The angular distributions of muons from Y(1S, 2S, 3S) -> mu(+)mu(-) decays are measured using data from p (p) over bar collisions at root 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 p(T) for Y mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of Y(3S) mesons. Within the kinematic range of Y rapidity |y| < 0.6 and p(T) up to 40 GeV/c, the angular distributions are found to be nearly isotropic.

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2012). Measurements of the Angular Distributions of Muons from Y Decays in p(p)over-bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 108(15) [10.1103/PhysRevLett.108.151802].

Measurements of the Angular Distributions of Muons from Y Decays in p(p)over-bar Collisions at root s=1.96 TeV

BARRIA, PATRIZIA;GAROSI, PAOLA;MAESTRO, PAOLO;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2012-01-01

Abstract

The angular distributions of muons from Y(1S, 2S, 3S) -> mu(+)mu(-) decays are measured using data from p (p) over bar collisions at root 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 p(T) for Y mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of Y(3S) mesons. Within the kinematic range of Y rapidity |y| < 0.6 and p(T) up to 40 GeV/c, the angular distributions are found to be nearly isotropic.
2012
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2012). Measurements of the Angular Distributions of Muons from Y Decays in p(p)over-bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 108(15) [10.1103/PhysRevLett.108.151802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/29996
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