Measurement of jet activity produced in top-quark events with an electron, a muon and two b -tagged jets in the final state in pp collisions at √ s =13 TeV with the ATLAS detector [Elektronisk resurs]
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Aaboud, M. (författare)
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- Bergeås Kuutmann, Elin 1980- (författare)
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Alternativt namn: Kuutmann, Elin Bergeås, 1980-
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Brenner, Richard (författare)
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Ekelöf, Tord (författare)
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Ellert, Mattias (författare)
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Ferrari, Arnaud 1973- (författare)
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Gardin, P. O. Joakim (författare)
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Madsen, Alexander (författare)
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Öhman, Henrik (författare)
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Rangel-Smith, Camila (författare)
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Zwalinski, L. (författare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
- 2017
- Engelska.
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Ingår i: European Physical Journal C. - 1434-6044. ; 77:4
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Sammanfattning
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- Measurements of jet activity in top-quark pair events produced in proton-proton collisions are presented, using 3.2 fb of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge pair and two b-tagged jets in the final state. The normalised differential cross-sections of top-quark pair production are presented as functions of additional-jet multiplicity and transverse momentum, . The fraction of signal events that do not contain additional jet activity in a given rapidity region, the gap fraction, is measured as a function of the threshold for additional jets, and is also presented for different invariant mass regions of the system. All measurements are corrected for detector effects and presented as particle-level distributions compared to predictions with different theoretical approaches for QCD radiation. While the kinematics of the jets from top-quark decays are described well, the generators show differing levels of agreement with the measurements of observables that depend on the production of additional jets.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Subatomic Physics (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
- Subatomär fysik (hsv)
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