Axial and pseudoscalar current correlators and their couplings to eta and eta(') mesons

Singh, Janardan P and Pasupathy, J (2009) Axial and pseudoscalar current correlators and their couplings to eta and eta(') mesons. In: Physical review d, 79 (11). 116005-1-116005-15.

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Abstract

Correlators of singlet and octet axial currents, as well as anomaly and pseudoscalar densities have been studied using QCD sum rules. Several of these sum rules are used to determine the couplings f(eta)(8),f(eta)(0), f(eta)('8) and f(eta)('0). We find mutually consistent values which are also in agreement with phenomenological values obtained from data on various decay and production rates. While most of the sum rules studied by us are independent of the contributions of direct instantons and screening correction, the singlet-singlet current correlator and the anomaly-anomaly correlator improve by their inclusion.

Item Type:	Journal Article
Publication:	Physical review d
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	10 Aug 2009 03:43
Last Modified:	19 Sep 2010 05:40
URI:	http://eprints.iisc.ac.in/id/eprint/22065

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