We measure the particle-level forward-backward production asymmetry in b (b) over bar pairs with masses (m(b (b) over bar)) larger than 150 GeV/c(2), using events with hadronic jets and employing jet charge to distinguish b from (b) over bar. The measurement uses 9.5 fb(-1) of p (p) over bar collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of m(b (b) over bar) is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of 200 GeV/c(2), whereas a model containing a heavier 345 GeV/c(2) axigluon is not excluded.
|Titolo:||First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass|
|Citazione:||Aaltonen, T., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., et al. (2015). First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 92(3).|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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