@article{10902/1970,
year = {2011},
month = {2},
url = {http://hdl.handle.net/10902/1970},
abstract = {The tt̅ 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 tt̅ spin state in pp̅ collisions at √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/c2, we find a spin correlation coefficient κ=0.60±0.50  (stat)±0.16  (syst), consistent with the QCD prediction, κ≈0.40.},
organization = {We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of
Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the
Bundesministerium für Bildung und Forschung, Germany; the World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R & D Agency; and the Academy of Finland.},
publisher = {American Physical Society},
publisher = {Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 83(3), 031104(R)},
title = {Measurement of tt̅ spin correlation in pp̅ collisions using the CDF II detector at the Tevatron},
author = {Aaltonen, Timo Antero and Álvarez González, Bárbara and Casal Laraña, Bruno and Cuevas Maestro, Francisco Javier and Gómez Gramuglio, Gervasio and Palencia Cortezón, José Enrique and Rodrigo Anoro, Teresa and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vila Álvarez, Iván  and Vilar Cortabitarte, Rocío},
}