Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114976
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Type: Journal article
Title: Measurement of jet activity in top quark events using the eμ final state with two b-tagged jets in pp collisions at √s=8 TeV with the ATLAS detector
Other Titles: Measurement of jet activity in top quark events using the e mu final state with two b-tagged jets in pp collisions at s root=8 TeV with the ATLAS detector
Author: The, A.
Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
et al.
Citation: Journal of High Energy Physics, 2016; 2016(9):047-1-047-61
Publisher: Springer
Issue Date: 2016
ISSN: 1126-6708
1029-8479
Statement of
Responsibility: 
M. Aaboud, G. Aad ... Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Martin White … et al. (ATLAS Collaboration)
Abstract: Measurements of the jet activity in tt¯ events produced in proton-proton collisions at s√=8 TeV are presented, using 20.3 fb−1 of data collected by the ATLAS experiment at the Large Hadron Collider. The events were selected in the dilepton eμ decay channel with two identified b-jets. The numbers of additional jets for various jet transverse momentum (p T) thresholds, and the normalised differential cross-sections as a function of p T for the five highest-p T additional jets, were measured in the jet pseudo-rapidity range |η| < 4.5. The gap fraction, the fraction of events which do not contain an additional jet in a central rapidity region, was measured for several rapidity intervals as a function of the minimum p T of a single jet or the scalar sum of p T of all additional jets. These fractions were also measured in different intervals of the invariant mass of the eμbb¯¯ system. All measurements were corrected for detector effects, and found to be mostly well-described by predictions from next-to-leading-order and leading-order tt¯ event generators with appropriate parameter choices. The results can be used to further optimise the parameters used in such generators.
Keywords: Hadron-Hadron scattering (experiments)
Rights: © The Author(s) 2016. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.
RMID: 0030056012
DOI: 10.1007/JHEP09(2016)074
Appears in Collections:Physics publications

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