Search for pentaquark states in Z decays

Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. At 95% C.L., upper limits are set on the production rates N of such particles and their charge-conjugate state per Z decay: N/sub Theta (1...

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Detalles Bibliográficos
Autores principales: Schael, S, Abbaneo, D, Antonelli, A, Antonelli, M, Armstrong, S R, Awunor, O, Azzurri, R, Badaud, F, Bagliesi, G, Barate, R, Barklow, T, Bencivenni, G, Berkelman, K, Beuselinck, R, Blair, G A, Bloch-Devaux, B, Blondel, A, Blumenschein, U, Boccali, T, Böhrer, A, Bonissent, A, Booth, C N, Borean, C, Bossi, R, Boucrot, J, Bouhova-Thacker, E, Boumediene, D E, Bowdery, C K, Brandt, S, Bravo, S, Brient, J C, Brunelière, R, Buchmiiller, O, Callot, O, Cameron, W, Capon, G, Cartwright, S, Casado, M P, Cattaneo, M, Cavanaugh, R J, Cerutti, F, Chiarella, V, Chmeissani, M, Ciulli, V, Clarke, D R, Clerbaux, B, Clifft, R W, Colaleo, A, Colas, R, Combley, F, Cowan, G, Coyle, P, Cranmer, K, Creanza, D, Crespo, J M, Curtil, C, David, A, Davier, M, Davies, G, De Bonis, I, De Filippis, N, Décamp, D, Delaere, C, Dessagne, S, Dhamotharan, S, Dietl, H, Dissertori, G, Doman, P J, Drevermann, H, Duflot, L, Ealet, A, Edgecock, T R, Ellis, G, Fabbro, B, Falvard, A, Fayolle, D, Ferguson, D R S, Fernández-Bosman, M, Fernández, E, Finch, A J, Foà, L, Focardi, E, Forty, R W, Foster, E, Fouchez, D, Frank, M, Ganis, G, Gao, Y, García-Bellido, A, Garrido, L, Gay, P, Geweniger, C, Ghete, V M, Giammanco, A, Giannini, G, Giariotti, R, Giassi, A, Girone, M, Girtler, P, González, S, Goy, C, Green, M G, Grivaz, J E, Grupen, C, Hanke, P, Hansen, J B, Hansen, J D, Hansen, J R, Hansen, P H, Harvey, J, Hayes, O J, He, H, Hepp, V, Hess, J, Heusse, P, Hodgson, R N, Hrolldorfer, E, Hu, H, Huang, X, Hughes, G, Hutchcroft, D E, Hüttmann, K, Iaselli, G, Jacholkowska, A, Jakobs, K, Janot, P, Jézéquel, S, Jin, S, Jones, R W L, Jost, B, Jousset, J, Kadp, M, Kayser, E, Kennedy, J, Kile, J, Kleinknecht, K, Kluge, E E, Kneringer, E, Kraan, A C, Kuhn, D, Kyriakis, A, Lançon, E, Laurelli, P, Lees, J P, Lehto, M H, Leibenguth, G, Lemaire, M C, Lemaître, V, Ligabue, E, Lin, J, Litke, A M, Locci, E, Lütjens, G, Lynch, J G, Machefert, F, Maggi, G, Maggi, M, Männer, W, Mannocchi, G, Marinelli, N, Markou, C, Martin, R, Martínez, M, Mato, P, McNamara, P A, Medcalf, T, Merle, E, Messineo, A, Michel, B, Minard, M N, Misiejuk, A, Monteil, S, Moser, H G, Moutoussi, A, Müller, A S, Murtas, G P, Negus, P, Ngac, A, Nielsen, J, Nilsson, B S, Norton, R R, Nowell, J, Nuzzo, S, O'Shea, V, Ouyang, Q, Pacheco, A, Palla, E, Pallin, D, Pan, Y B, Parrini, G, Pascolo, J M, Passalacqua, L, Payre, R, Pearson, M R, Pérez, R, Perret, P, Pietrzyk, B, Prange, G, Pütz, J, Putzer, A, Ragusa, E, Rander, J, Ranieri, A, Ranjard, R, Raso, G, Renk, B, Robertson, N A, Rolandi, Luigi, Rothberg, J E, Rougé, A, Rudolph, G, Ruggieri, R, Ruiz, H, Rutherford, S A, Sander, H G, Sanguinetti, G, Schlatter, W D, Schmeling, S, Sciabà, A, Sedgbeer, J K, Selvaggi, G, Serin, L, Settles, R, Sguazzoni, G, Silvestris, L, Simopoulou, E, Smizanska, M, Spagnolo, R, Stenzel, H, Strong, J A, Taylor, G, Teixeira-Dias, P, Tempesta, P, Tenchini, R, Teubert, R, Thompson, A S, Thompson, J C, Thompson, L F, Tilquin, A, Tittel, K, Tomalin, I R, Tricomi, A, Trocmé, B, Tuchming, B, Valassi, A, Vallage, B, Vayaki, A, Veillet, J J, Venturi, A, Verdini, R G, Videau, H L, Videau, I, Villegas, M, Wachsmuth, H W, Wang, T, Ward, J J, Wasserbaech, S R, White, R, Wiedenmann, W, Wolf, G, Wu, J, Wu, S L, Wu, X, Wunsch, M, Xie, Y, Xu, R, Xue, S, Zachariadou, K, Zeitnitz, C, Zhang, J, Zhang, L, Zhao, W, Ziegler, T, Zito, G, Zobernig, G, De Palma, M, van der Aa, O, Von Wimmersperg-Töller, J H
Lenguaje:eng
Publicado: 2004
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2004.08.021
http://cds.cern.ch/record/909084
Descripción
Sumario:Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. At 95% C.L., upper limits are set on the production rates N of such particles and their charge-conjugate state per Z decay: N/sub Theta (1535)+/.BR( Theta (1535)/sup +/ to pK /sub S//sup 0/)<6.2*10/sup -4/, N/sub Xi (1862)--/.BR( Xi (1862)/sup --/ to Xi /sup -/ pi /sup -/)<4.5$0 M10/sup -4/, N/sub Xi (1862)0/.BR ( Xi (1862)/sup 0/ to Xi /sup -/ pi /sup +/)<8.9*10/sup -4/, N/sub Theta c/(3100)/sup 0/.BR( Theta /sub c/(3100)/sup 0/ to D/sup *-/p) <6.3*10/sup -4/, N/sub Theta c/(3100)/sup 0/.BR( Theta /sub c/(3100) /sup 0/ to D/sup -/p)<31*10/sup -4/.

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