The detector simulation program for the OPAL experiment at LEP

J. Allison(University of Manchester), J. Banks(University of Manchester), R. J. Barlow(University of Manchester), J. R. Batley(Cavendish Hospital), O. Biebel(University of Bonn), R. Brun(European Organization for Nuclear Research), A. Buijs(European Organization for Nuclear Research), F.W. Bullock(University College London), C.Y. Chang(University of Maryland, College Park), J.E. Conboy(University College London), R. Cranfield(University College London), G. M. Dallavalle(Istituto Nazionale di Fisica Nucleare, Sezione di Bologna), M. Dittmar(University of California, Riverside), Jean-Charles Dumont(Carleton University), C. Fukunaga(The University of Tokyo), J. W. Gary(University of California, Riverside), J. Gascon(Université de Montréal), N. I. Geddes(Rutherford Appleton Laboratory), S.W. Gensler(Fermi National Accelerator Laboratory), V. Gibson(Cavendish Hospital), J.D. Gillies(Rutherford Appleton Laboratory), J. Hagemann(Universität Hamburg), M. Hansroul(European Organization for Nuclear Research), P. F. Harrison(Queen Mary University of London), J.C. Hart(Université de Montréal), P.M. Hattersley(University of Birmingham), M. Hauschild(European Organization for Nuclear Research), R.J. Hemingway(Carleton University), F.F. Heymann(University College London), P. R. Hobson(Brunel University of London), D. Hochman(Weizmann Institute of Science), R. Hospes(University of Bonn), R. W. L. Jones(Queen Mary University of London), K. Kawagoe(The University of Tokyo), T. Kawamoto(The University of Tokyo), B. W. Kennedy(University College London), L. Köpke(European Organization for Nuclear Research), R. Kowalewski(Carleton University), H. Kreutzmann(University of Bonn), G. Lafferty(Istituto Nazionale di Fisica Nucleare, Sezione di Bologna), J. G. Layter(University of California, Riverside), D. Lellouch(Weizmann Institute of Science), S.L. Llyod(Queen Mary University of London), B. Lorazo(Université de Montréal), M. J. Losty(Carleton University), M.L. Luvisetto(Istituto Nazionale di Fisica Nucleare, Centro Nazionale Analisi Fotogrammi), A.C. McPherson(Carleton University), T. Mashimo(The University of Tokyo), P. Mättig(University of Bonn), J. Mildenberger(Carleton University), W. J. Murray(Rutherford Appleton Laboratory), S.W. OʼNeale(European Organization for Nuclear Research), M. J. Oreglia(University of Chicago), G. N. Patrick(Rutherford Appleton Laboratory), S.J. Pawley(University of Manchester), P. Pfister(University of Freiburg), A. Possoz(University of Chicago), E. Prebys(European Organization for Nuclear Research), G. Quast(Universität Hamburg), M.W. Redmond(University of Chicago), D.L. Rees(University of Birmingham), K. Riles(University of California, Riverside), C.M. Roach(Meiji Gakuin University), A. Rossi(University of Bologna), P. Routenburg(Carleton University), A.D. Schaile(University of Freiburg), G. Tysarczyk-Niemeyer(Heidelberg University), G. J. Dalen(University of California, Riverside), R. Van Kooten(European Organization for Nuclear Research), C. P. Ward(Meiji Gakuin University), D. R. Ward(Meiji Gakuin University), P. M. Watkins(University of Birmingham), N. K. Watson(European Organization for Nuclear Research), S. Weisz(European Organization for Nuclear Research), G. Wilson(Laboratoire de Biologie et Pharmacologie Appliquée), R. Yaari(Weizmann Institute of Science), Pietro Zanarini(University of Bologna)
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
June 1, 1992
10.1016/0168-9002(92)90593-s
Cited by 261Open Access
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Abstract

A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Z0 boson in e+e− collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb−1. The analysis aims to select events containing the hadronic decay products of the Z0 boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Z0 boson are derived. Assuming a branching ratio BR(h0→invisible)=1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained.

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