Rearranging Pionless Effective Field Theory
We point out a redundancy in the operator structure of the pionless effective field theory which dramatically simplifies computations. This redundancy is best exploited by using dibaryon fields as fundamental degrees of freedom. In turn, this suggests a new power counting scheme which sums range corrections to all orders. We explore this method with a few simple observables: the deuteron charge form factor, n p -> d gamma, and Compton scattering from the deuteron. Higher dimension operators involving electroweak gauge fields are not renormalized by the s-wave strong interactions, and therefore do not scale with inverse powers of the renormalization scale. Thus, naive dimensional analysis of these operators is sufficient to estimate their contribution to a given process.
- 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:
- 839254
- Report Number(s):
- JLAB-THY-00-63; DOE/ER/40150-3336; nucl-th/0011067; NUPABL; TRN: US0501713
- Journal Information:
- Nuclear Physics, A, Vol. 694; Other Information: PBD: 19 Nov 2001; ISSN 0375-9474
- Country of Publication:
- United States
- Language:
- English
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