Search for a fermiophobic Higgs at LEP 2

Department of Physics and Astronomy, Iowa State University, Ames, IA 50011-3160, USA; Physics Department, University Instelling Antwerpen, Universiteitsplein 1, B-2610 Antwerpen and IIHE, ULB-VUB, Pleinlaan 2, B-1050 Brussels and Faculté des Sciences, University de l'Etat Mons, Av. Maistriau 19, B-7000 Mons, Belgium; Physics Laboratory, University of Athens, Solonos Str.104, GR-10680 Athens, Greece; Department of Physics, University of Bergen, Allégaten 55, NO-5007 Bergen, Norway; Dipartimento di Fisica, Università di Bologna and INFN, Via Irnerio 46, IT-40126 Bologna, Italy; Centro Brasileiro de Pesquisas Fı́sicas, rua Xavier Sigaud 150, BR-22290 Rio de Janeiro and Departamento de Fı́sica, Pont. Universidade Católica, C.P. 38071 BR-22453 Rio de Janeiro and Instituto de Fı́sica, Universidade Estadual do Rio de Janeiro, rua São Francisco Xavier 524, Rio de Janeiro, Brazil; Comenius University, Faculty of Mathematics and Physics, Mlynska Dolina, SK-84215 Bratislava, Slovakia; Collège de France, Lab. de Physique Corpusculaire, IN2P3-CNRS, FR-75231 Paris Cedex 05, France; CERN, CH-1211 Geneva 23, Switzerland; Institut de Recherches Subatomiques, IN2P3-CNRS/ULP-BP20, FR-67037 Strasbourg Cedex, France; Now at DESY-Zeuthen, Platanenallee 6, D-15735 Zeuthen, Germany; Institute of Nuclear Physics, N.C.S.R. Demokritos, P.O. Box 60228, GR-15310 Athens, Greece; FZU, Institute of Physics of the C.A.S. High Energy Physics Division, Na Slovance 2, CZ-180 40, Praha 8, Czech Republic; Currently at DPNC, University of Geneva, Quai Ernest-Ansermet 24, CH-1211, Geneva, Switzerland; Dipartimento di Fisica, Università di Genova and INFN, Via Dodecaneso 33, IT-16146 Genova, Italy; Institut des Sciences Nucléaires, IN2P3-CNRS, Université de Grenoble 1, FR-38026 Grenoble Cedex, France; Helsinki Institute of Physics, HIP, P.O. Box 9, FI-00014 Helsinki, Finland; Joint Institute for Nuclear Research, Dubna, Head Post Office, P.O. Box 79, RU-101 000 Moscow, Russian Federation; Institut für Experimentelle Kernphysik, Universität Karlsruhe, Postfach 6980, DE-76128 Karlsruhe, Germany; Institute of Nuclear Physics and University of Mining and Metalurgy, Ul. Kawiory 26a, PL-30055 Krakow, Poland; Université de Paris-Sud, Lab. de l'Accélérateur Linéaire, IN2P3-CNRS, Bât. 200, FR-91405 Orsay Cedex, France; LIP, IST, FCUL-Av. Elias Garcia, 14-1°, PT-1000 Lisboa Codex, Portugal; Department of Physics, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK; LPNHE, IN2P3-CNRS, Université Paris VI et VII, Tour 33 (RdC), 4 place Jussieu, FR-75252 Paris Cedex 05, France; Department of Physics, University of Lund, Sölvegatan 14, SE-223 63 Lund, Sweden; Université Claude Bernard de Lyon, IPNL, IN2P3-CNRS, FR-69622 Villeurbanne Cedex, France; Université d'Aix-Marseille II-CPP, IN2P3-CNRS, FR-13288 Marseille Cedex 09, France; Dipartimento di Fisica, Università di Milano and INFN-MILANO,Via Celoria 16, IT-20133 Milan, Italy; Dipartimento di Fisica, Universitá di Milano-Bicocca and INFN-MILANO, Piazza delle Scienze 3, IT-20126 Milan, Italy; IPNP of MFF, Charles University, Areal MFF, V Holesovickach 2, CZ-180 00, Praha 8, Czech Republic; NIKHEF, Postbus 41882, NL-1009 DB Amsterdam, The Netherlands; National Technical University, Physics Department, Zografou Campus, GR-15773 Athens, Greece; Physics Department, University of Oslo, Blindern, NO-1000 Oslo 3, Norway; Dipartamento Fisica, Universidad