منابع مشابه
Semileptonic Λ b decay to excited Λ c baryons at order Λ QCD
Exclusive semileptonic Λb decays to excited charmed Λc baryons are investigated at order ΛQCD/mQ in the heavy quark effective theory. The differential decay rates are analyzed for the Jπ = 1/2− Λc(2593) and the J π = 3/2− Λc(2625). They receive 1/mc,b corrections at zero recoil that are determined by mass splittings and the leading order Isgur-Wise function. With some assumptions, we find that ...
متن کاملExcited Λ Q Baryons in the Large N c Limit ⋆
The spectrum of excited ΛQ-type heavy baryons is considered in the largeNc limit. The universal form factors for Λb semileptonic decay to excited charmed baryons are calculated in the large Nc limit. We find that the Bjorken sum rule (for the slope of the Isgur–Wise function) and Voloshin sum rule (for the mass of the light degrees of freedom) are saturated by the first doublet of excited ΛQ st...
متن کامل0 Asymmetries in the Production of Λ + c and Λ − c Baryons in 500 GeV / c π − Nucleon Interactions
E. M. Aitala , S. Amato , J. C. Anjos , J. A. Appel , D. Ashery , S. Banerjee , I. Bediaga , G. Blaylock , S. B. Bracker , P. R. Burchat, R. A. Burnstein , T. Carter , H. S. Carvalho , N. K. Copty , L. M. Cremaldi , C. Darling , K. Denisenko , S. Devmal , A. Fernandez , G. F. Fox , P. Gagnon , C. Gobel , K. Gounder , A. M. Halling , G. Herrera , G. Hurvits , C. James , P. A. Kasper , S. Kwan , ...
متن کاملO ct 2 00 1 On polarization of strange baryons in reactions p + p → p + Λ 0 + K + and p + p → p + Σ 0 + K + near thresholds
Polarization properties of strange baryons produced in pp reactions, p + p → p + Λ0 + K+ and p + p → p + Σ0 + K+, near thresholds of the final states pΛ0K+ and pΣ0K+ are analysed relative to polarizations of colliding protons. The cross sections for pp reactions are calculated within the effective Lagrangian approach accounting for strong pp rescattering in the initial state of colliding proton...
متن کاملObservation of Λ + c → Λ 0 K + , Λ + c → Σ 0 K + and Λ + c → Σ + K + π − decays
We present measurements of the Cabibbo-suppressed decays Λc → Λ 0K+ and Λc → Σ 0K+ (both first observations), Λc → Σ +K+π− (seen with large statistics for the first time), Λc → pK +K− and Λc → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λc → Σ +K+K− and Λc → Σ +φ, which are attributed to W-exchange diagrams, are shown. We also present the first evi...
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ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2009
ISSN: 1674-1137
DOI: 10.1088/1674-1137/33/12/047