Michael, C. and McNeile, C. (2004) Hadronic decays from the lattice. Nuclear Physics B - Proceedings Supplements, 129-130 . pp. 215-217. ISSN 0920-5632
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We discuss strategies to determine hadronic decay couplings from lattice studies. As an application, we 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, we show how the transition rate can be evaluated from the amplitude for p --> pipi and from the annihilation component of pipi --> pipi. We explore the decay amplitude for two different pion momenta and find consistent results. The coupling strength we find is in agreement with experiment. We also find evidence for a shift in the p mass caused by mixing with two pion states.
|Additional Information:||LTH595. arXiv Number: arXiv:hep-lat/0309073v1. Available online 29 April 2004. Issue: March 2004.|
|Uncontrolled Keywords:||QUANTUM-FIELD THEORIES; VOLUME DEPENDENCE; ENERGY-SPECTRUM; STATES|
|Subjects:||Q Science > QC Physics|
|Departments, Research Centres and Related Units:||Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences|
|Deposited On:||20 Nov 2008 11:23|
|Last Modified:||20 May 2011 13:00|
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