Zhomart Tyulemissov
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View article: Revisiting radiative transitions of charmonium states in a covariant confined quark model
Revisiting radiative transitions of charmonium states in a covariant confined quark model Open
We calculate the amplitudes and branching fractions of χ c J ( 1 P ) , h c ( 1 P ) , J / ψ ( 1 S ) , and ψ ( 2 S ) radiative decays in the framework of the covariant confined quark model. First, we explicitly show that all ca…
View article: The covariant confined quark model as a unified tool for heavy hadron decays
The covariant confined quark model as a unified tool for heavy hadron decays Open
We present a comprehensive study of the Covariant Confined Quark Model (CCQM), a versatile framework for describing electromagnetic, semileptonic, and nonleptonic decays of heavy mesons and quarkonia. The CCQM is built on a covariant nonlo…
View article: Analyzing leptonic decays of heavy quarkonia in the covariant confined quark model
Analyzing leptonic decays of heavy quarkonia in the covariant confined quark model Open
The leptonic decay widths of heavy quarkonia are complementary observables to the semileptonic decays of heavy mesons and provide additional insight into the possible lepton flavor universality breaking. We analyze the former in the framew…
View article: Analyzing leptonic decays of heavy quarkonia in covariant confined quark model
Analyzing leptonic decays of heavy quarkonia in covariant confined quark model Open
The leptonic decay widths of heavy quarkonia are complementary observables to the semileptonic decays of heavy mesons and provide additional insight into the possible lepton flavor universality breaking. We analyze the former in the framew…
View article: Nonleptonic decay of Ω-hyperon in the framework of covariant confined quark model
Nonleptonic decay of Ω-hyperon in the framework of covariant confined quark model Open
Ω--hyperon is a hadron with mass МΩ =1.67245 GeV, spin JP =3/2+ and consisting of three s-quarks. The main decay channels of this baryon are the weak modes Ω- - Lambda0K- and Ω- - Xi0pi-. Experimental data from the BesIII collaboration in …
View article: Study of the nonleptonic decay $Ξ^0_c \to Λ^+_c π^-$ in the covariant confined quark model
Study of the nonleptonic decay $Ξ^0_c \to Λ^+_c π^-$ in the covariant confined quark model Open
The nonleptonic decay $Ξ^0_c \to Λ^+_c π^-$ with $ΔC=0$ is systematically studied in the framework of the covariant confined quark model with accounting for both short and long distance effects. The short distance effects are induced by fo…
View article: Chiral Lagrangians for strong decays K1→Kρ(ω)
Chiral Lagrangians for strong decays K1→Kρ(ω) Open
A triangular quark diagram describes the vertex K1Kω with axial-vector, vector, and pseudoscalar mesons is considered in the leading order of 1NC. The application of the obtained vertex to the hadronic decays of the τ-lepton with the produ…
View article: Weak nonleptonic decays of vector B-mesons
Weak nonleptonic decays of vector B-mesons Open
We study the radiative and weak nonleptonic decays of vector B-mesons within the covariant confined quark model (CCQM) developed in our previous papers. First, we calculate the matrix elements and decays widths of the radiative decays $B^\…
View article: Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ ν_\ell$ in view of LHCb observation
Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ ν_\ell$ in view of LHCb observation Open
In light of the LHCb observations about the $B_s \to D_s^{(*)}\ell ν_\ell$ semileptonic decays, we study these channels within the Standard Model framework of covariant confined quark model. The necessary transition form factors are comput…
View article: Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ \nu_\ell$ in view of LHCb observation
Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ \nu_\ell$ in view of LHCb observation Open
Here, we study the $B_s \to D_s^{(*)}\ell \nu_\ell$ semileptonic decays within the Standard Model framework of covariant confined quark model. The necessary transition form factors are computed in the entire dynamical range of momentum tra…
View article: Calculation of doubly heavy baryons decay
Calculation of doubly heavy baryons decay Open
We calculated a subclass of four nonleptonic two-body weak decays of the double charm baryon ground states Ξcc++. Nonleptonic decays can be dividedinto two group: factorizable and nonfactorizable decays. The first one can be easily calcula…
View article: <i>Ab initio</i> three-loop calculation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>-exchange contribution to nonleptonic decays of double charm baryons
<i>Ab initio</i> three-loop calculation of the -exchange contribution to nonleptonic decays of double charm baryons Open
We have made an ab initio three-loop quark model calculation of the $W$-exchange contribution to the nonleptonic two-body decays of the doubly charmed baryons $\Xi_{cc}^{++}$ and $\Omega_{cc}^{+}$. The $W$-exchange contributions appear in …
View article: The three quark-current of delta-isobar
The three quark-current of delta-isobar Open
Strong decay D®Np is one of the best modes to search for particles with spin 3/2. D - isobar decay consist of 99% - hadronic decay and 1% - electromagnetic decay, i.e. in this process strong decay is dominating channel which makes it impor…
View article: Strong form factor of delta (1232)
Strong form factor of delta (1232) Open
Our article is devoted to study of the D®Np decay. Strong decay D®Np is one of the best modes to search for particles with spin 3/2. Strong decay is dominating channel of decay, i.e. D - isobar decay consist of 99% - hadronic decay, 1% - e…
View article: Polarization observables in rare decay B->K*(->K Pi )l+l-
Polarization observables in rare decay B->K*(->K Pi )l+l- Open
Our article is devoted to the study of the B->K*(->K Pi )l+l- decay. Rare decay B->K*(->K Pi )l+l- is one of the best modes to search for new physics beyond the Standard Model (SM). A large number of observables allow for unique tests of t…