We measure the particle-level forward-backward production asymmetry in bb¯ pairs with masses (mbb¯) larger than 150 GeV/c2, using events with hadronic jets and employing jet charge to distinguish b from b¯. The measurement uses 9.5 fb-1 of pp¯ collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of mbb¯ 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/c2, whereas a model containing a heavier 345 GeV/c2 axigluon is not excluded.
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevD.92.032006|
|Codice identificativo ISI:||WOS:000359865700002|
|Codice identificativo Scopus:||2-s2.0-84940470169|
|Titolo:||First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass|
|Appare nelle tipologie:||1.1 Articolo in rivista|