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Measurement of the ...
Measurement of the top quark mass in the lepton plus jets channel using the ideogram method
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Abazov, V. M. (författare)
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- Åsman, Barbro (författare)
- Uppsala universitet,Stockholms universitet,Fysikum
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- Bélanger-Champagne, Camille (författare)
- Uppsala universitet,Högenergifysik
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- Clément, Christophe (författare)
- Uppsala universitet,Stockholms universitet,Fysikum
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- Gollub, Nils (författare)
- Uppsala universitet
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- Hansson, Per (författare)
- Uppsala universitet,KTH,Partikel- och astropartikelfysik
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Strandberg, Jonas (författare)
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- Strandberg, Sara (författare)
- Uppsala universitet
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Zverev, E. G. (författare)
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- Strandberg, Strandberg (författare)
- Stockholms universitet,Fysikum
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Physical Review D. - 1550-7998 .- 1550-2368. ; 75:9, s. 092001-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- A measurement of the top quark mass using events with one charged lepton, missing transverse energy, and jets in the final state, collected by the D0 detector from p (p) over bar collisions at root s=1.96 TeV at the Fermilab Tevatron collider, is presented. A constrained fit is used to fully reconstruct the kinematics of the events. For every event a top quark mass likelihood is calculated taking into account all possible jet assignments and the probability that an event is signal or background. Lifetime-based identification of b jets is employed to enhance the separation between t (t) over bar signal and background from other physics processes and to improve the assignment of the observed jets to the quarks in the t (1) over bar hypothesis. We extract a multiplicative jet energy scale (JES) factor in situ, greatly reducing the systematic effect related to the jet energy measurement. In a data sample with an integrated luminosity of 425 pb(-1), we observe 230 candidate events, with an estimated background of 123 events, and measure m(t)=173.7 +/- 4.4(stat+JES)(-2.0)(+2.1)(syst) GeV. This result represents the first application of the ideogram technique to the measurement of the top quark mass in lepton+jets events.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- PRODUCTION CROSS-SECTION
- P(P)OVER-BAR COLLISIONS
- FRAGMENTATION FUNCTION
- PARTON DISTRIBUTIONS
- W-BOSON
- DETECTOR
- PHYSICS
- EVENTS
- DECAYS
- Elementary particle physics
- Elementarpartikelfysik
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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