Effects of Flavor Dependence on Weak Decays ofJ/ψandϒ

Abstract

We carry out a detailed analysis of effects of flavor dependence of average transverse quark momentum inside a meson onJ/ψ→Pandϒ→Bctransition form factors and two-body weak hadronic decays ofJ/ψandϒemploying the factorization scheme. We predict the branching ratios of semileptonic and nonleptonic weak decays ofJ/ψandϒmesons in Cabibbo-angle-enhanced and Cabibbo-angle-suppressed modes.

J/ψ→Ds,dπ,DSun1, Yang2, Chang3 et al. 2016Phys. Rev. D6050View full textAdd to dashboardCite

“…In Refs. [22][23][24], the form factor A 0 is evaluated with the Wirbel-StechBauer model [38]. In Ref.…”

“…[22,23,40] are based on naive factorization approximation. Nonfactorizable effects from HME are considered with the QCDF scheme in Ref.…”

“…Recently, many QCD-inspired methods have been developed, such as the pQCD approach [8][9][10], the QCD factorization (QCDF) approach [14][15][16], the soft and collinear effective theory [17][18][19][20], and have been applied preferably to accommodate measurements on nonleptonic B decays. Based on collinear approximation, the J/ψ → DP decays have been studied with naive factorization [21][22][23] and the QCDF approach [24], where theoretical results differ mainly from hadronic input parameters. In this paper, the J/ψ → D s,d P decays will be studied with the pQCD approach based on k T factorization.…”

Study on theΥ(1S)→BcMWeak Decays

“…and and the other depicting the production of the state from the vacuum. Previous works, such as [21] based on the spin symmetry and nonrecoil approximation, [22] based on the heavy quark effective theory, and [23] based on the BauerStech-Wirbel (BSW) model [24], concentrated mainly upon the Υ(1 ) → transition form factors which are related to the space integrals of the meson wave functions. As is well known, there exist hierarchical scales with nonrelativistic quantum chromodynamics (NRQCD) [25][26][27] which is an approach to deal with the heavy quarkonium; that is, [12,13], where nonfactorizable contributions could be estimated systematically with the perturbation theory based on collinear factorization approximation and power countering rules in the heavy quark limit [13], and the QCDF approach has been widely applied to nonleptonic meson decays.…”

Search for the rare decaysJ/ψ→Ds−ρ+andAblikim1, Ачасов2, Ai3 et al. 2014Phys. Rev. D

“…With the prospect of high-statistics J=ψ samples, theoretical calculations of the branching fractions of two-body hadronic weak decays of J=ψ → DP=DV, where D represents a charmed meson and P and V the pseudoscalar and vector mesons, respectively, have been performed [7][8][9][10][11][12]. The branching fractions of J=ψ → D − s ρ þ and J=ψ →D 0KÃ0 are predicted to be higher than those of J=ψ → D − s π þ and J=ψ →D 0K0 , e.g., the relative ratio [12].…”