The t (t) over bar spin correlation at production is a fundamental prediction of QCD and a potentially incisive test of new physics coupled to top quarks. We measure the t (t) over bar spin state in p (p) over bar collisions at root s = 1.96 TeV using 1001 candidate events in the lepton plus jets decay channel reconstructed in the CDF II detector. In the helicity basis, for a top-quark mass of 172.5 GeV/c(2), we find a spin correlation coefficient k = 0.60 +/- 0.50 (stat) +/- 0.16 (syst), consistent with the QCD prediction, k approximate to 0.40.

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurement of t(t)over-bar spin correlation in p(p)over-bar collisions using the CDF II detector at the Tevatron. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(3), 031104-1-031104-7 [10.1103/PhysRevD.83.031104].

Measurement of t(t)over-bar spin correlation in p(p)over-bar collisions using the CDF II detector at the Tevatron

BARRIA, PATRIZIA;GAROSI, PAOLA;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

Abstract

The t (t) over bar spin correlation at production is a fundamental prediction of QCD and a potentially incisive test of new physics coupled to top quarks. We measure the t (t) over bar spin state in p (p) over bar collisions at root s = 1.96 TeV using 1001 candidate events in the lepton plus jets decay channel reconstructed in the CDF II detector. In the helicity basis, for a top-quark mass of 172.5 GeV/c(2), we find a spin correlation coefficient k = 0.60 +/- 0.50 (stat) +/- 0.16 (syst), consistent with the QCD prediction, k approximate to 0.40.
2011
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurement of t(t)over-bar spin correlation in p(p)over-bar collisions using the CDF II detector at the Tevatron. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(3), 031104-1-031104-7 [10.1103/PhysRevD.83.031104].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/21177
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