New Possibility of Solving the Problem of Lifetime Ratio $\tau ({\Lambda }_b)/\tau (B_d)$

Abstract

We discuss the problem of the large discrepancy between the observed lifetime ratio of ${\Lambda }_b$ to $B_d$ and the theoretical prediction obtained by the heavy quark effective theory. A new possibility of solving this problem is proposed from the viewpoint of operator product expansion and the lifetime ratio of ${\Omega }_b$ to $B_d$ is predicted.

LaTeX file (11 pages). The result is improved by including the 1/Δ^3 order corrections

Cited by in corpus (11)

• Observation of the doubly strange b baryon Omega_b-
• Precision measurement of the ratio of the ${\Lambda }_b^0$ to ${\overline{B}}^0$ lifetimes
• Precision measurement of the Lambda_b baryon lifetime
• Phenomenological Study of Heavy Hadron Lifetimes
• Nonspectator Effects and B Meson Lifetimes from a Field-theoretic Calculation
• Measurement of the mass and lifetime of the ${\Omega }_b^{-}$ baryon
• Measurement of the ${\Xi }_b^{-}$ and ${\Omega }_b^{-}$ baryon lifetimes
• Quark-hadron duality at work: lifetimes of bottom baryons
• Reanalysis of the Four-Quark Operators Relevant to Λ_b Lifetime from QCD Sum Rule
• Lifetimes of some $b$-flavored hadrons
• Mixing Angle of ${\Xi }_Q-{\Xi }_Q^{\prime }$ in Heavy Quark Effective Therory