Current algebra and soft pionic modes in asymmetric quark matter
Nuclear Theory
2009-10-30 v2 High Energy Physics - Phenomenology
Abstract
Pionic excitations are analyzed in isospin-asymmetric Fermi gas of constituent quarks. It is found that in addition to the usual pionic excitations, there exists a very low collective mode with quantum numbers of the charged pion (spin-isospin sound). In the chiral limit the excitation energy of one of the modes scales as the current quark mass, and the mode saturates current-algebraic sum rules. This is in agreement with predictions of current algebra for isospin-asymmetric medium.
Keywords
Cite
@article{arxiv.nucl-th/9609053,
title = {Current algebra and soft pionic modes in asymmetric quark matter},
author = {Wojciech Broniowski and Brigitte Hiller},
journal= {arXiv preprint arXiv:nucl-th/9609053},
year = {2009}
}
Comments
version accepted in Phys. Lett. B, 12 pages