Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Goity, Jose L."'
Autor:
Goity, Jose L., Weiss, Christian
The target normal single-spin asymmetry in electron nucleon scattering is studied in the framework of the 1/Nc expansion of QCD, which allows for a rigorous description in the energy range that includes the Delta resonance and below the second baryon
Externí odkaz:
http://arxiv.org/abs/2404.03674
$N \rightarrow \Delta$ transitions offer new possibilities for exploring the isovector component of the QCD quark angular momentum (AM) operator causing the $J^{u - d}$ flavor asymmetry in the nucleon. We extend the concept of QCD AM to transitions b
Externí odkaz:
http://arxiv.org/abs/2304.08575
The target normal single-spin asymmetry in inclusive electron-nucleon scattering is studied in the low-energy regime that includes the $\Delta$ resonance. The particular interest in the asymmetry resides in that it is driven by two-photon exchange ef
Externí odkaz:
http://arxiv.org/abs/2303.12681
Autor:
Fernando, Ishara P., Goity, Jose L.
Publikováno v:
Phys. Rev. D 101, 054026 (2020)
Baryon Chiral Perturbation Theory (BChPT) combined with the 1/Nc expansion is applied to the SU(3) vector currents. In terms of the xi power counting linking the low energy and 1/Nc expansions according to O(xi) = O(p) = O(1/Nc), the study is carried
Externí odkaz:
http://arxiv.org/abs/1911.00987
Autor:
Fernando, Ishara P., Goity, Jose L.
The chiral and $1/N_c$ expansions are combined in the description of low energy baryons. The combination furnishes a better behaved expansion, consequence of exactly eliminating large terms that violate the $1/N_c$ expansion and which are typical of
Externí odkaz:
http://arxiv.org/abs/1904.07125
Autor:
Fernando, Ishara P., Goity, Jose L.
ChPT and the $1/N_c$ expansion provide systematic frameworks for the strong interactions at low energy. A combined framework of both expansions has been developed and applied for baryons with three light-quark-flavors. The small scale expansion of th
Externí odkaz:
http://arxiv.org/abs/1904.07112
Autor:
Fernando, Ishara P., Goity, Jose L.
Publikováno v:
Phys. Rev. D 97, 054010 (2018)
Baryon Chiral Perturbation Theory combined with the $1/N_c$ expansion is implemented for three flavors. Baryon masses, vector charges and axial vector couplings are studied to one-loop and organized according to the $\xi$-expansion, in which the $1/N
Externí odkaz:
http://arxiv.org/abs/1712.01672
Autor:
Fernando, Ishara P., Goity, Jose L.
The excited baryon masses are analyzed in the framework of the $1/N_c$ expansion using the available physical masses and also the masses obtained in lattice QCD for different quark masses. The baryon states are organized into irreducible representati
Externí odkaz:
http://arxiv.org/abs/1410.1384
Autor:
Flores-Mendieta, Ruben, Goity, Jose L.
The baryon vector current is computed at one-loop order in large-Nc baryon chiral perturbation theory, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis and the
Externí odkaz:
http://arxiv.org/abs/1407.0926
Autor:
Goity, Jose L., Trinchero, Roberto C.
Five dimensional dilaton models are considered as possible holographic duals of the pure gauge QCD vacuum. In the framework of these models, the QCD trace anomaly equation is considered. Each quantity appearing in that equation is computed by hologra
Externí odkaz:
http://arxiv.org/abs/1204.6327