Production of orbitally excited vector mesons in diffractive DIS

被引：6

作者：

Caporale, F ^{[1
]}

Ivanov, IP

机构：

[1] Ist Nazl Fis Nucl, Grp Collegato Cosenza, Cosenza, Italy

[2] Sobolev Inst Math, Novosibirsk, Russia

来源：

PHYSICS LETTERS B | 2005年 / 622卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/j.physletb.2005.06.075

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Within the k(t)-factorization framework, we study diffractive production of orbitally excited vector mesons and compare it with the production of radial excitations, focusing on the rho(1450)/rho(1700) case. At small Q(2), orbital excitation of light quarkonia is found to dominate over radial excitations in diffractive production. We predict strong suppression of the production of orbital excitations by longitudinal photons, which leads to very small sigma(L)/sigma(T) ratio. At small Q(2), the s-channel belicity violating transitions contribute similar to 10-15% of the transverse cross section and similar to 50% of the longitudinal cross section. We also study mixing between radial and orbital excitations and determine strategies towards clarification of S-wave/D-wave assignment to rho(1450) and rho(1700) mesons. The results are compared with the experimental data available, and predictions for future experiments are given. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：55 / 62

页数：8

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