scholarly journals Effects of Flavor Dependence on Weak Decays ofJ/ψandϒ

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Rohit Dhir ◽  
R. C. Verma ◽  
Avinash Sharma
Keyword(s):  
Detailed Analysis ◽  
Form Factors ◽  
Branching Ratios ◽  
Hadronic Decays ◽  
Cabibbo Angle ◽  
Transition Form ◽  
Factorization Scheme ◽  
Weak Decays ◽  
Quark Momentum

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.

WEAK DECAYS OF B−, $\bar{B}^0$ MESONS TO A PSEUDOSCALAR AND A SCALAR MESON IN THE FINAL STATE

1996 ◽  
Vol 11 (01) ◽  
pp. 129-139 ◽  
Author(s):  
A.C. KATOCH ◽  
R.C. VERMA
Keyword(s):  
Quark Model ◽  
Pseudoscalar Meson ◽  
Scalar Meson ◽  
Form Factors ◽  
Branching Ratios ◽  
Matrix Elements ◽  
Final State ◽  
Factorization Scheme ◽  
Weak Decays

Using the factorization scheme, we study two-body exclusive weak decays of B– and [Formula: see text] mesons to a pseudoscalar meson and a scalar meson in the final state. Employing the Isgur-Scora-Grinstein-Wise quark model to obtain the form factors involved in the decay matrix elements, we calculate the branching ratios for the decays involving b→c transition.

scholarly journals RARE DECAYS OF ψ AND ϒ

1999 ◽  
Vol 14 (06) ◽  
pp. 937-945 ◽  
Author(s):  
K. K. SHARMA ◽  
R. C. VERMA
Keyword(s):  
Rare Decays ◽  
Branching Ratios ◽  
Hadronic Decays ◽  
Cabibbo Angle ◽  
Factorization Scheme

We study two-body weak hadronic decays of ψ and ϒ employing the factorization scheme. Branching ratios for ψ → PP/PV and ϒ→ PP/PV decays in the Cabibbo-angle-enhanced and Cabibbo-angle-suppressed modes are predicted.

A detailed analysis ofD-,D s - andB-meson transition form factors and the determination of |V cb |

1990 ◽  
Vol 48 (4) ◽  
pp. 663-671 ◽  
Author(s):  
J. G. Körner ◽  
K. Schilcher ◽  
M. Wirbel ◽  
Y. L. Wu
Keyword(s):  
Detailed Analysis ◽  
Form Factors ◽  
Transition Form

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 Charmed $$\Omega _c$$ weak decays into $$\Omega $$ in the light-front quark model

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
Yu-Kuo Hsiao ◽  
Ling Yang ◽  
Chong-Chung Lih ◽  
Shang-Yuu Tsai
Keyword(s):  
Quark Model ◽  
Recent Observation ◽  
Branching Fractions ◽  
Form Factors ◽  
Weak Decay ◽  
Current Data ◽  
Light Front ◽  
Transition Form ◽  
Decay Modes ◽  
Weak Decays

AbstractMore than ten $$\Omega _c^0$$ Ω c 0 weak decay modes have been measured with the branching fractions relative to that of $$\Omega ^0_c\rightarrow \Omega ^-\pi ^+$$ Ω c 0 → Ω - π + . In order to extract the absolute branching fractions, the study of $$\Omega ^0_c\rightarrow \Omega ^-\pi ^+$$ Ω c 0 → Ω - π + is needed. In this work, we predict $${{\mathcal {B}}}_\pi \equiv {{\mathcal {B}}}(\Omega _c^0\rightarrow \Omega ^-\pi ^+)=(5.1\pm 0.7)\times 10^{-3}$$ B π ≡ B ( Ω c 0 → Ω - π + ) = ( 5.1 ± 0.7 ) × 10 - 3 with the $$\Omega _c^0\rightarrow \Omega ^-$$ Ω c 0 → Ω - transition form factors calculated in the light-front quark model. We also predict $${{\mathcal {B}}}_\rho \equiv {{\mathcal {B}}}(\Omega _c^0\rightarrow \Omega ^-\rho ^+)=(14.4\pm 0.4)\times 10^{-3}$$ B ρ ≡ B ( Ω c 0 → Ω - ρ + ) = ( 14.4 ± 0.4 ) × 10 - 3 and $${{\mathcal {B}}}_e\equiv {{\mathcal {B}}}(\Omega _c^0\rightarrow \Omega ^-e^+\nu _e)=(5.4\pm 0.2)\times 10^{-3}$$ B e ≡ B ( Ω c 0 → Ω - e + ν e ) = ( 5.4 ± 0.2 ) × 10 - 3 . The previous values for $${{\mathcal {B}}}_\rho /{{\mathcal {B}}}_\pi $$ B ρ / B π have been found to deviate from the most recent observation. Nonetheless, our $${{\mathcal {B}}}_\rho /{{\mathcal {B}}}_\pi =2.8\pm 0.4$$ B ρ / B π = 2.8 ± 0.4 is able to alleviate the deviation. Moreover, we obtain $${{\mathcal {B}}}_e/{{\mathcal {B}}}_\pi =1.1\pm 0.2$$ B e / B π = 1.1 ± 0.2 , which is consistent with the current data.

