/ Experiment-HEP hep-ex/0612063


Search for the exotic Theta+ resonance in the NOMAD experiment


Samoylov, O. ; Naumov, D. ; Cavasinni, V. ; Astier, P. ; Autiero, D. ; Baldisseri, A. ; Baldo-Ceolin, M. ; Banner, M. ; Bassompierre, G. ; Benslama, K. ; Besson, N. ; Bird, I. ; Blumenfeld, Barry J. ; Bobisut, F. ; Bouchez, J. ; Boyd, S. ; Bueno, A. ; Bunyatov, S. ; Camilleri, L. ; Cardini, A. ; Cattaneo, P.W. ; Cervera-Villanueva, A. ; Challis, R. ; Chukanov, A. ; Collazuol, G. ; Conforto, G. ; Conta, a C. ; Contalbrigo, M. ; Cousins, R. ; Daniels, D. ; Degaudenzi, H. ; Del Prete, T. ; De Santo, A. ; Dignan, T. ; Di Lella, L. ; do Couto e Silva, E. ; Dumarchez, J. ; Ellis, Malcolm ; Feldman, G.J. ; Ferrari, R. ; Ferrere, D. ; Flaminio, V. ; Fraternali, M. ; Gaillard, J.-M. ; Gangler, E. ; Geiser, A. ; Geppert, D. ; Gibin, D. ; Gninenko, S. ; Godley, A. ; Gomez-Cadenas, J.-J. ; Gosset, J. ; Gossling, C. ; Gouanere, M. ; Grant, A. ; Graziani, G. ; Guglielmi, A. ; Hagner, C. ; Hernando, J. ; Hubbard, D. ; Hurst, P. ; Hyett, N. ; Iacopini, E. ; Joseph, C. ; Juget, F. ; Kent, N. ; Kirsanov, M. ; Klimov, O. ; Kokkonen, J. ; Kovzelev, A. ; Krasnoperov, A. ; Lacaprara, S. ; Lachaud, C. ; Lakic, B. ; Lanza, A. ; Rotonda, L.La ; Laveder, M. ; Letessier-Selvon, A. ; Levy, J.-M. ; Linssen, L. ; Ljubicic, A. ; Long, J. ; Lupi, A. ; Lyubushkin, V. ; Marchionni, A. ; Martelli, F. ; Mechain, X. ; Mendiburu, J.-P. ; Meyer, J.-P. ; Mezzetto, M. ; Mishra, S.R. ; Moorhead, G.F. ; Nedelec, P. ; Nefedov, Yu. ; Nguyen-Mau, C. ; Orestano, D. ; Pastore, F. ; Peak, L.S. ; Pennacchio, E. ; Pessard, H. ; Petti, R. ; Placci, A. ; Polesello, G. ; Pollmann, D. ; Polyarush, A. ; Poulsen, C. ; Popov, B. ; Rebuffi, L. ; Rico, J. ; Riemann, P. ; Roda, C. ; Rubbia, A. ; Salvatore, F. ; Schahmaneche, K. ; Schmidt, B. ; Schmidt, T. ; Sconza, A. ; Sevior, M. ; Sillou, D. ; Soler, F.J.P. ; Sozzi, G. ; Steele, D. ; Stiegler, U. ; Stipcevic, M. ; Stolarczyk, Th. ; Tareb-Reyes, M. ; Taylor, G.N. ; Tereshchenko, V. ; Toropin, A. ; Touchard, A.-M. ; Tovey, S.N. ; Tran, M.-T. ; Tsesmelis, E. ; Ulrichs, J. ; Vacavant, L. ; Valdata-Nappi, M. ; Valuev, V. ; Vannucci, F. ; Varvell, K.E. ; Veltri, M. ; Vercesi, V. ; Vidal-Sitjes, G. ; Vieira, J.-M. ; Vinogradova, T. ; Weber, F.V. ; Weisse, T. ; Wilson, F.F. ; Winton, L.J. ; Yabsley, Bruce D. ; Zaccone, H. ; Zuber, K. ; Zuccon, P.

Published in: Eur.Phys.J.
Year: 2007
Vol.: C49
Page No: 499-510
Pages: 25

Abstract: A search for exotic Theta baryon via Theta -> proton +Ks decay mode in the NOMAD muon neutrino DIS data is reported. The special background generation procedure was developed. The proton identification criteria are tuned to maximize the sensitivity to the Theta signal as a function of xF which allows to study the Theta production mechanism. We do not observe any evidence for the Theta state in the NOMAD data. We provide an upper limit on Theta production rate at 90% CL as 2.13 per 1000 of neutrino interactions.

Keyword(s): neutrino interactions ; strange particles ; exotic baryons ; pentaquarks

Web-Page: http://publish.edpsciences.org/abstract/EPJC/V49/P499

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