A Comparative Study of Pentaquark Interpolating Currents
High Energy Physics - Phenomenology
2009-11-10 v2 Nuclear Theory
Abstract
In a diquark-diquark-antiquark picture of pentaquarks, we use two interpolating currents to calculate the mass of the recently measured state in the framework of QCD sum rules. We show that, even though yielding similar values for (and close to the experimental value), these currents differ from each other in what concerns the strength of the pole, convergence of the OPE and sensitivity to the continuum threshold parameter.
Keywords
Cite
@article{arxiv.hep-ph/0406246,
title = {A Comparative Study of Pentaquark Interpolating Currents},
author = {R. D. Matheus and F. S. Navarra and M. Nielsen and R. Rodrigues da Silva},
journal= {arXiv preprint arXiv:hep-ph/0406246},
year = {2009}
}
Comments
19 pages, 8 figures, replaced version accepted for publication in Phys. Lett. B