Computational Modelling Group

B-meson coupling with relativistic heavy quarks

1st August 2009
Research Team
Ben Samways, Dirk Broemmel, Patrick Fritzsch
Jonathan Flynn

Three-point correlation function as computed on the lattice

The B*Bpi coupling is a fundamental parameter in the heavy meson chiral Lagrangian. This is an effective theory of QCD describing the interaction between heavy-light mesons and pions. The effective coupling furthermore constrains the chiral behavior of the B-meson decay constant, bag-parameter and the B->(pi,l,nu) form factor in the soft pion limit. Thus it is crucial in the process of estimating these physical quantities using lattice QCD methods.

Our lattice calculations treat the heavy quark with the so-called Relativistic Heavy Quark (RHQ) action and the light quarks in the Domain Wall Fermion formalism with its improved chiral properties.

The calculations are performed within the UKQCD and RBC collaborations.


Physical Systems and Engineering simulation: QCD

Algorithms and computational methods: Finite volume, Lattice Field Theory, Monte Carlo, Multi-scale

Visualisation and data handling software: Gnuplot

Software Engineering Tools: Emacs, Git

Programming languages and libraries: C, C++, Chroma, Fortran, GSL, MPI, OpenMP, Python, UKHadron

Computational platforms: Iridis, Linux

Transdisciplinary tags: HPC, Scientific Computing