First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass
Name
PhysRevD.92.032006.pdf
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513.04 KB
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Author(s)
Aaltonen, T.
Amerio, S.
Amidei, D.
Anastassov, A.
Annovi, A.
Antos, J.
Apollinari, G.
Appel, J. A.
Arisawa, T.
Artikov, A.
Date Issued
August 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T., et al. "First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass." Phys. Rev. D 92, 032006 (August 2015).
Version
Final published version
Abstract
We measure the particle-level forward-backward production asymmetry in b[bar over b] pairs with masses (m[subscript b[bar over b]]) larger than 150 GeV/c[superscript 2], using events with hadronic jets and employing jet charge to distinguish b from [bar over b]. The measurement uses 9.5 fb[superscript -1] of p[bar over p] collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of m[subscript b[bar over 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/c[superscript 2], whereas a model containing a heavier 345 GeV/c[superscript 2] axigluon is not excluded.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.92.032006
