Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Serna, Fernando E."'
The leading Fock state light-front wave functions of heavy quarkonia and $D$ and $B$ mesons are obtained from the projections of their Bethe-Salpeter wave functions on the light front. We compute therefrom their leading-twist time-reversal even trans
Externí odkaz:
http://arxiv.org/abs/2409.01441
We calculate the strong decay couplings for $\rho \to \pi\pi$, $\phi\to KK$, $K^* \to K\pi$ and $D^*\to D\pi$ in a unified and consistent approach based on the impulse approximation, nonperturbative solutions of the quark-gap equation and the Poincar
Externí odkaz:
http://arxiv.org/abs/2211.16618
Publikováno v:
Phys. Rev. D 106, L091504 (2022)
We report on the first calculation of the longitudinal and transverse light front distribution amplitudes of the $D^*$ and $D^*_s$ mesons and their first four moments. As a byproduct, we also obtain these distribution amplitudes for the $\rho$, $\phi
Externí odkaz:
http://arxiv.org/abs/2209.09278
Autor:
Cheng, Peng, Serna, Fernando E., Yao, Zhao-Qian, Chen, Chen, Cui, Zhu-Fang, Roberts, Craig D.
Octet baryon axial, induced pseudoscalar, and pseudoscalar form factors are computed using a symmetry-preserving treatment of a vector$\,\times\,$vector contact interaction (SCI), thereby unifying them with an array of other baryon properties and ana
Externí odkaz:
http://arxiv.org/abs/2207.13811
We study the gauge dependence of the quark propagator in quantum chromodynamics by solving the gap equation with a nonperturbative quark-gluon vertex which is constrained by longitudinal and transverse Slavnov-Taylor identities, the discrete charge c
Externí odkaz:
http://arxiv.org/abs/2202.12313
Autor:
El-Bennich, Bruno, Serna, Fernando E., da Silveira, Roberto Correa, Albino, Luis, Bashir, Adnan, Rojas, Eduardo
We present preliminary results on the longitudinal $and$ transverse form factors of the quark-gluon vertex as functions of the incoming and outgoing quark momenta and an angle $\theta =2\pi/3$ between them. The expressions for these form factors were
Externí odkaz:
http://arxiv.org/abs/2201.04144
Autor:
El-Bennich, Bruno, Serna, Fernando E.
We review heavy quark flavor and spin symmetries, their exploitation in heavy meson effective theories and the flavored couplings of charmed and light mesons in the definition of their effective Lagrangians. We point out how nonperturbative continuum
Externí odkaz:
http://arxiv.org/abs/2109.08076
Autor:
Serna, Fernando E., El-Bennich, Bruno
In this work we use the framework of the Dyson-Schwinger and Bethe-Salpeter equations to compute Light-Cone Distribution Amplitudes of heavy-light mesons and quarkonia. In studying the meson properties, we introduce a flavor dependence in the heavy-q
Externí odkaz:
http://arxiv.org/abs/2109.07505
Autor:
Albino, Luis, Bashir, Adnan, El-Bennich, Bruno, Rojas, Eduardo, Serna, Fernando E., da Silveira, Roberto Correa
Publikováno v:
Journal of High Energy Physics (2021)
We extend earlier studies of transverse Ward-Fradkin-Green-Takahashi identities in QED, their usefulness to constrain the transverse fermion-boson vertex and their importance for multiplicative renormalizability, to the equivalent gauge identities in
Externí odkaz:
http://arxiv.org/abs/2108.06204
Autor:
Serna, Fernando E., da Silveira, Roberto Correa, Cobos-Martínez, J. J., El-Bennich, Bruno, Rojas, Eduardo
Publikováno v:
Eur. Phys. J. C 80, 955 (2020)
The ladder kernel of the Bethe-Salpeter equation is amended by introducing a different flavor dependence of the dressing functions in the heavy-quark sector. Compared with earlier work this allows for the simultaneous calculation of the mass spectrum
Externí odkaz:
http://arxiv.org/abs/2008.09619