Diboson production and triple gauge coupling limits in ATLAS

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Date/Time:Wednesday, 31 Aug 2011 from 4:10 pm to 5:10 pm
Location:A401, Zaffarano Hall
Contact:Chunhui Chen
Phone:515-294-5062
Channel:High Energy Physics
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Dr. Shih-Chieh Hsu, Lawrence Berkeley National Laboratory

The production of pairs of bosons (W,Z,gamma) at the highest available energies delivered by Large Hadron Collider (LHC) is of great interest since it provides an unique opportunity to test the predictions of the electroweak sector of the Standard Model at the TeV energy scale, and it is the irreducible background to the search for the Higgs boson and new physics signatures.

The first measurement of ZZ production and the results of WW, WZ, Wgamma and Zgamma production cross sections are reported in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector. In a data sample corresponding to an integrated luminosity of 35pb-1 (2011) ~1.02 fb-1 (2011), no significant deviations from the Standard Model expectations are observed. The most stringent ZZZ/gamma and competitive WWZ anomalous triple gauge coupling limits are derived.