17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Measurements of WW, ZZ cross section and search for anomalous quartic gauge couplings at D0

18 Jul 2013, 15:45
15m
F2 (KTH Campus)

F2

KTH Campus

Talk presentation Top and Electroweak Physics Top and Electroweak Physics

Speaker

Sudeshna Banerjee (Tata Inst. of Fundamental Research (IN))

Description

We present measurements of WW and ZZ production cross sections, and anomalous quartic gauge couplings in p\bar{p} collisions at 1.96 TeV with Run II data from 8.6 fb−1 to 9.9 fb−1 collected by the D0 detector at the Fermilab Tevatron Collider. In the WW cross section measurement, the WW -> ee + MET, WW -> \mu\mu + MET, and WW -> e\mu + MET decay channels are used to measure the total and differential cross sections for WW production. The measured cross section is consistent with the standard model expectation and differential cross section measurements provide additional information to test higher order predictions. In the ZZ cross section measurement, we examine the final states eeee, ee\mu\mu, and \mu\mu\mu\mu. Based on selected data the measured cross section for ZZ is consistent with the standard model expectation. We extend these results to search for the standard model Higgs boson between 115 and 200 GeV. We also present a search for anomalous quartic gauge couplings (\gamma\gamma WW) using a sample of di-electron events with large missing energy. No excess above the SM background has been observed and limits on the anomalous parameters a_0^W and a_C^W are extracted.

Primary author

The DØ Collaboration (Fermi National Laboratory)

Presentation Materials