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10 results on '"BARGIOTTI, MARIANNE"'

4. Addendum to the LHCb Online System Technical Design Report

Author

G. Avoni, D. Bortolotti, M. Bruschi, I. Lax, U. Marconi, R. Spighi, S. Vecchi, LHCB COLLABORATION, BALBI, GABRIELE, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, CARBONE, ANGELO, DE CASTRO, STEFANO, FACCIOLI, PIETRO, FABBRI, LAURA, GALLI, DOMENICO, GIACOBBE, BENEDETTO, GREGORI, DANIELE, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PECO, GIANLUCA, PICCININI, MAURIZIO, SEMPRINI CESARI, NICOLA, VAGNONI, VINCENZO MARIA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, G. Avoni, G. Balbi, M. Bargiotti, A. Bertin, D. Bortolotti, M. Bruschi, A. Carbone, S. de Castro, P. Faccioli, L. Fabbri, D. Galli, B. Giacobbe, D. Gregori, F. Grimaldi, I. Lax, U. Marconi, I. Massa, G. Peco, M. Piccinini, N. Semprini Cesari, R. Spighi, V. Vagnoni, S. Vecchi, M. Villa, A. Vitale, A. Zoccoli, and LHCB COLLABORATION

Published
2005

5. HERA-G, A NEW EXPERIMENT FOR GLUEBALL, HYBRID AND ODDERON STUDIES AT DESY. PROPOSAL FOR A NEW EXPERIMENTAL PROGRAM USING THE EXISTING HERA-B DETECTOR

Author

T. Lohse, M. zur Nedden, M. Bruschi, M. Capponi, B. Giacobbe, U. Marconi, M. Poli, R. Spighi, S. Vecchi, A. Bianconi, M. Corradini, A. Donzella, E. Lodi Rizzini, L. Venturelli, N. Zurlo, Y.u. Kiryushin, A. Lanyov, D. Pose, S. Reznikov, S. Somov, G. Evgrafov, I. Belotelov, M. A. Reyes, J. Felix, M. Medinnis, M. Brauer, J. Spengler, V. Pugatch, Y.u. Vasilev, V. Aushev, S. Prystupa, Y.u. Pavlenko, V. Kyva, M. Molodyko, J. D. Hansen, R. Muresan, M. Staric, R. Pestotnik, A. Stanovnik, S. Erhan, P. Schlein, G. Medin, V. A. Bogatyrev, V. Balagura, M. Danilov, F. Khasanov, B. Fominykh, R. Mizuk, I. Matchikhilian, I. Rostovtseva, V. Popov, S. Esenov, S. Shuvalov, I. Tikhomirov, Y.u. Zaitsev, S. Aplin, V. Galkin, A. Golovin, D. Ryzhikov, V. Savelev, M. Zaboudko, Y. Arestov, B. Chuiko, D. Konstantinov, V. Lishin, V. Shelikhov, L. Ferrero, R. Garfagnini, G. Piragino, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, CARBONE, ANGELO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GALLI, DOMENICO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, T. Lohse, M. zur Nedden, M. Bargiotti, A. Bertin, M. Bruschi, M. Capponi, A. Carbone, S. De Castro, L. Fabbri, P. Faccioli, D. Galli, B. Giacobbe, U. Marconi, I. Massa, M. Piccinini, M. Poli, N. Semprini-Cesari, R. Spighi, S. Vecchi, M. Villa, A. Vitale, A. Zoccoli, A. Bianconi, M. Corradini, A. Donzella, E. Lodi Rizzini, L. Venturelli, N. Zurlo, Yu. Kiryushin, A. Lanyov, D. Pose, S. Reznikov, S. Somov, G. Evgrafov, I. Belotelov, M.A. Reye, J. Felix, M. Medinni, M. Brauer, J. Spengler, V. Pugatch, Yu. Vasilev, V. Aushev, S. Prystupa, Yu. Pavlenko, V. Kyva, M. Molodyko, J.D. Hansen, R. Muresan, M. Staric, R. Pestotnik, A. Stanovnik, S. Erhan, P. Schlein, G. Medin, V.A. Bogatyrev, V. Balagura, M. Danilov, F. Khasanov, B. Fominykh, R. Mizuk, I. Matchikhilian, I. Rostovtseva, V. Popov, S. Esenov, S. Shuvalov, I. Tikhomirov, Yu. Zaitsev, S. Aplin, V. Galkin, A. Golovin, D. Ryzhikov, V. Savelev, M. Zaboudko, Y. Arestov, B. Chuiko, D. Konstantinov, V. Lishin, V. Shelikhov, L. Ferrero, R. Garfagnini, and G. Piragino

