scholarly journals Study of Bs→ℓ+ℓ−γ decays in covariant quark model

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
S. Dubnička ◽  
A. Z. Dubničková ◽  
M. A. Ivanov ◽  
A. Liptaj ◽  
P. Santorelli ◽  
...  
Keyword(s):  
Quark Model ◽  
Covariant Quark Model

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 Description of hadrons with Covariant Quark Model

2014 ◽  
Vol 81 ◽  
pp. 05021
Author(s):  
A. Liptaj ◽  
M. A. Ivanov ◽  
S. Dubnička ◽  
A. Z. Dubničková
Keyword(s):  
Quark Model ◽  
Covariant Quark Model

scholarly journals Chiral dynamics of baryons in a Lorentz covariant quark model

2006 ◽  
Vol 73 (11) ◽  
Author(s):  
Amand Faessler ◽  
Th. Gutsche ◽  
V. E. Lyubovitskij ◽  
K. Pumsa-ard
Keyword(s):  
Quark Model ◽  
Covariant Quark Model

scholarly journals The meson spectrum in a covariant quark model

2000 ◽  
Vol 9 (2) ◽  
pp. 221-244 ◽  
Author(s):  
R. Ricken ◽  
M. Koll ◽  
D. Merten ◽  
B.Ch. Metsch ◽  
H.R. Petry
Keyword(s):  
Quark Model ◽  
Meson Spectrum ◽  
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]).

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