Phys. Rev. D
76,
092006
(2007)
[23 pages]
Study of e+e-→ΛΛ̅ , ΛΣ̅ 0, Σ0Σ̅ 0 using initial state radiation with BABAR
B. Aubert et al. BABAR Collaboration
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B. Aubert1, M. Bona1, D. Boutigny1, Y. Karyotakis1, J. P. Lees1, V. Poireau1, X. Prudent1, V. Tisserand1, A. Zghiche1, J. Garra Tico2, E. Grauges2, L. Lopez3, A. Palano3, M. Pappagallo3, G. Eigen4, B. Stugu4, L. Sun4, G. S. Abrams5, M. Battaglia5, D. N. Brown5, J. Button-Shafer5, R. N. Cahn5, Y. Groysman5, R. G. Jacobsen5, J. A. Kadyk5, L. T. Kerth5, Yu. G. Kolomensky5, G. Kukartsev5, D. Lopes Pegna5, G. Lynch5, L. M. Mir5, T. J. Orimoto5, I. L. Osipenkov5, M. T. Ronan5,*, K. Tackmann5, T. Tanabe5, W. A. Wenzel5, P. del Amo Sanchez6, C. M. Hawkes6, A. T. Watson6, H. Koch7, T. Schroeder7, D. Walker8, D. J. Asgeirsson9, T. Cuhadar-Donszelmann9, B. G. Fulsom9, C. Hearty9, T. S. Mattison9, J. A. McKenna9, A. Khan10, M. Saleem10, L. Teodorescu10, V. E. Blinov11, A. D. Bukin11, V. P. Druzhinin11, V. B. Golubev11, A. P. Onuchin11, S. I. Serednyakov11, Yu. I. Skovpen11, E. P. Solodov11, K. Yu. Todyshev11, M. Bondioli12, S. Curry12, I. Eschrich12, D. Kirkby12, A. J. Lankford12, P. Lund12, M. Mandelkern12, E. C. Martin12, D. P. Stoker12, S. Abachi13, C. Buchanan13, S. D. Foulkes14, J. W. Gary14, F. Liu14, O. Long14, B. C. Shen14, G. M. Vitug14, L. Zhang14, H. P. Paar15, S. Rahatlou15, V. Sharma15, J. W. Berryhill16, C. Campagnari16, A. Cunha16, B. Dahmes16, T. M. Hong16, D. Kovalskyi16, J. D. Richman16, T. W. Beck17, A. M. Eisner17, C. J. Flacco17, C. A. Heusch17, J. Kroseberg17, W. S. Lockman17, T. Schalk17, B. A. Schumm17, A. Seiden17, M. G. Wilson17, L. O. Winstrom17, E. Chen18, C. H. Cheng18, F. Fang18, D. G. Hitlin18, I. Narsky18, T. Piatenko18, F. C. Porter18, R. Andreassen19, G. Mancinelli19, B. T. Meadows19, K. Mishra19, M. D. Sokoloff19, F. Blanc20, P. C. Bloom20, S. Chen20, W. T. Ford20, J. F. Hirschauer20, A. Kreisel20, M. Nagel20, U. Nauenberg20, A. Olivas20, J. G. Smith20, K. A. Ulmer20, S. R. Wagner20, J. Zhang20, A. M. Gabareen21, A. Soffer21,†, W. H. Toki21, R. J. Wilson21, F. Winklmeier21, D. D. Altenburg22, E. Feltresi22, A. Hauke22, H. Jasper22, J. Merkel22, A. Petzold22, B. Spaan22, K. Wacker22, V. Klose23, M. J. Kobel23, H. M. Lacker23, W. F. Mader23, R. Nogowski23, J. Schubert23, K. R. Schubert23, R. Schwierz23, J. E. Sundermann23, A. Volk23, D. Bernard24, G. R. Bonneaud24, E. Latour24, V. Lombardo24, Ch. Thiebaux24, M. Verderi24, P. J. Clark25, W. Gradl25, F. Muheim25, S. Playfer25, A. I. Robertson25, J. E. Watson25, Y. Xie25, M. Andreotti26, D. Bettoni26, C. Bozzi26, R. Calabrese26, A. Cecchi26, G. Cibinetto26, P. Franchini26, E. Luppi26, M. Negrini26, A. Petrella26, L. Piemontese26, E. Prencipe26, V. Santoro26, F. Anulli27, R. Baldini-Ferroli27, A. Calcaterra27, R. de Sangro27, G. Finocchiaro27, S. Pacetti27, P. Patteri27, I. M. Peruzzi27,‡, M. Piccolo27, M. Rama27, A. Zallo27, A. Buzzo28, R. Contri28, M. Lo