Analysis of four-body decay of D meson

2017 ◽  
Vol 32 (02n03) ◽  
pp. 1750011
Author(s):  
T. Estabar ◽  
H. Mehraban
Keyword(s):  
D Meson ◽  
Experimental Information ◽  
Factorization Approach ◽  
Decay Modes ◽  
Qcd Factorization ◽  
Pion Interaction ◽  
Scalar Resonance ◽  
Experimental Values ◽  
Three Body ◽  
Computation Analysis

The aim of this work is to provide a phenomenological analysis of the contribution of [Formula: see text] meson to [Formula: see text], [Formula: see text] and [Formula: see text] quasi-three-body decays. Such that the analysis of mentioned four-body decays is summarized into three-body decay and several channels are observed. Based on the factorization approach, hadronic three-body decays receive both resonant and nonresonant contributions. We compute both contributions of three-body decays. As, there are tree, penguin, emission, and emission annihilation diagrams for these decay modes. Our theoretical model for [Formula: see text] decay is based on the QCD factorization to quasi-two body followed by [Formula: see text]-wave. This model for this decay following experimental information which demonstrated two pion interaction in the [Formula: see text]-wave is introduced by the scalar resonance. The theoretical values are [Formula: see text], [Formula: see text] and [Formula: see text], while the experimental results of them are [Formula: see text], [Formula: see text] and [Formula: see text], respectively. Comparing computation analysis values with experimental values show that our results are in agreement with them.

scholarly journals Studies of Three-Body Decay ofBtoJ/ψηKandB(Bs)toηcπK*

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Behnam Mohammadi ◽  
Hossein Mehraban
Keyword(s):  
Form Factor ◽  
Dalitz Plot ◽  
Decay Constant ◽  
Transition Matrix Element ◽  
Experimental Results ◽  
Factorization Approach ◽  
Decay Modes ◽  
Qcd Factorization ◽  
Plot Analysis ◽  
Three Body

We investigate theB0→J/ψηK0andB+→J/ψηK+decay by using the Dalitz plot analysis. As we know there are tree, penguin, emission, and emission-annihilation diagrams for these decay modes in the factorization approach. The transition matrix element is factorized into aB→ηKform factor multiplied byJ/ψdecay constant and also aB→Kform factor multiplied byJ/ψηdecay constant. According to QCD factorization approach and using the Dalitz plot analysis, we calculate the branching ratios of theB0→J/ψηK0andB+→J/ψηK+three-body decay in view of theη-η'mixing and obtain the value of the(9.22-1.47+2.67)×10-5, while the experimental results of them are(8±4)×10-5and(10.8±3.3)×10-5, respectively. In this research we also analyze theB(Bs)→ηcπK*decay which is similar to the previous decay, but there is no experimental data for the last decay. Since for calculations of theB(Bs)→ηcπK*decay we use assumptions of theB→J/ψηKdecay, we hope that if this decay will be measured by the LHCb in the future, the experimental results will be in agreement with our calculations.

Three-body decays of Ds+ → η(η′)π+π0

2017 ◽  
Vol 32 (18) ◽  
pp. 1750110
Author(s):  
Amin Asadi ◽  
Hossein Mehraban ◽  
Zahra Shahryari
Keyword(s):  
Simple Model ◽  
Dalitz Plot ◽  
Branching Ratios ◽  
Experimental Results ◽  
Final State ◽  
Factorization Approach ◽  
Decay Modes ◽  
Plot Analysis ◽  
Experimental Values ◽  
Three Body

In this paper, we investigate the three-body decays of [Formula: see text] meson to [Formula: see text] and [Formula: see text] final state mesons, using a simple model based on the framework of the factorization approach. As we know, there are tree and emission-annihilation diagrams for these decay modes in the factorization approach. We calculate the total [Formula: see text] and [Formula: see text] branching ratios, including the nonresonant and resonances contributions, and in view of the [Formula: see text] mixing, by applying the Dalitz plot analysis and obtain [Formula: see text] and [Formula: see text], while the experimental values are [Formula: see text] and [Formula: see text], respectively. The branching ratios obtained in our model are partly compatible with the experimental results.

