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

UNSPECIFIED (2017) Measurement of top quark polarization in $tt$ $lepton+jets$ final states. Physical Review D, 95 (1): 011101. ISSN 1550-7998

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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:
?? nuclear and high energy physics ??
ID Code:
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Deposited On:
20 Dec 2017 13:52
Last Modified:
15 May 2024 02:49