Vetere28, M. M. Macri28, M. R. Monge28, S. Passaggio28, C. Patrignani28, E. Robutti28, A. Santroni28, S. Tosi28, R. S. Dubitzky30, J. Marks30, S. Schenk30, U. Uwer30, R. S. Dubitzky30, J. Marks30, S. Schenk30, U. Uwer30, D. J. Bard31, P. D. Dauncey31, R. L. Flack31, J. A. Nash31, W. Panduro Vazquez31, M. Tibbetts31, P. K. Behera32, X. Chai32, M. J. Charles32, U. Mallik32, J. Cochran33, H. B. Crawley33, L. Dong33, V. Eyges33, W. T. Meyer33, S. Prell33, E. I. Rosenberg33, A. E. Rubin33, Y. Y. Gao34, A. V. Gritsan34, Z. J. Guo34, C. K. Lae34, A. G. Denig35, M. Fritsch35, G. Schott35, N. Arnaud36, J. Béquilleux36, A. D’Orazio36, M. Davier36, G. Grosdidier36, A. Höcker36, V. Lepeltier36, F. Le Diberder36, A. M. Lutz36, S. Pruvot36, S. Rodier36, P. Roudeau36, M. H. Schune36, J. Serrano36, V. Sordini36, A. Stocchi36, W. F. Wang36, G. Wormser36, D. J. Lange37, D. M. Wright37, I. Bingham38, C. A. Chavez38, J. R. Fry38, E. Gabathuler38, R. Gamet38, D. E. Hutchcroft38, D. J. Payne38, K. C. Schofield38, C. Touramanis38, A. J. Bevan39, K. A. George39, F. Di Lodovico39, R. Sacco39, G. Cowan40, H. U. Flaecher40, D. A. Hopkins40, S. Paramesvaran40, F. Salvatore40, A. C. Wren40, D. N. Brown41, C. L. Davis41, J. Allison42, D. Bailey42, N. R. Barlow42, R. J. Barlow42, Y. M. Chia42, C. L. Edgar42, G. D. Lafferty42, T. J. West42, J. I. Yi42, J. Anderson43, C. Chen43, A. Jawahery43, D. A. Roberts43, G. Simi43, J. M. Tuggle43, G. Blaylock44, C. Dallapiccola44, S. S. Hertzbach44, X. Li44, T. B. Moore44, E. Salvati44, S. Saremi43, R. Cowan45, D. Dujmic45, P. H. Fisher45, K. Koeneke45, G. Sciolla45, M. Spitznagel45, F. Taylor45, R. K. Yamamoto45, M. Zhao45, Y. Zheng45, S. E. Mclachlin46,*, P. M. Patel46, S. H. Robertson46, A. Lazzaro47, F. Palombo47, J. M. Bauer48, L. Cremaldi48, V. Eschenburg48, R. Godang48, R. Kroeger48, D. A. Sanders48, D. J. Summers48, H. W. Zhao48, S. Brunet49, D. Côté49, M. Simard49, P. Taras49, F. B. Viaud49, H. Nicholson50, G. De Nardo51, F. Fabozzi51,§, L. Lista51, D. Monorchio51, C. Sciacca51, M. A. Baak52, G. Raven52, H. L. Snoek52, C. P. Jessop53, K. J. Knoepfel53, J. M. LoSecco53, G. Benelli54, L. A. Corwin54, K. Honscheid54, H. Kagan54, R. Kass54, J. P. Morris53, A. M. Rahimi54, J. J. Regensburger54, S. J. Sekula54, Q. K. Wong54, N. L. Blount55, J. Brau55, R. Frey55, O. Igonkina55, J. A. Kolb55, M. Lu55, R. Rahmat55, N. B. Sinev55, D. Strom55, J. Strube55, E. Torrence55, N. Gagliardi56, A. Gaz56, M. Margoni56, M. Morandin56, A. Pompili56, M. Posocco56, M. Rotondo56, F. Simonetto56, R. Stroili56, C. Voci56, E. Ben-Haim57, H. Briand57, G. Calderini57, J. Chauveau57, P. David57, L. Del Buono57, Ch. de la Vaissière57, O. Hamon57, Ph. Leruste57, J. Malclès57, J. Ocariz57, A. Perez57, J. Prendki57, L. Gladney58, M. Biasini59, R. Covarelli59, E. Manoni59, C. Angelini60, G. Batignani60, S. Bettarini60, M. Carpinelli60, R. Cenci60, A. Cervelli60, F. Forti60, M. A. Giorgi60, A. Lusiani60, G. Marchiori60, M. A. Mazur60, M. Morganti60, N. Neri60, E. Paoloni60, G. Rizzo60, J. J. Walsh60, J. Biesiada61, P. Elmer61, Y. P. Lau61, C. Lu61, J. Olsen61, A. J. S. Smith61, A. V. Telnov61, E. Baracchini62, F. Bellini62, G. Cavoto62, D. del