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  A Measurement of the ψ′ to J/ψ production ratio in 920 GeV proton-nucleus interactions

Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., Aplin, S. J., Aushev, V., Bagaturia, Y., Balagura, V., Bargiotti, M., Barsukova, O., Bastos, J., Bauer, C., Bauer, T. S., Belkov, A., Belkov, A., Bertin, A., Bobchenko, B., Boecker, M., Bogatyrev, A., Bohm, G., Braeuer, M., Bruinsma, M., Bruschi, M., Buchholz, P., Buran, T., Carvalho, J., Conde, P., Cruse, C., Dam, M., Danielsen, K. M., Danilov, M., De Castro, S., Deppe, H., Dong, X., Dreis, H. B., Egorytchev, V., Ehret, K., Eisele, F., Emeliyanov, D., Essenov, S., Fabbri, L., Faccioli, P., Feuerstack-Raible, M., Flammer, J., Fominykh, B., Funcke, M., Garrido, L., Giacobbe, B., Glaess, J., Goloubkov, D., Goloubkov, Y., Golutvin, A., Golutvin, I., Gorbounov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Guilitsky, Y., Hansen, J. D., Hernandez, J. M., Hofmann, W., Hott, T., Hulsbergen, W., Husemann, U., Igonkina, O., Ispiryan, M., Jagla, T., Jiang, C., Kapitza, H., Karabekyan, S., Karpenko, N., Keller, S., Khasanov, F., Kiryushin, Y., Knöpfle, K. T., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Kruecker, D., Kvaratskheliia, T., Lanyov, A., Lau, K., Lewendel, B., Lohse, T., Maenner, R., Masciocchi, S., Massa, I., Matchikhilian, L., Medin, G., Medinnis, M., Mevius, M., Michetti, A., Mikhailov, Y., Mizuk, R., Muresan, R., Negodaev, M., Noerenberg, M., Nowak, S., Nunez Pardo de Vera, M. T., Ouchrif, M., Ould-Saada, F., Padilla, C., Peralta, D., Pernack, R., Pestotnik, R., Piccinini, M., Pleier, M. A., Poli, M., Popov, V., Pose, D., Pugatch, V., Pylypchenko, Y., Pyrlik, J., Reeves, K., Ressing, D., Riu, I., Robmann, P., Rybnikov, V., Sanchez, F., Sbrizzi, A., Schmelling, M., Schmidt, B., Schreiner, A., Schroeder, H., Schwartz, A. J., Schwarz, A. S., Schwenninger, B., Schwingenheuer, B., Sciacca, F., Semprini-Cesari, N., Shuvalov, S., Sozuer, L., Solunin, S., Somov, A., Somov, S., Spengler, J., Spighi, R., Spiridonov, A., Stanovnik, A., Staric, M., Stegmann, C., Symalla, M., Tikhomirov, I., Titov, M., Tsakov, I., Uwer, U., van Eldik, C., Vassiliev, Y., Villa, M., Vitale, A., Vukotic, I., Wahlberg, H., Walenta, A. H., Walter, M., Wang, J. J., Wegener, D., Werthenbach, U., Wolters, H., Wurth, R., Wurz, A., Zaitsev, Y., Zavertyaev, M., Zeuner, T., Zhelezov, A., Zheng, Z., Zimmermann, R., Zivko, T., Zoccoli, A., Aleksandrov, A., Batista, J., Grimaldi, F., Kessler, J., Kupper, S., zur Nedden, M., Prystupa, S., Rick, H., Rostovtseva, I., Silva, L., Subramania, H. S., Lomonosov, B., Agari, M., Belotelov, I., Groth-Jensen, J., Gellrich, A., Hohlmann, M., Kisel, I., Klinkby, E., Mankel, R., Petersen, B., & Schwanke, U. (2006). A Measurement of the ψ′ to J/ψ production ratio in 920 GeV proton-nucleus interactions. The European Physical Journal C - Particles and Fields, 49(2), 545-558. doi:10.1140/epjc/s10052-006-0139-9.

