Search for high-mass exclusive $\gamma\gamma$$\to WW and \gamma\gamma$$\to$ ZZ production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The & collaborations
CMS-SMP-21-014, 2022.

Abstract (data abstract)
A search is performed for exclusive high-mass $\gamma\gamma \to WW$ and $\gamma\gamma \to ZZ$ production in proton-proton collisions using intact forward protons reconstructed in near-beam detectors, with both weak bosons decaying into boosted and merged jets. The analysis is based on a sample of proton-proton collisions collected by the CMS and TOTEM experiments at $\sqrt{s}=13$~TeV, corresponding to an integrated luminosity of 100~$\mathrm{fb}^{-1}$. No excess above the standard model background prediction is observed, and upper limits are set on the $pp \to pWWp$ and $pp \to pZZp$ cross sections in a fiducial region defined by the diboson invariant mass $m(VV)>1$~TeV (with $V =W,Z$) and proton fractional momentum loss $0.04 < \xi < 0.20$. The results are interpreted as new limits on dimension-6 and dimension-8 anomalous quartic gauge couplings.

• #### $a_0^W$ Limit

Data from Figure 8

10.17182/hepdata.135991.v1/t1

Expected and observed upper limits on the AQGC operators $a^W_0/\Lambda^2$, with no unitarization. The $y$ axis shows the limit on...

• #### $a_C^W$ Limit

Data from Figure 8

10.17182/hepdata.135991.v1/t2

Expected and observed upper limits on the AQGC operators $a^W_C/\Lambda^2$, with no unitarization. The $y$ axis shows the limit on...

• #### $a_0^Z$ Limit

Data from Figure 8

10.17182/hepdata.135991.v1/t3

Expected and observed upper limits on the AQGC operators $a^Z_0/\Lambda^2$, with no unitarization. The $y$ axis shows the limit on...

• #### $a_C^Z$ Limit

Data from Figure 8

10.17182/hepdata.135991.v1/t4

Expected and observed upper limits on the AQGC operators $a^Z_C/\Lambda^2$, with no unitarization. The $y$ axis shows the limit on...

• #### Limits on LEP-like dimension-6 AQGC parameters

Data from Table 3

10.17182/hepdata.135991.v1/t5

Limits on LEP-like dimension-6 anomalous quartic gauge coupling parameters, with and without unitarization via a clipping procedure.

• #### Limits on dimension-8 operators - vanishing $WWZ\gamma$ coupling

Data from Table 4

10.17182/hepdata.135991.v1/t6

Conversion of limits on $a^W_0$ to dimension-8 $f_{M,i}$ operators, using the assumption of vanishing $WWZ\gamma$ couplings to eliminate some parameters....

• #### Limits on dimension-8 operators - all other couplings are zero.

Data from Table 5

10.17182/hepdata.135991.v1/t7

Conversion of limits on $a^W_0$ and $a^W_C$ to dimension-8 $f_{M,i}$ operators, using the assumption that all $f_{M,i}$ except one are...

• #### WW 2D limit plot

Data from Figure 9

10.17182/hepdata.135991.v1/t8

{Expected and observed limits in the two-dimensional plane of $a^W_0/\Lambda^2$ vs. $a^W_C/\Lambda^2$. The limits are described by analytical ellipses of...

• #### WW 2D clipped limit plot

Data from Figure 9

10.17182/hepdata.135991.v1/t9

{Expected and observed limits in the two-dimensional plane of $a^W_0/\Lambda^2$ vs. $a^W_C/\Lambda^2$ with unitarization imposed by clipping the signal model...

• #### ZZ 2D limit plot

Data from Figure 9

10.17182/hepdata.135991.v1/t10

{Expected and observed limits in the two-dimensional plane of $a^Z_0/\Lambda^2$ vs. $a^Z_C/\Lambda^2$. The limits are described by analytical ellipses of...

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