Heavy Flavor Production and Decay With Prompt Leptons In the Aleph Detector

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RESEARCH PRODUCT

Heavy Flavor Production and Decay With Prompt Leptons In the Aleph Detector

Buskulic D Casper D Debonis I Decamp D Ghez P Goy C Lees Jp Minard Mn Odier P Pietrzyk B Ariztizabal F Comas P Crespo Jm Efthymiopoulos I Fernandez E Fernandezbosman M Gaitan V Garrido L Martinez M Mattison T Ortreu S Pacheco A Padilla C Pascual A Creanza D Depalma M Farilla A 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 Chai Y Huang D Huang X Lin J Wang T Xie Y Xu D Xu R Zhang J Zhang L Zhao W Bonvicini G Boudreau J Drevermann H Forty Rw Ganis G Gay C Girone M Hagelberg R Harvey J Hilgart J Jacobsen R Jost B Knobloch J Lehraus I Maggi M Markou C Mato P Meinhard H Minten A Miquel R Palazzi P Pater Jr Perlas Ja Perrodo P Pusztaszeri Jf Ranjard F Rothberg J Ruan T Saich M Schlatter D Schmelling M Sefkow F Tejessy W Tomalin Ir Veenhof R Wachsmuth H Wasserbaech S 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 Montret Jc Pallin D Perret P Podlyski F Proriol J Saadi F Fearnley T Hansen Jb Hansen Jd Hansen Jr Hansen Ph Johnson Sd Mollerud R Nilsson Bs Kyriakis A Simopoulou E Siotis I Vayaki A Zachariadou K Badier J Blondel A Bonneaud G Brient Jc Bourdon B Fouque G Passalacqua L Rouge A Rumpf M Tanaka R Verderi M Videau H Candlin Dj Parsons Mi Veitch E Focardi E Moneta L Parrini G Corden M Delfino M Georgiopoulos C Jaffe De Levinthal D Antonelli A Bencivenni G Bologna G Bossi F Campana P Capon G Cerutti F Chiarella V Felici G Laurelli P Mannocchi G Murtas F Murtas Gp Pepealtarelli M Salomone S Colrain P Tenhave I Knowles Ig Lynch Jg Maitland W Morton Wt Raine C Reeves P Scarr Jm Smith K Smith Mg Thompson As Thorn S Turnbull Rm Becker U Braun O Geweniger C Hanke P Hepp V Kluge Ee Putzer A Rensch B Schmidt M Stenzel H Tittel K Wunsch M Beuselinck R Binnie Dm Cameron W Cattaneo M Colling Dj Dornan Pj Hassard Jf Konstantinidis N Moutoussi A Nash J Payne Dg Sanmartin G Sedgbeer Jk Wright Ag Girtler P Kuhn D Rudolph G Vogl R Bowdery Ck Brodbeck Tj Finch Aj Foster F Hughes G Jackson D Keemer Nr Nuttall M Patel A Sloan T Snow Sw Whelan Ep Galla A Greene Am Kleinknecht K Raab J Renk B Sander Hg Schmidt H Walther Sm Wanke R Wolf B Bencheikh Am Benchouk C Bonissent A Calvet D Carr J Coyle P Diaconu C Etienne F Nicod D Payre P Roos L Rousseau D Schwemling P Talby M Adlung S Assmann R Bauer C Blum W Brown D Cattaneo P Dehning B Dietl H Dydak F Frank M Halley Aw Jakobs K Lauber J Lutjens G Lutz G Manner W Moser Hg Richter R Schroder J Schwarz As Settles R Seywerd H Stierlin U Stiegler U Stdenis R Wolf G Alemany R Boucrot J Callot O Cordier A Davier M Duflot L Grivaz Jf Heusse P Janot P Kim Dw Lediberder F Lefrancois J Lutz Am Musolino G Schune Mh Veillet Jj Videau I Abbaneo D Bagliesi G Batignani G Bottigli U Bozzi C Calderini G Carpinelli M Ciocci Ma Ciulli V Dellorso R Ferrante I Fidecaro F Foa L Forti F Giassi A Giorgi Ma Gregorio A Alberto Lusiani Marrocchesi Ps Martin Eb Messineo A Palla F Rizzo G Sanguinetti G Spagnolo P Steinberger J Tenchini R Tonelli G Triggiani G Valassi A Vannini C Venturi A Verdini Pg Walsh J Betteridge Ap Gao Y Green Mg Johnson Dl March Pv Medcalf T Mir Lm Quazi Is Strong Ja Bertin V Botterill Dr Clifft Rw Edgecock Tr Haywood S Edwards M 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 Mohand Ds Vallage B Johnson Rp Litke Am Taylor G Wear J Babbage W Booth Cn Buttar C Cartwright S Combley F Dawson I Thompson Lf Bohrer A Brandt S Cowan G Feigl E Grupen C Lutters G Minguetrodriguez J Rivera F Saraiva P Schafer U Smolik L Bosisio L Dellamarina R Giannini G Gobbo B Pitis L Ragusa F Bellantoni L Chen W Conway Js Feng Z Ferguson Dps Gao Ys Grahl J Harton Jl Hayes Oj Hu H Nachtman Jm Pan Yb Saadi Y Schmitt M Scott I Sharma V Turk Jd Walsh Am Weber Fv Wu Sl Wu X Yamartino Jm Zheng M Zobernig G Ri Antonelli Antonella/c 6238 2011 Buttar Craig/d 3706 2011 Passalacqua Luca/f 5127 2011 Murtas Fabrizio/b 5729 2012 S.t. Denis Richard/c 8997 2012 Ferrante Isidoro/f 1017 2012 Luigi Rolandi Franco Ligabue

subject

Quark Particle physics Physics and Astronomy (miscellaneous)Elementary particle heavy flavour 01 natural sciences ALEPH Experiment Nuclear physics 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Information retrieval 010306 general physics Engineering (miscellaneous)ALEPH experiment Quantum chromodynamics Physics kwnoledge organisation Muon 010308 nuclear & particles physics Branching fraction ALEPH Experiment; LEP; heavy flavour serendipity Weinberg angle LEP ALEPH detector Particle Physics - Experiment Lepton

description

In 431 000 hadronicZ decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of $$b\bar b$$ and $$c\bar c$$ events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at theZ mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR $$(b \to \ell ^ - \bar vX)$$ and BR (b→cl+ vX) yield 0.114±0.003±0.004 and 0.082±0.003±0.012, respectively. The dilepton events enable measurement of theb mixing parameter, Χ=0.114±0.014±0.008. Results are also presented for the energy variation of the $$b\bar b$$ asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2θ eff =0.2333±0.0022.

year	journal	country	edition	language
1994-01-01

10.1007/bf01560237 http://hdl.handle.net/11568/828866