Study of e+e-→pp¯ using initial state radiation with BABAR
B. Aubert,M. Bona, D. Boutigny,Y. Karyotakis,J. P. Lees,V. Poireau, X. Prudent,V. Tisserand,A. Zghiche,J. Garra Tico,E. Grauges, L. Lopez, A. Pompili,M. Pappagallo,G. Eigen, B. Stugu, L. Sun,G. S. Abrams,M. Battaglia, D. N. Brown,J. Button-Shafer,R. N. Cahn,Y. Groysman,R. G. Jacobsen,J. A. Kadyk,L. T. Kerth,Yu. G. Kolomensky, G. Kukartsev,D. Lopes Pegna, G. Lynch,L. M. Mir, T. J. Orimoto,I. L. Osipenkov,M. T. Ronan, K. Tackmann, T. Tanabe,W. A. Wenzel,P. del Amo Sanchez, C. M. Hawkes, A. T. Watson, H. Koch,T. Schroeder, D. Walker,N. Roe,M. Ronan,W. Wenzel,M. Barrett, K. Ford,T. Harrison,A. Hart, C. Hawkes,S. Morgan, A. Watson,M. Fritsch,K. Goetzen,T. Held, H. Koch,B. Lewandowski,M. Pelizaeus,K. Peters,T. Schroeder, M. Steinke,J. Boyd,J. Burke,W. Cottingham, D. Walker,T. Cuhadar-Donszelmann,B. Fulsom, C. Hearty,N. Knecht, T. Mattison, J. McKenna, A. Khan,P. Kyberd,M. Saleem, L. Teodorescu,A. Blinov,V. Blinov,A. Bukin, V. Druzhinin,V. Golubev,E. Kravchenko,A. Onuchin,S. Serednyakov,Yu. 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PHYSICAL REVIEW D（2006）
引用 292|浏览327
摘要
The e(+)e(-) -> p (p) over bar cross section is determined over a range of p (p) over bar masses, from threshold to 4.5 GeV/c(2), by studying the e(+)e(-)-> p (p) over bar gamma process. The data set corresponds to an integrated luminosity of 232 fb(-1), collected with the BABAR detector at the PEP-II storage ring, at an e(+)e(-) center-of-mass energy of 10.6 GeV. The mass dependence of the ratio of electric and magnetic form factors, vertical bar G(E)/G(M)vertical bar, is measured for p (p) over bar masses below 3 GeV/c(2); its value is found to be significantly larger than 1 for masses up to 2.2 GeV/c(2). We also measure J/psi -> p (p) over bar and psi(2S) -> p (p) over bar branching fractions and set an upper limit on Y(4260) -> p (p) over bar production and decay.
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