Measurement of top quark polarization in t(t)over-bar lepton+jets final states
2017 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 95, no 1, 011101Article in journal (Refereed) Published
We present a measurement of top quark polarization in t (t) over bar pair production in p (p) over bar collisions at root 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) over bar 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) over bar production. The observed distributions are consistent with standard model predictions of nearly no polarization.
Place, publisher, year, edition, pages
2017. Vol. 95, no 1, 011101
IdentifiersURN: urn:nbn:se:uu:diva-316038DOI: 10.1103/PhysRevD.95.011101ISI: 000391860700001OAI: oai:DiVA.org:uu-316038DiVA: diva2:1077222
FunderGerman Research Foundation (DFG)Swedish Research Council