Hadronic transitions from the lattice



Michael, C
(2004) Hadronic transitions from the lattice. Nuclear Physics B - Proceedings Supplements, 128. pp. 153-162.

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Abstract

I discuss strategies to determine hadronic decay couplings from lattice studies. As a check of the methods, I explore the decay of a vector meson to two pseudoscalar mesons with N-f = 2 flavours of sea quark. Although we are working with quark masses that do not allow a physical decay, I show how the transition rate can be evaluated from the amplitude for rho --> pipi and from the annihilation component of pipi --> pipi. I explore the decay amplitude for two different pion momenta and find consistent results. The coupling strength found is in agreement with experiment. I also find evidence for a shift in the rho mass caused by mixing with two pion states. I also present results for the decay of a hybrid meson, for the case of heavy valence quarks.

Item Type: Article
Additional Information: LTH 604. arXiv Number: arXiv:hep-lat/0310010v1. Available online 27 April 2004. February 2004.
Uncontrolled Keywords: QUANTUM-FIELD THEORIES, VOLUME DEPENDENCE, ENERGY-SPECTRUM, STATES, MESONS, PARTICLE
Subjects: ?? QC ??
Divisions: Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User: Symplectic Admin
Date Deposited: 20 Nov 2008 10:07
Last Modified: 17 Dec 2022 01:18
DOI: 10.1016/s0920-5632(03)02472-1
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/501