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.

T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2012). Measurements of the Angular Distributions of Muons from Υ Decays in pp̅ Collisions at √s=1.96  TeV. PHYSICAL REVIEW LETTERS, 108, 151802-1-151802-8 [10.1103/PhysRevLett.108.151802].

Measurements of the Angular Distributions of Muons from Υ Decays in pp̅ Collisions at √s=1.96  TeV

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2012

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.
2012
T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2012). Measurements of the Angular Distributions of Muons from &#933; Decays in pp&#773; Collisions at &#8730;s=1.96&#8201;&#8201;TeV. PHYSICAL REVIEW LETTERS, 108, 151802-1-151802-8 [10.1103/PhysRevLett.108.151802].
T. AALTONEN; B. ÁLVAREZ GONZÁLEZ; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J. APPEL; T. ARISAWA; A. ARTIKOV; J. ASAADI...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/122875
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