Published
2004

6. Limits for the central production of Θ+ and Ξ−− pentaquarks in 920-GeV pA collisions

Author

Abt, Iris, Adams, Mark Raymond, Agari, Michaela, Albrecht, Hartwig, Aleksandrov, A., Amaral, Vasco, Amorim, Antonio, Aplin, Steven, Aushev, Volodymyr, Bagaturia, Iuri, Balagura, Vladislav, Bargiotti, Marianne, Barsukova, O., Bastos, Joao Afonso, Batista, Joao Miguel Nobre, Bauer, Christian, Bauer, Thomas S., Belkov, Ar, Belkov, Ar., Belotelov, I., Bertin, A., Bobchenko, B., Böcker, M., Bogatyrev, A., Bohm, G., Bräuer, 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 Beltran, Lluís, Giacobbe, B., Gläß, J., Goloubkov, D., Golubkov, Y., Golutvin, A., Golutvin, I., Gorbounov, I., Gorisek, A., Gouchtchine, O., Goulart, D. C., Gradl, S., Gradl, W., Grimaldi, F., Groth-Jensen, J., Guilitsky, Yu., 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., Kessler, J., Khasanov, F., Kiryushin, Yu., Klinkby, E., Knöpfle, K. T., Kolanoski, H., Korpar, S., Krauss, C., Kreuzer, P., Krizan, P., Krücker, D., Kupper, S., Kvaratskheliia, T., Lanyov, A., Lau, K., Lewendel, B., Lohse, T., Lomonosov, B., Männer, R., Masciocchi, S., Massa, I., Matchikhilian, I., Medin, G., Medinnis, M., Mevius, M., Michetti, A., Mikhailov, Yu., Mizuk, R., Muresan, R., Negodaev, M., Nörenberg, M., Nowak, S., Nuñez Pardo de Vera, M. T., Ouchrif, M., Ould-Saada, F., Padilla, Cristobal, Peralta, D., Pernack, R., Pestotnik, R., Piccinini, M., Pleier, Marc-Andre, Poli, M., Popov, V., Pose, A., Pose, D., Prystupa, S., Pugatch, V. M., Pylypchenko, Y., Pyrlik, J., Reeves, K., Reßing, D., Rick, H., Riu, I., Robmann, P., Rostovtseva, I., Rybnikov, V., Sánchez Nieto, Federico, Sbrizzi, A., Schmelling, M., Schmidt, B., Schreiner, A., Schröder, H., Schwartz, Alan J., Schwarz, Andreas S., Schwenninger, B., Schwingenheuer, B., Sciacca, F., Semprini-Cesari, N., Shuvalov, S., Silva, L., Smirnov, K., Solunin, S., Somov, A., Somov, S., Sözüer, L., Spengler, J., Spighi, R., Spiridonov, A., Stanovnik, A., Staric, M., Stegmann, C., Subramania, H. S., Symalla, M., Tikhomirov, I., Titov, Maxim P., Tsakov, I., Uwer, U., Vassiliev, Yu, 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, Yu., Zavertyaev, M., Zech, Gunter, Zeuner, T., Zhelezov, A., Zheng, Z., Zimmermann, R., Zivko, T., Zoccoli, A., van Eldik, C., and Zur Nedden, M

Abstract

We have searched for Θ+(1540) and Ξ−−(1862) pentaquark candidates in proton-inducedreactions on C, Ti, and W targets at midrapidity and s√=41.6 GeV. In 2×108 inelastic eventswe find no evidence for narrow (σ≈5 MeV) signals in the Θ+→pK0S and Ξ−−→Ξ−π− channels; our 95% C.L. upper limits (UL) forthe inclusive production cross section times branching fraction B dσ/dy $y ≈0 are (4-16) μb/N for a Θ+ mass between 1521 and 1555 MeV,and 2.5μb/N for the Ξ−−. The UL of the yield ratio of Θ+/Λ(1520)

