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Search for Long-Lived Particles in e+ e- Collisions.
Lees, J P; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lee, M J; Lynch, G; Koch, H; Schroeder, T; Hearty, C; Mattison, T S; McKenna, J A; So, R Y; Khan, A; Blinov, V E; Buzykaev, A R; Druzhinin, V P; Golubev, V B; Kravchenko, E A; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, K Yu; Lankford, A J; Dey, B; Gary, J W; Long, O; Campagnari, C; Franco Sevilla, M; Hong, T M; Kovalskyi, D; Richman, J D; West, C A; Eisner, A M; Lockman, W S; Panduro Vazquez, W; Schumm, B A; Seiden, A; Chao, D S; Cheng, C H; Echenard, B; Flood, K T; Hitlin, D G; Miyashita, T S.
Afiliação
  • Lees JP; Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
  • Poireau V; Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
  • Tisserand V; Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
  • Grauges E; Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain.
  • Palano A; INFN Sezione di Bari, I-70126 Bari, Italy.
  • Eigen G; Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy.
  • Stugu B; University of Bergen, Institute of Physics, N-5007 Bergen, Norway.
  • Brown DN; University of Bergen, Institute of Physics, N-5007 Bergen, Norway.
  • Kerth LT; Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
  • Kolomensky YG; Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
  • Lee MJ; Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
  • Lynch G; Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
  • Koch H; Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
  • Schroeder T; Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany.
  • Hearty C; Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany.
  • Mattison TS; University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
  • McKenna JA; University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
  • So RY; University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
  • Khan A; University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
  • Blinov VE; Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom.
  • Buzykaev AR; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Druzhinin VP; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Golubev VB; Novosibirsk State Technical University, Novosibirsk 630092, Russia.
  • Kravchenko EA; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Onuchin AP; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Serednyakov SI; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Skovpen YI; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Solodov EP; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Todyshev KY; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Lankford AJ; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Dey B; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Gary JW; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Long O; Novosibirsk State Technical University, Novosibirsk 630092, Russia.
  • Campagnari C; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Franco Sevilla M; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Hong TM; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Kovalskyi D; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Richman JD; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • West CA; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Eisner AM; Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
  • Lockman WS; Novosibirsk State University, Novosibirsk 630090, Russia.
  • Panduro Vazquez W; University of California at Irvine, Irvine, California 92697, USA.
  • Schumm BA; University of California at Riverside, Riverside, California 92521, USA.
  • Seiden A; University of California at Riverside, Riverside, California 92521, USA.
  • Chao DS; University of California at Riverside, Riverside, California 92521, USA.
  • Cheng CH; University of California at Santa Barbara, Santa Barbara, California 93106, USA.
  • Echenard B; University of California at Santa Barbara, Santa Barbara, California 93106, USA.
  • Flood KT; University of California at Santa Barbara, Santa Barbara, California 93106, USA.
  • Hitlin DG; University of California at Santa Barbara, Santa Barbara, California 93106, USA.
  • Miyashita TS; University of California at Santa Barbara, Santa Barbara, California 93106, USA.
Phys Rev Lett ; 114(17): 171801, 2015 May 01.
Article em En | MEDLINE | ID: mdl-25978225
ABSTRACT
We present a search for a neutral, long-lived particle L that is produced in e+ e- collisions and decays at a significant distance from the e+ e- interaction point into various flavor combinations of two oppositely charged tracks. The analysis uses an e+ e- data sample with a luminosity of 489.1 fb(-1) collected by the BABAR detector at the ϒ(4S), ϒ(3S), and ϒ(2S) resonances and just below the ϒ(4S). Fitting the two-track mass distribution in search of a signal peak, we do not observe a significant signal, and set 90% confidence level upper limits on the product of the L production cross section, branching fraction, and reconstruction efficiency for six possible two-body L decay modes as a function of the L mass. The efficiency is given for each final state as a function of the mass, lifetime, and transverse momentum of the candidate, allowing application of the upper limits to any production model. In addition, upper limits are provided on the branching fraction B(B→XsL), where Xs is a strange hadronic system.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2015 Tipo de documento: Article País de afiliação: França
Buscar no Google
Imprimir
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2015 Tipo de documento: Article País de afiliação: França