Work

Vacuum pseudoscalar susceptibility

Year: 2010

Type: article

Abstract: We derive a novel model-independent result for the pion susceptibility in QCD via the isovector-pseudoscalar vacuum polarization. In the neighbourhood of the chiral limit, the pion susceptibility can be expressed as a sum of two independent terms. The first expresses the pion-pole contribution. The second is identical to the vacuum chiral susceptibility, which describes the response of QCD's ground state to a fluctuation in the current-quark mass. In this result one finds a straightforward explanation of a mismatch between extant estimates of the pion susceptibility.

Source: Physical Review C

DOI: 10.1103/physrevc.81.032201

Authors: Lei Chang, Yu-Xin Liu, Craig D. Roberts, Yuan-Mei Shi, Wei-Min Sun, Hong-Shi Zong

Institutions: Institute of Applied Physics and Computational Mathematics, Peking University, State Key Laboratory of Nuclear Physics and Technology, Argonne National Laboratory, Nanjing Xiaozhuang University, Nanjing University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2047502693

FWCI: 1.466

Cites: 31

Cited by: 18

Related to: 10