Analysis of Br(anti-B ---> X(s gamma)) at NNLO with a cut on photon energy
By combining a recent estimate of the total {bar B} {yields} X{sub s}{gamma} branching fraction at O({alpha}{sub s}{sup 2}) with a detailed analysis of the effects of a cut E{sub {gamma}} {ge} 1.6 GeV on photon energy, a prediction for the partial {bar B} {yields} X{sub s}{gamma} branching fraction at next-to-next-to-leading order in renormalization-group improved perturbation theory is obtained, in which contributions from all relevant scales are properly factorized. The result Br({bar B} {yields} X{sub s}{gamma}) = (2.98 {+-} 0.26) {center_dot} 10{sup -4} is about 1.4{sigma} lower than the experimental world average. This opens a window for significant New Physics contributions in rare radiative B decays.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 900002
- Report Number(s):
- FERMILAB-PUB-06-364-T; arXiv eprint number hep-ph/0610067; TRN: US0702132
- Journal Information:
- Phys.Rev.Lett.98:022003,2007, Journal Name: Phys.Rev.Lett.98:022003,2007
- Country of Publication:
- United States
- Language:
- English
Similar Records
First measurement of sigma (p anti-p ---> Z) . Br (Z ---> tau tau) at s**(1/2) = 1.96- TeV
Measurement of the Ratio of Branching Fractions Br(B$0\atop{s}$ → D$-\atop{s}$ π+)/Br(B0 → D- π+) at CDF-II