Publications (2)0 Total impact
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CDF Collaboration,
T. Aaltonen,
B. Alvarez González,
S. Amerio,
D. Amidei,
A. Anastassovx,
A. Annovi,
J. Antos,
G. Apollinari,
J. A. Appel, [......],
K. Yorita,
T. Yoshidal,
G. B. Yu,
I. Yu,
S. S. Yu,
J. C. Yun,
A. Zanetti,
Y. Zeng,
C. Zhou,
S. Zucchelli
[show abstract]
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ABSTRACT: This Letter describes the current most precise measurement of the $WZ$
production cross section as well as limits on anomalous $WWZ$ couplings at a
center-of-mass energy of 1.96 TeV in proton-antiproton collisions for the
Collider Detector at Fermilab (CDF). $WZ$ candidates are reconstructed from
decays containing three charged leptons and missing energy from a neutrino,
where the charged leptons are either electrons or muons. Using data collected
by the CDF II detector (7.1 fb$^{-1}$ of integrated luminosity), 63 candidate
events are observed with the expected background contributing $8 \pm 1$ events.
The measured total cross section $\sigma (p \bar p \to WZ) =
3.93_{-0.53}^{+0.60}(\text{stat})_{-0.46}^{+0.59}(\text{syst}) $ pb is in good
agreement with the standard model prediction of $3.50\pm 0.21$. The same sample
is used to set limits on anomalous $WWZ$ couplings.
02/2012;
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T. Aaltonen,
B. Álvarez Gonzálezz,
S. Amerio,
D. Amidei,
A. Anastassovx,
A. Annovi,
J. Antos,
G. Apollinari,
J. A. Appel,
T. Arisawa, [......],
K. Yorita,
T. Yoshidal,
G. B. Yu,
I. Yu,
S. S. Yu,
J. C. Yun,
A. Zanetti,
Y. Zeng,
C. Zhou,
S. Zucchelliee
[show abstract]
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ABSTRACT: The angular distributions of muons from Upsilon(1S,2S,3S) to mu+mu- decays
are measured using data from proton anti-proton collisions at sqrt(s)=1.96 TeV
corresponding to an integrated luminosity of 6.7 /fb 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 the
Upsilon mesons in both the Collins-Soper and s-channel helicity frames. This is
also the first measurement of spin alignment of Upsilon(3S) mesons. Within the
kinematic range of Upsilon rapidity |y|<0.6 and pT up to 40 GeV/c, the angular
distributions are found to be nearly isotropic.
12/2011;
