@article{10902/2142,
year = {2012},
month = {4},
url = {http://hdl.handle.net/10902/2142},
abstract = {The angular distributions of muons from Υ(1S,2S,3S)→μ+μ- decays are measured using data from pp̅ collisions at √s=1.96  TeV corresponding to an integrated luminosity of 6.7  fb-1 and collected with the CDF II detector at the Fermilab Tevatron. This analysis is the first to report the full angular distributions as functions of transverse momentum pT for Υ mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of Υ(3S) mesons. Within the kinematic range of Υ rapidity |y|<0.6 and pT up to 40  GeV/c, the angular distributions are found to be nearly isotropic.},
publisher = {American Physical Society},
publisher = {Physical review letters, vol. 108, iss. 15, art. num. 151802 (2012)},
title = {Measurements of the Angular Distributions of Muons from Υ Decays in pp̅ Collisions at √s=1.96  TeV},
author = {Aaltonen, Timo Antero and Amerio, Silvia and Amidei, Dante and Anastassov, Anton and Annovi, Alberto and Antos, Jaroslav and Apollinari, Giorgio and Appel, Jeffrey A. 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 and Vizán García, Jesús Manuel and Arisawa, Tetsuo and Álvarez González, Bárbara},
}