Scalar quark searches in e+e- collisions at √s = 181 - 184 GeV

R. Barate,Damir Buskulic,D. Décamp,Ph Ghez,Corinne B. Goy,Stephane Jézéquel,Jean Pierre Lees,Arnaud Lucotte,Françoise F. Martin,E. Merle,Marie Noelle Minard,Jean Yves Nief,Bolek Pietrzyk,Ricard Alemany,Gaëlle Boix,M. P. Casado,Mokhtar A. Chmeissani,José M. Crespo,Manuel C. Delfíno,Enrique Fernández,M. Fernandez-Bosman,Ll C. Garrido,Eugeni S. Graugés,Aurelio Juste,Mauricio C. Martínez,G. Merino,Ramon Miquel,Ll M. Mir,Peter P O Morawitz,I. C. Park,Anna Pascual,Imma Riu,Federico A. Sánchez,Anna Colaleo,Donato Creanza,Mauro De Palma,G. Gelao,Giuseppe Iaselli,Giorgio Pietro Maggi,Marcello Maggi,Salvatore Nuzzo,Antonio Ranieri,Giuseppe Raso,Federico Ruggierí,G. Selvaggi,Lucia Silvestris,Piergiulio Tempesta,Alessia Tricomi,Giuseppe Zito,Xiuping Huáng,Jim Lin,Qun Ouyang,Taijie Wang,Yi Xie,Rui Xu,Shengtian Xue,Jian Zhang,Lei Zhang,Wei Zhao,Duccio Abbaneo,Ulrich J. Becker,P. G. Bright-Thomas,David W. Casper,Marco Cattaneo,V. Ciülli,Günther Dissertori,Hans Drevermann,Roger W. Forty,Markus J. Frank,Fabiola Gianotti,R. Hagelberg,Jørgen Beck Hansen,Jeffrey A. Harvey,Patrick Janot,Beat Jost,I. Lehraus,P. D. Maley,Pere Mató,A. Minten,Lorenzo Moneta,NaDing Qi,Alberto J. Pacheco,Florence Ranjard,Luigi Rolandi,David Rousseau,Dieter Schlatter,Michael Schmitt,Olivier Schneider,W. Tejessy,Frederic Teubert,I. R. Tomalin,M. Vreeswijk,H. W. Wachsmuth,Zeina J. Ajaltouni,Frédérique Badaud,G. Chazelle,Olivier Deschamps,A. Falvard,Catherine Ferdi,Pascal Gay,C. J. Guicheney,Pierre Henrard,J. C. Jousset,B. Michel,Stéphane Monteil,J. C. Montret,Dominique Pallin,Pascal Perret,F. Podlyski,J. Proriol,Philippe Rosnet,Jakob Dines Hansen,John Renner Hansen,Philip H. Hansen,Björn S. Nilsson,B. Rensch,Anders Wäänänen,Georgios Daskalakis,A. Kyriakis,Christos T. Markou,E. Simopoulou,A. Vayaki,Alain P. Blondel,Jean Claude Brient,Frédéric MacHefert,André Rougé,M. Rumpf,Reisaburo Tanaka,Andrea Valassi,Henri Videau,Ettore Focardi,Giuliano Parrini,K. Zachariadou,Richard Cavanaugh,M. J. Corden,C. H. Georgiopoulos,T. Huehn,David E. Jaffe,Angelo Antonelli,Giorgio Bencivenni,G. F. Bologna,Fabio C. Bossi,Pierluigi L. Campana,G. Capon,Francesco Cerutti,Vitaliano Chiarella,Giuseppe Felici,P. Laurelli,G. P. Mannocchi,Fabrizio Murtas,G. P. Murtas,L. Passalacqua,M. Pepe Altarelli,M. Chalmers,Lorenzo J. Curtis,A. W. Halley,James G R Lynch,Peter J. Negus,Val O'Shea,Colin Raine,J. Michael Scarr,Kenway M. Smith,P. Teixeira-Dias,A. Stan Thompson,Evelyn J. Thomson,Jonathan J. Ward,O. L. Büchmüller,S. Dhamotharan,Chr C. Geweniger,G. Graefe,Paul A. Hanke,G. Hansper,Volker Hepp,E. E. Kluge,Alois Putzer,J. Sommer,K. Tittel,Sebastian Werner,Martin Wunsch,R. Beuselinck,David M. Binnie,W. Cameron,PJ J. Dornan,Maria Girone,S. Goodsir,Ed B. Martin,Nancy Marinelli,A. Moutoussi,Jordan A. Nash,J. K. Sedgbeer,Paolo Spagnolo,Michael D. Williams,V. M. Ghete,P. Girtler,Emmerich Kneringer,D. Kuhn,Gerald Rudolph,Chris K. Bowdery,P. G. Buck,P. Colrain,Gregory A. Crawford,AJ J. Finch,F. Foster,G. D. Hughes,Roger W L Jones,Andrew N. Robertson,M. I. Williams,I. Giehl,Christian V. Hoffmann,Karl Heinz Jakobs,Konrad Kleinknècht,M. Kröcker,H. A. Nürnberger,Günter Quast,Burkhard Renk,Eric Rohne,Heinz Georg Sander,Peter Van Gemmeren,Ch Zeitnitz,Th Ziegler,JJ J. Aubert,Chafik Benchouk,Alain Bonissent,G. Bujosa,John Austin Carr,Paschal A. Coyle,Anne Ealet,Dominique Fouchez,Olivier Leroy,F. Motsch,Patrice Payre,Mossadek Talby,A. Sadouki,M. Thulasidas,André Tìlquin,Karim Trabelsi,Mario Aleppo,Mario Antonelli,Francesco Ragusa,R. Berlich,Volker Büscher,Glen A. Cowan,Hans Dietl,Gerardo Ganis,G. Lütjens,C. Mannert,W. E. Männer,Hans Günther Moser,Stefan Schael,Ronald Dean Settles,Henry C J Seywerd,Hasko Stenzel,W. Wiedenmann,Günter K. Wolf,J. Boucrot,Olivier H. Callot,S. Chen,Michel Davier,L. Duflot,Jean François Grivaz,Ph Heusse,Andreas Höcker,Agnieszka Jachołkowska,Marumi Kado,Dongwook Kim,Francois L. Le Diberder,Jaques Lefrançois,L. Serin,Edwige Tournefier,J. J. Veillet,Ioana Videau,Dirk Zerwas,Paolo Azzürri,Giuseppe Bagliesi,Stefano Bettarini,Tommaso Boccali,Concezio Bozzi,Giovanni Calderini,R. Dell'Orso,Riccardo Fantechi,Isidoro Ferrante,A. Giassi,Anna Gregorio,F. Ligabue,Alberto Lusiani,PS S. Marrocchesi,Alberto Messineo,Fabrizio Palla,Giuliana A. Rizzo,Giulio Sanguinetti,Andrea Sciabà,Giacomo Sgüazzoni,Roberto Tenchini,C. Vannini,Andrea Venturi,Piero Giorgio Verdini,Grahame A. Blair,L. M. Bryant,J. T. Chambers,J. Coles,Martin G. Green,T. Medcalf,Pascal Perrodo,John A. Strong,J. H. von Wimmersperg-Toeller,David R. Botterill,R. W. Clifft,T. R. Edgecock,Stephen J. Haywood,PR R. Norton,James C. Thompson,Alison E. Wright,Brigitte Bloch-Devaux,Paul Colas,B. Fabbro,G. Faïf,Eric Lançon,M. C. Lemaire,E. Locci,Patrice Rodríguez Pérez,Helenka Przysiȩzniak,J. Rander,Jean F. Renardy,A. Rosowsky,A. Roussarie,Adel Trabelsi,Bertrand Vallage,S. N. Black,J. H. Dann,H. Y. Kim,Nikos Konstantinidis,Alan M. Litke,M. A. McNeil,Gary N. Taylor,C. N. Booth,Susan L. Cartwright,F. H. Combley,M. S. Kelly,Mark H. Lehto,Lee F. Thompson,K. Affholderbach,Armin Böhrer,Siegmund Brandt,J. Foss,Claus Grupen,Ludek Smolìk,F. Stephan,Gianrossano R. Giannini,Benigno Gobbo,G. Musolino,J. Putz,Joe E. Rothberg,Steven R. Wasserbaech,Robert W. Williams,S. R. Armstrong,A. P. Betteridge,E. Charles,Peter Elmer,D. P S Ferguson,Yongsheng Gao,Sergio González,T. C. Greening,OJ J. Hayes,Hongbo Hu,Shi Jin,PA A. McNamara,Jane M. Nachtman,Jason Nielsen,W. Orejudos,Yi Pan,Y. Saadi,Wu Sau Lan,Xin Wu,Georg Zobernig

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics（1998）

Cited 30|Views76

No score

Abstract

Searches for scalar top, scalar bottom and degenerate scalar quarks have been performed with data collected with the ALEPH detector at LEP. The data sample consists of 57 pb-1 taken at √s = 181-184 GeV. No evidence for scalar top, scalar bottom or degenerate scalar quarks was found in the channels t̃ → cx, t̃ → bℓṽ, b̃ → bx, and q̃ → qx. From the channel t̃ → cx a limit of 74 GeV/c2 has been set on the scalar top quark mass, independent of the mixing angle. This limit assumes a mass difference between the t̃ and the x in the range 10-40 GeV/c2. From the channel t̃ → bℓṽ the mixing-angle-independent scalar top limit is 82 GeV/c2, assuming mt̃ - mṽ > 10 GeV/c2. From the channel b̃ → bx, a limit of 79 GeV/c2 has been set on the mass of the supersymmetric partner of the left-handed state of the bottom quark. This limit is valid for mb̃-mx > 10 GeV/c2. From the channel q̃ → qx a limit of 87 GeV/c2 has been set on the mass of supersymmetric partners of light quarks assuming five degenerate flavours and the production of both "left-handed" and "right-handed" squarks. This limit is valid for mq̃-mx > 5 GeV/c2. © 1998 Published by Elsevier Science B.V. All rights reserved.

Translated text

Key words

null

AI Read Science

Must-Reading Tree

Example

Generate MRT to find the research sequence of this paper

Chat Paper

Summary is being generated by the instructions you defined