B and D meson decay constants from 2+1 flavor improved staggered simulations

2011/12/16 by E. T. Neil, Jon A. Bailey, Neil, E. T. +44 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1112.3978

openalex publication_date 2011/12/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We give an update on simulation results for the decay constants f_B, f_Bs, f_D and f_Ds. These decay constants are important for precision tests of the standard model, in particular entering as inputs to the global CKM unitarity triangle fit. The results presented here make use of the MILC (2+1)-flavor asqtad ensembles, with heavy quarks incorporated using the clover action with the Fermilab method. Partially quenched, staggered chiral perturbation theory is used to extract the decay constants at the physical point. In addition, we give error projections for a new analysis in progress, based on an extended data set.

Cited by

• Standard Model Heavy Flavor physics on the Lattice

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