Resonant and non-resonant contributions of B → K∗(p1,𝜖1){Kπ,ππ,KK} decay modes

2019 ◽  
Vol 34 (06) ◽  
pp. 1950043
Author(s):  
Mahboobeh Sayahi
Keyword(s):  
Experimental Data ◽  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Branching Ratio ◽  
Heavy Meson ◽  
Chiral Perturbation ◽  
Decay Modes ◽  
Qcd Factorization ◽  
Three Body ◽  
Good Agreement

In this paper, the non-leptonic three-body decays [Formula: see text], [Formula: see text], [Formula: see text] are studied by introducing two-meson distribution amplitude for the [Formula: see text], [Formula: see text] and [Formula: see text] pairs in naive and QCD factorization (QCDF) approaches, such that the analysis is simplified into quasi-two body decays. By considering that the vector meson is being ejected in factorization, the resonant and non-resonant contributions are analyzed by using intermediate mesons in Breit–Wigner resonance formalism and the heavy meson chiral perturbation theory (HMChPT), respectively. The calculated values of the resonant and non-resonant branching ratio of [Formula: see text], [Formula: see text] and [Formula: see text] decay modes are compared with the experimental data. For [Formula: see text] and [Formula: see text], the non-resonant contributions are about 70–80% of experimental data, for which the total results by considering resonant contributions are in good agreement with the experiment.

scholarly journals Radiative three-body D-meson decays in and beyond the standard model

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
Nico Adolph ◽  
Joachim Brod ◽  
Gudrun Hiller
Keyword(s):  
Standard Model ◽  
D Meson ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Charm Decays ◽  
Qcd Factorization ◽  
Heavy Hadron ◽  
The Standard Model ◽  
Cabibbo Suppressed ◽  
Three Body

AbstractWe study radiative charm decays $$D \rightarrow P_1 P_2 \gamma $$ D → P 1 P 2 γ , $$P_{1,2}=\pi ,K$$ P 1 , 2 = π , K in QCD factorization at leading order and within heavy hadron chiral perturbation theory. Branching ratios including resonance contributions are around $$\sim 10^{-3}$$ ∼ 10 - 3 for the Cabibbo-favored modes into $$K \pi \gamma $$ K π γ and $$\sim 10^{-5}$$ ∼ 10 - 5 for the singly Cabibbo-suppressed modes into $$\pi ^+ \pi ^- \gamma , K^+ K^- \gamma $$ π + π - γ , K + K - γ , and thus in reach of the flavor factories BES III and Belle II. Dalitz plots and forward–backward asymmetries reveal significant differences between the two QCD frameworks; such observables are therefore ideally suited for a data-driven identification of relevant decay mechanisms in the standard-model dominated $$D \rightarrow K \pi \gamma $$ D → K π γ decays. This increases the potential to probe new physics with the $$D \rightarrow \pi ^+ \pi ^- \gamma $$ D → π + π - γ and $$D \rightarrow K^+ K^- \gamma $$ D → K + K - γ decays, which are sensitive to enhanced dipole operators. CP asymmetries are useful to test the SM and look for new physics in neutral $$|\Delta C|=1$$ | Δ C | = 1 transitions. Cuts in the Dalitz plot enhance the sensitivity to new physics due to the presence of both s- and t, u-channel intermediate resonances.

scholarly journals CONSTRAINTS ON B→π, K TRANSITION FORM-FACTORS FROM EXCLUSIVE SEMILEPTONIC D-MESON DECAYS

2011 ◽  
Vol 26 (19) ◽  
pp. 3185-3199 ◽  
Author(s):  
FANG SU ◽  
YA-DONG YANG
Keyword(s):  
Phenomenological Study ◽  
B Meson ◽  
D Meson ◽  
Form Factors ◽  
Transition Form ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Meson Decays ◽  
Central Values ◽  
Qcd Factorization

According to the heavy-quark flavor symmetry, the B→π, K transition form-factors could be related to the corresponding ones of D-meson decays near the zero recoil point. With the recent precisely measured exclusive semileptonic decays D →πℓν and D→K ℓν, we perform a phenomenological study of B →π, K transition form-factors based on this symmetry. Using BK, BZ and Series Expansion parametrizations of the form-factor slope, we extrapolate B →π, K transition form-factors from [Formula: see text] to q2 = 0. It is found that, although being consistent with each other within error bars, the central values of our results for B →π, K form-factors at q2 = 0, [Formula: see text], are smaller than predictions of the QCD light-cone sum rules, but are in good agreements with the ones extracted from hadronic B-meson decays within the SCET framework. Moreover, smaller form-factors are also favored by the QCD factorization approach for hadronic B-meson decays.

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

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
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).

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.

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