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Hadronic transitions from the lattice

Michael, C. (2004) Hadronic transitions from the lattice. Nuclear Physics B - Proceedings Supplements, 128 . pp. 153-162. ISSN 0920-5632

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Official URL: http://www.elsevier.com/wps/find/journaldescriptio...

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:Q Science > QC Physics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences
DOI:10.1016/S0920-5632(03)02472-1
Related URLs:
Refereed:No
Status:Published
ID Code:501
Deposited On:20 Nov 2008 10:07
Last Modified:20 May 2011 13:10

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