A search for the neutral Higgs boson in the processes e(+)e(-) --> Z --> H-0 gamma --> <q(q)over bar gamma> and e(+)e(-) --> Z --> Z*H-0 --> <q(q)over bar gamma gamma> has been performed using 2.8 million hadronic Z decays collected with the L3 detector at LEP from 1991 through 1994. No evidence for these processes has been observed. Upper limits at 95% confidence level for the corresponding cross sections have been set and the results have been compared with theoretical predictions beyond the Standard Model.

Search for new particles in hadronic events with isolated photons / M. Acciarri;A. Adam;O. Adriani;M. AguilarBenitez;S. Ahlen;B. Alpat;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. Andreev;T. Angelescu;D. Antreasyan;A. Arefiev;T. Azemoon;T. Aziz;P. Bagnaia;L. Baksay;R. C. Ball;S. Banerjee;K. Banicz;R. Barillere;L. Barone;P. Bartalini;A. Baschirotto;M. Basile;R. Battiston;A. Bay;F. Becattini;U. Becker;F. Behner;J. Berdugo;P. Berges;B. Bertucci;B. L. Betev;M. Biasini;A. Biland;G. M. Bilei;J. J. Blaising;S. C. Blyth;G. J. Bobbink;R. Bock;A. Bohm;B. Borgia;A. Boucham;D. Bourilkov;M. Bourquin;D. Boutigny;E. Brambilla;J. G. Branson;V. Brigljevic;I. C. Brocka;A. Buijs;A. Bujak;J. D. Burger;W. J. Burger;J. Busenitz;A. Buytenhuijs;X. D. Cai;M. Campanelli;M. Capell;G. C. Romeo;M. Caria;G. Carlino;A. M. Cartacci;J. Casaus;G. Castellini;R. Castello;F. Cavallari;N. Cavallo;C. Cecchi;M. Cerrada;F. Cesaroni;M. Chamizo;A. Chan;Y. H. Chang;U. K. Chaturvedi;M. Chemarin;A. Chen;G. Chen;G. M. Chen;H. F. Chen;H. S. Chen;M. Chen;G. Chiefari;C. Y. Chien;M. T. Choi;L. Cifarelli;F. Cindolo;C. Civinini;I. Clare;R. Clare;H. O. Cohn;G. Coignet;A. P. Colijn;N. Colino;S. Costantini;F. Cotorobai;B. delaCruz;A. Csilling;T. S. Dai;R. DAlessandro;R. deAsmundis;H. DeBoeck;A. Degre;K. Deiters;P. Denes;F. DeNotaristefani;D. DiBitonto;M. Diemoz;D. vanDierendonck;F. DiLodovico;C. Dionisi;M. Dittmar;A. Dominguez;A. Doria;I. Dorne;M. T. Dova;E. Drago;D. Duchesneau;P. Duinker;I. Duran;S. Dutta;S. Easo;Y. Efremenko;H. ElMamouni;A. Engler;F. J. Eppling;F. C. Erne;J. P. Ernenwein;P. Extermann;M. Fabre;R. Faccini;S. Falciano;A. Favara;J. Fay;M. Felcini;C. Furetta;T. Ferguson;D. Fernandez;F. Ferroni;H. Fesefeldt;E. Fiandrini;J. H. Field;F. Filthaut;P. H. Fisher;G. Forconi;L. Fredj;K. Freudenreich;Y. Galaktionov;S. N. Ganguli;S. S. Gau;S. Gentile;J. Gerald;N. Gheordanescu;S. Giagu;S. Goldfarb;J. Goldstein;Z. F. Gong;A. Gougas;G. Gratta;M. W. Gruenewald;V. K. Gupta;A. Gurtu;L. J. Gutay;K. Hangarter;B. Hartmann;A. Hasan;T. Hebbeker;A. Herve;W. C. vanHoek;H. Hofer;H. Hoorani;S. R. Hou;G. Hu;M. M. Ilyas;V. Innocente;H. Janssen;B. N. Jin;L. W. Jones;P. deJong;I. JosaMutuberria;A. Kasser;R. A. Khan;Y. Kamyshkov;P. Kapinos;J. S. Kapustinsky;Y. Karyotakis;M. Kaur;M. N. KienzleFocacci;D. Kim;J. K. Kim;S. C. Kim;Y. G. Kim;W. W. Kinnison;A. Kirkby;D. Kirkby;J. Kirkby;D. Kiss;W. Kittel;A. Klimentov;A. C. Konig;I. Korolko;V. Koustenko;A. Koulbardis;R. W. Kraemer;T. Kramer;W. Krenz;H. Kuijten;A. Kunin;P. L. deGuevara;G. Landi;C. Lapoint;K. LassilaPerini;P. Laurikainen;M. Lebeau;A. Lebedev;P. Lebrun;P. Lecomte;P. Lecoq;P. LeCoultre;J. S. Lee;K. Y. Lee;C. Leggett;J. M. LeGoff;R. Leiste;M. Lenti;E. Leonardi;P. Levtchenko;C. Li;E. Lieb;W. T. Lin;F. L. Linde;L. Lista;Z. A. Liu;W. Lohmann;E. Longo;W. Lu;Y. S. Lu;K. Lubelsmeyer;C. Luci;D. Luckey;L. Ludovici;L. Luminari;W. Lustermann;W. G. Ma;A. Macchiolo;M. Maity;G. Majumder;L. Malgeri;A. Malinin;C. Mana;S. Mangla;P. Marchesini;A. Marin;J. P. Martin;F. Marzano;G. G. G.;K. Mazumdar;D. McNally;S. Mele;L. Merola;M. Meschini;W. J. Metzger;M. vonderMey;Y. Mi;A. Mihul;A. J. W.;G. Mirabelli;J. Mnich;B. Monteleoni;R. Moore;S. Morganti;R. Mount;S. Muller;F. Muheim;E. Nagy;S. Nahn;M. Napolitano;F. NessiTedaldi;H. Newman;A. Nippe;H. Nowak;G. Organtini;R. Ostonen;D. Pandoulas;S. Paoletti;P. Paolucci;H. K. Park;G. Pascale;G. Passaleva;S. Patricelli;T. Paul;M. Pauluzzi;C. Paus;F. Pauss;D. Peach;Y. J. Pei;S. Pensotti;D. PerretGallix;S. Patrak;A. Pevsner;D. Piccolo;M. Pieri;J. C. Pinto;P. A. Piroue;E. Pistolesi;V. Plyaskin;M. Pohl;V. Pojidaev;H. Postema;N. Produit;R. Raghavan;G. RahalCallot;P. G. Rancoita;M. Rattaggi;G. Raven;P. Razis;K. Read;D. Ren;M. Rescigno;S. Reucroft;T. vanRhee;S. Riemann;B. C. Riemers;K. Riles;O. Rind;S. Ro;A. Robohm;J. Rodin;F. J. Rodriguez;B. P. Roe;S. Rohner;L. Romero;S. RosierLees;P. Rosselet;W. vanRossum;S. Roth;J. A. Rubio;H. Rykaczewski;J. Salicio;E. Sanchez;A. Santocchia;M. E. Sarakinos;S. Sarkar;M. Sassowsky;G. Sauvage;C. Schafer;V. Schegelsky;S. SchmidtKaerst;D. Schmitz;P. Schmitz;M. Schneegans;B. Schoeneich;N. Scholz;H. Schopper;D. J. Schotanus;J. Schwenke;G. Schwering;C. Sciacca;D. Sciarrino;J. C. Sens;L. Servoli;S. Shevchenko;N. Shivarov;V. Shoutko;J. Shukla;E. Shumilov;T. Siedenburg;D. Son;A. Sopczak;V. Soulimov;B. Smith;P. Spillantini;M. Steuer;D. P. Stickland;F. Sticozzi;H. Stone;B. Stoyanov;A. Straessner;K. Strauch;K. Sudhakar;G. Sultanov;L. Z. Sun;G. F. Susinno;H. Suter;J. D. Swain;X. W. Tang;L. Tauscher;L. Taylor;S. C. C.;S. M. Ting;F. Tonisch;M. Tonutti;S. C. Tonwar;J. Toth;A. Tsaregorodtsev;C. Tully;H. Tuchscherer;K. L. Tung;J. Ulbricht;U. Uwer;E. Valente;R. T. VandeWalle;G. Vesztergombi;I. Vetlitsky;G. Viertel;M. Vivargent;R. Volkert;H. Vogel;H. Vogt;I. Vorobiev;A. A. Vorobyov;A. A. Vorobyov;A. Vorvolakos;M. Wadhwa;W. Wallraff;J. C. Wang;X. L. Wang;Y. F. Wang;Z. M. Wang;A. Weber;F. Wittgenstein;S. X. Wu;S. Wynhoff;J. Xu;Z. Z. Xu;B. Z. Yang;C. G. Yang;X. Y. Yao;J. B. Ye;S. C. Yeh;J. M. You;C. Zaccardelli;A. Zalite;P. Zemp;Y. Zeng;Z. Zhang;Z. P. Zhang;B. Zhou;Y. Zhou;G. Y. Zhu;R. Y. Zhu;A. Zichichi. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 388:(1996), pp. 409-418. [10.1016/S0370-2693(96)00519-9]

Search for new particles in hadronic events with isolated photons

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. Lenti;
1996

Abstract

A search for the neutral Higgs boson in the processes e(+)e(-) --> Z --> H-0 gamma --> and e(+)e(-) --> Z --> Z*H-0 --> has been performed using 2.8 million hadronic Z decays collected with the L3 detector at LEP from 1991 through 1994. No evidence for these processes has been observed. Upper limits at 95% confidence level for the corresponding cross sections have been set and the results have been compared with theoretical predictions beyond the Standard Model.