Published
2004

7. Search for the flavor-changing neutral current decay D(0) ->mu(+)mu(-) with the HERA-B detector

Author

I. ABT, M. ADAMS, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, M. BUCHLER, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, Y.U. GUILITSKY, J. D. HANSEN, R. HARR, J. M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, P. KARCHIN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, S. NAM, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, J. SHIU, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, M. BUCHLER, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, R. HARR, J.M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, P. KARCHIN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, S. NAM, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A.J. SCHWARTZ, A.S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, J. SHIU, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Abstract

We report on a search for the flavor-changing neutral current decay $D^0 to mu^+mu^-$ using $50 times 10^6$ events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction $Br(D^0 to mu^+mu^-)

Published
2004

8. Charm, beauty and charmonium production at HERA-B

Author

ZOCCOLI, ANTONIO, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ABT I, ADAMS M, AGARI M, ALBRECHT H, ALEKSANDROV A, AMARAL V, AMORIM A, APLIN SJ, AUSHEV V, BAGATURIA Y, BALAGURA V, BARSUKOVA O, BASTOS J, BATISTA J, BAUER C, BAUER TS, BELKOV A, BELOTELOV I, BOBCHENKO B, BOCKER M, BOGATYREV A, BOHM G, BRAUER M, BRUINSMA M, BRUSCHI M, BUCHHOLZ P, BURAN T, CARVALHO J, CONDE P, CRUSE C, DAM M, DANIELSEN KM, DANILOV M, DEPPE H, DONG X, DREIS HB, EGORYTCHEV V, EHRET K, EISELE F, EMELIYANOV D, ESSENOV S, FEUERSTACK RAIBLE M, FLAMMER J, FOMINYKH B, FUNCKE M, GARRIDO L, GIACOBBE B, GIOVANNINI P, GLASS J, GOLOUBKOV D, GOLUBKOV Y, GOLUTVIN A, GOLUTVIN I, GORBOUNOV I, GORISEK A, GOUCHTCHINE O, GOULART DC, GRADL S, GRADL W, GUILITSKY Y, HANSEN JD, HERNANDEZ JM, HOFMANN W, HOTT T, HULSBERGEN W, HUSEMANN U, IGONKINA O, ISPIRYAN M, JAGLA T, JIANG C, KAPITZA H, KARABEKYAN S, KARPENKO N, KELLER S, KESSLER J, KHASANOV F, KIRYUSHIN Y, KLINKBY E, KNOPFLE KT, KOLANOSKI H, KORPAR S, KRAUSS C, KREUZER P, KRIZAN P, KRUCKER D, KUPPER S, KVARATSKHELIIA T, LANYOV A, LAU K, LEWENDEL B, LOHSE T, LOMONOSOV B, MANNER R, MASCIOCCHI S, MATCHIKHILIAN I, MEDIN G, MEDINNIS M, MEVIUS M, MICHETTI A, MIKHAILOV Y, MIZUK R, MURESAN R, ZUR NEDDEN M, NEGODAEV M, NORENBERG M, NOWAK S, DE VERA MTNP, OUCHRIF M, OULD SAADA F, PERALTA D, PERNACK R, PESTOTNIK R, PLEIER MA, POLI M, POPOV V, POSE D, PRYSTUPA S, PUGATCH V, PYLYPCHENKO Y, PYRLIK J, REEVES K, RESSING D, RICK H, RIU I, ROBMANN P, SCHRODER H, SCHWARTZ AJ, SCHWARZ AS, SCHWENNINGER B, SCHWINGENHEUER B, SCIACCA F, SHUVALOV S, SILVA L, SOZUER L, SOLUNIN S, SOMOV A, SOMOV S, SPENGLER J, SPIGHI R, SPIRIDONOV A, STANOVNIK A, STARIC M, STEGMANN C, SUBRAMANIA HS, SYMALLA M, TIKHOMIROV I, TITOV M, TSAKOV I, UWER U, VAN ELDIK C, VASSILIEV Y, VUKOTIC I, WAHLBERG H, WALENTA AH, WALTER