Abstract
We present a phenomenology study on central exclusive production of W+W− boson pairs in proton-proton collisions at the Large Hadron Collider at 14 TeV using the forward proton detectors, such as the ATLAS Forward Proton or the CMS-TOTEM Precision Proton Spectrometer detectors. Final states where at least one of the W bosons decay hadronically in a large-radius jet are considered. The latter extends previous efforts that consider solely leptonic final states. A measurement of exclusive W+W− also allows us to further constrain anomalous quartic gauge boson interactions between photons and W bosons. Expected limits on anomalous quartic gauge couplings $$ {a}_{0,C}^W $$
a
0
,
C
W
associated to dimension-six effective operators are derived for the hadronic, semi-leptonic, and leptonic final states. It is found that the couplings can be probed down to one-dimensional values of $$ {a}_0^W=3.7\times {10}^{-7}{\mathrm{GeV}}^{-2} $$
a
0
W
=
3.7
×
10
−
7
GeV
−
2
and $$ {a}_C^W=9.2\times {10}^{-7}{\mathrm{GeV}}^{-7} $$
a
C
W
=
9.2
×
10
−
7
GeV
−
7
at 95% CL at an integrated luminosity of 300 fb−1 by combining all final states, compared to values of about $$ {a}_0^W=4\times {10}^{-6}{\mathrm{GeV}}^{-2} $$
a
0
W
=
4
×
10
−
6
GeV
−
2
and $$ {a}_C^W=1\times {10}^{-5}{\mathrm{GeV}}^{-2} $$
a
C
W
=
1
×
10
−
5
GeV
−
2
at 95% CL expected for the leptonic channel alone.
Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at s=13TeV