Search for Long-Lived Particles in e+ e- Collisions

J P Lees¹, V Poireau¹, V Tisserand¹, E Grauges², A Palano^{3

4}, G Eigen⁵, B Stugu⁵, D N Brown⁶, L T Kerth⁶, Yu G Kolomensky⁶, M J Lee⁶, G Lynch⁶, H Koch⁷, T Schroeder⁷, C Hearty⁸, T S Mattison⁸, J A McKenna⁸, R Y So⁸, A Khan⁹, V E Blinov^{10

11

12}, A R Buzykaev¹⁰, V P Druzhinin^{10

11}, V B Golubev^{10

11}, E A Kravchenko^{10

11}, A P Onuchin^{10

11

12}, S I Serednyakov^{10

11}, Yu I Skovpen^{10

11}, E P Solodov^{10

11}, K Yu Todyshev^{10

11}, A J Lankford¹³, B Dey¹⁴, J W Gary¹⁴, O Long¹⁴, C Campagnari¹⁵, M Franco Sevilla¹⁵, T M Hong¹⁵, D Kovalskyi¹⁵, J D Richman¹⁵, C A West¹⁵, A M Eisner¹⁶, W S Lockman¹⁶, W Panduro Vazquez¹⁶, B A Schumm¹⁶, A Seiden¹⁶, D S Chao¹⁷, C H Cheng¹⁷, B Echenard¹⁷, K T Flood¹⁷, D G Hitlin¹⁷, T S Miyashita¹⁷, P Ongmongkolkul¹⁷, F C Porter¹⁷, M Röhrken¹⁷, R Andreassen¹⁸, Z Huard¹⁸, B T Meadows¹⁸, B G Pushpawela¹⁸, M D Sokoloff¹⁸, L Sun¹⁸, P C Bloom¹⁹, W T Ford¹⁹, A Gaz¹⁹, J G Smith¹⁹, S R Wagner¹⁹, R Ayad²⁰, W H Toki²⁰, B Spaan²¹, D Bernard²², M Verderi²², S Playfer²³, D Bettoni²⁴, C Bozzi²⁴, R Calabrese^{24

25}, G Cibinetto^{24

25}, E Fioravanti^{24

25}, I Garzia^{24

25}, E Luppi^{24

25}, L Piemontese²⁴, V Santoro²⁴, A Calcaterra²⁶, R de Sangro²⁶, G Finocchiaro²⁶, S Martellotti²⁶, P Patteri²⁶, I M Peruzzi²⁶, M Piccolo²⁶, M Rama²⁶, A Zallo²⁶, R Contri^{27

28}, M Lo Vetere^{27

28}, M R Monge^{27

28}, S Passaggio²⁷, C Patrignani^{27

28}, E Robutti²⁷, B Bhuyan²⁹, V Prasad²⁹, A Adametz³⁰, U Uwer³⁰, H M Lacker³¹, U Mallik³², C Chen³³, J Cochran³³, S Prell³³, H Ahmed³⁴, A V Gritsan³⁵, N Arnaud³⁶, M Davier³⁶, D Derkach³⁶, G Grosdidier³⁶, F Le Diberder³⁶, A M Lutz³⁶, B Malaescu³⁶, P Roudeau³⁶, A Stocchi³⁶, G Wormser³⁶, D J Lange³⁷, D M Wright³⁷, J P Coleman³⁸, J R Fry³⁸, E Gabathuler³⁸, D E Hutchcroft³⁸, D J Payne³⁸, C Touramanis³⁸, A J Bevan³⁹, F Di Lodovico³⁹, R Sacco³⁹, G Cowan⁴⁰, D N Brown⁴¹, C L Davis⁴¹, A G Denig⁴², M Fritsch⁴², W Gradl⁴², K Griessinger⁴², A Hafner⁴², K R Schubert⁴², R J Barlow⁴³, G D Lafferty⁴³, R Cenci⁴⁴, B Hamilton⁴⁴, A Jawahery⁴⁴, D A Roberts⁴⁴, R Cowan⁴⁵, G Sciolla⁴⁵, R Cheaib⁴⁶, P M Patel⁴⁶, S H Robertson⁴⁶, N Neri⁴⁷, F Palombo^{47

