pi {sup 0} {yields} gamma gamma to NLO in CHPT
Conference
·
OSTI ID:824447
The pi 0 {yields} gamma gamma width is determined to next to leading order in the combined chiral and 1/Nc expansions. It is shown that corrections driven by chiral symmetry breaking produce an enhancement of about 4.5% with respect to the width calculated in terms of the chiral-limit amplitude leading to Gamma{sub {pi}}{sup 0} {yields} {gamma}{gamma} = 8.1 +/- 0.08 MeV. This theoretical prediction will be tested via pi 0 Primakoff production by the PRIMEX experiment at Jefferson Lab.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 824447
- Report Number(s):
- JLAB-THY-02-76; DOE/ER/40150-2676; TRN: US0402083
- Resource Relation:
- Conference: 9th International Conference On The Structure Of Baryons (Baryons 2002), Newport News, VA (US), 03/03/2002--03/08/2002; Other Information: PBD: 1 May 2003
- Country of Publication:
- United States
- Language:
- English
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