M, WANG JJ, WEGENER D, WERTHENBACH U, WOLTERS H, WURTH R, WURZ A, ZAITSEV Y, ZAVERTYAEV M, ZECH G, ZEUNER T, ZHELEZOV A, ZHENG Z, ZIMMERMANN R, ZIVKO T., ZOCCOLI A, ABT I, ADAMS M, AGARI M, ALBRECHT H, ALEKSANDROV A, AMARAL V, AMORIM A, APLIN SJ, AUSHEV V, BAGATURIA Y, BALAGURA V, BARGIOTTI M, BARSUKOVA O, BASTOS J, BATISTA J, BAUER C, BAUER TS, BELKOV A, BELOTELOV I, BERTIN A, BOBCHENKO B, BOCKER M, BOGATYREV A, BOHM G, BRAUER M, BRUINSMA M, BRUSCHI M, BUCHHOLZ P, BURAN T, CARVALHO J, CONDE P, CRUSE C, DAM M, DANIELSEN KM, DANILOV M, DE CASTRO S, DEPPE H, DONG X, DREIS HB, 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, GIOVANNINI P, GLASS J, GOLOUBKOV D, GOLUBKOV Y, GOLUTVIN A, GOLUTVIN I, GORBOUNOV I, GORISEK A, GOUCHTCHINE O, GOULART DC, GRADL S, GRADL W, GRIMALDI F, GUILITSKY Y, HANSEN JD, HERNANDEZ JM, HOFMANN W, HOTT T, HULSBERGEN W, HUSEMANN U, IGONKINA O, ISPIRYAN M, JAGLA T, JIANG C, KAPITZA H, KARABEKYAN S, KARPENKO N, KELLER S, KESSLER J, KHASANOV F, KIRYUSHIN Y, KLINKBY E, KNOPFLE KT, KOLANOSKI H, KORPAR S, KRAUSS C, KREUZER P, KRIZAN P, KRUCKER D, KUPPER S, KVARATSKHELIIA T, LANYOV A, LAU K, LEWENDEL B, LOHSE T, LOMONOSOV B, MANNER R, MASCIOCCHI S, MASSA I, MATCHIKHILIAN I, MEDIN G, MEDINNIS M, MEVIUS M, MICHETTI A, MIKHAILOV Y, MIZUK R, MURESAN R, ZUR NEDDEN M, NEGODAEV M, NORENBERG M, NOWAK S, DE VERA MTNP, OUCHRIF M, OULD-SAADA F, PERALTA D, PERNACK R, PESTOTNIK R, PICCININI M, PLEIER MA, POLI M, POPOV V, POSE D, PRYSTUPA S, PUGATCH V, PYLYPCHENKO Y, PYRLIK J, REEVES K, RESSING D, RICK H, RIU I, ROBMANN P, SCHRODER H, SCHWARTZ AJ, SCHWARZ AS, SCHWENNINGER B, SCHWINGENHEUER B, SCIACCA F, SEMPRINI-CESARI N, SHUVALOV S, SILVA L, SOZUER L, SOLUNIN S, SOMOV A, SOMOV S, SPENGLER J, SPIGHI R, SPIRIDONOV A, STANOVNIK A, STARIC M, STEGMANN C, SUBRAMANIA HS, SYMALLA M, TIKHOMIROV I, TITOV M, TSAKOV I, UWER U, VAN ELDIK C, VASSILIEV Y, VILLA M, VITALE A, VUKOTIC I, WAHLBERG H, WALENTA AH, WALTER M, WANG JJ, WEGENER D, WERTHENBACH U, WOLTERS H, WURTH R, WURZ A, ZAITSEV Y, ZAVERTYAEV M, ZECH G, ZEUNER T, ZHELEZOV A, ZHENG Z, ZIMMERMANN R, and ZIVKO T

Subjects
Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), Meson, DESY, HERA, Quarkonium, Nuclear physics, Pair production, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, Engineering (miscellaneous), HERA-B
Abstract

is a fixed target experiment working on the 920 GeV proton beam of the HERA accelerator at the DESY laboratory in Hamburg. During the last data taking period (2002-2003), about 150 million dilepton triggers, 220 million minimum bias events and 35 million hard photon triggers were acquired. These large statistics allow detailed studies on the production of charmonium states in proton-nucleus p-A collisions, which extend for the first time into the negative Feynman-x () region. Measurements of the inclusive , $\Upsilon$ and open charm cross sections are also ongoing. After a brief discussion of the detector and of the data samples, we report on preliminary results obtained on these physics topics.

