نتایج جستجو برای: b meson
تعداد نتایج: 908529 فیلتر نتایج به سال:
Results on heavy quark fragmentation obtained using the SLD detector at the SLAC Linear Collider are presented. This talk will cover the ratio of vector to pseudoscalar charmed meson production, the inclusive B hadron energy distribution, the inclusive particle production in heavy jets compared to their production in light jets, and charged and neutral B meson lifetimes.
We report the direct observation of the excited L=1 state B_(s2)(*) in fully reconstructed decays to B+K-. The mass of the B_(s2)(*) meson is measured to be 5839.6+/-1.1(stat)+/-0.7(syst) MeV/c(2), and its production rate relative to the B+ meson is measured to be [1.15+/-0.23(stat)+/-0.13(syst)]%.
The ratio of the $B^0_s$ and $B^0$ fragmentation fractions, $f_s/f_d$, in proton-proton collisions at LHC, is obtained as a function $B$-meson transverse momentum collision centre-of-mass energy from combined analysis different $B$-decay channels measured by LHCb experiment. results are described linear meson momentum, or with inspired Tsallis statistics. Precise measurements branching fraction...
The ratio of the $B^0_s$ and $B^0$ fragmentation fractions, $f_s/f_d$, in proton-proton collisions at LHC, is obtained as a function $B$-meson transverse momentum collision centre-of-mass energy from combined analysis different $B$-decay channels measured by LHCb experiment. results are described linear meson momentum, or with inspired Tsallis statistics. Precise measurements branching fraction...
The B c a meson is the ground state of the meson family formed by two different heavy flavor quarks, the anti-b quark and the c quark. The mass of the B c meson has been estimated theoretically to be in a range of 6.2-6.4 GeV/c [2]. Recently unquenched lattice QCD [3] gave the most accurate prediction of M(B c ) = 6278(6)(4) MeV/c , where the first error is statistical, and the second is system...
Hyperfine interactions in the light meson and baryon sectors are generalized to the charm and bottom systems. It is pointed out that an attempt to increase the value of the wave function at the origin to account for the unusual ratio of Λb to the B lifetimes could spoil the good agreement among the baryon and meson hyperfine mass–splitting. Including spin effects and taking phase space differen...
We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of Upsilon(4S) decays collected in 2001, bringing the data available to 32 x 10(6) BB macro pairs. We select events in which one neutral B meson is fully reconstructed in a final state containin...
We present an improved measurement of CP-violating asymmetries in B 0 → π + π − decays based on a 78 fb −1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. We reconstruct one neutral B meson as a B 0 → π + π − CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From the asymmetry in the di...
We investigated the possibility of testing factorization hypothesis in nonleptonic exclusive decays of B-meson. In particular, we considered the nonfactorizable B 0 → D(∗)+D s modes and B → D(∗)+(π−, ρ) known as well-factorizable modes. By taking the ratios B(B → D(∗)+D s )/B(B → D(∗)+(π−, ρ)), we found that under the present theoretical and experimental uncertainties there’s no evidence for th...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید