The Nuclear Central Force in the Chiral Limit
نویسنده
چکیده
Chiral perturbation theory supplemented by the Omnes function is employed to study the strength of the isoscalar central nuclear interaction, GS , in the chiral limit vs the physical case. A very large modification is seen , i.e. ηs = GS chiral/GS physical = 1.37 ± 0.10. This large effect is seen to arise dominantly at low energy from the extra contributions made by massless pions at energies near the physical threshold where the physical spectral function must vanish kinematically. The slope away from the chiral limit, dS , is also calculated and is correspondingly large. I also explain why this large variation is to be expected.
منابع مشابه
Nuclear forces in the chiral limit
We investigate the behaviour of the nuclear forces as a function of the light quark masses (or, equivalently, pion mass) in the framework of chiral effective field theory at next-to-leading order. The nucleon–nucleon force is described in terms of one and two–pion exchange and local short distance operators, which depend explicitly and implicitly on the quark masses. The pion propagator becomes...
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