Measurement of top quark polarization in $tt$ $lepton+jets$ final states

, D0 Collaboration (2017) Measurement of top quark polarization in $tt$ $lepton+jets$ final states. Physical Review D, 95 (1). ISSN 1550-7998

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Abstract

We present a measurement of top quark polarization in t ¯ t pair production in p ¯ p 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 t ¯ t 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 t ¯ t production. The observed distributions are consistent with standard model predictions of nearly no polarization.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
88438
Deposited By:
Deposited On:
20 Dec 2017 13:52
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Mar 2021 06:00