Lifetimes of heavy hadrons beyond leading logarithms

Conference · Thu Sep 19 00:00:00 EDT 2002

OSTI ID:801272

Nierste, Ulrich

The lifetime splitting between the B{sup +} and B{sub d}{sup 0} mesons has recently been calculated in the next-to-leading order of QCD. These corrections are necessary for a reliable theoretical prediction, in particular for the meaningful use of hadronic matrix elements computed with lattice QCD. Using results from quenched lattice QCD we find {tau}(B{sup +})/{tau}(B{sub d}{sup 0}) = 1.053 {+-} 0.016 {+-} 0.017, where the uncertainties from unquenching and 1/m{sub b} corrections are not included. The lifetime difference of heavy baryons {Xi}{sub b}{sup 0} and {Xi}{sub b}{sup -} is also discussed.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 801272
• Report Number(s): FERMILAB-Conf-02/209-T; TRN: US0205324
• Resource Relation: Conference: Continuous Advances in QCD 2002/ARKADYFEST, Minneapolis, MN (US), 05/17/2002--05/23/2002; Other Information: PBD: 19 Sep 2002
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
FORECASTING
HADRONS
LIFETIME
MATRIX ELEMENTS
MESONS
QUANTUM CHROMODYNAMICS