Valence quark contributions for the gamma N -> P11(1440) transition
High Energy Physics - Phenomenology
2015-05-20 v1 High Energy Physics - Experiment
High Energy Physics - Lattice
Nuclear Experiment
Nuclear Theory
Abstract
A covariant spectator quark model is applied to estimate the valence quark contributions to the$ F1*(Q2) and F2*(Q2) transition form factors for the gamma N -> P11(1440) reaction. The Roper resonance, P11(1440), is assumed to be the first radial excitation of the nucleon. The model requires no extra parameters except for those already fixed by the previous studies for the nucleon. The results are consistent with the experimental data in the high Q2 region, and those from the lattice QCD. Finally the model is also applied to estimate the meson cloud contributions from the CLAS and MAID analysis.
Keywords
Cite
@article{arxiv.1010.2765,
title = {Valence quark contributions for the gamma N -> P11(1440) transition},
author = {G. Ramalho and K. Tsushima},
journal= {arXiv preprint arXiv:1010.2765},
year = {2015}
}
Comments
4 pages, 2 figures, talk given at MENU 2010, Williambsurg, VA