Light Gluino and the Running of alpha_s
High Energy Physics - Phenomenology
2014-11-17 v4
Abstract
A gluino in the mass range 12--16 GeV combined with a light (2--5.5 GeV) bottom squark, as has been proposed recently to explain an excess of b quark hadroproduction, would affect the momentum-scale dependence (``running'') of the strong coupling constant alpha_s in such a way as to raise its value at M_Z by about 0.014 +/- 0.001. If one combines sources of uncertainty at low (m_b) and high (M_Z) mass scales, one can only distinguish such an effect at slightly more than the 2 sigma level. Prospects for improvement in this situation, which include better lattice QCD simulations and better measurements at M_Z, are discussed.
Cite
@article{arxiv.hep-ph/0207235,
title = {Light Gluino and the Running of alpha_s},
author = {Cheng-Wei Chiang and Zumin Luo and Jonathan L. Rosner},
journal= {arXiv preprint arXiv:hep-ph/0207235},
year = {2014}
}
Comments
16 pages, 2 figures; text modified and references added for journal publication