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Measurement of the η and η transition form factors at q2=112GeV2

B. Aubert1, R. Barate1, M. Bona1, D. Boutigny1, F. Couderc1, Y. Karyotakis1, J. P. Lees1, V. Poireau1, V. Tisserand1 et al. (BABAR Collaboration)

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Serednyakov12, Yu. I. Skovpen12, E. P. Solodov12, K. Yu Todyshev12, D. S. Best13, M. Bondioli13, M. Bruinsma13, M. Chao13, S. Curry13, I. Eschrich13, D. Kirkby13, A. J. Lankford13, P. Lund13, M. Mandelkern13, R. K. Mommsen13, W. Roethel13, D. P. Stoker13, S. Abachi14, C. Buchanan14, S. D. Foulkes15, J. W. Gary15, O. Long15, B. C. Shen15, K. Wang15, L. Zhang15, H. K. Hadavand16, E. J. Hill16, H. P. Paar16, S. Rahatlou16, V. Sharma16, J. W. Berryhill17, C. Campagnari17, A. Cunha17, B. Dahmes17, T. M. Hong17, D. Kovalskyi17, J. D. Richman17, T. W. Beck18, A. M. Eisner18, C. J. Flacco18, C. A. Heusch18, J. Kroseberg18, W. S. Lockman18, G. Nesom18, T. Schalk18, B. A. Schumm18, A. Seiden18, P. Spradlin18, D. C. Williams18, M. G. Wilson18, J. Albert19, E. Chen19, A. Dvoretskii19, D. G. Hitlin19, I. Narsky19, T. Piatenko19, F. C. Porter19, A. Ryd19, A. Samuel19, R. Andreassen20, G. Mancinelli20, B. T. Meadows20, M. D. Sokoloff20, F. Blanc21, P. C. Bloom21, S. Chen21, W. T. Ford21, J. F. Hirschauer21, A. Kreisel21, U. Nauenberg21, A. Olivas21, W. O. Ruddick21, J. G. Smith21, K. A. Ulmer21, S. R. Wagner21, J. Zhang21, A. Chen22, E. A. Eckhart22, A. Soffer22, W. H. Toki22, R. J. Wilson22, F. Winklmeier22, Q. Zeng22, D. D. Altenburg23, E. Feltresi23, A. Hauke23, H. Jasper23, B. Spaan23, T. Brandt24, V. Klose24, H. M. Lacker24, W. F. Mader24, R. Nogowski24, A. Petzold24, J. Schubert24, K. R. Schubert24, R. Schwierz24, J. E. Sundermann24, A. Volk24, D. Bernard25, G. R. Bonneaud25, P. Grenier25,*, E. Latour25, Ch. Thiebaux25, M. Verderi25, D. J. Bard26, P. J. Clark26, W. Gradl26, F. Muheim26, S. Playfer26, A. I. Robertson26, Y. Xie26, M. Andreotti27, D. Bettoni27, C. Bozzi27, R. Calabrese27, G. Cibinetto27, E. Luppi27, M. Negrini27, A. Petrella27, L. Piemontese27, E. Prencipe27, F. Anulli28, R. Baldini-Ferroli28, A. Calcaterra28, R. de Sangro28, G. Finocchiaro28, S. Pacetti28, P. Patteri28, I. M. Peruzzi28,†, M. Piccolo28, M. Rama28, A. Zallo28, A. Buzzo29, R. Capra29, R. 