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Measurements of b-j...
Measurements of b-jet tagging efficiency with the ATLAS detector using tt¯" role="presentation">tt¯ events at s=13" role="presentation">s√=13 TeV
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Aaboud, M. (author)
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- Asimakopoulou, Eleni M. (author)
- Uppsala universitet,Högenergifysik
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- Bergeås Kuutmann, Elin, 1980- (author)
- Uppsala universitet,Högenergifysik
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- Bokan, Petar (author)
- Uppsala universitet,Högenergifysik
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- Brenner, Richard (author)
- Uppsala universitet,Högenergifysik
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- Ekelöf, Tord (author)
- Uppsala universitet,Högenergifysik
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- Ellert, Mattias (author)
- Uppsala universitet,Högenergifysik
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- Ferrari, Arnaud, 1973- (author)
- Uppsala universitet,Högenergifysik
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- Gradin, P. O. Joakim (author)
- Uppsala universitet,Högenergifysik
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- Isacson, Max (author)
- Uppsala universitet,Högenergifysik
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- Mårtensson, Mikael (author)
- Uppsala universitet,Högenergifysik
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- Sales De Bruin, Pedro (author)
- Uppsala universitet,Högenergifysik
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Zwalinski, L. (author)
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(creator_code:org_t)
- SPRINGER, 2018
- 2018
- English.
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In: Journal of High Energy Physics (JHEP). - : SPRINGER. - 1126-6708 .- 1029-8479. ; :8
- Related links:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The efficiency to identify jets containing b-hadrons (b-jets) is measured using a high purity sample of dileptonic top quark-antiquark pairs (t (t) over bar) selected from the 36.1 fb(-1) of data collected by the ATLAS detector in 2015 and 2016 from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy root s = 13 TeV. Two methods are used to extract the efficiency from t (t) over bar events, a combinatorial likelihood approach and a tag-and-probe method. A boosted decision tree, not using b-tagging information, is used to select events in which two b-jets are present, which reduces the dominant uncertainty in the modelling of the flavour of the jets. The efficiency is extracted for jets in a transverse momentum range from 20 to 300 GeV, with data-to-simulation scale factors calculated by comparing the efficiency measured using collision data to that predicted by the simulation. The two methods give compatible results, and achieve a similar level of precision, measuring data-to-simulation scale factors close to unity with uncertainties ranging from 2% to 12% depending on the jet transverse momentum.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- Hadron-Hadron scattering (experiments)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Aaboud, M.
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Asimakopoulou, E ...
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Bergeås Kuutmann ...
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Bokan, Petar
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Brenner, Richard
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Ekelöf, Tord
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show more...
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Ellert, Mattias
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Ferrari, Arnaud, ...
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Gradin, P. O. Jo ...
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Isacson, Max
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Mårtensson, Mika ...
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Sales De Bruin, ...
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Zwalinski, L.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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Journal of High ...
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Uppsala University