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

Aaltonen T.
•
Alvarez Gonzalez B.
•
Amerio S.
altro
SCURI, Fabrizio
2012
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
The angular distributions of muons from gamma(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 gamma mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of gamma(3S) mesons. Within the kinematic range of gamma rapidity vertical bar y vertical bar < 0.6 and p(T) up to 40 GeV/c, the angular distributions are found to be nearly isotropic.
DOI
10.1103/PhysRevLett.108.151802
WOS
WOS:000302638900002
Archivio
http://hdl.handle.net/11390/879560
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84859792776
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Scopus© citazioni
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Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
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Data di acquisizione
Mar 28, 2024
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Data di acquisizione
Apr 19, 2024
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