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Biasini60, R. Covarelli60, M. Pioppi60, C. Angelini61, G. Batignani61, S. Bettarini61, F. Bucci61, G. Calderini61, M. Carpinelli61, R. Cenci61, F. Forti61, M. A. Giorgi61, A. Lusiani61, G. Marchiori61, M. A. Mazur61, M. Morganti61, N. Neri61, E. Paoloni61, G. Rizzo61, J. Walsh61, M. Haire62, D. Judd62, D. E. Wagoner62, J. Biesiada63, N. Danielson63, P. Elmer63, Y. P. Lau63, C. Lu63, J. Olsen63, A. J. S. Smith63, A. V. Telnov63, F. Bellini64, G. Cavoto64, A. D’Orazio64, E. Di Marco64, R. Faccini64, F. Ferrarotto64, F. Ferroni64, M. Gaspero64, L. Li Gioi64, M. A. Mazzoni64, S. Morganti64, G. Piredda64, F. Polci64, F. Safai Tehrani64, C. Voena64, M. Ebert65, H. Schröder65, R. Waldi65, T. Adye66, N. De Groot66, B. Franek66, E. O. Olaiya66, F. F. Wilson66, S. Emery67, A. Gaidot67, S. F. Ganzhur67, G. Hamel de Monchenault67, W. Kozanecki67, M. Legendre67, B. Mayer67, G. Vasseur67, Ch. Yèche67, M. Zito67, W. Park68, M. V. Purohit68, A. W. Weidemann68, J. R. Wilson68, M. T. Allen69, D. Aston69, R. Bartoldus69, P. Bechtle69, N. Berger69, A. M. Boyarski69, R. Claus69, J. P. Coleman69, M. R. Convery69, M. Cristinziani69, J. C. Dingfelder69, D. Dong69, J. Dorfan69, G. P. Dubois-Felsmann69, D. Dujmic69, W. Dunwoodie69, R. C. Field69, T. Glanzman69, S. J. Gowdy69, M. T. Graham69, V. Halyo69, C. Hast69, T. Hryn’ova69, W. R. Innes69, M. H. Kelsey69, P. Kim69, M. L. Kocian69, D. W. G. S. Leith69, S. Li69, J. Libby69, S. Luitz69, V. Luth69, H. L. Lynch69, D. B. MacFarlane69, H. Marsiske69, R. Messner69, D. R. Muller69, C. P. O’Grady69, V. E. Ozcan69, A. Perazzo69, M. Perl69, B. N. Ratcliff69, A. Roodman69, A. A. Salnikov69, R. H. Schindler69, J. Schwiening69, A. Snyder69, J. Stelzer69, D. Su69, M. K. Sullivan69, K. Suzuki69, S. K. Swain69, J. M. Thompson69, J. Va’vra69, N. van Bakel69, M. Weaver69, A. J. R. Weinstein69, W. J. Wisniewski69, M. Wittgen69, D. H. Wright69, A. K. Yarritu69, K. Yi69, C. C. Young69, P. R. Burchat70, A. J. Edwards70, S. A. Majewski70, B. A. Petersen70, C. Roat70, L. Wilden70, S. Ahmed71, M. S. Alam71, R. Bula71, J. A. Ernst71, V. Jain71, B. Pan71, M. A. Saeed71, F. R. Wappler71, S. B. Zain71, W. Bugg72, M. Krishnamurthy72, S. M. Spanier72, R. Eckmann73, J. L. Ritchie73, A. Satpathy73, C. J. Schilling73, R. F. Schwitters73, J. M. Izen74, I. Kitayama74, X. C. Lou74, S. Ye74, F. Bianchi75, F. Gallo75, D. Gamba75, M. Bomben76, L. Bosisio76, C. Cartaro76, F. Cossutti76, G. Della Ricca76, S. Dittongo76, S. Grancagnolo76, L. Lanceri76, L. Vitale76, V. Azzolini77, F. Martinez-Vidal77, Sw. Banerjee78, B. Bhuyan78, C. M. Brown78, D. Fortin78, K. Hamano78, R. Kowalewski78, I. M. Nugent78, J. M. Roney78, R. J. Sobie78, J. J. Back79, P. F. Harrison79, T. E. Latham79, G. B. Mohanty79, H. R. Band80, X. Chen80, B. Cheng80, S. Dasu80, M. Datta80, A. M. Eichenbaum80, K. T. Flood80, J. J. Hollar80, J. R. Johnson80, P. E. Kutter80, H. Li80, R. Liu80, B. Mellado80, A. Mihalyi80, A. K. Mohapatra80, Y. Pan80, M. Pierini80, R. Prepost80, P. Tan80, S. L. Wu80, Z. Yu80, and H. Neal81 (BABAR Collaboration)

