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          Institute: MPI für Kernphysik     Collection: Heavy Flavour Physics     Display Documents

ID: 206478.0, MPI für Kernphysik / Heavy Flavour Physics
Limits for the central production of Θ+ and Ξ-- pentaquarks in 920 GeV pA collsions
Authors: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, Ar; Belotelov, I.; 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.; Fleckenstein, H.; 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.; Negri, I.; 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, A.; Pose, D.; Pugatch, V.; Pylypchenko, Y.; Pyrlik, J.; Reeves, K.; Ressing, D.; Riechmann, K.; 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.; Vagnoni, V.; 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.; Xella-Hansen, S.; Zaitsev, Y.; Zavertyaev, M.; Zech, G.; Zeuner, T.; Zhelezov, A.; Zheng, Z.; Zimmermann, R.; Zivko, T.; Zoccoli, A.; Agari, M.; Aleksandrov, A.; Batista, J.; Grimaldi, F.; Kessler, J.; Kupper, S.; zur Nedden, M.; Prystupa, S.; Rick, H.; Rostovtseva, I.; Silva, L.; Smirnov, K.; Subramania, H. S.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys.Rev.Lett
Start Page:1
End Page:6
Sequence Number of Article:212003
Copyright:The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We have searched for Theta^+(1540) and Xi^{--}(1862) pentaquark candidates in proton-induced reactions on C, Ti and W targets at mid-rapidity and \sqrt{s} = 41.6 GeV. In 2x10^8 inelastic events we find no evidence for narrow (sigma~5 MeV) signals in the Theta^+ -> pK_s and Xi^{--} -> Xi^-pi^- channels; our 95% CL upper limits (UL) for the inclusive production cross section times branching fraction Bx(dsigma/dy)|_{y~0} are 3.7 and 2.5 microb/N. The UL of the yield ratio of [Theta^+ / Lambda(1520)] < 2.7% is significantly lower than model predictions. Our UL of [BxXi^{--} / Xi(1530)^0] < 4% is at variance with the results that have provided first evidence for the Xi^{--} signal.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group W. Hofmann/Heavy Flavour Physics (K. T. Knöpfle, M. Schmelling)
External Affiliations:Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany; Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland; DESY, D-15738 Zeuthen, Germany; NIKHEF H, NL-1009 DB Amsterdam, Netherlands; Univ Utrecht, NIKHEF, NL-3584 CH Utrecht, Netherlands; Univ Gesamthsch Siegen, Fachbereich Phys, D-57068 Siegen, Germany; Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany; Univ Oslo, Dept Phys, N-0316 Oslo, Norway; Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia; Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia; Univ Mannheim, Lehrstuhl Informat 5, D-68131 Mannheim, Germany; Univ Calif Los Angeles, Los Angeles, CA 90024 USA; Univ Maribor, Maribor 2000, Slovenia; Univ Ljubljana, Ljubljana 1001, Slovenia; Jozef Stefan Inst, Ljubljana 1001, Slovenia; Ukrainian Acad Sci, Inst Nucl Res, UA-03680 Kiev, Ukraine; Univ Houston, Dept Phys, Houston, TX 77204 USA; Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany; Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany; DESY, D-22603 Hamburg, Germany; Univ Dortmund, Inst Phys, D-44227 Dortmund, Germany; Niels Bohr Inst, DK-2100 Copenhagen, Denmark; LIP Coimbra & Lisboa, P-3004516 Coimbra, Portugal; Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA; Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy; Ist Nazl Fis Nucl, Sezione Bologna, I-40126 Bologna, Italy; Humboldt Univ, Inst Phys, D-10115 Berlin, Germany; Tsing Hua Univ, Inst Engn Phys, Beijing 100084, Peoples R China; Inst High Energy Phys, Beijing 100039, Peoples R China; Univ Barcelona, Fac Phys, Dept ECM, E-08028 Barcelona, Spain; Institute for Nuclear Research, INRNE-BAS, Sofia, Bulgaria;
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