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Title: How the axial anomaly controls flavor mixing among mesons

Journal Article · · Physical Review D

Here, it is well known that, because of the axial anomaly in QCD, mesons with JP = 0 are close to SU(3)V eigenstates; the η'(958) meson is largely a singlet, and the η meson an octet. In contrast, states with JP = 1 are flavor diagonal; e.g., the Φ(1020) is almost pure ¯ss. Using effective Lagrangians, we show how this generalizes to states with higher spin, assuming that they can be classified according to the unbroken chiral symmetry of Gfl = SU(3)L × SU(3)R. We construct effective Lagrangians from terms invariant under Gfl and introduce the concept of hetero- and homochiral multiplets. Because of the axial anomaly, only terms invariant under the Z(3)A subgroup of the axial U(1)A enter. For heterochiral multiplets, which begin with that including the η and η'(958), there are Z(3)A invariant terms with low mass dimension which cause states to mix according to SU(3)V flavor. For homochiral multiplets, which begin with that including the Φ(1020), there are no Z(3)A invariant terms with low mass dimension, and so states are diagonal in flavor. In this way, we predict the flavor mixing for the heterochiral multiplet with spin 1 as well as for hetero- and homochiral multiplets with spin 2 and spin 3.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
1438293
Alternate ID(s):
OSTI ID: 1462430
Report Number(s):
BNL-207869-2018-JAAM; PRVDAQ; 091901
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 9; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (5)

Role of a four-quark and a glueball state in pion-pion and pion-nucleon scattering journal April 2019
Dynamical generation of field mixing via flavor vacuum condensate journal August 2019
Study of unflavored light mesons with J P C = 2 journal March 2019
Quark and glue spectroscopy of scalars and pseudoscalars in SU(3) flavor limit journal March 2019
Trace and Axial Anomalies on Equal Footing journal January 2020

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