6533b850fe1ef96bd12a81d7
RESEARCH PRODUCT
correction to ƒB
N.f. NasrallahKarl SchilcherY.l. Wusubject
Quantum chromodynamicsQuarkPhysicsNuclear and High Energy PhysicsParticle physicsMesonHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyHeavy quark effective theoryHigh Energy Physics::ExperimentLimit (mathematics)Charm (quantum number)Exponential decayNuclear ExperimentScalingdescription
Abstract The 1/m corrections to the B-meson decay constant ƒB (and the D-meson decay constant ƒD) of the heavy quark effective theory are calculated in the Green function approach. The corrections are found to be sensitive to the difference of the meson mass mB and the heavy quark mass mb. For mb=4.81 GeV we obtain a 100% correction to the heavy quark limit mb=mB. The scaling law of the ratio ƒB/ƒD is, however, quite well satisfied because of cancellations. For reasonable values of quark masses we obtain ƒ B = (130±20) MeV and ƒ D = (170±10) MeV .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-05-01 | Physics Letters B |