Weak decays of heavy mesons in a covariant quark model

2002 ◽  
Author(s):  
D. Merten
Keyword(s):  
Quark Model ◽  
Heavy Mesons ◽  
Weak Decays ◽  
Covariant Quark Model

Weak decays of heavy mesons in a covariant quark model

2002 ◽  
Vol 13 (4) ◽  
pp. 477-491 ◽  
Author(s):  
D. Merten ◽  
R. Ricken ◽  
M. Koll ◽  
B. Metsch ◽  
H.R. Petry
Keyword(s):  
Quark Model ◽  
Heavy Mesons ◽  
Weak Decays ◽  
Covariant Quark Model

scholarly journals B → K(∗)μ+μ− in covariant quark model

2015 ◽  
Vol 39 ◽  
pp. 1560113
Author(s):  
A. Liptaj ◽  
S. Dubnička ◽  
A. Z. Dubničková ◽  
M. A. Ivanov
Keyword(s):  
Beyond Standard Model ◽  
Standard Model ◽  
Quark Model ◽  
Rare Decays ◽  
Form Factors ◽  
New Physics ◽  
Angular Distributions ◽  
Heavy Mesons ◽  
Theoretical Predictions ◽  
Covariant Quark Model

The covariant quark model with infrared confinement (CQM) is a well-suited theoretical framework to describe large variety of hadronic processes, including rare decays of heavy mesons. In this text we focus on the reactions [Formula: see text], which have been recently measured by Refs. 1–4. The measurements include also information about the angular distributions and their significance is given by possible New Physics (NP) effects which are predicted in numerous beyond Standard Model (SM) scenarios. Even with clever choice of experimental observables, a model dependence cannot be fully removed from the theoretical predictions. In this text we present the computation of the [Formula: see text] form factors within the CQM and give results for some of the most commonly used observables ([Formula: see text], [Formula: see text]).

Description of Hadronic Effects in Weak Decays of Beauty Mesons Using Covariant Quark Model

2016 ◽  
Vol 9 (3) ◽  
pp. 575
Author(s):  
S. Dubnička ◽  
A. Liptaj ◽  
A.Z. Dubničková ◽  
M.A. Ivanov
Keyword(s):  
Quark Model ◽  
Weak Decays ◽  
Beauty Mesons ◽  
Covariant Quark Model

scholarly journals The weak decays of $\Xi^{(')}_{c}\to\Xi$ in the light-front quark model

2021 ◽  
Author(s):  
Hong-Wei Ke ◽  
Qing-Qing Kang ◽  
Xiao-Hai Liu ◽  
Xue-Qian 李学潜 Li
Keyword(s):  
Quark Model ◽  
Light Front ◽  
Weak Decays

THE CHIRAL QUARK MODEL AND BARYON PHENOMENOLOGY

2005 ◽  
Vol 20 (08n09) ◽  
pp. 1785-1790 ◽  
Author(s):  
D. O. RISKA
Keyword(s):  
Quark Model ◽  
Form Factors ◽  
Axial Current ◽  
Chiral Quark Model ◽  
Pion Decay ◽  
Decay Widths ◽  
Nucleon Form Factors ◽  
Baryon Spectra ◽  
Baryon Resonances ◽  
Covariant Quark Model

The chiral quark model posits that pions couple to the axial current of constituent quarks. This chiral pion coupling governs the pion decays of baryon resonances and also implies pion and multipion interactions between the quarks. The qualitative features of this model for the description of pionic decay widths and baryon spectra are outlined. When the covariant quark model wave function for the nucleon is chosen so as to describe the empirical nucleon form factors the pion decay widths of the positive parity resonances are underpredicted. This indicates the presence of significant multiquark components in these resonances.

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.

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