Light gluino and the running of alpha(s)
Journal
Physical Review
Journal Volume
D67
Pages
035008
Date Issued
2002-07
Author(s)
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 αs in such a way as to raise its value at MZ by about 0.014±0.001. If one combines sources of uncertainty at low (mb) and high (MZ) mass scales, one cannot exclude such a possibility. Prospects for improvement in this situation, which include better lattice QCD simulations and better measurements at M Z, are discussed. © 2003 The American Physical Society.
Type
journal article