Phenomenological study of heavy hadron lifetimes
نویسندگان
چکیده
منابع مشابه
A Phenomenological Analysis of Heavy Hadron Lifetimes
A phenomenological analysis of lifetimes of bottom and charmed hadrons within the framework of the heavy quark expansion is performed. The baryon matrix element is evaluated using the bag model and the nonrelativistic quark model. We find that bottom-baryon lifetimes follow the pattern τ(Ωb) ' τ(Ξ − b ) > τ(Λb) ' τ(Ξ 0 b). However, neither the lifetime ratio τ(Λb)/τ(Bd) nor the absolute decay r...
متن کاملLifetimes of Heavy Flavors*
This paper reviews recent experimental results on the lifetimes of the tau lepton and charmed and &flavored hadrons, and discusses the physical significance of these measurements. Presented at the Physics in Collision IV Conference Santa Cruz, California, August 22 24, 1984 * Work supported by the Department of Energy, contract DE-AC03-76SF00515.
متن کاملPhenomenological Analysis of D Meson Lifetimes
The QCD-based operator-product-expansion technique is systematically applied to the study of charmed meson lifetimes. We stress that it is crucial to take into account the momentum of the spectator light quark of charmed mesons, otherwise the destructive Pauli-interference effect in D+ decays will lead to a negative decay width for the D+. We have applied the QCD sum rule approach to estimate t...
متن کاملLifetimes of Heavy Hadrons *
We review current status of theoretical predictions of lifetimes of heavy hadrons in heavy-quark expansion. We present a calculation of subleading 1/m b corrections to spectator effects in the ratios of beauty hadron lifetimes. We find that these effects are sizable and should be taken into account in systematic analyses of heavy hadron lifetimes. In particular, the inclusion of 1/m b correctio...
متن کاملPattern of Lifetimes of Beauty Hadrons and Quark-hadron Duality in Heavy Quark Expansion
In the heavy quark limit, the inclusive decay rate of weakly decaying heavy hadron (HQ) can be expressed in an expansion of the weak matrix elements in powers of 1/mQ, where mQ is the heavy quark mass . (In this article, though we discuss generally for a heavy system, b or c but quantitatively refer only to beauty case). At the leading order, the hadronic decay rate is given by the free heavy q...
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: Journal of High Energy Physics
سال: 2018
ISSN: 1029-8479
DOI: 10.1007/jhep11(2018)014