Searches for scalar top and scalar bottom quarks at LEP2

6533b838fe1ef96bd12a3c72

RESEARCH PRODUCT

Searches for scalar top and scalar bottom quarks at LEP2

R. Barate D. Buskulic D. Decamp P. Ghez C. Goy J.-p. Lees A. Lucotte M.-n. Minard J.-y. Nief B. Pietrzyk M.p. Casado M. Chmeissani P. Comas J.m. Crespo M. Delfino E. Fernandez M. Fernandez-bosman Ll. Garrido A. Juste M. Martinez G. Merino R. Miquel Ll.m. Mir C. Padilla I.c. Park A. Pascual J.a. Perlas I. Riu F. Sanchez F. Teubert A. Colaleo D. Creanza M. De Palma G. Gelao G. Iaselli G. Maggi M. Maggi N. Marinelli S. Nuzzo A. Ranieri G. Raso F. Ruggieri G. Selvaggi L. Silvestris P. Tempesta A. Tricomi G. Zito X. Huang J. Lin Q. Ouyang T. Wang Y. Xie R. Xu S. Xue J. Zhang L. Zhang W. Zhao D. Abbaneo R. Alemany A.o. Bazarko U. Becker P. Bright-thomas M. Cattaneo F. Cerutti G. Dissertori H. Drevermann R.w. Forty M. Frank R. Hagelberg J.b. Hansen J. Harvey P. Janot B. Jost E. Kneringer J. Knobloch I. Lehraus P. Mato A. Minten L. Moneta A. Pacheco J.-f. Pusztaszeri F. Ranjard G. Rizzo L. Rolandi D. Rousseau D. Schlatter M. Schmitt O. Schneider W. Tejessy I.r. Tomalin H. Wachsmuth A. Wagner Z. Ajaltouni A. Barrès C. Boyer A. Falvard C. Ferdi P. Gay C. Guicheney P. Henrard J. Jousset B. Michel S. Monteil J-c. Montret D. Pallin P. Perret F. Podlyski J. Proriol P. Rosnet J.-m. Rossignol T. Fearnley J.d. Hansen J.r. Hansen P.h. Hansen B.s. Nilsson B. Rensch A. Wäänänen G. Daskalakis A. Kyriakis C. Markou E. Simopoulou A. Vayaki A. Blondel J.c. Brient F. Machefert A. Rougé M. Rumpf A. Valassi H. Videau E. Focardi G. Parrini K. Zachariadou R. Cavanaugh M. Corden C. Georgiopoulos T. Huehn D.e. Jaffe A. Antonelli G. Bencivenni G. Bologna F. Bossi P. Campana G. Capon D. Casper V. Chiarella G. Felici P. Laurelli G. Mannocchi F. Murtas G.p. Murtas L. Passalacqua M. Pepe-altarelli L. Curtis S.j. Dorris A.w. Halley I.g. Knowles J.g. Lynch V. O'shea C. Raine J.m. Scarr K. Smith P. Teixeira-dias A.s. Thompson E. Thomson F. Thomson R.m. Turnbull O. Buchmüller S. Dhamotharan C. Geweniger G. Graefe 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 S. Goodsir E.b. Martin P. Morawitz A. Moutoussi J. Nash J.k. Sedgbeer P. Spagnolo A.m. Stacey M.d. Williams V.m. Ghete P. Girtler D. Kuhn G. Rudolph A.p. Betteridge C.k. Bowdery P. Colrain G. Crawford A.j. Finch F. Foster G. Hughes R.w.l. Jones T. Sloan E.p. Whelan M.i. Williams C. Hoffmann K. Jakobs K. Kleinknecht G. Quast B. Renk E. Rohne H.-g. Sander P. Van Gemmeren C. Zeitnitz J.j. Aubert C. Benchouk A. Bonissent G. Bujosa J. Carr P. Coyle C. Diaconu A. Ealet D. Fouchez N. Konstantinidis O. Leroy F. Motsch P. Payre M. Talby A. Sadouki M. Thulasidas A. Tilquin K. Trabelsi M. Aleppo M. Antonelli F. Ragusa R. Berlich W. Blum V. Büscher H. Dietl G. Ganis C. Gotzhein H. Kroha G. Lütjens G. Lutz W. Männer H.-g. Moser R. Richter A. Rosado-schlosser S. Schael R. Settles H. Seywerd R.st. Denis H. Stenzel W. Wiedenmann G. Wolf J. Boucrot O. Callot S. Chen A. Cordier M. Davier L. Duflot J.-f. Grivaz Ph. Heusse A. Höcker A. Jacholkowska M. Jacquet D.w. Kim F. Le Diberder J. Lefrançois A.-m. Lutz I. Nikolic M.-h. Schune L. Serin S. Simion E. Tournefier J.-j. Veillet I. Videau D. Zerwas P. Azzurri G. Bagliesi S. Bettarini C. Bozzi G. Calderini V. Ciulli R. Dell'orso R. Fantechi I. Ferrante A. Giassi A. Gregorio F. Ligabue A. Lusiani P.s. Marrocchesi A. Messineo F. Palla G. Sanguinetti A. Sciabà G. Sguazzoni J. Steinberger R. Tenchini C. Vannini A. Venturi P.g. Verdini G.a. Blair L.m. Bryant J.t. Chambers Y. Gao M.g. Green T. Medcalf P. Perrodo J.a. Strong J.h. Von Wimmersperg-toeller D.r. Botterill R.w. Clifft T.r. Edgecock S. Haywood P. Maley P.r. Norton J.c. Thompson A.e. Wright B. Bloch-devaux P. Colas B. Fabbro W. Kozanecki E. Lançon M.c. Lemaire E. Locci P. Perez J. Rander J.-f. Renardy A. Rosowsky A. Roussarie J.-p. Schuller J. Schwindling A. Trabelsi B. Vallage S.n. Black J.h. Dann H.y. Kim A.m. Litke M.a. Mcneil G. Taylor C.n. Booth R. Boswell C.a.j. Brew S. Cartwright F. Combley M.s. Kelly M. Lehto W.m. Newton J. Reeve L.f. Thompson K. Affholderbach A. Böhrer S. Brandt G. Cowan J. Foss C. Grupen G. Lutters P. Saraiva L. Smolik F. Stephan M. Apollonio L. Bosisio R. Della Marina G. Giannini B. Gobbo G. Musolino J. Putz J. Rothberg S. Wasserbaech R.w. Williams S.r. Armstrong E. Charles P. Elmer D.p.s. Ferguson S. González T.c. Greening O.j. Hayes H. Hu S. Jin P.a. Mcnamara J.m. Nachtman J. Nielsen W. Orejudos Y.b. Pan Y. Saadi I.j. Scott J. Walsh Sau Lan Wu X. Wu J.m. Yamartino G. Zobernig

