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

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http://hdl.handle.net/10138/184732

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Aaltonen , T , Brucken , E , Devoto , F , Mehtala , P , Orava , R & CDF Collaboration 2016 , ' Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions ' Physical Review D , vol. 93 , no. 11 , 112003 . DOI: 10.1103/PhysRevD.93.112003

Title: Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions
Author: Aaltonen, T.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos, J.; Apollinari, G.; Appel, J. A.; Arisawa, T.; Artikov, A.; Asaadi, J.; Ashmanskas, W.; Auerbach, B.; Aurisano, A.; Azfar, F.; Badgett, W.; Bae, T.; Barbaro-Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Barria, P.; Bartos, P.; Bauce, M.; Bedeschi, F.; Behari, S.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Beretvas, A.; Bhatti, A.; Bland, K. R.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Bortoletto, D.; Boudreau, J.; Boveia, A.; Brigliadori, L.; Bromberg, C.; Brucken, E.; Budagov, J.; Budd, H. S.; Burkett, K.; Busetto, G.; Bussey, P.; Butti, P.; Buzatu, A.; Devoto, F.; Mehtala, P.; Orava, R.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
Date: 2016-06-02
Language: eng
Number of pages: 12
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/184732
Abstract: We report a measurement of the forward-backward asymmetry, A(FB), in b (b) over bar 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 root 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 A(FB)(b (b) over bar) = (1.2 +/- 0.7)% at the particle level for b-quark pairs with invariant mass, m(b (b) over bar), down to 40 GeV/c(2) and measure the dependence of A(FB)(b (b) over bar) on m(b (b) over bar). The results are compatible with expectations from the standard model.
Subject: CHARGE ASYMMETRY
ROOT-S=8 TEV
DETECTOR
114 Physical sciences
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