  • 1Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France
  • 2Universitat de Barcelona, Fac. Fisica. Dept. ECM, Avda Diagonal 647, 6a planta E-08028 Barcelona, Spain
  • 3Università di Bari, Dipartimento di Fisica, Italy and INFN, I-70126 Bari, Italy
  • 4Institute of High Energy Physics, Beijing 100039, China
  • 5University of Bergen, Institute of Physics, N-5007 Bergen, Norway
  • 6Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
  • 7University of Birmingham, Birmingham, B15 2TT, United Kingdom
  • 8Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany
  • 9University of Bristol, Bristol BS8 1TL, United Kingdom
  • 10University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
  • 11Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
  • 12Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
  • 13University of California at Irvine, Irvine, California 92697, USA
  • 14University of California at Los Angeles, Los Angeles, California 90024, USA
  • 15University of California at Riverside, Riverside, California 92521, USA
  • 16University of California at San Diego, La Jolla, California 92093, USA
  • 17University of California at Santa Barbara, Santa Barbara, California 93106, USA
  • 18University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA
  • 19California Institute of Technology, Pasadena, California 91125, USA
  • 20University of Cincinnati, Cincinnati, Ohio 45221, USA
  • 21University of Colorado, Boulder, Colorado 80309, USA
  • 22Colorado State University, Fort Collins, Colorado 80523, USA
  • 23Universität Dortmund, Institut für Physik, D-44221 Dortmund, Germany
  • 24Technische Universität Dresden, Institut für Kern- und Teilchenphysik, D-01062 Dresden, Germany
  • 25Ecole Polytechnique, LLR, F-91128 Palaiseau, France
  • 26University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
  • 27Università di Ferrara, Dipartimento di Fisica, Italy and INFN, I-44100 Ferrara, Italy
  • 28Laboratori Nazionali di Frascati dell’INFN, I-00044 Frascati, Italy
  • 29Università di Genova, Dipartimento di Fisica, Italy and INFN, I-16146 Genova, Italy
  • 30Harvard University, Cambridge, Massachusetts 02138, USA
  • 31Universität Heidelberg, Physikalisches Institut, Philosophenweg 12, D-69120 Heidelberg, Germany
  • 32Imperial College London, London, SW7 2AZ, United Kingdom
  • 33University of Iowa, Iowa City, Iowa 52242, USA
  • 34Iowa State University, Ames, Iowa 50011-3160, USA
  • 35Johns Hopkins University, Department of Physics & Astronomy, 3400 N. Charles Street Baltimore, Maryland 21218, USA
  • 36Universität Karlsruhe, Institut für Experimentelle Kernphysik, D-76021 Karlsruhe, Germany
  • 37Laboratoire de l’Accélérateur Linéaire, IN2P3-CNRS et Université Paris-Sud 11, Centre Scientifique d’Orsay, B.P. 34, F-91898 ORSAY Cedex, France
  • 38Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 39University of Liverpool, Liverpool L69 7ZE, United Kingdom
  • 40Queen Mary, University of London, E1 4NS, United Kingdom
  • 41University of London, Royal Holloway, United Kingdom and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom
  • 42University of Louisville, Louisville, Kentucky 40292, USA
  • 43University of Manchester, Manchester M13 9PL, United Kingdom
  • 44University of Maryland, College Park, Maryland 20742, USA
  • 45University of Massachusetts, Amherst, Massachusetts 01003, USA
  • 46Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA
  • 47McGill University, Montréal, Québec, Canada H3A 2T8
  • 48Università di Milano, Dipartimento di Fisica, Italy and INFN, I-20133 Milano, Italy
  • 49University of Mississippi, University, Mississippi 38677, USA
  • 50Université de Montréal, Physique des Particules, Montréal, Québec, Canada H3C 3J7
  • 51Mount Holyoke College, South Hadley, Massachusetts 01075, USA
  • 52Università di Napoli Federico II, Dipartimento di Scienze Fisiche, Italy and INFN, I-80126, Napoli, Italy
  • 53NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, The Netherlands
  • 54University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 55Ohio State University, Columbus, Ohio 43210, USA
  • 56University of Oregon, Eugene, Oregon 97403, USA
  • 57Università di Padova, Dipartimento di Fisica, Italy and INFN, I-35131 Padova, Italy
  • 58Universités Paris VI et VII, Laboratoire de Physique Nucléaire et de Hautes Energies, F-75252 Paris, France
  • 59University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
  • 60Università di Perugia, Dipartimento di Fisica, Italy and INFN, I-06100 Perugia, Italy
  • 61Università di Pisa, Dipartimento di Fisica, Scuola Normale Superiore, Italy and INFN, I-56127 Pisa, Italy
  • 62Prairie View A & M University, Prairie View, Texas 77446, USA
  • 63Princeton University, Princeton, New Jersey 08544, USA
  • 64Università di Roma La Sapienza, Dipartimento di Fisica, Italy and INFN, I-00185 Roma, Italy
  • 65Universität Rostock, D-18051 Rostock, Germany
  • 66Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
  • 67DSM/Dapnia, CEA/Saclay, F-91191 Gif-sur-Yvette, France
  • 68University of South Carolina, Columbia, South Carolina 29208, USA
  • 69Stanford Linear Accelerator Center, Stanford, California 94309, USA
  • 70Stanford University, Stanford, California 94305-4060, USA
  • 71State University of New York, Albany, New York 12222, USA
  • 72University of Tennessee, Knoxville, Tennessee 37996, USA
  • 73University of Texas at Austin, Austin, Texas 78712, USA
  • 74University of Texas at Dallas, Richardson, Texas 75083, USA
  • 75Università di Torino, Dipartimento di Fisica Sperimentale, Italy and INFN, I-10125 Torino, Italy
  • 76Università di Trieste, Dipartimento di Fisica, Italy and INFN, I-34127 Trieste, Italy
  • 77IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain
  • 78University of Victoria, Victoria, British Columbia, Canada V8W 3P6
  • 79Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
  • 80University of Wisconsin, Madison, Wisconsin 53706, USA
  • 81Yale University, New Haven, Connecticut 06511, USA

  • *Also at Laboratoire de Physique Corpusculaire, Clermont-Ferrand, France.
  • Also with Università di Perugia, Dipartimento di Fisica, Perugia, Italy.
  • Also with Università della Basilicata, Potenza, Italy.

Phys. Rev. D 74, 012002 – Published 10 July, 2006

DOI: https://doi.org/10.1103/PhysRevD.74.012002

Abstract

We report a study of the processes e+eηγ and e+eηγ at a center-of-mass energy of 10.58 GeV, using a 232fb1 data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 205+6ηγ and 507+8ηγ events over small backgrounds, and measure the cross sections σ(e+eηγ)=4.51.1+1.2±0.3fb and σ(e+eηγ)=5.4±0.8±0.3fb. The corresponding transition form factors at q2=112GeV2 are q2|Fη(q2)|=0.229±0.030±0.008GeV, and q2|Fη(q2)|=0.251±0.019±0.008GeV, respectively.

Article Text

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