Pentaquarks $uudd\bar q$ with One Color Sextet Diquark
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
The masses of pentaquarks are calculated within the framework of a semirelativistic effective QCD Hamiltonian, using a diquark picture. This approximation allows a correct treatment of the confinement, assumed here to be similar to a Y-junction. With only color antitriplet diquarks, the mass of the pentaquark candidate with positive parity is found around 2.2 GeV. It is shown that, if a color sextet diquark is present, the lowest pentaquark is characterized by a much smaller mass with a negative parity. A mass below 1.7 GeV is computed, if the masses of the color antitriplet and color sextet diquarks are taken similar.
Keywords
Cite
@article{arxiv.hep-ph/0408225,
title = {Pentaquarks $uudd\bar q$ with One Color Sextet Diquark},
author = {C. Semay and F. Brau and B. Silvestre-Brac},
journal= {arXiv preprint arXiv:hep-ph/0408225},
year = {2009}
}