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A study of the decay width difference in the $B^{0}_{s}-\overline{B}^{ 0}_{s}$ system using $\phi\phi$ correlations

R. Barate 1 D. Decamp 1 P. Ghez 1 C. Goy 1 J P. Lees 1 E. Merle 1 M N. Minard 1 B. Pietrzyk 1 R. Alemany S. Bravo M P. Casado M. Chmeissani J M. Crespo E. Fernandez M. Fernandez-Bosman L. Garrido E. Graughs M. Martmnez G. Merino R. Miquel L M. Mir A. Pacheco H. Ruiz A. Colaleo D. Creanza M. de Palma G. Iaselli G. Maggi M. Maggi S. Nuzzo A. Ranieri G. Raso F. Ruggieri G. Selvaggi L. Silvestris P. Tempesta A. Tricomi G. Zito X. Huang Jiali Lin Q. Ouyang T. Wang Y. Xie R. Xu S. Xue J. Zhang L. Zhang W. Zhao D. Abbaneo G. Boix M. Cattaneo F. Cerutti G. Dissertori H. Drevermann R W. Forty M. Frank T C. Greening a W. Halley J B. Hansen J. Harvey P. Janot B. Jost I. Lehraus P. Mato A. Minten A. Moutoussi F. Ranjard L. Rolandi D. Schlatter M. Schmitt O. Schneider P. Spagnolo W. Tejessy F. Teubert E. Tournefier a E. Wright Ziad Ajaltouni 2 F. Badaud 2 G. Chazelle 2 O. Deschamps 2 Alain Falvard 2 Pascal Gay 2 C. Guicheney 2 Pierre Henrard 2 J. Jousset 2 B. Michel 2 S. Monteil 2 Jean-Claude Montret 2 D. Pallin 2 Pascal Perret 2 F. Podlyski 2 J D. Hansen J R. Hansen P H. Hansen B S. Nilsson A. Wddndnen G. Daskalakis A. Kyriakis C. Markou E. Simopoulou A. Vayaki A. Blondel 3 G. Bonneaud 3 J C. Brient 3 A. Rougi 3 M. Rumpf 3 M. Swynghedauw M. Verderi H. Videau 3 E. Focardi G. Parrini K. Zachariadou A. Antonelli G. Bencivenni G. Bologna F. Bossi P. Campana G. Capon V. Chiarella P. Laurelli G. Mannocchi F. Murtas G P. Murtas L. Passalacqua M. Pepi-Altarelli J G. Lynch P. Negus V. O'Shea C. Raine P. Teixeira-Dias a S. Thompson R. Cavanaugh S. Dhamotharan C. Geweniger P. Hanke G. Hansper V. Hepp E E. Kluge A. Putzer J. Sommer K. Tittel S. Werner M. Wunsch R. Beuselinck D M. Binnie W. Cameron P J. Dornan M. Girone N. Marinelli J K. Sedgbeer J C. Thompson E. Thomson V M. Ghete P. Girtler E. Kneringer D. Kuhn G. Rudolph C K. Bowdery P G. Buck a J. Finch F. Foster G. Hughes R W L. Jones N A. Robertson I. Giehl K. Jakobs K. Kleinknecht G. Quast B. Renk E. Rohne H G. Sander H. Wachsmuth C. Zeitnitz A. Bonissent 4 J. Carr 4 P. Coyle 4 O. Leroy 4 P. Payre 4 D. Rousseau 4 M. Talby 4 M. Aleppo M. Antonelli F. Ragusa H. Dietl G. Ganis C. Mannert W. Mdnner H G. Moser S. Schael R. Settles H. Stenzel W. Wiedenmann G. Wolf P. Azzurri 5 J. Boucrot 5 O. Callot 5 S. Chen 5 A. Cordier 5 M. Davier 5 L. Duflot 5 J F. Grivaz 5 P. Heusse 5 A. Jacholkowska 5 F. Le Diberder 5 J. Lefrangois 5 a M. Lutz 5 M H. Schune 5 J J. Veillet 5 I. Videau 5 D. Zerwas 5 G. Bagliesi T. Boccali G. Calderini V. Ciulli A. Giassi F. Ligabue A. Messineo F. Palla G. Rizzo G. Sanguinetti G. Sguazzoni R. Tenchini A. Venturi P G. Verdini G A. Blair G. Cowan M G. Green T. Medcalf J A. Strong R W. Clifft T R. Edgecock P R. Norton I R. Tomalin B. Bloch-Devaux P. Colas S. Emery W. Kozanecki E. Langon M C. Lemaire E. Locci P. Pirez J. Rander J F. Renardy A. Roussarie J P. Schuller J. Schwindling A. Trabelsi B. Vallage S N. Black J H. Dann R P. Johnson H Y. Kim N. Konstantinidis a M. Litke M A. Mcneil G. Taylor C N. Booth S. Cartwright F. Combley M. Lehto L F. Thompson K. Affholderbach A. Bvhrer S. Brandt C. Grupen A. Misiejuk G. Prange U. Sieler G. Giannini B. Gobbo J E. Rothberg S. Wasserbaech S R. Armstrong P. Elmer D P S. Ferguson Y. Gao S. Gonzalez O J. Hayes H. Hu S. Jin J. Kile P A. Mcnamara J. Nielsen W. Orejudos y B. Pan Y. Saadi I J. Scott J. Walsh J H. von Wimmersperg-Toeller Lan. Wu Sau X. Wu G. Zobernig
Abstract : In a data sample of about four million hadronic Z decays recorded with the ALEPH detector from 1991 to 1995, the $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ decay is observed, based on tagging the nal state with two $\phi$ mesons in the same hemisphere. The $D^{(*)+}_{s}D^{(*)-} _{s}$ final state is mostly CP even and corresponds to the short-lived $B^0$ mass eigenstate. The branching ratio of this decay is measured to be BR$(B^{0}_{s}(short) \to D^{(*)+}_{s}D^{(*)-}_{s}) = (23\pm 10^{+19}_{-9})%$. A measurement of the lifetime of the $B^0$(short) gives 1.27$\pm$ 0.33$\pm$ 0.07 ps. The lifetime and branching ratio measurements allow two essentially independent estimates to be made of the relative decay width difference $\Delta\Gamma/\Gamma$ in the $B^{0}_{s}-\overline{B}^{0}_{s}$ system, corresponding to an average value $\Delta\Gamma/\Gamma = (25^{+21}_{-14})%.
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Submitted on : Friday, August 18, 2000 - 2:19:57 PM
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  • HAL Id : in2p3-00005330, version 1

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R. Barate, D. Decamp, P. Ghez, C. Goy, J P. Lees, et al.. A study of the decay width difference in the $B^{0}_{s}-\overline{B}^{ 0}_{s}$ system using $\phi\phi$ correlations. Physics Letters B, Elsevier, 2000, 486, pp.286-299. ⟨in2p3-00005330⟩

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