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Sensitivity physics expected to the measurement of the quartic $WWγγ$ couplings at the LHeC and the FCC-he (2003.06669v2)

Published 14 Mar 2020 in hep-ph

Abstract: We explore the physics expected sensitivity at the Large Hadron electron Collider (LHeC) and the Future Circular Collider-hadron electron (FCC-he) to search for the anomalous quartic $WW\gamma\gamma$ couplings in single $W$-boson production in association with a photon. We study the process $ep \to e-\gamma* p \to eW\gamma q'X$ via the subprocess $\gamma* q \to W\gamma q'$. The center-of-mass energies and luminosities of the LHeC are assumed to be $\sqrt{s}=1.30, 1.98$ TeV, ${\cal L}=10-100$ ${\rm fb{-1} }$ and for the FCC-he $\sqrt{s}=3.46, 5.29$ TeV and ${\cal L}=100-1000$ ${\rm fb{-1} }$. With these energies and luminosities, we estimate bounds on the anomalous quartic $WW\gamma\gamma$ couplings at $95\%$ C.L., which can be an order of magnitude stringent than the experimental limits report by ATLAS and CMS Collaborations at the LHC.

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