Measurements of the b baryon lifetime

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RESEARCH PRODUCT

Measurements of the b baryon lifetime

Buskulic D Casper D Debonis I Decamp D Ghez P Goy C Lees Jp Minard Mn Odier P Pietrzyk B Ariztizabal F Chmeissani M Crespo Jm Efthymiopoulos I Fernandez E Fernandezbosman M Gaitan V Garrido L Martinez M Orteu S Pacheco A Padilla C Palla F Pascual A Perlas Ja Sanchez F Teubert F Colaleo A Creanza D Depalma M Farilla A Gelao G Girone M Iaselli G Maggi G 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 Cassel D Cattaneo M Comas P Coyle P Drevermann H Engelhardt A Forty Rw Frank M Hagelberg R Harvey J Jacobsen R Janot P Jost B Knobloch J Lehraus I Maggi M Markou C Martin Eb Mato P Meinhard H Minten A Miquel R Oest T Palazzi P Pater Jr Pusztaszeri Jf Ranjard F Rensing P Schlatter D Schmelling M Schneider O Tejessy W Tomalin Ir Venturi A Wachsmuth H Wiedenmann W Wildish T Witzeling W Wotschack J Ajaltouni Z Bardadinotwinowska M Barres A Boyer C Falvard A Gay P Guicheney C Henrard P Jousset J Michel B Monteil S Montret Jc Pallin D Perret P Podlyski F Proriol J Rossignol Jm Saadi F Fearnley T Hansen Jb Hansen Jd Hansen Jr Hansen Ph Nilsson Bs Kyriakis A Simopoulou E Siotis I Vayaki A Zachariadou K Blondel A Bonneaud G Brient Jc Bourdon P Passalacqua L Rouge A Rumpf M Tanaka R Valassi A Verderi M Videau H Candlin Dj Parsons Mi Focardi E Parrini G Corden M Delfino M Georgiopoulos C Jaffe De Antonelli A Bencivenni G Bologna G Bossi F Campana P Capon G Chiarella V Felici G Laurelli P Mannocchi G Murtas F Murtas Gp Pepealtarelli M Dorris Sj Halley Aw Tenhave I Knowles Ig Lynch Jg Morton Wt Oshea V Raine C Reeves P Scarr Jm Smith K Smith Mg Thompson As Thomson F Thorn S Turnbull Rm Becker U Braun O Geweniger C Graefe G Hanke P Hepp V Kluge Ee Putzer A Rensch B Schmidt M Sommer J Stenzel H Tittel K Werner S Wunsch M Beuselinck R Binnie Dm Cameron W Colling Dj Dorman Pj Konstantinidis N Moneta L Moutoussi A Nash J Sanmartin G Sedgbeer Jk Stacey Am Dissertori G Girtler P Kneringer E Kuhn D Rudolph G Bowdery Ck Brodbeck Tj Colrain P Crawford G Finch Aj Foster F Hughes G Sloan T Whelan Ep Williams Mi Galla A Greene Am Kleinknecht K Quast G Raab J Renk B Sander Hg Wanke R Zeitnitz C Aubert Jj Bencheikh Am 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 L Assmann R Bauer C Blum W Brown D Dietl H Dydak F Ganis G Gotzhein C Jakobs K Kroha H Lutjens G Lutz G Manner W Moser Hg Richter R Rosadoschlosser A Settles R Seywerd H Stierlin U Stdenis R Wolf G Alemany R Boucrot J Callot O Cordier A Courault F Davier M Duflot L Grivaz Jf Heusse P Jacquet M Kim Dw Lediberder F Lefrancois J Lutz Am Musolino G Nikolic I Park Hj Park Ic Schune Mh Simion S Veillet Jj Videau I Abbaneo D Azzurri P Bagliesi G Batignani G Bettarini S Bozzi C Calderini G Carpinelli M Ciocci Ma Ciulli V Dellorso R Fantechi R Ferrante I Foa L Forti F Gambino D Giassi A Giorgi Ma Gregorio A Alberto Lusiani Marrocchesi Ps Messineo A Rizzo G Sanguinetti G Sciaba A Spagnolo P Steinberger J Tenchini R Tonelli G Triggiani G Vannini C Verdini Pg Walsh J Betteridge Ap Blair Ga Bryant Lm Cerutti F Gao Y Green Mg Johnson Dl Medcalf T Mir Lm Perrodo P Strong Ja Bertin V Botterill Dr Clifft Rw Edgecock Tr Haywood S Edwards M Maley P Norton Pr Thompson Jc Blochdevaux B Colas P Duarte H Emery S Kozanecki W Lancon E Lemaire Mc Locci E Marx B Perez P Rander J Renardy Jf Rosowsky A Roussarie A Schuller Jp Schwindling J Simohand D A. Trabelsi Vallage B Johnson Rp Kim Hy Litke Am Mcneil Ma Taylor G Beddall A Booth Cn Boswell R Cartwright S Combley F Dawson I Koksal A Letho M Newton Wm Rankin C Thomspon Lf Bohrer A Brandt S Cowan G Feigl E Grupen C Lutters G Minguetrodriguez J Rivera F Saraiva P Smolik L Stephan F Apollonio M Bosisio L Dellamarina R Giannini G Gobbo B Ragusa F Rothberg J Wasserbaech S Armstrong Sr Bellantoni L Elmer P Feng Z Ferguson Dps Gao Ys Gonzalez S Grahl J Harton Jl Hayes Oj Hu H Mcnamara Pa Nachtman Jm Orejudos W Pan Yb Saadi Y Schmitt M Scott Ij Sharma V Turk Jd Walsh Am Wu Sl Wu X Yamartino Jm Zheng M Zobernig G Ri Antonelli Antonella/c 6238 2011 Passalacqua Luca/f 5127 2011 Murtas Fabrizio/b 5729 2012 S.t. Denis Richard/c 8997 2012 Ferrante Isidoro/f 1017 2012 Sanchez Federico/f 5809 2012 Luigi Rolandi Franco Ligabue

subject

Nuclear and High Energy Physics Particle physics Electron–positron annihilation Hadron Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Nuclear physics ALEPH Experiment 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear Experiment 010306 general physics Independent data ALEPH experiment Physics 010308 nuclear & particles physics Physics High Energy Physics::Phenomenology Baryon Mass spectrum High Energy Physics::Experiment Astrophysics::Earth and Planetary Astrophysics Impact parameter Particle Physics - Experiment Lepton

description

Using about 1.5 million hadronic Z decays recorded with the ALEPH detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Lambda l(-) combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is tau(b-baryon) = 1.05(-0.11)(+0.12)(stat) +/-0.09(syst) ps. The lifetime of the Lambda(b)(0) baryon from a maximum likelihood fit to the proper time distribution of 58 Lambda(c)(+)l(-) candidates containing a Lambda(b)(0) sample of 44 decays, is tau(Lambda b0) = 1.02(-0.18)(+0.23)(stat) +/- 0.06(syst) ps.

year	journal	country	edition	language
1995-01-01

10.1016/0370-2693(95)00980-y http://hdl.handle.net/10281/390312