Pion electric polarizability from lattice QCD

Journal Article · Fri Jan 22 00:00:00 EST 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4938619· OSTI ID:22499030

Alexandru, Andrei; Lujan, Michael; Freeman, Walter; Lee, Frank ^[1]

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1. The George Washington University, 725 21st St. NW, Washington DC, 20052 (United States)

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.

• OSTI ID: 22499030
• Journal Information: AIP Conference Proceedings, Vol. 1701, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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