Decay-mode independent searches for new scalar bosons with the OPAL detector at LEP

Abbiendi, G.; Marchant, T.E.; Arcelli, S.; Geich-Gimbel, C.; Rozen, Y.; Boutemeur, M.; Burckhart, H.J.; Axen, D.; Scott, W.G.; Mendez-Lorenzo, P.; Vannerem, P.; Mattig, Peter; Dallison, S.; Sachs, K.; Fleck, I.; Polok, J.; Giacomelli, G.; Mohr, W.; Meijers, F.; Leins, A.; Boeriu, O.; Patrick, G.N.; Bonacorsi, D.; Gunther, P.O.; Krop, D.; Mihara, S.; Klier, A.; Akesson, P.F.; Cuffiani, M.; Duckeck, G.; Keeler, R.K.; McPherson, R.A.; Okpara, A.; Tasevsky, M.; Torrence, E.; Tsur, E.; Gruwe, M.; McMahon, T.J.; Kluth, S.; Batley, R.J.; Shears, T.G.; Tran, P.; Kupper, M.; Quadt, A.; Wermes, N.; Pater, J.R.; Zivkovic, Lidija; Yamashita, S.; Spagnolo, S.; Harin-Dirac, M.; Barlow, R.J.; Giunta, Marina; Hensel, C.; Duerdoth, I.P.; Grunhaus, J.; Heuer, R.D.; Karapetian, G.; Menges, W.; Alexander, G.; Seuster, R.; Soldner-Rembold, S.; Shen, B.C.; Hoffman, Kara Dion; Poli, B.; Elfgren, E.; Komamiya, S.; Waller, D.; Stephens, K.; Cammin, J.; Saeki, T.; Herten, G.; Kim, D.H.; Kawamoto, T.; Bell, Kenneth Watson; Wetterling, D.; Schwick, C.; Anderson, K.J.; Wilson, G.W.; Bethke, S.; Hanson, G.G.; Ueda, I.; Ujvari, B.; De Roeck, A.; Dallavalle, G.Marco; Campana, S.; Mashimo, T.; Roney, J.M.; Dado, S.; Igo-Kemenes, P.; Hajdu, C.; Wilson, J.A.; Hamann, M.; Carnegie, R.K.; Wyatt, T.R.; Bock, P.; Martin, J.P.; Nisius, R.; Lu, J.; Behnke, T.; Bella, G.; Brigliadori, L.; Ferrari, P.; Mikenberg, G.; Neal, H.A.; Azuelos, G.; Kobayashi, T.; Furtjes, A.; Ludwig, J.; Levinson, L.; Letts, J.; Marcellini, S.; O'Neale, S.W.; Biebel, O.; von Krogh, J.; Rust, D.R.; Martin, A.J.; Kormos, Laura L.; Klute, M.; Pooth, O.; Duchovni, E.; Bechtle, P.; Fabbri, F.; Mori, T.; Krieger, P.; Kobel, M.; Hill, J.C.; Hauschild, M.; Shepherd-Themistocleous, C.H.; Scharoe-Hansen, P.; Lillich, J.; Renkel, P.; Kanzaki, J.; Watson, A.T.; Macpherson, A.; McDonald, W.J.; Bell, P.J.; Lloyd, S.L.; Buesser, K.; Toya, D.; Barberio, E.; Anagnostou, G.; Gary, John William; Kennedy, B.W.; Trefzger, T.; Caron, B.; Trocsnyi, Z.; Tricoli, A.; Siroli, G.; Watkins, P.M.; Brown, Robert M.; Fiedler, F.; Harder, K.; Bellerive, A.; Mader, W.; De Wolf, E.A.; Cohen, I.; Hawkes, C.M.; Harel, A.; Loebinger, F.K.; Strohmer, R.; Verzocchi, M.; Kokott, T.P.; Dubbert, J.; Pasztor, G.; Kowalewski, Robert V.; Ishii, K.; Przybycien, M.; Rosati, S.; Rembser, C.; Lellouch, D.; Masetti, G.; Stahl, A.; Schroder, Matthias; Spano, F.; Carter, J.R.; Moed, S.; Ford, M.; Zacek, V.; Horvath, D.; Schumacher, M.; Schaile, A.D.; Trigger, I.; Gagnon, P.; Plane, David E.; Howard, R.; Bloodworth, I.J.; Donkers, M.; Oh, A.; Giacomelli, P.; Miller, D.J.; Gross, E.; Thomson, M.A.; Watson, N.K.; Hauschildt, J.; Junk, T.R.; Taylor, R.J.; Kramer, T.; Sherwood, P.; Ward, C.P.; Klein, K.; Sarkisyan, E.K.G.; Mutter, A.; Feld, L.; Rabbertz, K.; Kellogg, R.G.; Layter, J.G.; Sobie, R.; Carter, A.A.; Mes, H.; Teuscher, R.; Asai, S.; Nakamura, I.; Schoerner-Sadenius, Thomas; Chang, C.Y.; Tarem, S.; Jovanovic, P.; Vachon, B.; Etzion, E.; Huntemeyer, P.; Pahl, C.; Hawkings, R.; Merritt, F.S.; Rick, H.; Kyberd, P.; Homer, R.J.; Orito, S.; Ainsley, C.; Runge, K.; Smith, A.M.; Csilling, A.; Sahr, O.; Pinfold, J.; Kartvelishvili, V.; Gaycken, G.; Strom, David M.; Turner-Watson, M.F.; Goldberg, J.; Vossebeld, J.; Schieck, J.; Desch, K.; Wengler, T.; Vollmer, C.F.; Gupta, A.; Nagai, K.; Benelli, G.; Bailey, I.; Lanske, D.; Ward, D.R.; Skuja, A.; Karlen, D.; Amaral, P.; McKenna, J.; Oreglia, M.J.; Hemingway, R.J.; Jeremie, H.; Zer-Zion, D.; Voss, H.; Kawagoe, K.; Michelini, A.; Kanaya, N.; Kress, T.; Landsman, H.; Schaile, O.; Braibant, S.; Allison, John; Wells, P.S.; Wolf, G.; Charlton, David G.; Lafferty, G.D.; Frey, A.; Pilcher, J.E.

