The B_s and D_s decay constants in 3 flavor lattice QCD

Details The B_s and D_s decay constants in 3 flavor lattice QCD The B_s and D_s decay constants in 3 flavor lattice QCD

2003-11-10

arxiv.org/abs/hep-ph/0311130v1

Phys.Rev.Lett.92:162001,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages

Scientific paper

10.1103/PhysRevLett.92.162001

Capitalizing on recent advances in lattice QCD, we present a calculation of the leptonic decay constants f_{B_s} and f_{D_s} that includes effects of one strange sea quark and two light sea quarks. The discretization errors of improved staggered fermion actions are small enough to simulate with 3 dynamical flavors on lattices with spacings around 0.1 fm using present computer resources. By shedding the quenched approximation and the associated lattice scale ambiguity, lattice QCD greatly increases its predictive power. NRQCD is used to simulate heavy quarks with masses between 1.5 m_c and m_b. We arrive at the following results: f_{B_s} = 260 \pm 7 \pm 26 \pm 8 \pm 5 MeV and f_{D_s} = 290 \pm 20 \pm 29 \pm 29 \pm 6 MeV. The first quoted error is the statistical uncertainty, and the rest estimate the sizes of higher order terms neglected in this calculation. All of these uncertainties are systematically improvable by including another order in the weak coupling expansion, the nonrelativistic expansion, or the Symanzik improvement program.

Affiliated with

Also associated with

No associations

Rating

The B_s and D_s decay constants in 3 flavor lattice QCD 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 The B_s and D_s decay constants in 3 flavor lattice QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The B_s and D_s decay constants in 3 flavor lattice QCD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-421488