Search for the Higgs boson in events with isolated photons at LEP 2

被引:16
作者
Abreu, P
Adam, W
Adye, T
Adzic, P
Ajinenko, I
Albrecht, Z
Alderweireld, T
Alekseev, GD
Alemany, R
Allmendinger, T
Allport, PP
Almehed, S
Amaldi, U
Amapane, N
Amato, S
Anassontzis, EG
Andersson, P
Andreazza, A
Andringa, S
Antilogus, P
Apel, WD
Arnoud, Y
Åsman, B
Augustin, JE
Augustinus, A
Baillon, P
Bambade, P
Barao, F
Barbiellini, G
Barbier, R
Bardin, DY
Barker, G
Baroncelli, A
Battaglia, M
Baubillier, M
Becks, KH
Begalli, M
Behrmann, A
Beilliere, P
Belokopytov, Y
Benekos, NC
Benvenuti, AC
Berat, C
Berggren, M
Bertini, D
Bertrand, D
Besancon, M
Bigi, M
Bilenky, MS
Bizouard, MA
机构
[1] FCUL, IST, LIP, PT-1000 Lisbon, Portugal
[2] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA
[3] Univ Instelling Antwerp, Dept Phys, BE-2610 Wilrijk, Belgium
[4] VUB, ULB, IIHE, BE-1050 Brussels, Belgium
[5] Univ Etat Mons, Fac Sci, BE-7000 Mons, Belgium
[6] Univ Athens, Phys Lab, GR-10680 Athens, Greece
[7] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway
[8] Univ Bologna, Dipartimento Fis, IT-40126 Bologna, Italy
[9] Ist Nazl Fis Nucl, IT-40126 Bologna, Italy
[10] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil
[11] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil
[12] Univ Estadual Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil
[13] Comenius Univ, Fac Math & Phys, SK-84215 Bratislava, Slovakia
[14] Coll France, Phys Corpusculaire Lab, IN2P3, CNRS, FR-75231 Paris 05, France
[15] CERN, CH-1211 Geneva 23, Switzerland
[16] ULP, CNRS, IN2P3, Inst Rech Subatom, FR-67037 Strasbourg, France
[17] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece
[18] CAS, Inst Phys, FZU, Div High Energy Phys, CZ-18040 Prague 8, Czech Republic
[19] Univ Genoa, Dipartimento Fis, IT-16146 Genoa, Italy
[20] Ist Nazl Fis Nucl, IT-16146 Genoa, Italy
[21] Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, FR-38026 Grenoble, France
[22] Helsinki Inst Phys, HIP, FI-00014 Helsinki, Finland
[23] Joint Inst Nucl Res Dubna, RU-101000 Moscow, Russia
[24] Univ Karlsruhe, Inst Expt Kernphys, DE-76128 Karlsruhe, Germany
[25] Inst Nucl Phys, PL-30055 Krakow, Poland
[26] Univ Min & Met, PL-30055 Krakow, Poland
[27] Univ Paris 11, Accelerateur Lineaire Lab, IN2P3, CNRS, FR-91405 Orsay, France
[28] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England
[29] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England
[30] Univ Paris 06, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France
[31] Univ Paris 07, FR-75252 Paris 05, France
[32] Univ Lund, Dept Phys, SE-22363 Lund, Sweden
[33] Univ Lyon 1, IPNL, IN2P3, CNRS, FR-69622 Villeurbanne, France
[34] Univ Aix Marseille 2, CPP, IN2P3, CNRS, FR-13288 Marseille 09, France
[35] Univ Milan, Dipartimento Fis, IT-20133 Milan, Italy
[36] Ist Nazl Fis Nucl, IT-20133 Milan, Italy
[37] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark
[38] Charles Univ, MFF, Nucl Ctr, NC,Areal MFF, CZ-18000 Prague 8, Czech Republic
[39] NIKHEF, NL-1009 DB Amsterdam, Netherlands
[40] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece
[41] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway
[42] Univ Oviedo, Dpto Fis, ES-33007 Oviedo, Spain
[43] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
[44] Univ Padua, Dipartimento Fis, IT-35131 Padua, Italy
[45] Ist Nazl Fis Nucl, IT-35131 Padua, Italy
[46] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[47] Univ Rome 2, Dipartimento Fis, IT-00173 Rome, Italy
[48] Ist Nazl Fis Nucl, IT-00173 Rome, Italy
[49] Univ Roma 3, Dipartimento Fis, IT-00146 Rome, Italy
[50] Ist Nazl Fis Nucl, IT-00146 Rome, Italy
关键词
D O I
10.1016/S0370-2693(99)00598-5
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A search for the Higgs boson in final states with one, two or three isolated photons has been performed based on data taken at LEP 2 by the DELPHI detector. The data analysed correspond to a total integrated luminosity of 67.5 pb(-1) at centre-of-mass energies of 161 GeV (9.7 pb(-1)), 172 GeV (10.1 pb(-1)) and 183 GeV (47.7 pb(-1)). No evidence for the processes e(+)e(-) --> H gamma with H --> b (b) over bar or gamma gamma and e(+)e(-) --> Hq (q) over bar with H --> gamma gamma was observed. Model-independent limits on sigma(e(+)e(-) --> H gamma) x BR(H --> b (b) over bar), sigma(e(+)e(-) --> Hq (q) over bar) x BR(H --> gamma gamma) and sigma(e(+)e(-) --> H gamma) x BR(H --> gamma gamma) are set, as well as model-dependent limits on Higgs boson anomalous couplings to vector bosons. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:431 / 446
页数:16
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