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.
Electroproduction of phi(1020) mesons at 1.4 < Q**2 < 3.8 GeV**2 measured with the CLAS spectrometer
CORVISIERO, PIETRO;RICCO, GIOVANNI;TAIUTI, MAURO GINO;
2008-01-01
Abstract
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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
