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Title: Pion electric polarizability from lattice QCD

Electromagnetic polarizabilities are important parameters for understanding the interaction between photons and hadrons. For pions these quantities are poorly constrained experimentally since they can only be measured indirectly. New experiments at CERN and Jefferson Lab are planned that will measure the polarizabilities more precisely. Lattice QCD can be used to compute these quantities directly in terms of quark and gluons degrees of freedom, using the background field method. We present results for the electric polarizability for two different quark masses, light enough to connect to chiral perturbation theory. These are currently the lightest quark masses used in polarizability studies.
Authors:
; ; ;  [1]
  1. The George Washington University, 725 21st St. NW, Washington DC, 20052 (United States)
Publication Date:
OSTI Identifier:
22499030
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CEBAF ACCELERATOR; CERN; CHIRALITY; D QUARKS; DEGREES OF FREEDOM; GLUONS; MASS; PERTURBATION THEORY; PHOTONS; PIONS; POLARIZABILITY; QUANTUM CHROMODYNAMICS; U QUARKS