1996
388
409
418
M. Acciarri;A. Adam;O. Adriani;M. AguilarBenitez;S. Ahlen;B. Alpat;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. Andreev;T. Angelescu;D. Antreasyan;A. Arefiev;T. Azemoon;T. Aziz;P. Bagnaia;L. Baksay;R. C. Ball;S. Banerjee;K. Banicz;R. Barillere;L. Barone;P. Bartalini;A. Baschirotto;M. Basile;R. Battiston;A. Bay;F. Becattini;U. Becker;F. Behner;J. Berdugo;P. Berges;B. Bertucci;B. L. Betev;M. Biasini;A. Biland;G. M. Bilei;J. J. Blaising;S. C. Blyth;G. J. Bobbink;R. Bock;A. Bohm;B. Borgia;A. Boucham;D. Bourilkov;M. Bourquin;D. Boutigny;E. Brambilla;J. G. Branson;V. Brigljevic;I. C. Brocka;A. Buijs;A. Bujak;J. D. Burger;W. J. Burger;J. Busenitz;A. Buytenhuijs;X. D. Cai;M. Campanelli;M. Capell;G. C. Romeo;M. Caria;G. Carlino;A. M. Cartacci;J. Casaus;G. Castellini;R. Castello;F. Cavallari;N. Cavallo;C. Cecchi;M. Cerrada;F. Cesaroni;M. Chamizo;A. Chan;Y. H. Chang;U. K. Chaturvedi;M. Chemarin;A. Chen;G. Chen;G. M. Chen;H. F. Chen;H. S. Chen;M. Chen;G. Chiefari;C. Y. Chien;M. T. Choi;L. Cifarelli;F. Cindolo;C. Civinini;I. Clare;R. Clare;H. O. Cohn;G. Coignet;A. P. Colijn;N. Colino;S. Costantini;F. Cotorobai;B. delaCruz;A. Csilling;T. S. Dai;R. DAlessandro;R. deAsmundis;H. DeBoeck;A. Degre;K. Deiters;P. Denes;F. DeNotaristefani;D. DiBitonto;M. Diemoz;D. vanDierendonck;F. DiLodovico;C. Dionisi;M. Dittmar;A. Dominguez;A. Doria;I. Dorne;M. T. Dova;E. Drago;D. Duchesneau;P. Duinker;I. Duran;S. Dutta;S. Easo;Y. Efremenko;H. ElMamouni;A. Engler;F. J. Eppling;F. C. Erne;J. P. Ernenwein;P. Extermann;M. Fabre;R. Faccini;S. Falciano;A. Favara;J. Fay;M. Felcini;C. Furetta;T. Ferguson;D. Fernandez;F. Ferroni;H. Fesefeldt;E. Fiandrini;J. H. Field;F. Filthaut;P. H. Fisher;G. Forconi;L. Fredj;K. Freudenreich;Y. Galaktionov;S. N. Ganguli;S. S. Gau;S. Gentile;J. Gerald;N. Gheordanescu;S. Giagu;S. Goldfarb;J. Goldstein;Z. F. Gong;A. Gougas;G. Gratta;M. W. Gruenewald;V. K. Gupta;A. Gurtu;L. J. Gutay;K. Hangarter;B. Hartmann;A. Hasan;T. Hebbeker;A. Herve;W. C. vanHoek;H. Hofer;H. Hoorani;S. R. Hou;G. Hu;M. M. Ilyas;V. Innocente;H. Janssen;B. N. Jin;L. W. Jones;P. deJong;I. JosaMutuberria;A. Kasser;R. A. Khan;Y. Kamyshkov;P. Kapinos;J. S. Kapustinsky;Y. Karyotakis;M. Kaur;M. N. KienzleFocacci;D. Kim;J. K. Kim;S. C. Kim;Y. G. Kim;W. W. Kinnison;A. Kirkby;D. Kirkby;J. Kirkby;D. Kiss;W. Kittel;A. Klimentov;A. C. Konig;I. Korolko;V. Koustenko;A. Koulbardis;R. W. Kraemer;T. Kramer;W. Krenz;H. Kuijten;A. Kunin;P. L. deGuevara;G. Landi;C. Lapoint;K. LassilaPerini;P. Laurikainen;M. Lebeau;A. Lebedev;P. Lebrun;P. Lecomte;P. Lecoq;P. LeCoultre;J. S. Lee;K. Y. Lee;C. Leggett;J. M. LeGoff;R. Leiste;M. Lenti;E. Leonardi;P. Levtchenko;C. Li;E. Lieb;W. T. Lin;F. L. Linde;L. Lista;Z. A. Liu;W. Lohmann;E. Longo;W. Lu;Y. S. Lu;K. Lubelsmeyer;C. Luci;D. Luckey;L. Ludovici;L. Luminari;W. Lustermann;W. G. Ma;A. Macchiolo;M. Maity;G. Majumder;L. Malgeri;A. Malinin;C. Mana;S. Mangla;P. Marchesini;A. Marin;J. P. Martin;F. Marzano;G. G. G.;K. Mazumdar;D. McNally;S. Mele;L. Merola;M. Meschini;W. J. Metzger;M. vonderMey;Y. Mi;A. Mihul;A. J. W.;G. Mirabelli;J. Mnich;B. Monteleoni;R. Moore;S. Morganti;R. Mount;S. Muller;F. Muheim;E. Nagy;S. Nahn;M. Napolitano;F. NessiTedaldi;H. Newman;A. Nippe;H. Nowak;G. Organtini;R. Ostonen;D. Pandoulas;S. Paoletti;P. Paolucci;H. K. Park;G. Pascale;G. Passaleva;S. Patricelli;T. Paul;M. Pauluzzi;C. Paus;F. Pauss;D. Peach;Y. J. Pei;S. Pensotti;D. PerretGallix;S. Patrak;A. Pevsner;D. Piccolo;M. Pieri;J. C. Pinto;P. A. Piroue;E. Pistolesi;V. Plyaskin;M. Pohl;V. Pojidaev;H. Postema;N. Produit;R. Raghavan;G. RahalCallot;P. G. Rancoita;M. Rattaggi;G. Raven;P. Razis;K. Read;D. Ren;M. Rescigno;S. Reucroft;T. vanRhee;S. Riemann;B. C. Riemers;K. Riles;O. Rind;S. Ro;A. Robohm;J. Rodin;F. J. Rodriguez;B. P. Roe;S. Rohner;L. Romero;S. RosierLees;P. Rosselet;W. vanRossum;S. Roth;J. A. Rubio;H. Rykaczewski;J. Salicio;E. Sanchez;A. Santocchia;M. E. Sarakinos;S. Sarkar;M. Sassowsky;G. Sauvage;C. Schafer;V. Schegelsky;S. SchmidtKaerst;D. Schmitz;P. Schmitz;M. Schneegans;B. Schoeneich;N. Scholz;H. Schopper;D. J. Schotanus;J. Schwenke;G. Schwering;C. Sciacca;D. Sciarrino;J. C. Sens;L. Servoli;S. Shevchenko;N. Shivarov;V. Shoutko;J. Shukla;E. Shumilov;T. Siedenburg;D. Son;A. Sopczak;V. Soulimov;B. Smith;P. Spillantini;M. Steuer;D. P. Stickland;F. Sticozzi;H. Stone;B. Stoyanov;A. Straessner;K. Strauch;K. Sudhakar;G. Sultanov;L. Z. Sun;G. F. Susinno;H. Suter;J. D. Swain;X. W. Tang;L. Tauscher;L. Taylor;S. C. C.;S. M. Ting;F. Tonisch;M. Tonutti;S. C. Tonwar;J. Toth;A. Tsaregorodtsev;C. Tully;H. Tuchscherer;K. L. Tung;J. Ulbricht;U. Uwer;E. Valente;R. T. VandeWalle;G. Vesztergombi;I. Vetlitsky;G. Viertel;M. Vivargent;R. Volkert;H. Vogel;H. Vogt;I. Vorobiev;A. A. Vorobyov;A. A. Vorobyov;A. Vorvolakos;M. Wadhwa;W. Wallraff;J. C. Wang;X. L. Wang;Y. F. Wang;Z. M. Wang;A. Weber;F. Wittgenstein;S. X. Wu;S. Wynhoff;J. Xu;Z. Z. Xu;B. Z. Yang;C. G. Yang;X. Y. Yao;J. B. Ye;S. C. Yeh;J. M. You;C. Zaccardelli;A. Zalite;P. Zemp;Y. Zeng;Z. Zhang;Z. P. Zhang;B. Zhou;Y. Zhou;G. Y. Zhu;R. Y. Zhu;A. Zichichi
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