Bottom-Quark Forward-Backward Asymmetry in the Standard Model and Beyond - INSPIRE

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Bottom-Quark Forward-Backward Asymmetry in the Standard Model and Beyond

Feb 27, 2013

5 pages

Published in:

Phys.Rev.Lett. 111 (2013) 062003,
Phys.Rev.Lett. 112 (2014) 23, 239901 (erratum)

Published: Aug 6, 2013

e-Print:

1302.6995 [hep-ph]

DOI:

Report number:

UCSD-PTH-13-01

View in:

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Abstract: (APS)

We computed the bottom-quark forward-backward asymmetry at the Tevatron in the standard model (SM) 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, MNP≲150 GeV, can cause significant deviations from the SM prediction for the bottom asymmetry. The bottom asymmetry can be used to distinguish between competing new physics (NP) explanations of the top asymmetry based on how the NP interferes with s-channel gluon and Z exchange.

Note:

v3: Bug found in FeynRules 1.6.1 (not present in current version, 2.0.24) One plot corrected. Conclusions unaffected

14.65.Fy
bottom
angular distribution: asymmetry
quantum chromodynamics
higher-order: 1
electroweak interaction
Batavia TEVATRON Coll
standard model
new physics
exchange

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Figures(7)

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