Data collected at centre-of-mass energies from 189 GeV to 202 GeV by the ALEPH detector at LEP corresponding to an integrated luminosity of 411 pb−1, are analysed in a search for the scalar top in the decay channels for small mass differences between the stop and the lightest neutralino. No evidence for deviations from the Standard Model expectation is found and a lower limit of 59 GeV/c2 is set for the stop mass, independent of the stop to neutralino mass difference and of the stop lifetime.
Search for a scalar top almost degenerate with the lightest neutralino in e+e− collisions at up to 202 GeV / R. Barate;D. Decamp;P. Ghez;C. Goy;S. Jezequel;J.-P. Lees;F. Martin;E. Merle;M.-N. Minard;B. Pietrzyk;S. Bravo;M.P. Casado;M. Chmeissani;J.M. Crespo;E. Fernandez;M. Fernandez-Bosman;Ll. Garrido;E. Graugés;J. Lopez;M. Martinez;G. Merino;R. Miquel;Ll.M. Mir;A. Pacheco;D. Paneque;H. Ruiz;A. Colaleo;D. Creanza;N. De Filippis;M. de Palma;G. Iaselli;G. Maggi;M. Maggi;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;G. Boix;O. Buchmüller;M. Cattaneo;F. Cerutti;G. Dissertori;H. Drevermann;R.W. Forty;M. Frank;F. Gianotti;T.C. Greening;J.B. Hansen;J. Harvey;P. Janot;B. Jost;M. Kado;V. Lemaitre;P. Maley;P. Mato;A. Minten;A. Moutoussi;F. Ranjard;L. Rolandi;D. Schlatter;M. Schmitt;O. Schneider;P. Spagnolo;W. Tejessy;F. Teubert;E. Tournefier;A. Valassi;J.J. Ward;A.E. Wright;Z. Ajaltouni;F. Badaud;G. Chazelle;O. Deschamps;S. Dessagne;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J-C. Montret;D. Pallin;J.M. Pascolo;P. Perret;F. Podlyski;J.D. Hansen;J.R. Hansen;P.H. Hansen;B.S. Nilsson;A. Wäänänen;G. Daskalakis;A. Kyriakis;C. Markou;E. Simopoulou;A. Vayaki;A. Blondel;J.-C. Brient;F. Machefert;A. Rougé;M. Swynghedauw;R. Tanaka;H. Videau;E. Focardi;G. Parrini;K. Zachariadou;A. Antonelli;M. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;V. Chiarella;P. Laurelli;G. Mannocchi;F. Murtas;G.P. Murtas;L. Passalacqua;M. Pepe-Altarelli;M. Chalmers;A.W. Halley;J. Kennedy;J.G. Lynch;P. Negus;V. O'Shea;B. Raeven;D. Smith;P. Teixeira-Dias;A.S. Thompson;R. Cavanaugh;S. Dhamotharan;C. Geweniger;P. Hanke;V. Hepp;E.E. Kluge;G. Leibenguth;A. Putzer;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D.M. Binnie;W. Cameron;G. Davies;P.J. Dornan;M. Girone;N. Marinelli;J. Nowell;H. Przysiezniak;J.K. Sedgbeer;J.C. Thompson;E. Thomson;R. White;V.M. Ghete;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C.K. Bowdery;P.G. Buck;D.P. Clarke;G. Ellis;A.J. Finch;F. Foster;G. Hughes;R.W.L. Jones;N.A. Robertson;M. Smizanska;I. Giehl;F. Hölldorfer;K. Jakobs;K. Kleinknecht;M. Kröcker;A.-S. Müller;H.-A. Nürnberger;G. Quast;B. Renk;E. Rohne;H.-G. Sander;S. Schmeling;H. Wachsmuth;C. Zeitnitz;T. Ziegler;A. Bonissent;J. Carr;P. Coyle;C. Curtil;A. Ealet;D. Fouchez;O. Leroy;T. Kachelhoffer;P. Payre;D. Rousseau;A. Tilquin;M. Aleppo;S. Gilardoni;F. Ragusa;H. Dietl;G. Ganis;A. Heister;K. Hüttmann;G. Lütjens;C. Mannert;W. Männer;H.-G. Moser;S. Schael;R. Settles;H. Stenzel;W. Wiedenmann;G. Wolf;P. Azzurri;J. Boucrot;O. Callot;M. Davier;L. Duflot;J.-F. Grivaz;Ph. Heusse;A. Jacholkowska;L. Serin;J.-J. Veillet;I. Videau;J.-B. de Vivie de Régie;D. Zerwas;G. Bagliesi;T. Boccali;G. Calderini;V. Ciulli;L. Foà;A. Giammanco;A. Giassi;F. Ligabue;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;A. Sciabà;G. Sguazzoni;R. Tenchini;A. Venturi;P.G. Verdini;G.A. Blair;J. Coles;G. Cowan;M.G. Green;D.E. Hutchcroft;L.T. Jones;T. Medcalf;J.A. Strong;J.H. von Wimmersperg-Toeller;R.W. Clifft;T.R. Edgecock;P.R. Norton;I.R. Tomalin;B. Bloch-Devaux;D. Boumediene;P. Colas;B. Fabbro;G. Faı̈f;E. Lançon;M.-C. Lemaire;E. Locci;P. Perez;J. Rander;J.-F. Renardy;A. Rosowsky;P. Seager;A. Trabelsi;B. Tuchming;B. Vallage;S.N. Black;J.H. Dann;C. Loomis;H.Y. Kim;N. Konstantinidis;A.M. Litke;M.A. McNeil;G. Taylor;C.N. Booth;S. Cartwright;F. Combley;P.N. Hodgson;M. Lehto;L.F. Thompson;K. Affholderbach;A. Böhrer;S. Brandt;C. Grupen;J. Hess;A. Misiejuk;G. Prange;U. Sieler;C. Borean;G. Giannini;B. Gobbo;H. He;J. Putz;J. Rothberg;S. Wasserbaech;S.R. Armstrong;K. Cranmer;P. Elmer;D.P.S. Ferguson;Y. Gao;S. González;O.J. Hayes;H. Hu;S. Jin;J. Kile;P.A. McNamara III;J. Nielsen;W. Orejudos;Y.B. Pan;Y. Saadi;I.J. Scott;J. Walsh;J. Wu;Sau Lan Wu;X. Wu;G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 488:(2000), pp. 234-246. [10.1016/S0370-2693(00)00893-5]
Search for a scalar top almost degenerate with the lightest neutralino in e+e− collisions at up to 202 GeV
FOCARDI, ETTORE;CIULLI, VITALIANO;
2000
Abstract
Data collected at centre-of-mass energies from 189 GeV to 202 GeV by the ALEPH detector at LEP corresponding to an integrated luminosity of 411 pb−1, are analysed in a search for the scalar top in the decay channels for small mass differences between the stop and the lightest neutralino. No evidence for deviations from the Standard Model expectation is found and a lower limit of 59 GeV/c2 is set for the stop mass, independent of the stop to neutralino mass difference and of the stop lifetime.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.