Oviedo, Avda. Calvo Sotelo s/n, ES-33007 Oviedo, Spain; Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK; Dipartimento di Fisica, Università di Padova and INFN, Via Marzolo 8, IT-35131 Padua, Italy; Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, UK; Dipartimento di Fisica, Università di Roma II and INFN, Tor Vergata, IT-00173 Rome, Italy; Dipartimento di Fisica, Università di Roma III and INFN, Via della Vasca Navale 84, IT-00146 Rome, Italy; DAPNIA/Service de Physique des Particules, CEA-Saclay, FR-91191 Gif-sur-Yvette Cedex, France; Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros s/n, ES-39006 Santander, Spain; Dipartimento di Fisica, Università degli Studi di Roma La Sapienza, Piazzale Aldo Moro 2, IT-00185 Rome, Italy; Institute for High Energy Physics, Serpukov P.O. Box 35, Protvino (Moscow Region), Russian Federation; J. Stefan Institute, Jamova 39, SI-1000 Ljubljana and Laboratory for Astroparticle Physics, Nova Gorica Polytechnic, Kostanjeviska 16a, SI-5000 Nova Gorica and Department of Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia; Fysikum, Stockholm University, Box 6730, SE-113 85 Stockholm, Sweden; Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Via P. Giuria 1, IT-10125 Turin, Italy; Dipartimento di Fisica, Università di Trieste and INFN, Via A. Valerio 2, IT-34127 Trieste and Istituto di Fisica, Università di Udine, IT-33100 Udine, Italy; Universidade Federal do Rio de Janeiro, C.P. 68528 Cidade Universidade, Ilha do Fundão BR-21945-970 Rio de Janeiro, Brazil; Department of Radiation Sciences, University of Uppsala, P.O. Box 535, SE-751 21 Uppsala, Sweden; IFIC, Valencia-CSIC, and D.F.A.M.N., U. de Valencia, Avda. Dr. Moliner 50, ES-46100 Burjassot (Valencia), Spain; Institut für Hochenergiephysik, Österr. Akad. d. Wissensch., Nikolsdorfergasse 18, AT-1050 Vienna, Austria; Institute of Nuclear Studies and University of Warsaw, Ul. Hoza 69, PL-00681 Warsaw, Poland; Fachbereich Physik, University of Wuppertal, Postfach 100 127, DE-42097 Wuppertal, Germany
Physics Letters B (Impact Factor: 4.57). 05/2001; 507(1-4):89-103. DOI: 10.1016/S0370-2693(01)00449-X

ABSTRACT Higgs bosons predicted by the fermiophobic scenario within Two Higgs Doublets Models were searched for in the data collected by the DELPHI detector at centre-of-mass energies between 189 GeV and 202 GeV, corresponding to a total integrated luminosity of 380 pb−1. No signal was found and confidence limits were derived in the framework of possible extensions of the Standard Model Higgs sector.

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    ABSTRACT: Fermiophobic Higgs bosons (hf) exhibiting large branching ratios for decay to two photons can arise in models with two or more scalar doublets and/or triplets. In such models the conventional production mechanisms at hadron colliders, which rely on the hfVV coupling (V=W,Z), may be rendered ineffective due to severe mixing angle suppression. In this scenario, double hf production may proceed via the complementary mechanism qq’→H±hf with subsequent decay H±→hfW*, leading to events with up to four photons. We perform a simulation of the detection prospects of hf in the multi-photon (>3) channel at the Fermilab Tevatron and show that a sizeable region of the (mH±,mhf) parameter space can be probed during Run II.
    European Physical Journal C 10/2006; 48(1):147-157. · 5.25 Impact Factor

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