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Measurement of ZZ boson Production in Pb+Pb Collisions at sNN=2.76\sqrt{s_{NN}}=2.76 TeV with the ATLAS Detector

Collaboration
Oct, 2012
18 pages
Published in:
  • Phys.Rev.Lett. 110 (2013) 2, 022301
  • Published: Jan 8, 2013
e-Print:
DOI:
Report number:
  • CERN-PH-EP-2012-223
Experiments:
View in:
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Abstract: (APS)
The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15  nb-1 of integrated luminosity obtained in the 2011 LHC Pb+Pb run at sNN=2.76  TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. Results from the two channels are consistent and are combined. Within the statistical and systematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z boson with respect to the event plane is found to be consistent with zero.
Note:
  • 5 pages plus author list (19 pages total), 5 figures, submitted to Phys. Rev. Letters
  • 25.75.Cj
  • 23.70.+j
  • 25.75.Dw
  • 14.70.Hp
  • Z0: hadroproduction
  • angular distribution: anisotropy
  • heavy ion: scattering
  • lead
  • model: Glauber
  • ATLAS
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