Search for Single Top Production in $e^{+} e^{-}$ Collisions at $\sqrt{s}$ up to 209 GeV

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RESEARCH PRODUCT

Search for Single Top Production in $e^{+} e^{-}$ Collisions at $\sqrt{s}$ up to 209 GeV

Heister A Aleph Collaboration Schael S Barate R Bruneliere R De Bonis I Decamp D Goy C Jezequel S Lees Jp Martin F Merle E Minard Mn Pietrzyk B Trocme B Boix G Bravo S Casado Mp Chmeissani M Crespo Jm Fernandez E Fernandez Bosman M Garrido L Grauges E Lopez J Martinez M Merino G Pacheco A Paneque D Ruiz H Colaleo A Creanza D De Filippis N De Palma M Iaselli G Maggi G Maggi M Nuzzo S Ranieri A Raso G Ruggieri F Selvaggi G Silvestris L Tempesta P Tricomi A Zito G Huang X Lin J Ouyang Q Wang T Xie Y Xu R Xue S Zhang J Zhang L Zhao W Abbaneo D Azzurri P Barklow T Buchmuller O Cattaneo M Cerutti F Clerbaux B Drevermann H Forty R Frank M Gianotti F Greening Tc Hansen J Harvey J Hutchcroft De Janot P Jost B Kado M Mato P Moutoussi A Ranjard F Schlatter D Sguazzoni G Tejessy W Teubert F Valassi A Videau V Ward Jj Badaud F Dessagne S Falvard A Fayolle D Gay P Jousset J Michel B Monteil S Pallin D Pascolo Jm Perret P Hansen Jd Hansen Jr Hansen Ph Nilsson Bs Kyriakis A Markou C Simopoulou E Vayaki A Zachariadou K Blondel A Brient Jc Machefert F Rouge A Swynghedauw M Tanaka R Videau H Ciulli V Focardi E Parrini G Antonelli A Antonelli M Bencivenni G Bossi F Capon G Chiarella V Laurelli P Mannocchi G Murtas Gp Passalacqua L Kennedy J Lynch Jg Negus P O'shea V Thompson As Wasserbaech S Cavanaugh R Dhamotharan S Geweniger C Hanke P Hepp V Kluge Ee Leibenguth G Putzer A Stenzel H Tittel K Wunsch M Beuselinck R Cameron W Davies G Dornan Pj Girone M Hill Rd Marinelli N Nowell J Rutherford Sa Sedgbeer Jk Thompson Jc White R Ghete Vm Girtler P Kneringer E Kuhn D Rudolph G Bouhova Thacker E Bowdery Ck Clarke Dp Ellis G Finch Aj Foster F Hughes G Jones Rwl Pearson Mr Robertson Na Smizanska M Van Der Aa O Delaere C Lemaitre V Blumenschein U Holldorfer F Jakobs K Kayser F Kleinknecht K Muller As Quast G Renk B Sander Hg Schmeling S Wachsmuth H Zeitnitz C Ziegler T Bonissent A Coyle P Curtil C Ealet A Fouchez D Payre P Tilquin A Ragusa F David A Dietl H Ganis G Huttmann K Lutjens G Manner W Moser Hg Settles R Wolf G Boucrot J Callot O Davier M Duflot L Grivaz Jf Heusse P Jacholkowska A Serin L Veillet Jj De Regie Jbd Yuan C Bagliesi G Boccali T Foa L Giammanco A Giassi A Messineo A Palla F Sanguinetti G Sciaba A Tenchini R Venturi A Verdini P Awunor O Blair Ga Cowan G Garcia Bellido A Green Mg Jones Lt Medcalf T Misiejuk A Strong Ja Teixeira Dias P Clifft Rw Edgecock Tr Norton P Tomalin Ir Bloch Devaux B Boumediene D Colas P Fabbro B Lancon E Lemaire Mc Locci E Perez P Rander J Tuchming B Vallage B Konstantinidis N Litke Am Taylor G Booth Cn Cartwright S Combley F Hodgson P Lehto M Thompson Lf Bohrer A Brandt S Grupen C Hess J Ngac A Prange G Sieler U Borean C Giannini G He H Putz J Rothberg J Armstrong Sr Berkelman K Cranmer K Ferguson Dps Gao Y Gonzalez S Hayes Oj Hu H Jin S Kile J Mcnamara Pa Nielsen J Pan Yb Von Wimmersperg Toeller Jh Wiedenmann W Wu J Wu Sl Wu X Zobernig G Dissertori G Ri Antonelli Antonella/c 6238 2011 Jones Roger/h 5578 2011 Passalacqua Luca/f 5127 2011 O'shea Val/g 1279 2010 Luigi Rolandi Franco Ligabue

subject

Physics Particle physics Nuclear and High Energy Physics Neutral current 010308 nuclear & particles physics Branching fraction Electron–positron annihilation FOS: Physical sciences 01 natural sciences High Energy Physics - Experiment Standard Model Nuclear physics High Energy Physics - Experiment (hep-ex)0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Production (computer science)010306 general physics Particle Physics - Experiment

description

Single top production via the flavour changing neutral current reactions e+e- -> \bar{t}c, \bar{t}u is searched for within the 214 pb-1 of data collected by ALEPH at centre-of-mass energies between 204 and 209 GeV. No deviation from the Standard Model expectation is observed and upper limits on the single top production cross sections are derived. The combination with data collected at lower centre-of-mass energies yields an upper limit on the branching ratio BR(t -> Zc)+BR(t -> Zu) 14%, for BR(t -> ��c)+BR(t -> ��u)= 0 and mt=174 GeV/c2.

year	journal	country	edition	language
2002-09-01

http://hal.in2p3.fr/in2p3-00012288/file/democrite-00012288.pdf