Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD

Details Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD

2008-12-19

arxiv.org/abs/0812.3747v2

Phys.Rev.D79:031503,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures, a few comments,a table and references added, version to appear in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.79.031503

The correlation function of two pseudoscalar charmed quark currents with a positive hadronic spectral density is employed to obtain upper bounds on the decay constants of $D$ and $D_s$ mesons. Including all known terms of the operator-product-expansion of this correlation function in QCD and taking into account the estimated uncertainties, we obtain $f_{D}<230 $ MeV and $f_{D_s}<270$ MeV. Comparison with the decay constants determined from $D\to l \nu_l$ and $D_s\to l \nu_l$ measurements, reveals a tension between the bound and current experimental value of $f_{D_s}$.

Affiliated with

Also associated with

No associations

Rating

Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in 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 Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-726969