polar angle range from 5{\deg} to 22{\deg} and to provide a separation power for the separation of charged pions and kaons up to 3 standard deviations (s.d.) for particle momenta up to 4 GeV/c in order to cover the important particle phase space. This document describes the technical design and the expected performance of the novel PANDA Disc DIRC detector that has not been used in any other high energy physics experiment (HEP) before. The performance has been studied with Monte-Carlo simulations and various beam tests at DESY and CERN. The final design meets all PANDA requirements and guarantees suffcient safety margins.

    Comment: TDR for Panda/Fair to be published
    Keywords Physics - Instrumentation and Detectors
    Subject code 621
    Publishing date 2019-12-29
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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