# Electroproduction of $\phi(1020)$ Mesons at High $Q^2$ with CLAS

Abstract : Electroproduction of exclusive $\phi$ vector mesons has been studied with the CLAS detector in the kinematical range $1.6\leq Q^2\leq 3.8$ GeV$^{2}$, $0.0\leq t^{\prime}\leq 3.6$ GeV$^{2}$, and $2.0\leq W\leq 3.0$ GeV. The scaling exponent for the total cross section as $1/(Q^2+M_{\phi}^2)^n$ was determined to be $n=2.49\pm 0.33$. The slope of the four-momentum transfer $t'$ distribution is $b_{\phi}=0.98 \pm 0.17$ GeV$^{-2}$. The data are consistent with the assumption of s-channel helicity conservation (SCHC). Under this assumption, we determine the ratio of longitudinal to transverse cross sections to be $R=0.86 \pm 0.24$. A 2-gluon exchange model is able to reproduce the main features of the data.
Type de document :
Article dans une revue
Physical Review C, American Physical Society, 2008, 78, pp.025210. 〈10.1103/PhysRevC.78.025210〉

http://hal.in2p3.fr/in2p3-00268880
Contributeur : Suzanne Robert <>
Soumis le : mardi 1 avril 2008 - 15:45:14
Dernière modification le : mercredi 4 janvier 2017 - 16:21:51

### Citation

J. P. Santoro, E. S. Smith, M. Garçon, M. Guidal, J. M. Laget, et al.. Electroproduction of $\phi(1020)$ Mesons at High $Q^2$ with CLAS. Physical Review C, American Physical Society, 2008, 78, pp.025210. 〈10.1103/PhysRevC.78.025210〉. 〈in2p3-00268880〉

### Métriques

Consultations de la notice