scholarly journals Study of theψ(1S,2S)andηc(1S,2S)Weak Decays intoDM

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Junfeng Sun ◽  
Yueling Yang ◽  
Jinshu Huang ◽  
Lili Chen ◽  
Qin Chang
Keyword(s):  
Branching Ratios ◽  
Light Meson ◽  
Heavy Flavor ◽  
Final States ◽  
Charmed Meson ◽  
Matrix Elements ◽  
High Luminosity ◽  
Factorization Approach ◽  
Weak Decays ◽  
Qcd Factorization

Inspired by the recent measurements on theJ/ψ(1S)→Dsρ,DuK⁎weak decays at BESIII and the potential prospects of charmonium at high-luminosity heavy-flavor experiments, we studyψ(1S,2S)andηc(1S,2S)weak decays into final states including one charmed meson plus one light meson, considering QCD corrections to hadronic matrix elements with QCD factorization approach. It is found that the Cabibbo-favoredψ(1S,2S)→Ds-ρ+,Ds-π+,D¯u0K¯⁎0decays have large branching ratios≳10-10, which might be accessible at future experiments.

scholarly journals J/ψ → DP, DV decays in the QCD factorization approach

2015 ◽  
Vol 30 (16) ◽  
pp. 1550094 ◽  
Author(s):  
Junfeng Sun ◽  
Lili Chen ◽  
Qin Chang ◽  
Jinshu Huang ◽  
Yueling Yang
Keyword(s):  
Branching Ratios ◽  
Radiative Corrections ◽  
Heavy Flavor ◽  
Matrix Elements ◽  
High Luminosity ◽  
Factorization Approach ◽  
Weak Decays ◽  
Qcd Factorization ◽  
Near Future

Motivated by the recent measurements on nonleptonic J/ψ weak decays at BESIII and the potential prospects of J/ψ meson at the high-luminosity heavy-flavor experiments, the branching ratios of the two-body nonleptonic J/ψ → DP, DV decays are estimated quantitatively by considering the QCD radiative corrections to hadronic matrix elements with the QCD factorization approach. It is found that the Cabibbo favored [Formula: see text], [Formula: see text], [Formula: see text] decays have branching ratios ≳ 10-10, which might be promisingly detectable in the near future.

scholarly journals Study on theΥ(1S)→BcMWeak Decays

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Junfeng Sun ◽  
Lili Chen ◽  
Na Wang ◽  
Qin Chang ◽  
Jinshu Huang ◽  
...  
Keyword(s):  
Branching Ratio ◽  
Heavy Flavor ◽  
Matrix Elements ◽  
High Luminosity ◽  
Weak Decays ◽  
The Future

Motivated by the prospects of the potentialΥ(1S)particle at high-luminosity heavy-flavor experiments, we studied theΥ(1S)→BcMweak decays, whereM=π,ρ,K(∗). The nonfactorizable contributions to hadronic matrix elements are taken into consideration with the QCDF approach. It is found that the CKM-favoredΥ(1S)→Bcρdecay has branching ratio ofO(10-10), which might be measured promisingly by the future experiments.

B→J/ψρ DECAY WITHIN QCD FACTORIZATION APPROACH

2011 ◽  
Vol 26 (40) ◽  
pp. 3041-3054 ◽  
Author(s):  
MAHBOOBEH SAYAHI ◽  
HOSSEIN MEHRABAN
Keyword(s):  
Experimental Data ◽  
B Meson ◽  
Factorization Method ◽  
Branching Ratios ◽  
Light Meson ◽  
Hadronic Decays ◽  
Factorization Approach ◽  
Qcd Factorization ◽  
Effective Coefficients

In this paper, the hadronic decays B+→J/ψρ+ and B0→J/ψρ0 have been analyzed in "QCD factorization" method. The effective coefficients [Formula: see text] have been calculated for three helicity states (h = 0, +, -) which given three contributions of amplitude. We have assumed two scenarios for J/ψ. First, we have considered that J/ψ behaves as a light meson in comparison with B-meson and in other scenario, we have considered mass of J/ψ in our calculations. The branching ratios are calculated in these conditions and also in different energy scales. The obtained results are in agreement with available experimental data at second scenario and μ = mb/2.