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資料種別: 学術論文

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 作成者:
Abt, I.1, 著者
Adams, M.1, 著者
Albrecht, H.1, 著者
Amaral, V.1, 著者
Amorim, A.1, 著者
Aplin, S. J.1, 著者
Aushev, V.1, 著者
Bagaturia, Y.1, 著者
Balagura, V.1, 著者
Bargiotti, M.1, 著者
Barsukova, O.1, 著者
Bastos, J.1, 著者
Bauer, C.2, 著者           
Bauer, T. S.1, 著者
Belkov, A.1, 著者
Belkov, Ar1, 著者
Bertin, A.1, 著者
Bobchenko, B.1, 著者
Boecker, M.1, 著者
Bogatyrev, A.1, 著者
Bohm, G.1, 著者Braeuer, M.2, 著者           Bruinsma, M.1, 著者Bruschi, M.1, 著者Buchholz, P.1, 著者Buran, T.1, 著者Carvalho, J.1, 著者Conde, P.1, 著者Cruse, C.1, 著者Dam, M.1, 著者Danielsen, K. M.1, 著者Danilov, M.1, 著者De Castro, S.1, 著者Deppe, H.1, 著者Dong, X.1, 著者Dreis, H. B.1, 著者Egorytchev, V.1, 著者Ehret, K.2, 著者           Eisele, F.1, 著者Emeliyanov, D.1, 著者Essenov, S.1, 著者Fabbri, L.1, 著者Faccioli, P.1, 著者Feuerstack-Raible, M.1, 著者Flammer, J.1, 著者Fominykh, B.1, 著者Funcke, M.1, 著者Garrido, L.1, 著者Giacobbe, B.1, 著者Glaess, J.1, 著者Goloubkov, D.1, 著者Goloubkov, Y.1, 著者Golutvin, A.1, 著者Golutvin, I.1, 著者Gorbounov, I.1, 著者Gorisek, A.1, 著者Gouchtchine, O.1, 著者Goulart, D. C.1, 著者Gradl, S.1, 著者Gradl, W.1, 著者Guilitsky, Y.1, 著者Hansen, J. D.1, 著者Hernandez, J. M.1, 著者Hofmann, W.2, 著者           Hott, T.1, 著者Hulsbergen, W.1, 著者Husemann, U.1, 著者Igonkina, O.1, 著者Ispiryan, M.1, 著者Jagla, T.2, 著者           Jiang, C.1, 著者Kapitza, H.1, 著者Karabekyan, S.1, 著者Karpenko, N.1, 著者Keller, S.1, 著者Khasanov, F.1, 著者Kiryushin, Y.1, 著者Knöpfle, K. T.2, 著者           Kolanoski, H.1, 著者Korpar, S.1, 著者Krauss, C.1, 著者Kreuzer, P.1, 著者Krizan, P.1, 著者Kruecker, D.1, 著者Kvaratskheliia, T.1, 著者Lanyov, A.1, 著者Lau, K.1, 著者Lewendel, B.1, 著者Lohse, T.1, 著者Maenner, R.1, 著者Masciocchi, S.2, 著者           Massa, I.1, 著者Matchikhilian, L.1, 著者Medin, G.1, 著者Medinnis, M.1, 著者Mevius, M.1, 著者Michetti, A.1, 著者Mikhailov, Y.1, 著者Mizuk, R.1, 著者Muresan, R.1, 著者Negodaev, M.1, 著者Noerenberg, M.1, 著者Nowak, S.1, 著者Nunez Pardo de Vera, M. T.1, 著者Ouchrif, M.1, 著者Ould-Saada, F.1, 著者Padilla, C.1, 著者Peralta, D.1, 著者Pernack, R.1, 著者Pestotnik, R.1, 著者Piccinini, M.1, 著者Pleier, M. A.2, 著者           Poli, M.1, 著者Popov, V.1, 著者Pose, D.1, 著者Pugatch, V.2, 著者           Pylypchenko, Y.1, 著者Pyrlik, J.1, 著者Reeves, K.2, 著者           Ressing, D.1, 著者Riu, I.1, 著者Robmann, P.1, 著者Rybnikov, V.1, 著者Sanchez, F.2, 著者           Sbrizzi, A.1, 著者Schmelling, M.2, 著者           Schmidt, B.1, 著者Schreiner, A.1, 著者Schroeder, H.1, 著者Schwartz, A. J.1, 著者Schwarz, A. S.1, 著者Schwenninger, B.1, 著者Schwingenheuer, B.2, 著者           Sciacca, F.2, 著者           Semprini-Cesari, N.1, 著者Shuvalov, S.1, 著者Sozuer, L.1, 著者Solunin, S.1, 著者Somov, A.1, 著者Somov, S.1, 著者Spengler, J.2, 著者           Spighi, R.1, 著者Spiridonov, A.1, 著者Stanovnik, A.1, 著者Staric, M.1, 著者Stegmann, C.1, 著者Symalla, M.1, 著者Tikhomirov, I.1, 著者Titov, M.1, 著者Tsakov, I.1, 著者Uwer, U.1, 著者van Eldik, C.2, 著者           Vassiliev, Y.1, 著者Villa, M.1, 著者Vitale, A.1, 著者Vukotic, I.1, 著者Wahlberg, H.1, 著者Walenta, A. H.1, 著者Walter, M.1, 著者Wang, J. J.1, 著者Wegener, D.1, 著者Werthenbach, U.1, 著者Wolters, H.1, 著者Wurth, R.1, 著者Wurz, A.1, 著者Zaitsev, Y.1, 著者Zavertyaev, M.2, 著者           Zeuner, T.1, 著者Zhelezov, A.1, 著者Zheng, Z.1, 著者Zimmermann, R.1, 著者Zivko, T.1, 著者Zoccoli, A.1, 著者Aleksandrov, A.1, 著者Batista, J.1, 著者Grimaldi, F.1, 著者Kessler, J.1, 著者Kupper, S.1, 著者zur Nedden, M.1, 著者Prystupa, S.1, 著者Rick, H.1, 著者Rostovtseva, I.1, 著者Silva, L.1, 著者Subramania, H. S.1, 著者Lomonosov, B.1, 著者Agari, Michaela2, 著者           Belotelov, I.1, 著者Groth-Jensen, J.1, 著者Gellrich, A.1, 著者Hohlmann, M.1, 著者Kisel, I.1, 著者Klinkby, E.1, 著者Mankel, R.1, 著者Petersen, B.1, 著者Schwanke, U.1, 著者I. Abt et al. for the HERA-B Collaboration, 編集者   全て表示
所属:
1NIKHEF, 1009 DB Amsterdam, The Netherlands Department ECM, Faculty of Physics, University of Barcelona, E-08028 Barcelona, Spain Institute for High Energy Physics, Beijing 100039, People's Republic of China Institute of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Dipartimento di Fisica dell' Università di Bologna and INFN Sezione di Bologna, I-40126 Bologna, Italy Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA LIP Coimbra, P-3004-516 Coimbra, Portugal Niels Bohr Institutet, DK 2100 Copenhagen, Denmark Institut für Physik, Universität Dortmund, D-44221 Dortmund, Germany Joint Institute for Nuclear Research Dubna, 141980 Dubna, Moscow region, Russia DESY, D-22603 Hamburg, Germany Physikalisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany Department of Physics, University of Houston, Houston, Texas 77204, USA Institute for Nuclear Research, Ukrainian Academy of Science, 03680 Kiev, Ukraine J. Stefan Institute, 1001 Ljubljana, Slovenia University of Ljubljana, 1001 Ljubljana, Slovenia University of California, Los Angeles, California 90024, USA Lehrstuhl für Informatik V, Universität Mannheim, D-68131 Mannheim, Germany University of Maribor, 2000 Maribor, Slovenia Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia Department of Physics, University of Oslo, N-0316 Oslo, Norway Fachbereich Physik, Universität Rostock, D-18051 Rostock, Germany Fachbereich Physik, Universität Siegen, D-57068 Siegen, Germany Institute for Nuclear Research, INRNE-BAS, Sofia, Bulgaria Universiteit Utrecht/NIKHEF, 3584 CB Utrecht, The Netherlands DESY, D-15738 Zeuthen, Germany Physik-Institut, Universität Zürich, CH-8057 Zürich, Switzerland Dipartimento di Energetica dell' Università di Firenze and INFN Sezione di Bologna, Italy, ou_persistent22              
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              

