Measurement of the Strange Spectral Function in Hadronic $\tau$ Decays

Abbiendi, G.; Schorner-Sadenius, T.; Arcelli, S.; Geich-Gimbel, C.; Rozen, Y.; Boutemeur, M.; Burckhart, H.J.; Axen, D.; Scott, W.G.; Mattig, Peter; Sachs, K.; Fleck, I.; Giacomelli, G.; Mohr, W.; Meijers, F.; Boeriu, O.; Mori, T.; Gunther, P.O.; Mihara, S.; Klier, A.; Akesson, P.F.; Cuffiani, M.; Duckeck, G.; Keeler, R.K.; McPherson, R.A.; Tasevsky, M.; Torrence, E.; Tsur, E.; Gruwe, M.; Kluth, S.; Batley, R.J.; Shears, T.G.; Tran, P.; Kupper, M.; Quadt, A.; Pater, J.R.; Zivkovic, Lidija; Braibant, S.; Barlow, R.J.; Giunta, Marina; Yamashita, S.; Duerdoth, I.P.; Grunhaus, J.; Heuer, R.D.; Menges, W.; Alexander, G.; Seuster, R.; Soldner-Rembold, S.; Shen, B.C.; Hoffman, Kara Dion; Poli, B.; Azuelos, G.; Komamiya, S.; Waller, D.; Schroder, Matthias; Saeki, T.; Herten, G.; Kawamoto, T.; Nanjo, H.; Bell, Kenneth Watson; Trigger, I.; Anderson, K.J.; Wilson, G.W.; Bethke, S.; Hanson, G.G.; Ueda, I.; Ujvari, B.; De Roeck, A.; 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.; Wengler, T.; Nisius, R.; Dienes, B.; Lu, J.; Behnke, T.; Bella, G.; Brigliadori, L.; Scharff-Hansen, P.; Ferrari, P.; Mikenberg, G.; Neal, H.A.; Okpara, A.; Kobayashi, T.; Wermes, N.; Ludwig, J.; Levinson, L.; Sobie, R.; Lettso, J.; Marcellini, S.; O'Neale, S.W.; Biebel, O.; von Krogh, J.; Martin, A.J.; Pooth, O.; Duchovni, E.; Bechtle, P.; Sarkisyan, E.K.G.; Fabbri, F.; Krieger, P.; Kobel, M.; Hill, J.C.; Hauschild, M.; Turner-Watson, M.F.; Lillich, J.; Renkel, P.; Kanzaki, J.; Watson, A.T.; Bell, P.J.; Lloyd, S.L.; Buesser, K.; Barberio, E.; Anagnostou, G.; Gary, John William; Kennedy, B.W.; Wetterling, D.; Vannerem, P.; Watkins, P.M.; Brown, Robert M.; Fiedler, F.; Bellerive, A.; Mader, W.; De Wolf, E.A.; Hawkes, C.M.; Harel, A.; Loebinger, F.K.; Strohmer, R.; Verzocchi, M.; Dubbert, J.; Pasztor, G.; Ishii, K.; Przybycien, M.; Rosati, S.; Vertesi, R.; Rembser, C.; Lellouch, D.; Masetti, G.; Ludwig, A.; Stahl, A.; Menke, S.; Charlton, D.G.; Spano, F.; Carter, J.R.; Moed, S.; Ford, M.; Horvath, D.; Schumacher, M.; Schaile, A.D.; Gagnon, P.; Plane, David E.; Toya, D.; Donkers, M.; Oh, A.; Giacomelli, P.; Miller, D.J.; Gross, E.; Thomson, M.A.; Watson, N.K.; Junk, T.R.; Kramer, T.; Sherwood, P.; Ward, C.P.; Klein, K.; Ciocca, C.; Mutter, A.; Feld, L.; Rabbertz, K.; Kellogg, R.G.; Layter, J.G.; Kuhl, T.; Carter, A.A.; Mes, H.; Teuscher, R.; Asai, S.; Nakamura, I.; Chang, C.Y.; Tarem, S.; Jovanovic, P.; Etzion, E.; Pahl, C.; Hawkings, R.; Merritt, F.S.; Barillari, T.; Orito, S.; Ainsley, C.; Runge, K.; Smith, A.M.; Csilling, A.; Pinfold, J.; Gaycken, G.; Strom, David M.; Goldberg, J.; Vossebeld, J.; Schieck, J.; Desch, K.; Vollmer, C.F.; Gupta, A.; Nagai, K.; Benelli, G.; Bailey, I.; Lanske, D.; Ward, D.R.; Karlen, D.; Amaral, P.; McKenna, J.; Oreglia, M.J.; Hemingway, R.J.; Jeremie, H.; Kruger, K.; Zer-Zion, D.; Voss, H.; Kawagoe, K.; Michelini, A.; Kanaya, N.; Landsman, H.; Schaile, O.; Allison, John; Wells, P.S.; Wolf, G.; Skuja, A.; Lafferty, G.D.; Frey, A.; Trocsanyi, Z.; Pilcher, J.E.

