학술논문

Production of excited beauty states inZ decays
Document Type
Original Paper
Author
Buskulic, D.Casper, D.De Bonis, I.Decamp, D.Ghez, P.Goy, C.Lees, J. -P.Lucotte, A.Minard, M. -N.Odier, P.Pietrzyk, B.Ariztizabal, F.Chmeissani, M.Crespo, J. M.Efthymiopoulos, I.Fernandez, E.Fernandez-Bosman, M.Gaitan, V.Garrido, LlMartinez, M.Orteu, S.Pacheco, A.Padilla, C.Palla, F.Pascual, A.Perlas, J. A.Sanchez, F.Teubert, F.Colaleo, A.Creanza, D.de Palma, M.Farilla, A.Gelao, G.Girone, M.Iaselli, G.Maggi, G.Maggi, M.Marinelli, N.Natali, S.Nuzzo, S.Ranieri, A.Raso, G.Romano, F.Ruggieri, F.Selvaggi, G.Silvestris, L.Tempesta, P.Zito, G.Huang, X.Lin, J.Ouyang, Q.Wang, T.Xie, Y.Xu, R.Xue, S.Zhang, J.Zhang, L.Zhao, W.Bonvicini, G.Cattaneo, M.Comas, P.Coyle, P.Drevermann, H.Engelhardt, A.Forty, R. W.Frank, M.Hagelberg, R.Harvey, J.Jacobsen, R.Janot, P.Jost, B.Knobloch, J.Lehraus, I.Markou, C.Martin, E. B.Mato, P.Meinhard, H.Minten, A.Miquel, R.Oest, T.Palazzi, P.Pater, J. R.Pusztaszeri, J. -F.Ranjard, F.Rensing, P.Rolandi, L.Schlatter, D.Schmelling, M.Schneider, O.Tejessy, W.Tomalin, I. R.Venturi, A.Wachsmuth, H.Wiedenmann, W.Wildish, T.Witzeling, W.Wotschack, J.Ajaltouni, Z.Bardadin-Otwinowska, M.Barres, A.Boyer, C.Falvard, A.Gay, P.Guicheney, C.Henrard, P.Jousset, J.Michel, B.Monteil, S.Montret, J -C.Pallin, D.Perret, P.Podlyski, F.Proriol, J.Rossignol, J. -M.Saadi, F.Fearnley, T.Hansen, J. B.Hansen, J. D.Hansen, J. R.Hansen, P. H.Nilsson, B. S.Kyriakis, A.Simopoulou, E.Siotis, I.Vayaki, A.Zachariadou, K.Blondel, A.Bonneaud, G.Brient, J. C.Bourdon, P.Passalacqua, L.Rougé, A.Rumpf, M.Tanaka, R.Valassi, A.Verderi, M.Videau, H.Candlin, D. J.Parsons, M. I.Focardi, E.Parrini, G.Corden, M.Delfino, M.Georgiopoulos, C.Jaffe, D. E.Antonelli, A.Bencivenni, G.Bologna, G.Bossi, F.Campana, P.Capon, G.Chiarella, V.Felici, G.Laurelli, P.Mannocchi, G.Murtas, F.Murtas, G. P.Pepe-Altarelli, M.Dorris, S. J.Halley, A. W.ten Have, I.Knowles, I. G.Lynch, J. G.Morton, W. T.O’Shea, V.Raine, C.Reeves, P.Scarr, J. M.Smith, K.Smith, M. G.Thompson, A. S.Thomson, F.Thorn, S.Turnbull, R. M.Becker, U.Braun, O.Geweniger, C.Graefe, G.Hanke, P.Hepp, V.Kluge, E. E.Putzer, A.Rensch, B.Schmidt, M.Sommer, J.Stenzel, H.Tittel, K.Werner, S.Wunsch, M.Beuselinck, R.Binnie, D. M.Cameron, W.Colling, D. J.Dornan, P. J.Konstantinidis, N.Moneta, L.Moutoussi, A.Nash, J.San Martin, G.Sedgbeer, J. K.Stacey, A. M.Dissertori, G.Girtler, P.Kneringer, E.Kuhn, D.Rudolph, G.Bowdery, C. K.Brodbeck, T. J.Colrain, P.Crawford, G.Finch, A. J.Foster, F.Hughes, G.Sloan, T.Whelan, E. P.Williams, M. I.Galla, A.Greene, A. M.Kleinknecht, K.Quast, G.Raab, J.Renk, B.Sander, H. -G.Wanke, R.Zeitnitz, C.Aubert, J. J.Bencheikh, A. M.Benchouk, C.Bonissent, A.Bujosa, G.Calvet, D.Carr, J.Diaconu, C.Etienne, F.Thulasidas, M.Nicod, D.Payre, P.Rousseau, D.Talby, M.Abt, I.Assmann, R.Bauer, C.Blum, W.Brown, D.Dietl, H.Dydak, F.Ganis, G.Gotzhein, C.Jakobs, K.Kroha, H.Lütjens, G.Lutz, G.Männer, W.Moser, H. -G.Richter, R.Rosado-Schlosser, A.Schael, S.Settles, R.Seywerd, H.Stierlin, U.St. Denis, R.Wolf, G.Alemany, R.Boucrot, J.Callot, O.Cordier, A.Courault, F.Davier, M.Duflot, L.Grivaz, J. -F.Heusse, PhJacquet, M.Kim, D. W.Le