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First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass

Abstract: We measure the particle-level forward-backward production asymmetry in b¯b pairs with masses (mb¯b) 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 p¯p collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of mb¯b 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.

 Fuente: Phys. Rev. D, Vol. 92, Num. 3, Pag. 032006 (2015)

 Editorial: American Physical Society

 Fecha de publicación: 01/07/2015

 Nº de páginas: 11

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.92.032006

 ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

 Url de la publicación: https://doi.org/10.1103/PhysRevD.92.032006

Autoría

AALTONEN, TIMO ANTERO

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON