Electroproduction of phi(1020) mesons at 1.4 <= Q(2) <= 3.8 GeV(2) measured with the CLAS spectrometerстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Electroproduction of exclusive phi vector mesons has been studied with the CLAS detector in the kinematic range 1.4 <= Q(2) <= 3.8 GeV(2), 0.0 <= t' <= 3.6 GeV(2), and 2.0 <= W <= 3.0 GeV. The scaling exponent for the total cross section as 1/(Q(2) + M(phi)(2))(n) was determined to be n = 2.49 +/- 0.33. The slope of the four-momentum transfer t' distribution is b(phi) = 0.98 +/- 0.17 GeV(-2). Under the assumption of s-channel helicity conservation, we determine the ratio of longitudinal to transverse cross sections to be R = 0.86 +/- 0.24. A two-gluon exchange model is able to reproduce the main features of the data.