Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-17
Phys.Lett. B625 (2005) 53-62
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 1 figure, 2 tables, revtex
Scientific paper
10.1016/j.physletb.2005.08.023
We study the Standard Model short-distance prediction for the mass and lifetime differences between the two neutral D meson mass eigenstates. We find that, despite \alpha_s/4\pi suppression, next-to-leading order (NLO) short-distance QCD corrections exceed the corresponding leading order (LO) amplitudes. For the lifetime difference, this stems from the lifting of helicity suppression of a light-quark intermediate state. We find y_D is given by y_NLO to a reasonable approximation but x_D is greatly affected by destructive interference between x_LO and x_NLO. The net effect is to render y_D ~ x_D ~ 6 x 10^{-7}. Our NLO short-distance results, still smaller than most long-distance estimates, depend on the same two nonperturbative matrix elements of four-quark operators as in leading order.
Golowich Eugene
Petrov Alexey A.
No associations
LandOfFree
Short Distance Analysis of D^0-anti-D^0 Mixing 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 Short Distance Analysis of D^0-anti-D^0 Mixing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short Distance Analysis of D^0-anti-D^0 Mixing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-459089