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

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.

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

International Journal of Modern Physics A ◽

10.1142/s0217751x15501626 ◽

2015 ◽

Vol 30 (27) ◽

pp. 1550162 ◽

Cited By ~ 6

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.

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Study ofB¯d,s⁎0→Dd,s+M-Decays with QCD Factorization Approach

Advances in High Energy Physics ◽

10.1155/2016/3863725 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Qin Chang ◽

Xiaohui Hu ◽

Zhe Chang ◽

Junfeng Sun ◽

Yueling Yang

Keyword(s):

Branching Fractions ◽

Longitudinal Polarization ◽

Factorization Approach ◽

Meson Decays ◽

Decay Modes ◽

Weak Decays ◽

Qcd Factorization ◽

Belle Ii ◽

Polarization States ◽

Physics Experiments

Motivated by theb-physics experiments at running LHC and upcoming SuperKEKB/Belle-II, the nonleptonicB¯q⁎0→Dq+M-(q=d,sandM=π,K,ρ,K⁎) weak decays are studied within QCD factorization framework. The observables of these decay modes are first predicted. It is found that the tree-dominated and CKM-favoredB¯q⁎0→Dq+ρ-decays have the largest branching fractions~O(10-8)and thus are hopefully to be measured. TheB¯q⁎0→Dq+V-decays are dominated by the longitudinal polarization states. In addition, associating with the relevantBmeson decays, some interesting phenomena and relations are discussed in detail; for example,RB≡B(B¯q→Dq⁎P)/B(B¯q⁎→DqP)≃3τB/τB⁎, andfL,∥(B¯q→Dq⁎V)≃fL,∥(B¯q⁎→DqV).

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Exploring color-octet scalar parameter space in minimal R-symmetric models

Journal of High Energy Physics ◽

10.1007/jhep11(2020)024 ◽

2020 ◽

Vol 2020 (11) ◽

Cited By ~ 1

Author(s):

Linda M. Carpenter ◽

Taylor Murphy ◽

Matthew J. Smylie

Keyword(s):

Large Hadron Collider ◽

Parameter Space ◽

Branching Fractions ◽

Hadron Collider ◽

Collider Phenomenology ◽

Decay Channels ◽

Color Octet ◽

Supersymmetric Models ◽

Three Body ◽

Displaced Vertex

Abstract In this work we study the collider phenomenology of color-octet scalars (sgluons) in minimal supersymmetric models endowed with a global continuous R symmetry. We systematically catalog the significant decay channels of scalar and pseudoscalar sgluons and identify novel features that are natural in these models. These include decays in nonstandard diboson channels, such as to a gluon and a photon; three-body decays with considerable branching fractions; and long-lived particles with displaced vertex signatures. We also discuss the single and pair production of these particles and show that they can evade existing constraints from the Large Hadron Collider, to varying extents, in large regions of reasonable parameter space. We find, for instance, that a 725 GeV scalar and a 350 GeV or lighter pseudoscalar can still be accommodated in realistic scenarios.

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Charmonia production in W → (cc̄)Ds(∗) decays

Modern Physics Letters A ◽

10.1142/s0217732321500589 ◽

2021 ◽

Vol 36 (09) ◽

pp. 2150058

Author(s):

A. V. Luchinsky ◽

A. K. Likhoded

Keyword(s):

Quantum Chromodynamics ◽

Light Cone ◽

Relativistic Quantum ◽

Branching Fractions ◽

Color Singlet ◽

Leading Order ◽

Paper Production ◽

Quantum Numbers ◽

Numerical Predictions ◽

State Formula

In this paper, production of charmonium state [Formula: see text] in exclusive [Formula: see text] decays is analyzed in the framework of both leading order Non-relativistic Quantum Chromodynamics (NRQCD) and light-cone (LC) expansion models. Analytical and numerical predictions for the branching fractions of these decays in both the approaches are given. The typical value of the branching fractions is [Formula: see text][Formula: see text][Formula: see text] and it turns out that the LC results are significantly larger than NRQCD ones (approximately two or four times increase depending on the quantum numbers of the final particles), so the effect of internal quark motion should be taken into account. Some rough estimates of color-octet contributions are presented and it is shown that these contributions could be comparable with color-singlet results.

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