The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 1 Issue 1/2 (1998) pp 321-331

theoretical physics:
Single meson photoproduction and IR renormalons

Shahin S. Agaev (a)

International Centre for Theoretical Physics, I-34014 Trieste, Italy

Received: 18 November 1996 / Revised version: 18 April 1997

Abstract. Single pseudoscalar and vector mesons hard semi-inclusive photoproduction $\gamma h\rightarrow MX$ via higher twist mechanism is calculated using the QCD running coupling constant method. It is proved that in the context of this method a higher twist contribution to the photoproduction cross section cannot be normalized in terms of the meson electromagnetic form factor. The structure of infrared renormalon singularities of the higher twist subprocess cross section and the resummed expression (the Borel sum) for it are found. Comparisons are made with earlier results, as well as with leading twist cross section. Phenomenological effects of studied contributions for $\pi, K, \rho$-meson photoproduction are discussed.

(a) Permanent address: High Energy Physics Lab., Baku State University, Z.Khalilov st. 23, 370148 Baku, Azerbaijan. E-mail: azhep@lan.ab.az

Article in PDF-Format
Article in (gzipped) PS-Format

Online publication: December 11, 1997
helpdesk@link.springer.de
© Springer-Verlag Berlin Heidelberg 1998