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Title: B physics from the lattice
Author: Mehegan, John Charles
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1995
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Results are presented of a lattice calculation of fB, the leptonic decay constant of the B meson, and of BB, the "bag-parameter" of B0-B‾0) mixing. All the calculations are performed with the heavy quark constituent of the B meson treated in the static approximation and with an Π(a)-improved fermion action used for the light quarks. The calculations are performed in the quenched approximation on a 243 x 48 lattice at β = 6.2. In simulating the behaviour of B mesons on the lattice, one of the most important technical issues is how to correctly isolate the ground state. This is particularly the case when the static approximation is used. Hence several smeared interpolating operators for the B meson are used in these calculations and the results using the various operators are presented and compared. The main findings are with the greatest uncertainty in the final results coming from one-loop perturbative matching of the lattice and continuum operators.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available