doi:10.1140/epjc/s2002-01115-1

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000555566 037__ $$9arXiv$$ahep-ex/0206022$$chep-ex
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000555566 084__ $$2CERN Library$$aEP-2002-032
000555566 088__ $$9ep-2002-032
000555566 088__ $$aCERN-EP-2002-032
000555566 100__ $$aAbbiendi, G.
000555566 245__ $$aDecay-mode independent searches for new scalar bosons with the OPAL detector at LEP
000555566 260__ $$c2003
000555566 269__ $$aGeneva$$bCERN$$c14 May 2002
000555566 300__ $$a36 p
000555566 340__ $$apaper
000555566 500__ $$arevised version number 1 submitted on 2003-01-13 15:51:05
000555566 500__ $$9arXiv$$a36 pages, 14 figures
000555566 520__ $$aThis paper describes topological searches for neutral scalar bosons S0 produced in association with a Z0 boson via the Bjorken process e+e- -> S0Z0 at centre-of-mass energies of 91 GeV and 183-209 GeV. These searches are based on studies of the recoil mass spectrum of Z0 -> e+e- and mu+mu- events on a search for S0Z0 with Z0 -> nunu bar and S0 -> e+e- or photons. They cover the decays of the S0 into an arbitrary combination of hadrons, leptons, photons and invisible particles as well as the possibility that it might be stable. No indication for a signal is found in the data and upper limits on the cross section of the Bjorken process are calculated. Cross-section limits are given in terms of a scale factor k with respect to the Standrad Model cross section for the Higgs-strahlung process e+e- -> H0smZ0. These results can be interpreted in general scenarios independently of the decay modes of the S0. The examples considered here are the production of a single new scalar particle with a decay width smaller than the detector mass resolution, and for the first time, two scenarios with continuous mass distributions, due to a single very broad state or several states close in mass.
000555566 520__ $$9arXiv$$aThis paper describes topological searches for neutral scalar bosons S0 produced in association with a Z0 boson via the Bjorken process e+e- -> S0Z0 at centre-of-mass energies of 91 GeV and 183-209 GeV. These searches are based on studies of the recoil mass spectrum of Z0 -> e+e- and mu+mu- events on a search for S0Z0 with Z0 -> nunu bar and S0 -> e+e- or photons. They cover the decays of the S0 into an arbitrary combination of hadrons, leptons, photons and invisible particles as well as the possibility that it might be stable. No indication for a signal is found in the data and upper limits on the cross section of the Bjorken process are calculated. Cross-section limits are given in terms of a scale factor k with respect to the Standrad Model cross section for the Higgs-strahlung process e+e- -> H0smZ0. These results can be interpreted in general scenarios independently of the decay modes of the S0. The examples considered here are the production of a single new scalar particle with a decay width smaller than the detector mass resolution, and for the first time, two scenarios with continuous mass distributions, due to a single very broad state or several states close in mass.
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000555566 901__ $$uSchool of Physics and Astronomy, Univ. Birmingham
000555566 901__ $$uUniv. Bologna and INFN Bologna
000555566 901__ $$uPhysikalisches Institut, Univ. Bonn
000555566 901__ $$uUniv. Calif. Riverside
000555566 901__ $$uCavendish Lab., Cambridge
000555566 901__ $$uOttawa-Carleton Inst. Phys., Carleton Univ.
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000555566 901__ $$uFakultat fur Physik, Albert Ludwigs Univ., Freiburg
000555566 901__ $$uPhysikalisches Inst., Univ. Heidelberg
000555566 901__ $$uIndiana Univ., Bloomington
000555566 901__ $$uQueen Mary and Westfield Coll., Univ. London
000555566 901__ $$uTechnische Hochschule Aachen, III Physikalisches Inst., Aachen
000555566 901__ $$uUniv. College London
000555566 901__ $$uSchuster Lab., Manchester
000555566 901__ $$uUniv. Maryland, College Park
000555566 901__ $$uLab. Phys. Nucl., Univ. Montreal
000555566 901__ $$uUniv. Oregon, Eugene
000555566 901__ $$uCLRC Rutherford Appleton Lab., Chilton
000555566 901__ $$uTechnion-Israel Inst. Technol., Haifa
000555566 901__ $$uTel Aviv Univ.
000555566 901__ $$uInt. Centre Elementary Part. Phys., Univ. Tokyo
000555566 901__ $$uKobe Univ.
000555566 901__ $$uWeizmann Inst. Sci., Rehovot
000555566 901__ $$uUniv. Hamburg/DESY
000555566 901__ $$uUniv. Victoria
000555566 901__ $$uUniv. British Columbia, Vancouver
000555566 901__ $$uUniv. Alberta, Edmonton
000555566 901__ $$uRes. Inst. Part. Nucl. Phys., Budapest
000555566 901__ $$uInst. Nucl. Res., Debrecen
000555566 901__ $$uLudwigs-Maximilians-Univ. Munchen
000555566 901__ $$uMax-Planck-Inst. Phys., Munchen
000555566 901__ $$uYale Univ., New Haven
000555566 916__ $$sn$$w200223$$ya2003
000555566 960__ $$a13
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000555566 963__ $$aPUBLIC
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