A search for new physics in central exclusive production using the missing mass technique with the CMS detector and the CMS-TOTEM precision proton spectrometer

The & collaborations
CMS-EXO-19-009, 2023.

Abstract (data abstract)
A generic search is presented for the associated production of a Z boson or a photon with an additional unspecified massive particle X,${\rm pp}\rightarrow {\rm pp} +{\rm Z}/\gamma+{\rm X}$, in proton-tagged events from proton-proton collisions at $\sqrt{s}=13\TeV$, recorded in 2017 with the CMS detector and the CMS-TOTEM precision proton spectrometer. The missing mass spectrum is analysed in the 600--1600 GeV range and a fit is performed to search for possible deviations from the background expectation. No significant excess in data with respect to the background predictions has been observed. Model-independent upper limits on the visible production cross section of ${\rm pp}\rightarrow {\rm pp} +{\rm Z}/\gamma+{\rm X}$ are set.

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Data from Figure 2 ({loc}), located on page 6.

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Comparison of the $m_{miss}$ shapes for the simulated signal events within the fiducial region and those outside it, after including...

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Data from Figure 2 ({loc}), located on page 6.

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Comparison of the $m_{miss}$ shapes for the simulated signal events within the fiducial region and those outside it, after including...

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Data from Figure 2 ({loc}), located on page 6.

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Comparison of the $m_{miss}$ shapes for the simulated signal events within the fiducial region and those outside it, after including...

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Data from Figure 2 ({loc}), located on page 6.

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Comparison of the $m_{miss}$ shapes for the simulated signal events within the fiducial region and those outside it, after including...

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Data from Figure 3 (left), located on page 8.

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Product of the acceptance times the combined reconstruction and identification efficiency, as a function of $m_{X}$ , for events generated...

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Data from Figure 3 (right), located on page 8.

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Product of the acceptance times the combined reconstruction and identification efficiency, as a function of $m_{X}$ , for different proton...

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Data from Figure 4 (upper left), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the negative arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (upper center), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the positive arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (upper right), located on page 9.

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Distributions of the reconstructed di-proton rapidity from the proton mixing procedure with simulated MC events, are compared to data. The...

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Data from Figure 4 (middle left), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the negative arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (middle center), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the positive arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (middle right), located on page 9.

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Distributions of the reconstructed di-proton rapidity from the proton mixing procedure with simulated MC events, are compared to data. The...

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Data from Figure 4 (lower left), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the negative arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (lower center), located on page 9.

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Distributions of the reconstructed proton $\xi$ in the positive arm from the proton mixing procedure with simulated MC events, are...

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Data from Figure 4 (lower right), located on page 9.

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Distributions of the reconstructed di-proton rapidity from the proton mixing procedure with simulated MC events, are compared to data. The...

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Data from Figure 5 (upper left), located on page 11.

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Data from Figure 5 (lower left), located on page 11.

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Data from Figure 6 (upper left), located on page 14.

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$m_{miss}$ distributions in the $pp\rightarrow ppZeeX$, with the protons reconstructed with the multi(+z)-multi(-z)method. The background distributions are shown after the...

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Data from Figure 6 (upper right), located on page 14.

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$m_{miss}$ distributions in the $pp\rightarrow ppZeeX$, with the protons reconstructed with the multi(+z)-single(-z)method. The background distributions are shown after the...

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Data from Figure 6 (lower left), located on page 14.

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$m_{miss}$ distributions in the $pp\rightarrow ppZeeX$, with the protons reconstructed with the single(+z)-multi(-z)method. The background distributions are shown after the...

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Data from Figure 6 (lower right), located on page 14.

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$m_{miss}$ distributions in the $pp\rightarrow ppZeeX$, with the protons reconstructed with the single(+z)-single(-z)method. The background distributions are shown after the...

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Data from Figure 7 (upper left), located on page 15.

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$m_{miss}$ distributions in the $pp\rightarrow ppZ\mu\mu X$, with the protons reconstructed with the multi(+z)-multi(-z)method. The background distributions are shown after...

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Data from Figure 7 (upper right), located on page 15.

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$m_{miss}$ distributions in the $pp\rightarrow ppZ\mu\mu X$, with the protons reconstructed with the multi(+z)-single(-z)method. The background distributions are shown after...

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Data from Figure 7 (lower left), located on page 15.

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$m_{miss}$ distributions in the $pp\rightarrow ppZ\mu\mu X$, with the protons reconstructed with the single(+z)-multi(-z)method. The background distributions are shown after...

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Data from Figure 7 (lower right), located on page 15.

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$m_{miss}$ distributions in the $pp\rightarrow ppZ\mu\mu X$, with the protons reconstructed with the single(+z)-single(-z)method. The background distributions are shown after...

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Data from Figure 8 (upper left), located on page 16.

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$m_{miss}$ distributions in the $pp\rightarrow pp\gamma X$, with the protons reconstructed with the multi(+z)-multi(-z)method. The background distributions are shown after...

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Data from Figure 8 (upper right), located on page 16.

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$m_{miss}$ distributions in the $pp\rightarrow pp\gamma X$, with the protons reconstructed with the multi(+z)-single(-z)method. The background distributions are shown after...

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Data from Figure 8 (lower left), located on page 16.

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$m_{miss}$ distributions in the $pp\rightarrow pp\gamma X$, with the protons reconstructed with the single(+z)-multi(-z)method. The background distributions are shown after...

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Data from Figure 8 (lower right), located on page 16.

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$m_{miss}$ distributions in the $pp\rightarrow pp\gamma X$, with the protons reconstructed with the single(+z)-single(-z)method. The background distributions are shown after...

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Data from Figure 7 ({loc}), located on page 17.

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Upper limits on the $pp\rightarrow ppZ/\gamma X$ cross section at 95% CL, as a function of $m_X$. The 68 and...

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Data from Figure 7 ({loc}), located on page 17.

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Upper limits on the $pp\rightarrow ppZ/\gamma X$ cross section at 95% CL, as a function of $m_X$. The 68 and...

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Data from Figure 7 ({loc}), located on page 17.

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Upper limits on the $pp\rightarrow ppZ/\gamma X$ cross section at 95% CL, as a function of $m_X$. The 68 and...

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Data from Figure 7 ({loc}), located on page 17.

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Upper limits on the $pp\rightarrow ppZ/\gamma X$ cross section at 95% CL, as a function of $m_X$. The 68 and...