48}, L Cremaldi⁴⁹, R Godang⁴⁹, P Sonnek⁴⁹, D J Summers⁴⁹, M Simard⁵⁰, P Taras⁵⁰, G De Nardo^{51

52}, G Onorato^{51

52}, C Sciacca^{51

52}, M Martinelli⁵³, G Raven⁵³, C P Jessop⁵⁴, J M LoSecco⁵⁴, K Honscheid⁵⁵, R Kass⁵⁵, E Feltresi^{56

57}, M Margoni^{56

57}, M Morandin⁵⁶, M Posocco⁵⁶, M Rotondo⁵⁶, G Simi^{56

57}, F Simonetto^{56

57}, R Stroili^{56

57}, S Akar⁵⁸, E Ben-Haim⁵⁸, M Bomben⁵⁸, G R Bonneaud⁵⁸, H Briand⁵⁸, G Calderini⁵⁸, J Chauveau⁵⁸, Ph Leruste⁵⁸, G Marchiori⁵⁸, J Ocariz⁵⁸, M Biasini^{59

60}, E Manoni⁵⁹, S Pacetti^{59

60}, A Rossi⁵⁹, C Angelini^{61

62}, G Batignani^{61

62}, S Bettarini^{61

62}, M Carpinelli^{61

62}, G Casarosa^{61

62}, A Cervelli^{61

62}, M Chrzaszcz⁶¹, F Forti^{61

62}, M A Giorgi^{61

62}, A Lusiani^{61

63}, B Oberhof^{61

62}, E Paoloni^{61

62}, A Perez⁶¹, G Rizzo^{61

62}, J J Walsh⁶¹, D Lopes Pegna⁶⁴, J Olsen⁶⁴, A J S Smith⁶⁴, F Anulli⁶⁵, R Faccini^{65

66}, F Ferrarotto⁶⁵, F Ferroni^{65

66}, M Gaspero^{65

66}, L Li Gioi⁶⁵, A Pilloni^{65

66}, G Piredda⁶⁵, C Bünger⁶⁷, S Dittrich⁶⁷, O Grünberg⁶⁷, M Hess⁶⁷, T Leddig⁶⁷, C Voß⁶⁷, R Waldi⁶⁷, T Adye⁶⁸, E O Olaiya⁶⁸, F F Wilson⁶⁸, S Emery⁶⁹, G Vasseur⁶⁹, D Aston⁷⁰, D J Bard⁷⁰, C Cartaro⁷⁰, M R Convery⁷⁰, J Dorfan⁷⁰, G P Dubois-Felsmann⁷⁰, W Dunwoodie⁷⁰, M Ebert⁷⁰, R C Field⁷⁰, B G Fulsom⁷⁰, M T Graham⁷⁰, C Hast⁷⁰, W R Innes⁷⁰, P Kim⁷⁰, D W G S Leith⁷⁰, D Lindemann⁷⁰, S Luitz⁷⁰, V Luth⁷⁰, H L Lynch⁷⁰, D B MacFarlane⁷⁰, D R Muller⁷⁰, H Neal⁷⁰, M Perl⁷⁰, T Pulliam⁷⁰, B N Ratcliff⁷⁰, A Roodman⁷⁰, A A Salnikov⁷⁰, R H Schindler⁷⁰, A Snyder⁷⁰, D Su⁷⁰, M K Sullivan⁷⁰, J Va'vra⁷⁰, W J Wisniewski⁷⁰, H W Wulsin⁷⁰, M V Purohit⁷¹, R M White⁷¹, J R Wilson⁷¹, A Randle-Conde⁷², S J Sekula⁷², M Bellis⁷³, P R Burchat⁷³, E M T Puccio⁷³, M S Alam⁷⁴, J A Ernst⁷⁴, R Gorodeisky⁷⁵, N Guttman⁷⁵, D R Peimer⁷⁵, A Soffer⁷⁵, S M Spanier⁷⁶, J L Ritchie⁷⁷, R F Schwitters⁷⁷, B C Wray⁷⁷, J M Izen⁷⁸, X C Lou⁷⁸, F Bianchi^{79

