Michael, C. (2004) Hadronic transitions from the lattice. Nuclear Physics B - Proceedings Supplements, 128 . pp. 153-162. ISSN 0920-5632
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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.
|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|
|Deposited On:||20 Nov 2008 10:07|
|Last Modified:||20 May 2011 13:10|
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