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 要旨: Ratios of the ψ′ over the J/ψ production cross sections in the dilepton channel for C, Ti and W targets have been measured in 920 GeV proton-nucleus interactions with the HERA-B detector at the HERA storage ring. The ψ′ and J/ψ states were reconstructed in both the μ+μ- and the e+e- decay modes. The measurements covered the kinematic range -0.35≤xF≤0.1 with transverse momentum pT≤4.5 GeV/c. The angular dependence of the ratio has been used to measure the difference of the ψ′ and J/ψ polarization. All results for the muon and electron decay channels are in good agreement: their ratio, averaged over all events, is Rψ′(μ)/Rψ′(e)=1.00±0.08±0.04. This result constitutes a new, direct experimental constraint on the double ratio of branching fractions, (B′(μ)B(e))/(B(μ)B′(e)), of ψ′ and J/ψ in the two channels. The ψ′ to J/ψ production ratio is almost constant in the covered xF range and shows a slow increase with pT.

資料詳細

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言語: eng - English
 日付: 2006-11-18
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり
 識別子(DOI, ISBNなど): eDoc: 301041
DOI: 10.1140/epjc/s10052-006-0139-9
 学位: -

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出版物 1

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出版物名: The European Physical Journal C - Particles and Fields
  出版物の別名 : Europ. Phys. J. C
種別: 学術雑誌
 著者・編者:
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出版社, 出版地: -
ページ: - 巻号: 49 (2) 通巻号: - 開始・終了ページ: 545 - 558 識別子(ISBN, ISSN, DOIなど): ISSN: 1434-6044 (Print) 1434-6052 (Online)