Publication

Measurement of the branching fractions for B- → D ()+π-ℓ-v̄ℓ and B̄0 → D()0π+ℓ -v̄ℓ

Stewart Cole, Vladislav Balagura, Sun Hee Kim
2005
Journal Articles

Abstract

We report on a measurement of the branching fractions for B- → D()+π- ℓ -v̄ℓ and B̄0 → D ()0π+ℓ-v̄ℓ with 275 × 106 BB̄ events collected at the γ(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain B(B- → D+π- ℓ-v̄ℓ = (0.54±0.07(stat)±0.07(syst)±0.06(BR))× 10 -2, B(B- → D()+π- ℓ-v̄ℓ = (0.67 ±0.11(stat) ±0.09(syst) ±0.03(BR)) × 10-2, B(B̄0 → D0π+ ℓ -v̄ℓ) = (0.33 ±0.06(stat) ± 0.06(syst) ±0.03(BR)) × 10-2, B(B̄0 → D()0π+ℓ -v̄ℓ) = (0.65 ±0.12(stat) ± 0.08(syst) ±0.05(BR)) × 10-2, where the third error comes from the error on B̄ → D()ℓ -v̄ℓ decays. Contributions from B0 → D()+ℓ-v̄ℓ decays are excluded in the measurement of B̄0 → D0π +ℓ-v̄ℓ. © 2005 The American Physical Society.

Official source

https://infoscience.epfl.ch/entities/publication/f1aa5c60-7270-41fa-9770-a0fe691f321a

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Stewart Cole, Vladislav Balagura, Sun Hee Kim
2005
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f1aa5c60-7270-41fa-9770-a0fe691f321a

About this result

Related concepts (32)

B meson

In particle physics, B mesons are mesons composed of a bottom antiquark and either an up (_B+), down (_B0), strange (_Strange B0) or charm quark (_Charmed B+). The combination of a bottom antiquark and a top quark is not thought to be possible because of the top quark's short lifetime. The combination of a bottom antiquark and a bottom quark is not a B meson, but rather bottomonium, which is something else entirely. Each B meson has an antiparticle that is composed of a bottom quark and an up (_B-), down (_AntiB0), strange (_Strange antiB0) or charm (_Charmed b-) antiquark respectively.

Meson

In particle physics, a meson (ˈmiːzɒn,_ˈmɛzɒn) is a type of hadronic subatomic particle composed of an equal number of quarks and antiquarks, usually one of each, bound together by the strong interaction. Because mesons are composed of quark subparticles, they have a meaningful physical size, a diameter of roughly one femtometre (10^−15 m), which is about 0.6 times the size of a proton or neutron. All mesons are unstable, with the longest-lived lasting for only a few tenths of a nanosecond.

Rho meson

In particle physics, a rho meson is a short-lived hadronic particle that is an isospin triplet whose three states are denoted as _Rho+, _Rho0 and _Rho-. Along with pions and omega mesons, the rho meson carries the nuclear force within the atomic nucleus. After the pions and kaons, the rho mesons are the lightest strongly interacting particle, with a mass of 775.45MeV for all three states. The rho mesons have a very short lifetime and their decay width is about 145MeV with the peculiar feature that the decay widths are not described by a Breit–Wigner form.

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