Light Gluino and the Running of alpha_s
arXiv:hep-ph/0207235 · doi:10.1103/PhysRevD.67.035008
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.
16 pages, 2 figures; text modified and references added for journal publication
References in corpus (2)
Cited by in corpus (10)
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