Tuesday, April 16, 2013

1304.3636 (Felipe J. Llanes-Estrada et al.)

Triply heavy baryon mass estimated within pNRQCD    [PDF]

Felipe J. Llanes-Estrada, Olga I. Pavlova, Richard Williams
Potential-NRQCD offers an effective-theory based approach to heavy-quark physics. While meson Q-anti_Q computations are tractable in pure alpha_s-perturbation theory, more complex many-body quark systems transcend it. A possibility inherited from nuclear physics is to employ the perturbative static potentials in a numerical diagonalization, eventually obtaining the exact lowest eigenvalue in each channel for a given-order perturbative potential. The power counting is manifest in the potential instead of the spectrum. The NNLO-potential for the 3-body problem is already available, so we have addressed triply-heavy baryons in this initial work with a computer-aided 2-parameter variational treatment.
View original: http://arxiv.org/abs/1304.3636

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