Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-01-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 7 figures
Scientific paper
We study the weak-decay constants for the heavy pseudoscalar mesons, D, Ds, B, and Bs. For this purpose, we employ the extended nonlocal chiral-quark model (ExNLChQM), motivated by the heavy-quark effective field theory as well as the instanton-vacuum configuration. In addition to the heavy-quark symmetry and the nonlocal interactions between quarks and pseudoscalar mesons in ExNLChQM, a correction for the strange-quark content inside Ds and Bs is also taken into account and found to be crucial to reproduce the empirical values. From those numerical results, we obtain f_{D,Ds,B,Bs}=(207.53, 262.56, 208.13, 262.39) MeV, which are in good agreement with experimental data and other theoretical estimations. Using those numerical results, we compute the CKM matrix elements and the Cabibbo angle, using various mesonic and leptonic heavy-meson decay channels, resulting in (|V_{cd}|,|V_{cs}|,|V_{ub}|,|V_{td}|/|V_{ts}|)=(0.224,0.968,<5.395*10^{-3},0.215) and theta_C=12.36^o which are well compatible with available data.
No associations
LandOfFree
Heavy pseudoscalar-meson decay constants and CKM matrix elements from the extended nonlocal chiral-quark model 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 Heavy pseudoscalar-meson decay constants and CKM matrix elements from the extended nonlocal chiral-quark model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy pseudoscalar-meson decay constants and CKM matrix elements from the extended nonlocal chiral-quark model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-253516