Diberder, F.Lefrançois, J.Lutz, A. -M.Musolino, G.Nikolic, I.Park, H. J.Park, I. C.Schune, M. -H.Simion, S.Veillet, J. -J.Videau, I.Abbaneo, D.Azzurri, P.Bagliesi, G.Batignani, G.Bettarini, S.Bozzi, C.Calderini, G.Carpinelli, M.Ciocci, M. A.Ciulli, V.Dell’Orso, R.Fantechi, R.Ferrante, I.Foà, L.Forti, F.Giassi, A.Giorgi, M. A.Gregorio, A.Ligabue, F.Lusiani, A.Marrocchesi, P. S.Messineo, A.Rizzo, G.Sanguinetti, G.Sciabà, A.Spagnolo, P.Steinberger, J.Tenchini, R.Tonelli, G.Triggiani, G.Vannini, C.Verdini, P. G.Walsh, J.Betteridge, A. P.Blair, G. A.Bryant, L. M.Cerutti, F.Gao, Y.Green, M. G.Johnson, D. L.Medcalf, T.Mir, Ll M.Perrodo, P.Strong, J. A.Bertin, V.Botterill, D. R.Clifft, R. W.Edgecock, T. R.Haywood, S.Edwards, M.Maley, P.Norton, P. R.Thompson, J. C.Bloch-Devaux, B.Colas, P.Duarte, H.Emery, S.Kozanecki, W.Lançon, E.Lemaire, M. C.Locci, E.Marx, B.Perez, P.Rander, J.Renardy, J. -F.Rosowsky, A.Roussarie, A.Schuller, J. -P.Schwindling, J.Si Mohand, D.Trabelsi, A.Vallage, B.Johnson, R. P.Kim, H. Y.Litke, A. M.McNeil, M. A.Taylor, G.Beddall, A.Booth, C. N.Boswell, R.Cartwright, S.Combley, F.Dawson, I.Koksal, A.Letho, M.Newton, W. M.Rankin, C.Thompson, L. F.Böhrer, A.Brandt, S.Cowan, G.Feigl, E.Grupen, C.Lutters, G.Minguet-Rodriguez, J.Rivera, F.Saraiva, P.Smolik, L.Stephan, F.van Gemmeren, P.Apollonio, M.Bosisio, L.Della Marina, R.Giannini, G.Gobbo, B.Ragusa, F.Rothberg, J.Wasserbaech, S.Armstrong, S. R.Bellantoni, L.Elmer, P.Feng, Z.Ferguson, D. P. S.Gao, Y. S.González, S.Grahl, J.Harton, J. L.Hayes, O. J.Hu, H.McNamara, P. A.Nachtman, J. M.Orejudos, W.Pan, Y. B.Saadi, Y.Schmitt, M.Scott, I. J.Sharma, V.Turk, J. D.Walsh, A. M.Wu, Sau LanWu, X.Yamartino, J. M.Zheng, M.Zobernig, G.ALEPH Collaboration
Source
Zeitschrift für Physik C Particles and Fields. December 1995 69(3):393-404
Subject
Language
English
ISSN
0170-9739
1431-5858
Abstract
A data sample of about 3.0 million hadronicZ decays collected by the ALEPH experiment at LEP in the years 1991 through 1994 is used to make an inclusive selection of B hadron events. In this event sample 4227±140±252B* mesons in the decayB*→Bγ and 1944±108±161B**u,d mesons decaying into a B meson and a charged pion are reconstructed. Here and in the followingB**u,d denotes the eightL=1(bū) and (bd) states and their charge conjugate.For the well establishedB* meson the following quantities are obtained:ΔM=MB*−MB=(45.30±0.35±0.87) MeV/c2 andNB*/(NB+NB*)=(77.1±2.6±7.0)%. The angular distribution of the photons in theB* rest frame is used to measure the relative contribution of longitudinalB* polarization states to beσL/(σLT)=(33±6±5)%.In theM(Bπ)−M(B) mass difference resonance structure is observed at (424±4±10) MeV/c2, for which the shape and position is consistent with the expectation forB**u,d states decaying intoB(*)π±. The relative production rate is determined to be$$\begin{gathered} \frac{{BR(Z \to b \to B_{u,d}^{ * * } )}}{{BR(Z \to b \to B_{u,d} )}} \hfill \\ = [27.9 \pm 1.6(stat) \pm 5.9(syst) {}_{ - 5.6}^{ + 3.9} (model)]\% \hfill \\ \end{gathered} $$ where the third error reflects the uncertainty due to different production and decay models for the broadB**u,d states.