Published
2004

9. pbar p annihilation into four charged pions at rest and in flight

Author

P. SALVINI, V. I. TRETYAK, V. FILIPPINI, A. FONTANA, P. MONTAGNA, A. PANZARASA, A. ROTONDI, M. BRUSCHI, B. GIACOBBE, U. MARCONI, R. SPIGHI, S. VECCHI, A. BIANCONI, M. CORRADINI, A. DONZELLA, E. LODI RIZZINI, L. VENTURELLI, A. ZENONI, C. CICALÒ, A. DE FALCO, A. MASONI, G. PUDDU, S. SERCI, G. USAI, O. E. GORCHAKOV, S. N. PRAKHOV, A. M. ROZHDESTVENSKY, M. G. SAPOZHNIKOV, M. POLI, P. GIANOTTI, C. GUARALDO, A. LANARO, V. LUCHERINI, C. PETRASCU, D. PANZIERI, F. BALESTRA, M. P. BUSSA, L. BUSSO, P. CERELLO, O. DENISOV, L. FERRERO, A. GRASSO, A. MAGGIORA, F. TOSELLO, E. BOTTA, T. BRESSANI, D. CALVO, F. DE MORI, A. FELICIELLO, A. FILIPPI, S. MARCELLO, M. AGNELLO, F. IAZZI, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, CAPPONI, MARCO, CARBONE, ANGELO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GALLI, DOMENICO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, P. SALVINI, V.I. TRETYAK, V. FILIPPINI, A. FONTANA, P. MONTAGNA, A. PANZARASA, A. ROTONDI, M. BARGIOTTI, A. BERTIN, M. BRUSCHI, M. CAPPONI, A. CARBONE, S. DE CASTRO, L. FABBRI, P. FACCIOLI, D. GALLI, B. GIACOBBE, F. GRIMALDI, U. MARCONI, I. MASSA, M. PICCININI, N. SEMPRINI CESARI, R. SPIGHI, S. VECCHI, M. VILLA, A. VITALE, A. ZOCCOLI, A. BIANCONI, M. CORRADINI, A. DONZELLA, E. LODI RIZZINI, L. VENTURELLI, A. ZENONI, C. CICALÒ, A. DE FALCO, A. MASONI, G. PUDDU, S. SERCI, G. USAI, O.E. GORCHAKOV, S.N. PRAKHOV, A.M. ROZHDESTVENSKY, M.G. SAPOZHNIKOV, M. POLI, P. GIANOTTI, C. GUARALDO, A. LANARO, V. LUCHERINI, C. PETRASCU, D. PANZIERI, F. BALESTRA, M.P. BUSSA, L. BUSSO, P. CERELLO, O. DENISOV, L. FERRERO, A. GRASSO, A. MAGGIORA, F. TOSELLO, E. BOTTA, T. BRESSANI, D. CALVO, F. DE MORI, A. FELICIELLO, A. FILIPPI, S. MARCELLO, M. AGNELLO, and F. IAZZI

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

The spin-parity analysis of the data on the pbar p → 2π+ 2π− annihilation reaction at rest in liquid and in gaseous hydrogen at 3 bar pressure and in flight at p momentum of ~ 50 MeV/c, collected by the Obelix spectrometer at the LEAR complex of CERN, is presented. The relative branching ratios (a1(1260) → σπ)/(a1(1260) → ρπ) = 0.06 ± 0.05 and (π(1300) → σπ)/(π(1300) → ρπ) = 2.2 ± 0.4 are obtained. It is also shown that the inclusion of the exotic meson π1(1400), JPC= 1−+, mass and width M = 1.384 ± 0.028, Γ = 0.378 ± 0.058 GeV/c2, in its decay to ρπ, improves the fit and some implications of these results are briefly discussed. The relative S and P-wave annihilation percentages in four charged pions at two target densities are obtained.

Published
2004

10. Limits for the central production of Theta(+) and Xi(--) pentaquarks in 920-GeV pA collisions

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, G. ZECH, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A.J. SCHWARTZ, A.S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, G. ZECH, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Abstract

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.

Published
2004

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