Speaker
Christopher W. Murphy
(University of California, San Diego)
Description
We computed the bottom quark forward-backward asymmetry at the Tevatron in the Standard Model and for several new physics scenarios. Near the $Z$-pole, the SM bottom asymmetry is dominated by tree level exchanges of electroweak gauge bosons. While above the Z-pole, next-to-leading order QCD dominates the SM asymmetry as was the case with the top quark forward-backward asymmetry. Light new physics, $M_{NP} \lsim 150$~GeV, can cause significant deviations from the SM prediction for the bottom asymmetry. The bottoms asymmetry can be used to distinguish between competing NP explanations of the top asymmetry based on how the NP interferes with $s$-channel gluon and $Z$ exchange.
Author
Christopher W. Murphy
(University of California, San Diego)
Co-author
Prof.
Benjamin Grinstein
(University of California San Diego)
