{vert_bar}V{sub ub}{vert_bar} from semileptonic decay and b {r_arrow} s{gamma}
Conference
·
OSTI ID:768527
- Fermilab
Current errors on {vert_bar}V{sub ub}{vert_bar} are dominated by model dependence. For inclusive decays, the model dependence comes from the Fermi motion of the b quark. By combining the endpoint photon and lepton spectra from the inclusive decays B {r_arrow} X{sub s}{gamma} and B {r_arrow} X{sub u}{ell}{bar {nu}}, it is possible to remove this model dependence. We show how to combine these rates including the resummation of the end-point logs at next to leading order. The theoretical errors on {vert_bar}V{sub ub}{vert_bar} on the order of 10% are possible. We also give a brief discussion on comparing different extractions.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 768527
- Report Number(s):
- FERMILAB-Conf-00/298-T
- Country of Publication:
- United States
- Language:
- English
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