subject

Quark Nuclear and High Energy Physics Particle physics Aleph Top quark FOS: Physical sciences 01 natural sciences Bottom quark High Energy Physics - Experiment ALEPH Experiment High Energy Physics - Experiment (hep-ex)0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]ALEPH Experiment; LEP; scalar top and bottom quarks 010306 general physics Nuclear Experiment ALEPH experiment Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Scalar (physics)Supersymmetry LEP scalar top and bottom quarks High Energy Physics::Experiment Particle Physics - Experiment

description

Searches for scalar top and bottom quarks have been performed with data collected by the ALEPH detector at LEP. The data sample consists of 21.7 pb^-1 taken at sqrt{s} = 161, 170, and 172~GeV and 5.7 pb^-1 taken at sqrt{s} = 130 and 136~GeV. No evidence for scalar top quarks or scalar bottom quarks was found in the channels stop --> c chi, stop --> b l snu, and sbottom --> b chi. For the channel stop --> c chi a limit of 67 GeV/c^2 has been set on the scalar top quark mass, independent of the mixing angle between the supersymmetric partners of the left and right-handed states of the top quark. This limit assumes a mass difference between the stop and the chi of at least 10 GeV/c^2. For the channel stop --> b l snu the mixing-angle independent scalar top limit is 70 GeV/c^2, assuming a mass difference between the stop and the snu of at least 10 GeV/c^2. For the channel sbottom --> b chi, a limit of 73 GeV/c^2 has been set on the mass of the supersymmetric partner of the left-handed state of the bottom quark. This limit is valid if the mass difference between the sbottom and the chi is at least 10 GeV/c^2.

year	journal	country	edition	language
1997-08-14

10.1016/s0370-2693(97)01178-7 http://cds.cern.ch/record/331194