Search for γγ decays of a Higgs boson produced in association with a fermion pair in e+e− collisions at LEP

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2000
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Abstract
A search for γγ decays of a Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb−1 at centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e+e−→Hff̄, with ff̄=νν̄,e+e−,μ+μ−,τ+τ− or qq̄. Twenty-two events are selected in the data, while 28 events are expected from standard model processes. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e+e−→Hff̄ cross section and the H→γγ branching fraction. In particular, a fermiophobic Higgs boson produced with the standard model cross section is excluded at 95% confidence level for all masses below 100.7GeV/c2.
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Authors R. Barate,D. DeCamp,P. Ghez,C. Goy,S. Jézéquel,J.-P. Lees,F. Martin,E. Merle,M.-N. Minard,B. Pietrzyk,S. Bravo,M.P. Casado,Mokhtar Chmeissani,J.M. Crespo,E. Fernandez,M. Fernandez-Bosman,Ll. Garrido,Eugeni 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,A.W. Halley,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,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,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,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;R. Barate;D. DeCamp;P. Ghez;C. Goy;S. Jézéquel;J.-P. Lees;F. Martin;E. Merle;M.-N. Minard;B. Pietrzyk;S. Bravo;M.P. Casado;Mokhtar Chmeissani;J.M. Crespo;E. Fernandez;M. Fernandez-Bosman;Ll. Garrido;Eugeni 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;A.W. Halley;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;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;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;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;
Journal physics letters b
Year 2000
DOI
10.1016/s0370-2693(00)00821-2
URL
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