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Search for Higgs bosons decaying to WW in $e^+ e^-$ collisions at LEP

S. Schael R. Barate 1 R. Brunelière 1 I. de Bonis 1 D. Decamp 1 C. Goy 1 S. Jézéquel 1 J.P. Lees 1 F. Martin 1 E. Merle 1 M.N. Minard 1 B. Pietrzyk 1 B. Trocmé 1 S. Bravo M.P. Casado M. Chmeissani J.M. Crespo E. Fernandez M. Fernandez-Bosman Ll. Garrido M. Martinez A. Pacheco 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 Jiali Lin Q. Ouyang T. Wang Y. Xie R. Xu S. Xue J. Zhang L. Zhang W. Zhao D. Abbaneo T. Barklow O. Buchmüller M. Cattaneo B. Clerbaux H. Drevermann R.W. Forty M. Frank F. Gianotti J.B. Hansen J. Harvey D.E. Hutchcroft P. Janot B. Jost M. Kado P. Mato A. Moutoussi F. Ranjard L. Rolandi D. Schlatter F. Teubert A. Valassi I. Videau F. Badaud 2 S. Dessagne 2 Alain Falvard 3 D. Fayolle 2 Pascal Gay 2 J. Jousset 2 B. Michel 2 S. Monteil 2 D. Pallin 2 J M. Pascolo 2 Pascal Perret 2 J.D. Hansen J.R. Hansen P.H. Hansen A.C. Kraan B.S. Nilsson A. Kyriakis C. Markou E. Simopoulou A. Vayaki K. Zachariadou A. Blondel 4 J.-C. Brient 4 F. Machefert 4 A. Rougé 4 H. Videau 4 V. Ciulli E. Focardi G. Parrini A. Antonelli M. Antonelli G. Bencivenni F. Bossi G. Capon F. Cerutti V. Chiarella P. Laurelli G. Mannocchi G.P. Murtas L. Passalacqua J. Kennedy J.G. Lynch P. Negus V. O'Shea A.S. Thompson S. Wasserbaech R. Cavanaugh S. Dhamotharan C. Geweniger P. Hanke V. Hepp E.E. Kluge A. Putzer H. Stenzel K. Tittel M. Wunsch R. Beuselinck W. Cameron G. Davies P.J. Dornan M. Girone N. Marinelli J. Nowell S.A. Rutherford J.K. Sedgbeer J.C. Thompson R. White V.M. Ghete P. Girtler E. Kneringer D. Kuhn G. Rudolph E. Bouhova-Thacker C.K. Bowdery D.P. Clarke G. Ellis A.J. Finch F. Foster G. Hughes R.W.L. Jones M.R. Pearson N.A. Robertson M. Smizanska O. van der Aa C. Delaere V. Lemaitre U. Blumenschein F. Hölldorfer K. Jakobs F. Kayser A.-S. Müller B. Renk H.-G. Sander S. Schmeling H. Wachsmuth C. Zeitnitz T. Ziegler A. Bonissent 5 P. Coyle 5 C. Curtil 5 A. Ealet 5 D. Fouchez 5 P. Payre 5 A. Tilquin 5 F. Ragusa A. David H. Dietl G. Ganis K. Hüttmann G. Lütjens W. Männer H.-G. Moser R. Settles M. Villegas G. Wolf J. Boucrot 6 O. Callot 6 M. Davier 6 L. Duflot 6 J.-F. Grivaz 6 Ph. Heusse 6 A. Jacholkowska 3, 6 L. Serin 6 J.-J. Veillet 6 P. Azzurri G. Bagliesi T. Boccali L. Foa A. Giammanco A. Giassi F. Ligabue A. Messineo F. Palla G. Sanguinetti A. Sciaba G. Sguazzoni P. Spagnolo R. Tenchini A. Venturi P.G. Verdini O. Awunor G.A. Blair G. Cowan A. Garcia-Bellido M.G. Green T. Medcalf A. Misiejuk J.A. Strong P. Teixeira-Dias R.W. Clit T.R. Edgecock P.R. Norton I.R. Tomalin J.J. Ward B. Bloch-Devaux D. Boumediene P. Colas B. Fabbro E. Lançon M.-C. Lemaire E. Locci P. Perez J. Rander B. Tuchming B. Vallage A.M. Litke G. Taylor C.N. Booth S. Cartwright F. Combley P.N. Hodgson M. Lehto L.F. Thompson A. Böhrer S. Brandt C. Grupen J. Hess A. Ngac G. Prange C. Borean G. Giannini H. He J. Putz J. Rothberg S.R. Armstrong K. Berkelman K. Cranmer D.P.S. Ferguson Y. Gao S. Gonzalez O.J. Hayes H. Hu S. Jin J. Kile P.A. Mcnamara Iii J. Nielsen Y.B. Pan J.H. von Wimmersperg-Toeller W. Wiedenmann J. Wu Sau Lan Wu X. Wu G. Zobernig G. Dissertori
Abstract : A search for Higgs bosons produced in association with a fermion pair, and decaying to WW, is performed with the data collected by the ALEPH detector at centre-of-mass energies ranging from 191 to 209 GeV. The data correspond to an integrated luminosity of 453.2 pb^-1. Thirteen exclusive selections are developed according to the different final state topologies. No statistically significant evidence for a Higgs boson decaying into a WW pair has been found. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e+e- -> Hff cross section and the H -> WW branching ratio. The data on the search for H -> WW are combined with previously published ALEPH results on the search for H -> gamma gamma, to significantly extend the limits on the mass of a fermiophobic Higgs boson.
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Submitted on : Tuesday, July 11, 2006 - 5:02:25 PM
Last modification on : Thursday, March 5, 2020 - 6:27:52 PM

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S. Schael, R. Barate, R. Brunelière, I. de Bonis, D. Decamp, et al.. Search for Higgs bosons decaying to WW in $e^+ e^-$ collisions at LEP. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2007, 49, pp.439-455. ⟨10.1140/epjc/s10052-006-0158-6⟩. ⟨in2p3-00085111⟩

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