Hadronic decay of a vector meson from the lattice

Collaboration, UKQCD, McNeile, C and Michael, C (2002) Hadronic decay of a vector meson from the lattice. Phys.Lett.B, 556 (3-4). pp. 177-184.

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Abstract

We explore the decay of a vector meson to two pseudoscalar mesons on the lattice 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 $\rho \to \pi \pi$ and from the annihilation component of $\pi \pi \to \pi \pi$. 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 $\rho$ mass caused by mixing with two pion states.

Item Type:	Article
Additional Information:	13 pages, version as accepted for Physics Letters B
Uncontrolled Keywords:	hep-lat, hep-lat
Subjects:	?? QC ??
Divisions:	Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	19 Aug 2008 13:22
Last Modified:	17 Dec 2022 01:14
DOI:	10.1016/s0370-2693(03)00130-8
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/529