TY - JOUR
T1 - 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
AU - Aaboud, M
AU - Aad, G
AU - Abbott, B.
AU - Abdallah, J
AU - Abdinov, O
AU - Abeloos, B
AU - Åkesson, Torsten
AU - Bocchetta, Simona
AU - BRYNGEMARK, LENE
AU - Doglioni, Caterina
AU - Floderus, Anders
AU - Hedberg, Vincent
AU - Jarlskog, Göran
AU - Lytken, Else
AU - Mjörnmark, Ulf
AU - Smirnova, Oxana
AU - Viazlo, Oleksandr
AU - ATLAS Collaboration
N1 - Cited By :1
Export Date: 7 July 2017
PY - 2016
Y1 - 2016
N2 - 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 (pT) thresholds, and the normalised differential cross-sections as a function of pT for the five highest-pT 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 pT of a single jet or the scalar sum of pT 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.[Figure not available: see fulltext.] © 2016, The Author(s).
AB - 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 (pT) thresholds, and the normalised differential cross-sections as a function of pT for the five highest-pT 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 pT of a single jet or the scalar sum of pT 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.[Figure not available: see fulltext.] © 2016, The Author(s).
KW - Hadron-Hadron scattering (experiments)
U2 - 10.1007/JHEP09(2016)074
DO - 10.1007/JHEP09(2016)074
M3 - Article
SN - 1029-8479
VL - 2016
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 9
M1 - 74
ER -