scholarly journals Study of nonleptonic B(s)∗→ M1M2 (M = D,Ds,π,K) weak decays with factorization approach

2015 ◽  
Vol 30 (27) ◽  
pp. 1550162 ◽  
Author(s):  
Qin Chang ◽  
Pan-Pan Li ◽  
Xiao-Hui Hu ◽  
Lin Han
Keyword(s):  
Flavor Physics ◽  
Branching Fractions ◽  
Form Factors ◽  
Approximation Formula ◽  
Heavy Flavor ◽  
Transition Form ◽  
Factorization Approach ◽  
Decay Modes ◽  
Weak Decays ◽  
Belle Ii

Motivated by the experiments of heavy flavor physics at running LHC and upgrading SuperKEKB/Belle-II in the future, the nonleptonic [Formula: see text] [Formula: see text] weak decays are studied in this paper. The amplitudes are calculated with factorization approach, and the transition form factors [Formula: see text] are evaluated within BSW model. With the reasonable approximation [Formula: see text], our predictions of branching fractions are presented. Numerically, the CKM-favored tree-dominated [Formula: see text] and [Formula: see text] decays have the largest branching fractions of the order [Formula: see text], and hence will be firstly observed by forthcoming Belle-II experiment. However, most of the other decay modes have the branching fractions [Formula: see text] and thus are hardly to be observed soon. Besides, for the possible detectable [Formula: see text] decays with branching fractions [Formula: see text], some useful ratios, such as [Formula: see text], etc. are presented and discussed in detail.

scholarly journals Contributions from $${\Phi }_{B2}$$ to the B $${\rightarrow }$$ PP decays within the QCD factorization

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
Qin Chang ◽  
Lili Chen ◽  
Yunyun Zhang ◽  
Junfeng Sun ◽  
Yueling Yang
Keyword(s):  
Theoretical Calculation ◽  
Measurement Precision ◽  
Distribution Amplitude ◽  
Factorization Approach ◽  
Weak Decays ◽  
Qcd Factorization ◽  
Pseudoscalar Mesons

AbstractWith the potential for the improvements of measurement precision, the refinement of theoretical calculation on hadronic B weak decays is necessary. In this paper, we study the contributions of B mesonic distribution amplitude $${\Phi }_{B2}$$ΦB2 within the QCD factorization approach, and find that $${\Phi }_{B2}$$ΦB2 contributes to only the nonfactorizable annihilation amplitudes for the B$${\rightarrow }$$→PP decays (P denotes the ground SU(3) pseudoscalar mesons). Although small, the $${\Phi }_{B2}$$ΦB2 contributions might be helpful for improving the performance of the QCD factorization approach, especially for the pure annihilation $$B_{d}$$Bd$${\rightarrow }$$→$$K^{+}K^{-}$$K+K- and $$B_{s}$$Bs$${\rightarrow }$$→$${\pi }^{+}{\pi }^{-}$$π+π- decays.

B0 → J/ψf2(1270) decay in QCD factorization

2012 ◽  
Vol 90 (12) ◽  
pp. 1201-1208 ◽  
Author(s):  
Mahboobeh Sayahi ◽  
Hossein Mahraban
Keyword(s):  
Experimental Data ◽  
B Meson ◽  
Factorization Method ◽  
Branching Ratios ◽  
Hadronic Decay ◽  
Light Meson ◽  
Qcd Factorization ◽  
Effective Coefficients

In this paper, the hadronic decay B0 → J/ψf2(1270) has been analyzed using the “QCD factorization” method. The effective coefficients [Formula: see text] have been calculated for three helicity states (h = 0, +, –) which give three contributions of amplitude. We have assumed two scenarios for J/ψ. First, we have considered that J/ψ behaves as a light meson compared to the B meson and second, we have considered the mass of J/ψ in our calculations meaning that mJ/ψ/mb is held fixed. The branching ratios are calculated in these two scenarios and also in different energy scales (μ = mb, μ = mb/2, and μ = 2mb). The obtained results are in agreement with available experimental data for the second scenario and μ = 2mb.

