A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2–0.4 pb is derived for masses between 45 and 86 GeV/c2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c2 on the mass of long-lived charginos.

Search for pair-production of long-lived heavy charged particles in e+e− annihilation / 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;R Miquel;Ll.M Mir;S Orteu;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;G Lutters;P Mato;A Minten;L Moneta;A Pacheco;J.-F Pusztaszeri;F Ranjard;G Rizzo;L Rolandi;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;C Geweniger;G Graefe;P Hanke;G Hansper;V Hepp;E.E Kluge;A Putzer;M Schmidt;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;A.M Stacey;M.D Williams;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 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;D Calvet;J Carr;P Coyle;C Diaconu;N Konstantinidis;O Leroy;F Motsch;P Payre;D Rousseau;M Talby;A Sadouki;M Thulasidas;A Tilquin;K Trabelsi;M Aleppo;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;S Simion;E Tournefier;J.-J Veillet;I Videau;D Zerwas;P Azzurri;G Bagliesi;G Batignani;S Bettarini;C Bozzi;G Calderini;M Carpinelli;M.A Ciocci;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;P Spagnolo;J Steinberger;R Tenchini;G Tonelli;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;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. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 405:(1997), pp. 379-388. [10.1016/S0370-2693(97)00715-6]

Search for pair-production of long-lived heavy charged particles in e+e− annihilation

FOCARDI, ETTORE;CIULLI, VITALIANO;
1997

Abstract

A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2–0.4 pb is derived for masses between 45 and 86 GeV/c2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c2 on the mass of long-lived charginos.
1997
405
379
388
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;R Miquel;Ll.M Mir;S Orteu;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;G Lutters;P Mato;A Minten;L Moneta;A Pacheco;J.-F Pusztaszeri;F Ranjard;G Rizzo;L Rolandi;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;C Geweniger;G Graefe;P Hanke;G Hansper;V Hepp;E.E Kluge;A Putzer;M Schmidt;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;A.M Stacey;M.D Williams;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 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;D Calvet;J Carr;P Coyle;C Diaconu;N Konstantinidis;O Leroy;F Motsch;P Payre;D Rousseau;M Talby;A Sadouki;M Thulasidas;A Tilquin;K Trabelsi;M Aleppo;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;S Simion;E Tournefier;J.-J Veillet;I Videau;D Zerwas;P Azzurri;G Bagliesi;G Batignani;S Bettarini;C Bozzi;G Calderini;M Carpinelli;M.A Ciocci;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;P Spagnolo;J Steinberger;R Tenchini;G Tonelli;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;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
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