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Volume 350 - 7th Annual Conference on Large Hadron Collider Physics (LHCP2019) - Parallel EW
Recent diboson and multiboson results in ATLAS
M. Cristinziani
Full text: pdf
Pre-published on: 2019 August 08
Published on:
Abstract
Recent measurements of the associated production of two or three massive vector
bosons in proton-proton collisions at the Large Hadron Collider, collected by
the ATLAS detector at a centre-of-mass energy of $\sqrt{s} = 13$ TeV, are
reported. The diboson analyses target the production and decay modes
$WW\rightarrow e\nu_e\mu\nu_\mu$, $WZ \rightarrow \ell^{\prime} \nu \ell
\ell\,(\ell = e, \mu)$, $ZZ \rightarrow \ell\ell\nu\nu$, and the $4\ell$ final
state. Fiducial inclusive cross sections are compared to state-of-the-art
Standard Model calculations and several unfolded differential distributions are
measured. In the $WZ$ channel, the helicities of the $W$ and $Z$ bosons are
probed. Results are interpreted in terms of limits on anomalous gauge
couplings in the framework of effective field theories. Finally, the first
evidence for the production of three massive vector bosons ($WWW$, $WWZ$,
$WZZ$) is presented.
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