منابع مشابه
Measurement of the B production asymmetry and the CP asymmetry in B → J=ψK decays
s p 1⁄4 7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range 2 < pT < 30 GeV=c, and rapidities in the range 2.1 < y < 4.5 are measured to be AprodðBþ; ffiffi s p 1⁄4 7 TeVÞ 1⁄4 ð−0.41 0.49 0.10Þ × 10−2, AprodðBþ; ffiffi s p 1⁄4 8 TeVÞ 1⁄4 ð−0.53 0.31 0.10Þ × 10−2, where the first uncertainties are statistical and the second are systematic. These production as...
متن کاملAsymmetry studies in Λ 0 / Λ̄ 0 , Ξ − / Ξ + and Ω − / Ω + production
We present a study on hyperon/anti-hyperon production asymmetries in the framework of the recombination model. The production asymmetries for Λ/Λ̄, Ξ/Ξ and Ω/Ω are studied as a function of xF . Predictions of the model are compared to preliminary data on hyperon/anti-hyperon production asymmetries in 500 GeV/c π−p interactions from the Fermilab E791 experiment. The model predicts a growing asymm...
متن کاملInclusive Semileptonic B and Polarized Λb Decays from QCD
The differential decay spectrum dΓ/dEedq 2 for the semileptonic decay of an unpolarized hadron containing a b-quark, and the decay spectrum dΓ/dEedq dcos θ for polarized Λb decay are computed to second order in the 1/mb expansion. Most of the 1/m 2 b corrections have a simple physical interpretation, which is discussed in detail. The implications of the results for the determination of Vub are ...
متن کاملΛ b Decays into Λ - Vector
A complete study of the angular distributions of the processes, Λ b → ΛV (1 −), with Λ → pπ − and V (J/Ψ) → ℓ + ℓ − or V (ρ 0 , ω) → π + π − , is performed. Emphasis is put on the initial Λ b polarization produced in the proton-proton collisions. The polarization density-matrices as well as angular distributions are derived and help to construct T-odd observables which allow us to perform tests...
متن کاملRare Λ b → Λ l + l − Decays with Polarized Λ
We investigate the rare baryonic exclusive decays of Λb → Λll (l = e, μ, τ) with polarized Λ. Under the approximation of the heavy quark effective theory (HQET), in the standard model we derive the differential decay rates and various polarization asymmetries by including lepton mass effects. We find that with the long-distance effects the decay branching ratios are 5.3× 10 for Λb → Λll (l = e,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2014
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.90.014023