Measurement of top quark polarization in t t - lepton + jets final states MEASUREMENT of TOP QUARK POLARIZATION in ... V. M. ABAZOV et al.

(D0 Collaboration)

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present a measurement of top quark polarization in tt- pair production in pp- collisions at s=1.96 TeV using data corresponding to 9.7 fb-1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the tt- production plane. This is the first measurement of top quark polarization at the Tevatron using lepton+jet final states and the first measurement of the transverse polarization in tt- production. The observed distributions are consistent with standard model predictions of nearly no polarization.

Original languageEnglish
Article number011101
JournalPhysical Review D
Volume95
Issue number1
DOIs
Publication statusPublished - 2017 Jan 9

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leptons
quarks
polarization
pair production
luminosity
collisions
detectors
predictions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Measurement of top quark polarization in t t - lepton + jets final states MEASUREMENT of TOP QUARK POLARIZATION in ... V. M. ABAZOV et al. / (D0 Collaboration).

In: Physical Review D, Vol. 95, No. 1, 011101, 09.01.2017.

Research output: Contribution to journalArticle

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abstract = "We present a measurement of top quark polarization in tt- pair production in pp- collisions at s=1.96 TeV using data corresponding to 9.7 fb-1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the tt- production plane. This is the first measurement of top quark polarization at the Tevatron using lepton+jet final states and the first measurement of the transverse polarization in tt- production. The observed distributions are consistent with standard model predictions of nearly no polarization.",
author = "{(D0 Collaboration)} and Abazov, {V. M.} and B. Abbott and Acharya, {B. S.} and M. Adams and T. Adams and Agnew, {J. P.} and Alexeev, {G. D.} and G. Alkhazov and A. Alton and A. Askew and S. Atkins and K. Augsten and V. Aushev and Y. Aushev and C. Avila and F. Badaud and L. Bagby and B. Baldin and Bandurin, {D. V.} and S. Banerjee and E. Barberis and P. Baringer and Bartlett, {J. F.} and U. Bassler and V. Bazterra and A. Bean and M. Begalli and L. Bellantoni and Beri, {S. B.} and G. Bernardi and R. Bernhard and I. Bertram and M. Besan{\cc}on and R. Beuselinck and Bhat, {P. C.} and S. Bhatia and V. Bhatnagar and G. Blazey and S. Blessing and K. Bloom and A. Boehnlein and D. Boline and Boos, {E. E.} and G. Borissov and M. Borysova and A. Brandt and O. Brandt and M. Brochmann and Suyong Choi and Park, {Sung Keun}",
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AB - We present a measurement of top quark polarization in tt- pair production in pp- collisions at s=1.96 TeV using data corresponding to 9.7 fb-1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the tt- production plane. This is the first measurement of top quark polarization at the Tevatron using lepton+jet final states and the first measurement of the transverse polarization in tt- production. The observed distributions are consistent with standard model predictions of nearly no polarization.

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