doi:10.1140/epjc/s2004-01877-2

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000729168 003__ SzGeCERN
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000729168 0247_ $$2DOI$$a10.1140/epjc/s2004-01877-2
000729168 035__ $$9CERN annual report$$a2004-3.0917
000729168 035__ $$9SPIRES$$a5891779
000729168 035__ $$9Inspire$$a651512
000729168 037__ $$9arXiv$$ahep-ex/0406007$$chep-ex
000729168 037__ $$aCERN-PH-EP-2004-010
000729168 041__ $$aeng
000729168 084__ $$2CERN Library$$aPH-EP-2004-010
000729168 088__ $$aCERN-PH-EP-2004-010
000729168 100__ $$aAbbiendi, G.
000729168 245__ $$aMeasurement of the Strange Spectral Function in Hadronic $\tau$ Decays
000729168 260__ $$c2004
000729168 269__ $$aGeneva$$bCERN$$c18 Feb 2004
000729168 300__ $$a33 p
000729168 340__ $$apaper
000729168 500__ $$9arXiv$$a32 pages, 18 figures, Submitted to Euro. Phys.J. C Report-no: CERN-PH-EP/2004-010
000729168 520__ $$aTau Lepton decays with open strangeness in the final state are measured with the OPAL detector at LEP to determine the strange hadronic spectral function of the tau lepton. The decays tau- -> (Kpi)-nu tau, (Kpipi)-nu tau and (Kpipipi)-nu tau with final states consisting of neutral and charged kaons and pions have been studied. The invariant mass distributions of 93.4% of these final states have been experimentally determined. Monte Carlo simulations have been used for the remaining 6.6% and for the strange final states including eta mesons. The reconstructed strange final states, corrected for resolution effects and detection efficiencies, yield the strange spectral function of the tau lepton. The moments of the spectral function and the ratio of strange to non-strange moments, which are important input parameters for theoretical analyses, are determined. Furthermore, the branching fractions B(tau- -> K-pi0nu tau) = (0.471+-0.059stat+-0.023sys)% and B(tau- -> K-pi+pi-nu tau) = (0.415+-0.053stat+-0.040sys)% have been measured.
000729168 520__ $$9Inspire$$aTau lepton decays with open strangeness in the final state are measured with the OPAL detector at LEP to determine the strange hadronic spectral function of the tau lepton. The decays T- ->(Kpi)-nu tau, (Kpipi)-nu tau and (Kpipipi) -nu tau with final states consisting of neutral and charged kaons and pions have been studied. The invariant mass distributions of 93.4% of these final states have been experimentally determined. Monte Carlo simulations have been used for the remaining 6.6% and for the strange final states including eta mesons. The reconstructed strange final states, corrected for resolution effects and detection efficiencies, yield the strange spectral function of the tau lepton. The moments of the spectral function and the ration of strange to non-strange moments, which are important input parameters for theoretical analysis, are determined. Furthermore, the branching fractions B(tau- -> K-pi0nu tau)=(0.471+-0.064stat+_0.022sys)% and B(tau- -> K-pi+pi-nu tau)=(0.415+-0.059stat+-0.031sys)% have been measured.
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000729168 901__ $$uCERN
000729168 901__ $$uSchool of Physics and Astronomy, University of Birmingham
000729168 901__ $$uDipartimento di Fisica dell Universita di Bologna and INFN
000729168 901__ $$uPhysikalisches Institut, Universitat Bonn
000729168 901__ $$uDepartment of Physics, University of California
000729168 901__ $$uCavendish Laboratory, Cambridge
000729168 901__ $$uOttawa-Carleton Institute for Physics, Department of Physics, Carleton University
000729168 901__ $$uEnrico Fermi Institute and Department of Physics, University of Chicago
000729168 901__ $$uFakultat fur Physik, Albert Ludwigs Universitat, Freiburg
000729168 901__ $$uPhysikalisches Institut, Universitat Heidelberg
000729168 901__ $$uIndiana University, Department of Physics
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000729168 901__ $$uTechnische Hochschule Aachen, III Physikalisches Institut, Aachen
000729168 901__ $$uUniversity College London
000729168 901__ $$uDepartment of Physics, Schuster Laboratory, Manchester
000729168 901__ $$uDepartment of Physics, University of Maryland
000729168 901__ $$uLaboratoire de Physique Nucleaire, Universite de Montreal
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000729168 901__ $$uDepartment of Physics, Technion-Israel Institute of Technology
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000729168 901__ $$uKobe University
000729168 901__ $$uParticle Physics Department, Weizmann Institute of Science
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000729168 901__ $$uUniversity of British Columbia, Department of Physics
000729168 901__ $$uUniversity of Alberta, Department of Physics
000729168 901__ $$uResearch Institute for Particle and Nuclear Physics, Budapest
000729168 901__ $$uInstitute of Nuclear Research, Hungary
000729168 901__ $$uLudwigs-Maximilians-Universitat Munchen
000729168 901__ $$uMax-Planck-Institut fur Physik, Munich
000729168 901__ $$uYale University,Department of Physics
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