About: Measurement of leptonic asymmetries and top quark polarization in ttˉ production

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present measurements of lepton (l) angular distributions in ttbar -> W+ b W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to an integrated luminosity of 5.4fb^-1, collected with the D0 detector at the Fermilab Collider, we find that the angular distributions of l- relative to anti-protons and l+ relative to protons are in agreement with each other. Combining the two distributions and correcting for detector acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat) +- 1.3(syst))%, compared to the standard model prediction of A^l_FB (predicted) = (4.7 +- 0.1)%. This result is further combined with the measurement based on the analysis of the l+jets final state to obtain A^l_FB = (11.8 +- 3.2)%. Furthermore, we present a first study of the top-quark polarization. We present measurements of lepton (l) angular distributions in ttbar -> W+ b W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to an integrated luminosity of 5.4fb^-1, collected with the D0 detector at the Fermilab Collider, we find that the angular distributions of l- relative to anti-protons and l+ relative to protons are in agreement with each other. Combining the two distributions and correcting for detector acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat) +- 1.3(syst))%, compared to the standard model prediction of A^l_FB (predicted) = (4.7 +- 0.1)%. This result is further combined with the measurement based on the analysis of the l+jets final state to obtain A^l_FB = (11.8 +- 3.2)%. Furthermore, we present a first study of the top-quark polarization. (en)
Title	Measurement of leptonic asymmetries and top quark polarization in ttˉ production Measurement of leptonic asymmetries and top quark polarization in ttˉ production (en)
skos:prefLabel	Measurement of leptonic asymmetries and top quark polarization in ttˉ production Measurement of leptonic asymmetries and top quark polarization in ttˉ production (en)
skos:notation	RIV/68378271:_____/13:00398305!RIV14-MSM-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(LG12006)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Kupčo, Alexander Lokajíček, Miloš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	86730
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00398305
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	D0; Fermilab; polarization; top; pair production; angular distribution; asymmetry; anti-p p; interaction; dilepton; final state; ((n)jet lepton (en)
http://linked.open.../riv/klicoveSlovo	((n)jet lepton D0 final state asymmetry angular distribution pair production interaction anti-p p polarization Fermilab dilepton top
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[38BA7F090FA4]
http://linked.open...i/riv/nazevZdroje	Physical Review D: Particles, Fields, Gravitation and Cosmology
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	392 (xsd:int)
http://linked.open...vavai/riv/projekt	Collaboration on NOvA and D0 Experiments at Fermi National Laboratory, USA
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	87
http://linked.open...iv/tvurceVysledku	Abazov, V. M. Abbott, B. Acharya, B. S. Kupčo, Alexander Lokajíček, Miloš
http://linked.open...ain/vavai/riv/wos	000313946200001
issn	1550-7998
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevD.87.011103

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