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

0501355 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Aaltonen, T. - Amerio, S. - Amidei, D. - Lysák, Roman … celkem 396 autorů
Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions.
Physical Review D. Roč. 93, č. 11 (2016), s. 1-12, č. článku 112003. ISSN 2470-0010. E-ISSN 2470-0029
Institucionální podpora: RVO:68378271
Klíčová slova: Batavia TEVATRON Coll * 1960 GeV-cms * CDF * experimental results * mass dependence
Obor OECD: Particles and field physics
Impakt faktor: 4.557, rok: 2016

We report a measurement of the forward-backward asymmetry, AFB, in bb¯ 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 s=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(bb¯)=(1.2±0.7)% at the particle level for b-quark pairs with invariant mass, mbb¯, down to 40  GeV/c2 and measure the dependence of AFB(bb¯) on mbb¯. The results are compatible with expectations from the standard model.
Trvalý link: http://hdl.handle.net/11104/0293343