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Measurements of the angular distributions of muons from Y decays in pp¯ collisions vs = 1.96 TeV

Abstract: The angular distributions of muons from ð1S; 2S; 3SÞ ! þ decays are measured using data from pp collisions at ffiffis p ¼ 1:96 TeV corresponding to an integrated luminosity of 6:7 fb1 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 mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of ð3SÞ mesons. Within the kinematic range of rapidity jyj < 0:6 and pT up to 40 GeV=c, the angular distributions are found to be nearly isotropic.

Other publications of the same journal or congress with authors from the University of Cantabria

Authorship: Aaltonen T., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bisello D., Bizjak I., Bland K.R., Bl

Fuente: Physical Review Letters, 2012, 108(15), 151802

Publisher: American Physical Society

Publication date: 01/04/2012

No. of pages: 8

Publication type: Article

DOI: 10.1103/PhysRevLett.108.151802

ISSN: 0031-9007,1079-7114

Publication Url: https://doi.org/10.1103/PhysRevLett.108.151802

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