Work

Neutral pion polarizabilities from four-point functions in lattice QCD

Year: 2024

Type: article

Abstract: We report a proof-of-principle lattice QCD simulation of the electric and magnetic polarizabilities for a neutral pion in the four-point function method. The results are based on the same quenched Wilson ensembles on a 24 3 × 48 lattice at β = 6.0 with pion mass from 1100 to 370 MeV previously used for a charged pion. For electric polarizability, the results are largely consistent with those from the background field method and ChPT . In contrast, there are significant differences for magnetic polarizability among the four-point function method, the background field method, and ChPT . The situation points to the important role of disconnected diagrams for a neutral pion. We elucidate a transparent quark decomposition in the four-point function method that can be used to shed light on the issue.

Source: Nuclear Physics B

DOI: 10.1016/j.nuclphysb.2024.116701

Authors: Frank X. Lee, Walter Wilcox, Andrei Alexandru, Chris Culver, Shayan Nadeem

Institutions: George Washington University, Baylor University, University of Liverpool

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: Office of Science

OpenAlex ID: W4402895011

FWCI: 0.214

Cites: 27

Cited by: 3

Related to: 10