Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-10-03
Nucl.Phys.Proc.Suppl.128:153-162,2004
Physics
High Energy Physics
High Energy Physics - Lattice
10 pages, 7 ps figures, proc LHP03, Cairns
Scientific paper
10.1016/S0920-5632(03)02472-1
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 $\rho \to \pi \pi$ and from the annihilation component of $\pi \pi \to \pi \pi$. 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.
No associations
LandOfFree
Hadronic transitions from the lattice does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hadronic transitions from the lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hadronic transitions from the lattice will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-571090