Re62, E. Di Marco62, R. Faccini62, F. Ferrarotto62, F. Ferroni62, M. Gaspero62, P. D. Jackson62, L. Li Gioi62, M. A. Mazzoni62, S. Morganti62, G. Piredda62, F. Polci62, F. Renga62, C. Voena62, M. Ebert63, T. Hartmann63, H. Schröder63, R. Waldi63, T. Adye64, G. Castelli64, B. Franek64, E. O. Olaiya64, W. Roethel64, F. F. Wilson64, S. Emery65, M. Escalier65, A. Gaidot65, S. F. Ganzhur65, G. Hamel de Monchenault65, W. Kozanecki65, G. Vasseur65, Ch. Yèche65, M. Zito65, X. R. Chen66, H. Liu66, W. Park66, M. V. Purohit66, R. M. White66, J. R. Wilson66, M. T. Allen67, D. Aston67, R. Bartoldus67, P. Bechtle67, R. Claus67, J. P. Coleman67, M. R. Convery67, J. C. Dingfelder67, J. Dorfan67, G. P. Dubois-Felsmann67, W. Dunwoodie67, R. C. Field67, T. Glanzman67, S. J. Gowdy67, M. T. Graham67, P. Grenier67, C. Hast67, W. R. Innes67, J. Kaminski67, M. H. Kelsey67, H. Kim67, P. Kim67, M. L. Kocian67, D. W. G. S. Leith67, S. Li67, S. Luitz67, V. Luth67, H. L. Lynch67, D. B. MacFarlane67, H. Marsiske67, R. Messner67, D. R. Muller67, C. P. O’Grady67, I. Ofte67, A. Perazzo67, M. Perl67, T. Pulliam67, B. N. Ratcliff67, A. Roodman67, A. A. Salnikov67, R. H. Schindler67, J. Schwiening67, A. Snyder67, D. Su67, M. K. Sullivan67, K. Suzuki67, S. K. Swain67, J. M. Thompson67, J. Va’vra67, A. P. Wagner67, M. Weaver67, W. J. Wisniewski67, M. Wittgen67, D. H. Wright67, A. K. Yarritu67, K. Yi67, C. C. Young67, V. Ziegler67, P. R. Burchat68, A. J. Edwards68, S. A. Majewski68, T. S. Miyashita68, B. A. Petersen68, L. Wilden68, S. Ahmed69, M. S. Alam69, R. Bula69, J. A. Ernst69, V. Jain69, B. Pan69, M. A. Saeed69, F. R. Wappler69, S. B. Zain69, M. Krishnamurthy70, S. M. Spanier70, R. Eckmann71, J. L. Ritchie71, A. M. Ruland71, C. J. Schilling71, R. F. Schwitters71, J. M. Izen72, X. C. Lou72, S. Ye72, F. Bianchi73, F. Gallo73, D. Gamba73, M. Pelliccioni73, M. Bomben74, L. Bosisio74, C. Cartaro74, F. Cossutti74, G. Della Ricca74, L. Lanceri74, L. Vitale74, M. Bomben74, L. Bosisio74, C. Cartaro74, F. Cossutti74, G. Della Ricca74, L. Lanceri74, L. Vitale74, V. Azzolini75, N. Lopez-March75, F. Martinez-Vidal75,**, D. A. Milanes75, A. Oyanguren75, J. Albert76, Sw. Banerjee76, B. Bhuyan76, K. Hamano76, R. Kowalewski76, I. M. Nugent76, J. M. Roney76, R. J. Sobie76, P. F. Harrison77, J. Ilic77, T. E. Latham77, G. B. Mohanty77, H. R. Band78, X. Chen78, S. Dasu78, K. T. Flood78, J. J. Hollar78, P. E. Kutter78, Y. Pan78, M. Pierini78, R. Prepost78, S. L. Wu78, and H. Neal79 (BABAR Collaboration)
1Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France
2Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain
3Università di Bari, Dipartimento di Fisica and INFN, I-70126 Bari, Italy
4University of Bergen, Institute of Physics, N-5007 Bergen, Norway
5Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
6University of Birmingham, Birmingham, B15 2TT, United Kingdom
7Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany
8University of Bristol, Bristol BS8 1TL, United Kingdom
9University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
10Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
11Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
12University of California at Irvine, Irvine, California 92697, USA
13University of California at Los Angeles, Los Angeles, California 90024, USA
14University of California at Riverside, Riverside, California 92521, USA
15University of California at San Diego, La Jolla, California 92093, USA
16University of California at Santa Barbara, Santa Barbara, California 93106, USA
17University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA
18California Institute of Technology, Pasadena, California 91125, USA
19University of Cincinnati, Cincinnati, Ohio 45221, USA
20University of Colorado, Boulder, Colorado 80309, USA
21Colorado State University, Fort Collins, Colorado 80523, USA
22Universität Dortmund, Institut für Physik, D-44221 Dortmund, Germany
23Technische Universität Dresden, Institut für Kernund Teilchenphysik, D-01062 Dresden, Germany
24Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, F-91128 Palaiseau, France
25University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
26Università di Ferrara, Dipartimento di Fisica and INFN, I-44100 Ferrara, Italy
27Laboratori Nazionali di Frascati dell’INFN, I-00044 Frascati, Italy
28Università di Genova, Dipartimento di Fisica and INFN, I-16146 Genova, Italy
29Harvard University, Cambridge, Massachusetts 02138, USA
30Universität Heidelberg, Physikalisches Institut, Philosophenweg 12, D-69120 Heidelberg, Germany
31Imperial College London, London, SW7 2AZ, United Kingdom
32University of Iowa, Iowa City, Iowa 52242, USA
33Iowa State University, Ames, Iowa 50011-3160, USA
34Johns Hopkins University, Baltimore, Maryland 21218, USA
35Universität Karlsruhe, Institut für Experimentelle Kernphysik, D-76021 Karlsruhe, Germany
36Laboratoire de l’Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d’Orsay, B. P. 34, F-91898 ORSAY Cedex, France
37Lawrence Livermore National Laboratory, Livermore, California 94550, USA
38University of Liverpool, Liverpool L69 7ZE, United Kingdom
39Queen Mary, University of London, E1 4NS, United Kingdom
40University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom
41University of Louisville, Louisville, Kentucky 40292, USA
42University of Manchester, Manchester M13 9PL, United Kingdom
43University of Maryland, College Park, Maryland 20742, USA
44University of Massachusetts, Amherst, Massachusetts 01003, USA
45Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA
46McGill University, Montréal, Québec, Canada H3A 2T8
47Università di Milano, Dipartimento di Fisica and INFN, I-20133 Milano, Italy
48University of Mississippi, University, Mississippi 38677, USA
49Université de Montréal, Physique des Particules, Montréal, Québec, Canada H3C 3J7
50Mount Holyoke College, South Hadley, Massachusetts 01075, USA