scholarly journals Study of the Υ(1S) → DP decays

2021 ◽  
pp. 2150061
Author(s):  
Yueling Yang ◽  
Mingfei Duan ◽  
Junliang Lu ◽  
Jinshu Huang ◽  
Junfeng Sun
Keyword(s):  
Standard Model ◽  
Perturbative Qcd ◽  
Branching Ratios ◽  
New Physics ◽  
High Luminosity ◽  
Weak Decays ◽  
The Standard Model

Inspired by the potential prospects of high-luminosity dedicated colliders and the high enthusiasms in searching for new physics in the flavor sector at the intensity frontier, the [Formula: see text], [Formula: see text] and [Formula: see text] weak decays are studied with the perturbative QCD approach. It is found within the standard model that the branching ratios for the concerned processes are tiny, about [Formula: see text], and far beyond the detective ability of current experiments unless there exists some significant enhancements from a novel interaction.

scholarly journals NONLEPTONIC ANNIHILATION DECAYS OF B MESON WITH A NATURAL INFRARED CUTOFF

2009 ◽  
Vol 24 (22) ◽  
pp. 4133-4155 ◽  
Author(s):  
A. A. NATALE ◽  
C. M. ZANETTI
Keyword(s):  
Systematic Study ◽  
B Mesons ◽  
B Meson ◽  
Coupling Constants ◽  
Final States ◽  
B Decays ◽  
Factorization Approach ◽  
Infrared Behavior ◽  
Qcd Factorization ◽  
Infrared Cutoff

Within the QCD factorization approach we compute the amplitudes for pure annihilation channels of B mesons decays into final states containing two pseudoscalar particles. These decays may be plagued by effects like nonperturbative physics and breaking of the factorization hypothesis and imply, at some extent, the introduction of an infrared cutoff in the calculation of amplitudes. We compute the decays with the help of infrared finite gluon propagators and coupling constants that were obtained in different solutions of the QCD Schwinger–Dyson equations. These solutions yield a natural cutoff for the amplitudes, and we argue that a systematic study of these B decays may provide a test for the QCD infrared behavior.

Study of Υ(nS) → Bcρ and BcK∗ decays within the QCD factorization

2016 ◽  
Vol 31 (38) ◽  
pp. 1650209
Author(s):  
Qin Chang ◽  
Yunyun Zhang ◽  
Lin Han
Keyword(s):  
Large Hadron Collider ◽  
Quantum Chromodynamics ◽  
Branching Fractions ◽  
Hadron Collider ◽  
Heavy Flavor ◽  
Leading Order ◽  
Text Data ◽  
Weak Decays ◽  
Qcd Factorization ◽  
Belle Ii

Motivated by the heavy-flavor experiments at running Large Hadron Collider (LHC) and upgrading SuperKEKB, which provide abundant [Formula: see text] data samples, the tree-dominated [Formula: see text] and [Formula: see text] (n =1, 2, 3) weak decays are studied within the framework of quantum chromodynamics (QCD) factorization. The QCD corrections to the longitudinal and transverse amplitudes are evaluated at next-to-leading order, and the branching fractions and polarization fractions are predicted. Numerically, the [Formula: see text] decays have relatively large branching fractions at the order of [Formula: see text] and are in the scope of the LHC and SuperKEKB/Belle-II experiments.

QCD IN HADRONIC B DECAYS

2007 ◽  
Vol 22 (07n10) ◽  
pp. 615-621 ◽  
Author(s):  
CAI-DIAN LÜ
Keyword(s):  
Perturbative Qcd ◽  
Form Factors ◽  
Branching Ratios ◽  
Final States ◽  
Charmed Meson ◽  
B Decays ◽  
Cp Asymmetry ◽  
Charmless B Decays ◽  
The Right ◽  
Asymmetry Parameters

The perturbative QCD approach is based on kT factorization, including the Sudakov form factors so that to avoid the endpoint singularity. In this approach, we calculate the charmless B decays like B → ππ decays etc. to produce the right number of branching ratios and also CP asymmetry parameters. For final states with at least one charmed meson, like B → Dπ decays, our results also agree with the experiments.

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