Cabibbo-angle-favored two-body hadronic decays ofDs+in the factorization scheme

1993 ◽  
Vol 48 (11) ◽  
pp. 5215-5225 ◽  
Author(s):  
A. N. Kamal ◽  
Q. P. Xu ◽  
A. Czarnecki
Keyword(s):  
Hadronic Decays ◽  
Cabibbo Angle ◽  
Factorization Scheme

scholarly journals The transition form factors for semi-leptonic weak decays of J/ψ in QCD sum rules

2008 ◽  
Vol 54 (1) ◽  
pp. 107-121 ◽  
Author(s):  
Yu-Ming Wang ◽  
Hao Zou ◽  
Zheng-Tao Wei ◽  
Xue-Qian Li ◽  
Cai-Dian Lü
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Transition Form ◽  
Qcd Sum Rules ◽  
Weak Decays

scholarly journals D → a1, f1 transition form factors and semileptonic decays via 3-point QCD sum rules

2016 ◽  
Vol 31 (20n21) ◽  
pp. 1650116 ◽  
Author(s):  
Yabing Zuo ◽  
Yue Hu ◽  
Linlin He ◽  
Wei Yang ◽  
Yan Chen ◽  
...  
Keyword(s):  
Sum Rules ◽  
Axial Vector ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Branching Ratios ◽  
Transition Form ◽  
Vector Mesons ◽  
Qcd Sum Rules ◽  
The Future ◽  
Spin Triplet

By using the 3-point QCD sum rules, we calculate the transition form factors of [Formula: see text] decays into the spin triplet axial vector mesons [Formula: see text], [Formula: see text], [Formula: see text]. In the calculations, we consider the quark contents of each meson in detail. In view of the fact that the isospin of [Formula: see text] is one, we calculate the [Formula: see text] and [Formula: see text] transition form factors separately. In the case of [Formula: see text], [Formula: see text], the mixing between light flavor [Formula: see text] singlet and octet is taken into account. Based on the form factors obtained here, we give predictions for the branching ratios of relevant semileptonic decays, which can be tested in the future experiments.

scholarly journals The weak decay $$B_c$$ to Z(3930) and X(4160) by Bethe–Salpeter method

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
Zhi-Hui Wang ◽  
Yi Zhang ◽  
Tianhong Wang ◽  
Yue Jiang ◽  
Guo-Li Wang
Keyword(s):  
Phenomenological Study ◽  
Form Factors ◽  
Branching Ratios ◽  
Weak Decay ◽  
Wave Functions ◽  
Overlap Integrals ◽  
Weak Decays ◽  
Relativistic Corrections

Abstract Considering Z(3930) and X(4160) as $$\chi _{c2}(2P)$$χc2(2P) and $$\chi _{c2}(3P)$$χc2(3P) states, the semileptonic and nonleptonic of $$B_c$$Bc decays to Z(3930) and X(4160) are studied by the improved Bethe–Salpeter (B–S) Method. The form factors of decay are calculated through the overlap integrals of the meson wave functions in the whole accessible kinematical range. The influence of relativistic corrections are considered in the exclusive decays. Branching ratios of $$B_c$$Bc weak decays to Z(3930) and X(4160) are predicted. Some of the branching ratios are: $$Br(B_c^+\rightarrow Z(3930)e^+\nu _e)=(3.03^{+0.09}_{-0.16})\times 10^{-4}$$Br(Bc+→Z(3930)e+νe)=(3.03-0.16+0.09)×10-4 and $$Br(B_c^+\rightarrow X(4160)e^+\nu _e)=(3.55^{+0.83}_{-0.35})\times 10^{-6}$$Br(Bc+→X(4160)e+νe)=(3.55-0.35+0.83)×10-6. These results may provide useful information to discover Z(3930) and X(4160) and the necessary information for the phenomenological study of $$B_c$$Bc physics.

STUDY OF TWO-BODY HADRONIC DECAYS OF Λb BARYON IN THE HEAVY QUARK EFFECTIVE THEORY

1999 ◽  
Vol 14 (30) ◽  
pp. 4735-4747
Author(s):  
RUKMANI MOHANTA
Keyword(s):  
Vector Meson ◽  
Additional Assumption ◽  
Branching Ratio ◽  
Branching Ratios ◽  
Decay Process ◽  
Effective Theory ◽  
Hadronic Decays ◽  
Heavy Quark Effective Theory ◽  
Weak Decays ◽  
Asymmetry Parameters

We investigate the two-body nonleptonic weak decays of Λb baryon into a Λc baryon and a pseudoscalar or vector meson in the framework of HQET. With the additional assumption of factorization the branching ratios and asymmetry parameters for various decay processes [Formula: see text] are obtained. Treating the s quark as heavy we have also applied HQET to study the decay process Λb→ΛJ/ψ and the estimated branching ratio for this process is lying within the present experimental limits.

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