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Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions

Abstract: We report a measurement of the forward-backward asymmetry, AFB, in b¯b pairs produced in proton-antiproton collisions and identified by muons from semileptonic b-hadron decays. The event sample is collected at a center-of-mass energy of vs=1.96??TeV with the CDF II detector and corresponds to 6.9??fb-1 of integrated luminosity. We obtain an integrated asymmetry of AFB(b¯b)=(1.2±0.7)% at the particle level for b-quark pairs with invariant mass, mb¯b, down to 40??GeV/c2 and measure the dependence of AFB(b¯b) on mb¯b. The results are compatible with expectations from the standard model.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Phys. Rev. D, Vol. 93, Num. 11, Pag. 112003 (2016)

Editorial: American Physical Society

 Fecha de publicación: 01/11/2016

Nº de páginas: 12

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.93.112003

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

Url de la publicación: https://doi.org/10.1103/PhysRevD.93.112003

Autoría

AALTONEN, TIMO ANTERO

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON