Hard exclusive electroproduction of pions
Journal Article
·
· Eur.Phys.J. C10 (1999) 307-312
OSTI ID:755803
The authors investigate the exclusive electroproduction of {pi}{sup +} mesons from nucleons. To leading twist, leading order {alpha}{sub s} accuracy the corresponding production amplitude can be decomposed into pseudovector and pseudoscalar parts. Both can be expressed in terms of quark double distribution functions of the nucleon. While the pseudovector contribution is connected to ordinary polarized quark distributions, the pseudoscalar part can be related to one pion t-channel exchange. They observe that the pseudovector part of the production amplitude is important at x < 0.1. On the other hand, for 0.1 < x < 0.4 contributions from one pion exchange dominate.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 755803
- Report Number(s):
- DOE/ER/40150-1468; JLAB-THY-99-02; TUM/T39-98-33; hep-ph/9812467
- Journal Information:
- Eur.Phys.J. C10 (1999) 307-312, Journal Name: Eur.Phys.J. C10 (1999) 307-312
- Country of Publication:
- United States
- Language:
- English
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