80}, F De Mori^{79

80}, A Filippi⁷⁹, D Gamba^{79

80}, L Lanceri^{81

82}, L Vitale^{81

82}, F Martinez-Vidal⁸³, A Oyanguren⁸³, P Villanueva-Perez⁸³, J Albert⁸⁴, Sw Banerjee⁸⁴, A Beaulieu⁸⁴, F U Bernlochner⁸⁴, H H F Choi⁸⁴, G J King⁸⁴, R Kowalewski⁸⁴, M J Lewczuk⁸⁴, T Lueck⁸⁴, I M Nugent⁸⁴, J M Roney⁸⁴, R J Sobie⁸⁴, N Tasneem⁸⁴, T J Gershon⁸⁵, P F Harrison⁸⁵, T E Latham⁸⁵, H R Band⁸⁶, S Dasu⁸⁶, Y Pan⁸⁶, R Prepost⁸⁶, S L Wu⁸⁶; BABAR Collaboration

Affiliations

¹ Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
² Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain.
³ INFN Sezione di Bari, I-70126 Bari, Italy.
⁴ Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy.
⁵ University of Bergen, Institute of Physics, N-5007 Bergen, Norway.
⁶ Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
⁷ Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany.
⁸ University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
⁹ Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom.
¹⁰ Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
¹¹ Novosibirsk State University, Novosibirsk 630090, Russia.
¹² Novosibirsk State Technical University, Novosibirsk 630092, Russia.
¹³ University of California at Irvine, Irvine, California 92697, USA.
¹⁴ University of California at Riverside, Riverside, California 92521, USA.
¹⁵ University of California at Santa Barbara, Santa Barbara, California 93106, USA.
¹⁶ University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA.
¹⁷ California Institute of Technology, Pasadena, California 91125, USA.
¹⁸ University of Cincinnati, Cincinnati, Ohio 45221, USA.
¹⁹ University of Colorado, Boulder, Colorado 80309, USA.
²⁰ Colorado State University, Fort Collins, Colorado 80523, USA.
²¹ Technische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, Germany.
²² Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France.
²³ University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
²⁴ INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
²⁵ Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, I-44122 Ferrara, Italy.
²⁶ INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
²⁷ INFN Sezione di Genova, I-16146 Genova, Italy.
²⁸ Dipartimento di Fisica, Università di Genova, I-16146 Genova, Italy.
²⁹ Indian Institute of Technology Guwahati, Guwahati, Assam 781 039, India.
³⁰ Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany.
³¹ Humboldt-Universität zu Berlin, Institut für Physik, D-12489 Berlin, Germany.
³² University of Iowa, Iowa City, Iowa 52242, USA.
³³ Iowa State University, Ames, Iowa 50011-3160, USA.
³⁴ Physics Department, Jazan University, Jazan 22822, Kingdom of Saudia Arabia.
³⁵ Johns Hopkins University, Baltimore, Maryland 21218, USA.
³⁶ Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d'Orsay, F-91898 Orsay Cedex, France.
³⁷ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
³⁸ University of Liverpool, Liverpool L69 7ZE, United Kingdom.
