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Measurement of jet activity in top quark events using the e[my] final state with two b-tagged jets in pp collisions at √s = 8 TeV with the ATLAS detector

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Measurements of the jet activity in tt¯$$ t\overline{t} $$events produced in proton-proton collisions at s=8$$ \sqrt{s}=8 $$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 id...

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Hauptverfasser: Aaboud, Morad (VerfasserIn) , Anders, Christoph (VerfasserIn) , Andrei, George Victor (VerfasserIn) , Antel, Claire (VerfasserIn) , Baas, Alessandra Edda (VerfasserIn) , Brandt, Oleg (VerfasserIn) , Djuvsland, Julia Isabell (VerfasserIn) , Dunford, Monica (VerfasserIn) , Ferreira de Lima, Danilo Enoque (VerfasserIn) , Geisler, Manuel Patrice (VerfasserIn) , Giulini, Maddalena (VerfasserIn) , Hanke, Paul (VerfasserIn) , Jongmanns, Jan (VerfasserIn) , Kluge, Eike-Erik (VerfasserIn) , Kolb, Mathis (VerfasserIn) , Kretz, Moritz (VerfasserIn) , Kugel, Andreas (VerfasserIn) , Lang, Valerie (VerfasserIn) , Lisovyi, Mykhailo (VerfasserIn) , Meier, Karlheinz (VerfasserIn) , Meyer zu Theenhausen, Hanno (VerfasserIn) , Narrias Villar, Daniel Isaac (VerfasserIn) , Radescu, Voica (VerfasserIn) , S̜ahinsoy, Merve (VerfasserIn) , Schätzel, Sebastian (VerfasserIn) , Scharf, Veit (VerfasserIn) , Schöning, André (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Sosa Corral, David E. (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Starovoitov, Pavel (VerfasserIn) , Suchek, Stanislav (VerfasserIn) , Wessels, Martin (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 13 September 2016
In: Journal of high energy physics
Year: 2016, Heft: 9
ISSN:1029-8479
DOI:10.1007/JHEP09(2016)074
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP09(2016)074
Volltext
Verfasserangaben:The ATLAS Collaboration*
Beschreibung
Zusammenfassung:Measurements of the jet activity in tt¯$$ t\overline{t} $$events produced in proton-proton collisions at s=8$$ \sqrt{s}=8 $$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¯$$ e\mu b\overline{b} $$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¯$$ t\overline{t} $$event generators with appropriate parameter choices. The results can be used to further optimise the parameters used in such generators.
Beschreibung:*The ATLAS Collaboration: M. Aaboud, C.F. Anders, V. Andrei, C. Antel, A.E. Baas, O. Brandt, J.I. Djuvsland, M. Dunford, D.E. Ferreira de Lima, M.P. Geisler, M. Giulini, P. Hanke, J. Jongmanns, E.-E. Kluge, M. Kolb, M. Kretz, A. Kugel, V.S. Lang, M. Lisovyi, K. Meier, H. Meyer zu Theenhausen, D.I. Narrias Villar, V. Radescu, M. Sahinsoy, S. Schaetzel, V. Scharf, A. Schoening, H.-C. Schultz-Coulon, D. Sosa, R. Stamen, P. Starovoitov, S. Suchek, M. Wessels [und sehr viele weitere Personen]
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Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP09(2016)074

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