The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms

Details The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms

2002-02-12

arxiv.org/abs/hep-ph/0202106v1

Nucl.Phys.B639:389-407,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, LaTeX

Scientific paper

10.1016/S0550-3213(02)00561-8

We compute perturbative QCD corrections to the lifetime splitting between the charged and neutral $B$ meson in the framework of the heavy quark expansion. These next-to-leading logarithmic corrections are necessary for a meaningful use of hadronic matrix elements of local operators from lattice gauge theory. We find the uncertainties associated with the choices of renormalization scale and scheme significantly reduced compared to the leading-order result. We include the full dependence on the charm-quark mass $m_c$ without any approximations. Using hadronic matrix elements estimated in the literature with lattice QCD we obtain $\tau(B^+)/\tau(B^0_d)=1.053\pm 0.027\pm 0.017$, where the effects of unquenching and $1/m_b$ corrections are not yet included. The lifetime difference of heavy baryons $\Xi^0_b$ and $\Xi^-_b$ is also briefly discussed.

Affiliated with

Also associated with

No associations

Rating

The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms 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^+ B_d^0 Lifetime Difference Beyond Leading Logarithms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The B^+ B_d^0 Lifetime Difference Beyond Leading Logarithms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-620976