π- π Scattering Lengths and Chiral Condensate in NJL Model

1999/03/25 by Mei Huang, Huang, Mei, Pengfei Zhuang +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.hep-ph/9903485

1 RevTeX file, 9 pages with two tables

arxiv created 1999/03/25 · arxiv updated 2009/11/30

Abstract

Within the general framework of SU(2) Nambu-Jona-Lasinio model beyond mean-field approximation, the S-wave π- π scattering lengths a₀⁰ and a₀² are calculated. The numerical results are in agreement with that analyzed from recent experiment πN → ππN data by using Chew-Low-Goebel technique, and the corresponding chiral condensate < qq> is around -(250 \rm MeV)³, which is close to the ones obtained from lattice and sum rules.

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