Effects of an extra U(1) axial condensate on the strong decays of pseudoscalar mesons

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.074007· OSTI ID:21537710

Meggiolaro, Enrico ^[1]

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1. Dipartimento di Fisica, Universita di Pisa, and INFN, Sezione di Pisa, Largo Pontecorvo 3, I-56127 Pisa (Italy)

We consider a scenario (supported by some lattice results) in which a U(1)-breaking condensate survives across the chiral transition in QCD. This scenario has important consequences for the pseudoscalar-meson sector, which can be studied using an effective Lagrangian model. In particular, generalizing the results obtained in two previous papers, where the effects on the radiative decays {eta}, {eta}{sup '{yields}{gamma}{gamma}} were studied, in this paper we study the effects of the U(1) chiral condensate on the strong decays of the ''light'' pseudoscalar mesons, i.e., {eta}, {eta}{sup '}{yields}3{pi}{sup 0}; {eta}, {eta}{sup '}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}; {eta}{sup '}{yields}{eta}{pi}{sup 0}{pi}{sup 0}; {eta}{sup '}{yields}{eta}{pi}{sup +}{pi}{sup -}; and also on the strong decays of an exotic (''heavy'') SU(3)-singlet pseudoscalar state {eta}{sub X}, predicted by the model.

• OSTI ID: 21537710
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 7; Other Information: DOI: 10.1103/PhysRevD.83.074007; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
CONDENSATES
LAGRANGIAN FUNCTION
PARTICLE DECAY
PIONS MINUS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
RADIATIVE DECAY
SU-3 GROUPS
SYMMETRY BREAKING
U-1 GROUPS
BOSONS
DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
FUNCTIONS
HADRONS
LIE GROUPS
MESONS
PARTICLE PROPERTIES
PIONS
QUANTUM FIELD THEORY
SU GROUPS
SYMMETRY GROUPS
U GROUPS