|V_ub| AND |V_cb|, CHARM COUNTING AND LIFETIME DIFFERENCES IN INCLUSIVE BOTTOM HADRON DECAYS

Abstract

Inclusive bottom hadron decays are analyzed based on the heavy quark effective field theory (HQEFT). Special attentions in this paper are paid to the b → u transitions and nonspectator effects. As a consequence, the CKM quark mixing matrix elements |V ub | and |V cb | are reliably extracted from the inclusive semileptonic decays B → X u eν and B → X c eν. Various observables, such as the semileptonic branch ratio B SL , the lifetime differences among B − , B 0 , B s and Λ b hadrons, the charm counting n c , are predicted and found to be consistent with the present experimental data.

1/mQ corrections to B→ρlν decay and Wang1, Wu2, Zhong3 2005Physics Letters B4180View full textAdd to dashboardCite

“…It is 12) where the first and second errors correspond to the experimental and theoretical uncertainties, respectively. This value may be compared with the ones previously obtained [10,11,13,16,26]. From the exclusive semileptonic decays B → π(ρ)lν, we then have…”

Power Scaling Rules for Charmonia Production and Hqeft

“…Let us note that such pieces are not generally neither used nor shown in similar developments in the literature, with a few exceptions [13,14,8,9].…”

“…In NRQCD, besides Λ QCD , there are (at least) another two low-energy scales: m Q v ′ (soft) and m Q v ′ 2 (ultrasoft) 1 . Recently, several applications of HQET involving both heavy quark and antiquark fields altogether to the study of the phenomenology of the weak and strong interactions have appeared in the literature ( [8,9] and [10], respectively). At the same time it becomes suitable a careful survey of the foundations on which such a theoretical framework is based.…”

Large Component QCD and Theoretical Framework of Heavy Quark Effective Field Theory

“…k 0 ∼ |k| ∼Λ m Q ), then LCQCD can be treated as a heavy quark effective field theory (HQEFT) 4,5 via the heavy quark expansion in terms of 1/m Q , which has been applied to deal with heavy-light hadron systems. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] The leading term of effective Lagrangian in HQEFT characterizes the behavior of heavy quarks in the infinite mass limit [20][21][22][23] and coincides with the standard one 24 which explicitly displays the heavy quark spin-flavor symmetry. [25][26][27][28][29][30] The effective Lagrangian in HQEFT 4,5 differs from the widely used one in the literatures b which was shown to be constructed based on the assumption that particle and antiparticle numbers are separately conserved.…”