51Università di Napoli Federico II, Dipartimento di Scienze Fisiche and INFN, I-80126, Napoli, Italy
52NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, The Netherlands
53University of Notre Dame, Notre Dame, Indiana 46556, USA
54Ohio State University, Columbus, Ohio 43210, USA
55University of Oregon, Eugene, Oregon 97403, USA
56Università di Padova, Dipartimento di Fisica and INFN, I-35131 Padova, Italy
57Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France
58University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
59Università di Perugia, Dipartimento di Fisica and INFN, I-06100 Perugia, Italy
60Università di Pisa, Dipartimento di Fisica, Scuola Normale Superiore and INFN, I-56127 Pisa, Italy
61Princeton University, Princeton, New Jersey 08544, USA
62Università di Roma La Sapienza, Dipartimento di Fisica and INFN, I-00185 Roma, Italy
63Universität Rostock, D-18051 Rostock, Germany
64Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
65DSM/Dapnia, CEA/Saclay, F-91191 Gif-sur-Yvette, France
66University of South Carolina, Columbia, South Carolina 29208, USA
67Stanford Linear Accelerator Center, Stanford, California 94309, USA
68Stanford University, Stanford, California 94305-4060, USA
69State University of New York, Albany, New York 12222, USA
70University of Tennessee, Knoxville, Tennessee 37996, USA
71University of Texas at Austin, Austin, Texas 78712, USA
72University of Texas at Dallas, Richardson, Texas 75083, USA
73Università di Torino, Dipartimento di Fisica Sperimentale and INFN, I-10125 Torino, Italy
74Università di Trieste, Dipartimento di Fisica and INFN, I-34127 Trieste, Italy
75IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain
76University of Victoria, Victoria, British Columbia, Canada V8W 3P6
77Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
78University of Wisconsin, Madison, Wisconsin 53706, USA
79Yale University, New Haven, Connecticut 06511, USA
Received 12 September 2007; published 27 November 2007
We study the e+e-→ΛΛ̅ γ, ΛΣ̅ 0γ, Σ0Σ̅ 0γ processes using 230 fb-1 of integrated luminosity collected by the BABAR detector at e+e- center-of-mass energy of 10.58 GeV. From the analysis of the baryon-antibaryon mass spectra the cross sections for e+e-→ΛΛ̅ , ΛΣ̅ 0, Σ0Σ̅ 0 are measured in the dibaryon mass range from threshold up to 3 GeV/c2. The ratio of electric and magnetic form factors, |GE/GM|, is measured for e+e-→ΛΛ̅ , and limits on the relative phase between Λ form factors are obtained. We also measure the J/ψ→ΛΛ̅ , Σ0Σ̅ 0, and ψ(2S)→ΛΛ̅ branching fractions.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.092006
DOI:
10.1103/PhysRevD.76.092006
PACS:
13.66.Bc, 13.25.Gv, 13.40.Gp, 14.20.Jn
*Deceased. †Now at Tel Aviv University, Tel Aviv, 69978, Israel. ‡Also with Università di Perugia, Dipartimento di Fisica, Perugia, Italy. §Also with Università della Basilicata, Potenza, Italy. **Also with Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain.
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