Zobrazeno 1 - 10
of 157
pro vyhledávání: '"Vicente Vacas M. J."'
The nucleon mass and pion-nucleon sigma term from a chiral analysis of Nf = 2 lattice QCD world data
Publikováno v:
EPJ Web of Conferences, Vol 66, p 06001 (2014)
We investigate the pion-mass dependence of the nucleon mass within the covariant SU(2) baryon chiral perturbation theory up to order p4 with and without explicit Δ (1232) degrees of freedom. We fit lattice QCD data from several collaborations for 2
Externí odkaz:
https://doaj.org/article/152348a526e243e6864956fab207c4ef
We use our model for neutrino pion production on the nucleon to study pion production on a nucleus. The model is conveniently modified to include in-medium corrections and its validity is extended up to 2 GeV neutrino energies by the inclusion of new
Externí odkaz:
http://arxiv.org/abs/1304.2614
The pion-mass dependence of the nucleon mass within the covariant SU(2) baryon chiral perturbation theory both without and with explicit Delta(1232) degrees of freedom up to order p^4 is investigated. By fitting to lattice QCD data in 2 and 2+1 flavo
Externí odkaz:
http://arxiv.org/abs/1304.0483
We report on some recent developments in our understanding of the light-quark mass dependence and the SU(3) flavor symmetry breaking corrections to the magnetic moments of the ground-state baryons in a covariant formulation of baryon chiral perturbat
Externí odkaz:
http://arxiv.org/abs/1209.0538
We analyze the MiniBooNE CCQE $d\sigma/dT_\mu d\cos\theta_\mu$ data using a theoretical model that has proved to be quite successful in the analysis of nuclear reactions with electron, photon and pion probes. We find that RPA and multinucleon knockou
Externí odkaz:
http://arxiv.org/abs/1110.1200
We re-evaluate our model predictions in Phys. Rev. D 79, 013002 (2009) for different observables in neutrino induced coherent pion production. This comes as a result of the new improved fit to old bubble chamber data of the dominant axial C_5^A nucle
Externí odkaz:
http://arxiv.org/abs/1012.4260
Publikováno v:
Phys.Rev.D81:085046,2010
The N-Delta axial form factors are determined from neutrino induced pion production ANL & BNL data by using a state of the art theoretical model, which accounts both for background mechanisms and deuteron effects. We find violations of the off diagon
Externí odkaz:
http://arxiv.org/abs/1001.4416
We review some recent progress in our understanding of the lowest-lying spin-1/2 and spin-3/2 baryon magnetic moments (MMs) in terms of Chiral Perturbation Theory (ChPT). In particular, we show that at next-to-leading-order ChPT can describe the MMs
Externí odkaz:
http://arxiv.org/abs/1001.0465
Publikováno v:
AIP Conf.Proc.1222:227-232,2010
We discuss different parameterizations of the $C_5^A(q^2)$ $N\Delta$ axial form factor, fitted to the old Argonne bubble chamber data for pion production by neutrinos, and we use coherent pion production to test their low $q^2$ behavior. We find mode
Externí odkaz:
http://arxiv.org/abs/0912.2631
Publikováno v:
AIP Conf.Proc.1222:202-206,2010
We make a review of the main nuclear effects that affect neutrino-nucleus cross sections. We discuss how the different models in the literature try to describe these different effects, and thus try to compare between them. We focus on the quasi-elast
Externí odkaz:
http://arxiv.org/abs/0910.3041