CHIRAL PREDICTION FOR THE PI-N S-WAVE SCATTERING LENGTH-A(-) TO ORDER-O(M(PI)(4))

Authors
BERNARD V KAISER N MEISSNER UG
Citation
V. Bernard et al., CHIRAL PREDICTION FOR THE PI-N S-WAVE SCATTERING LENGTH-A(-) TO ORDER-O(M(PI)(4)), Physical review. C. Nuclear physics, 52(4), 1995, pp. 2185-2187
Citations number
16
Categorie Soggetti
Physics, Nuclear
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
52
Issue
4
Year of publication
1995
Pages
2185 - 2187
Database
ISI
SICI code
0556-2813(1995)52:4<2185:CPFTPS>2.0.ZU;2-7
Abstract
We evaluate the S-wave pion-nucleon scattering length alpha(-) in the framework of heavy baryon chiral perturbation theory up-to-and-includi ng terms of order M(pi)(4). We show that the order M(pi)(4) piece of t he isovector amplitude at threshold, T-thr(-), vanishes exactly. We pr edict for the isovector scattering length, 0.088M(pi+)(-1)less than or equal to alpha(-)less than or equal to 0.0.96M(pi+)(-1).