³⁹ Queen Mary, University of London, London E1 4NS, United Kingdom.
⁴⁰ University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom.
⁴¹ University of Louisville, Louisville, Kentucky 40292, USA.
⁴² Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany.
⁴³ University of Manchester, Manchester M13 9PL, United Kingdom.
⁴⁴ University of Maryland, College Park, Maryland 20742, USA.
⁴⁵ Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA.
⁴⁶ McGill University, Montréal, Québec H3A 2T8, Canada.
⁴⁷ INFN Sezione di Milano, I-20133 Milano, Italy.
⁴⁸ Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy.
⁴⁹ University of Mississippi, University, Mississippi 38677, USA.
⁵⁰ Université de Montréal, Physique des Particules, Montréal, Québec H3C 3J7, Canada.
⁵¹ INFN Sezione di Napoli, I-80126 Napoli, Italy.
⁵² Dipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli, Italy.
⁵³ NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, Netherlands.
⁵⁴ University of Notre Dame, Notre Dame, Indiana 46556, USA.
⁵⁵ Ohio State University, Columbus, Ohio 43210, USA.
⁵⁶ INFN Sezione di Padova, I-35131 Padova, Italy.
⁵⁷ Dipartimento di Fisica, Università di Padova, I-35131 Padova, Italy.
⁵⁸ Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France.
⁵⁹ INFN Sezione di Perugia, I-06123 Perugia, Italy.
⁶⁰ Dipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy.
⁶¹ INFN Sezione di Pisa, I-56127 Pisa, Italy.
⁶² Dipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy.
⁶³ Scuola Normale Superiore di Pisa, I-56127 Pisa, Italy.
⁶⁴ Princeton University, Princeton, New Jersey 08544, USA.
⁶⁵ INFN Sezione di Roma, I-00185 Roma, Italy.
⁶⁶ Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy.
⁶⁷ Universität Rostock, D-18051 Rostock, Germany.
⁶⁸ Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
⁶⁹ CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France.
⁷⁰ SLAC National Accelerator Laboratory, Stanford, California 94309 USA.
⁷¹ University of South Carolina, Columbia, South Carolina 29208, USA.
⁷² Southern Methodist University, Dallas, Texas 75275, USA.
⁷³ Stanford University, Stanford, California 94305-4060, USA.
⁷⁴ State University of New York, Albany, New York 12222, USA.
⁷⁵ School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel.
⁷⁶ University of Tennessee, Knoxville, Tennessee 37996, USA.
⁷⁷ University of Texas at Austin, Austin, Texas 78712, USA.
⁷⁸ University of Texas at Dallas, Richardson, Texas 75083, USA.
⁷⁹ INFN Sezione di Torino, I-10125 Torino, Italy.
⁸⁰ Dipartimento di Fisica, Università di Torino, I-10125 Torino, Italy.
⁸¹ INFN Sezione di Trieste, I-34127 Trieste, Italy.
⁸² Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy.
⁸³ IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain.
⁸⁴ University of Victoria, Victoria, British Columbia V8W 3P6, Canada.
⁸⁵ Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
⁸⁶ University of Wisconsin, Madison, Wisconsin 53706, USA.

PMID: 25978225
DOI: 10.1103/PhysRevLett.114.171801

Free article

Search for Long-Lived Particles in e+ e- Collisions

J P Lees et al. Phys Rev Lett. 2015.

Free article

. 2015 May 1;114(17):171801.

doi: 10.1103/PhysRevLett.114.171801. Epub 2015 Apr 29.

Authors

Affiliations

¹ Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
² Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain.
³ INFN Sezione di Bari, I-70126 Bari, Italy.
⁴ Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy.
⁵ University of Bergen, Institute of Physics, N-5007 Bergen, Norway.
⁶ Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
⁷ Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany.
⁸ University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
⁹ Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom.
¹⁰ Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
¹¹ Novosibirsk State University, Novosibirsk 630090, Russia.
¹² Novosibirsk State Technical University, Novosibirsk 630092, Russia.
¹³ University of California at Irvine, Irvine, California 92697, USA.
¹⁴ University of California at Riverside, Riverside, California 92521, USA.
¹⁵ University of California at Santa Barbara, Santa Barbara, California 93106, USA.
¹⁶ University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA.
¹⁷ California Institute of Technology, Pasadena, California 91125, USA.
¹⁸ University of Cincinnati, Cincinnati, Ohio 45221, USA.
¹⁹ University of Colorado, Boulder, Colorado 80309, USA.
²⁰ Colorado State University, Fort Collins, Colorado 80523, USA.
²¹ Technische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, Germany.
²² Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France.
²³ University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
²⁴ INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
²⁵ Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, I-44122 Ferrara, Italy.
²⁶ INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
²⁷ INFN Sezione di Genova, I-16146 Genova, Italy.
²⁸ Dipartimento di Fisica, Università di Genova, I-16146 Genova, Italy.
²⁹ Indian Institute of Technology Guwahati, Guwahati, Assam 781 039, India.
³⁰ Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany.
³¹ Humboldt-Universität zu Berlin, Institut für Physik, D-12489 Berlin, Germany.
³² University of Iowa, Iowa City, Iowa 52242, USA.
³³ Iowa State University, Ames, Iowa 50011-3160, USA.
³⁴ Physics Department, Jazan University, Jazan 22822, Kingdom of Saudia Arabia.
³⁵ Johns Hopkins University, Baltimore, Maryland 21218, USA.
³⁶ Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d'Orsay, F-91898 Orsay Cedex, France.
³⁷ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
³⁸ University of Liverpool, Liverpool L69 7ZE, United Kingdom.
³⁹ Queen Mary, University of London, London E1 4NS, United Kingdom.
⁴⁰ University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom.
⁴¹ University of Louisville, Louisville, Kentucky 40292, USA.
⁴² Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany.
⁴³ University of Manchester, Manchester M13 9PL, United Kingdom.
⁴⁴ University of Maryland, College Park, Maryland 20742, USA.
⁴⁵ Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA.
⁴⁶ McGill University, Montréal, Québec H3A 2T8, Canada.
⁴⁷ INFN Sezione di Milano, I-20133 Milano, Italy.
⁴⁸ Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy.
⁴⁹ University of Mississippi, University, Mississippi 38677, USA.
⁵⁰ Université de Montréal, Physique des Particules, Montréal, Québec H3C 3J7, Canada.
⁵¹ INFN Sezione di Napoli, I-80126 Napoli, Italy.
⁵² Dipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli, Italy.
⁵³ NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, Netherlands.
⁵⁴ University of Notre Dame, Notre Dame, Indiana 46556, USA.
⁵⁵ Ohio State University, Columbus, Ohio 43210, USA.
⁵⁶ INFN Sezione di Padova, I-35131 Padova, Italy.
⁵⁷ Dipartimento di Fisica, Università di Padova, I-35131 Padova, Italy.
⁵⁸ Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France.
⁵⁹ INFN Sezione di Perugia, I-06123 Perugia, Italy.
⁶⁰ Dipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy.
⁶¹ INFN Sezione di Pisa, I-56127 Pisa, Italy.
⁶² Dipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy.
⁶³ Scuola Normale Superiore di Pisa, I-56127 Pisa, Italy.
⁶⁴ Princeton University, Princeton, New Jersey 08544, USA.
⁶⁵ INFN Sezione di Roma, I-00185 Roma, Italy.
⁶⁶ Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy.
⁶⁷ Universität Rostock, D-18051 Rostock, Germany.
⁶⁸ Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
⁶⁹ CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France.
⁷⁰ SLAC National Accelerator Laboratory, Stanford, California 94309 USA.
⁷¹ University of South Carolina, Columbia, South Carolina 29208, USA.
⁷² Southern Methodist University, Dallas, Texas 75275, USA.
⁷³ Stanford University, Stanford, California 94305-4060, USA.
⁷⁴ State University of New York, Albany, New York 12222, USA.
⁷⁵ School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel.
⁷⁶ University of Tennessee, Knoxville, Tennessee 37996, USA.
⁷⁷ University of Texas at Austin, Austin, Texas 78712, USA.
⁷⁸ University of Texas at Dallas, Richardson, Texas 75083, USA.
⁷⁹ INFN Sezione di Torino, I-10125 Torino, Italy.
⁸⁰ Dipartimento di Fisica, Università di Torino, I-10125 Torino, Italy.
⁸¹ INFN Sezione di Trieste, I-34127 Trieste, Italy.
⁸² Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy.
⁸³ IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain.
⁸⁴ University of Victoria, Victoria, British Columbia V8W 3P6, Canada.
⁸⁵ Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
⁸⁶ University of Wisconsin, Madison, Wisconsin 53706, USA.

PMID: 25978225
DOI: 10.1103/PhysRevLett.114.171801

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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Search for Long-Lived Particles in e+ e- Collisions

Affiliations

Search for Long-Lived Particles in e+ e- Collisions

Authors

Affiliations

Abstract

LinkOut - more resources

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