CMS-PAS-SUS-15-012

CMS-PAS-SUS-15-012
Search for supersymmetry in events with photons and missing transverse energy
CMS Collaboration
April 2016

Abstract: The results of a search for new physics in final states with photons and missing transverse energy are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy $\sqrt{s} =$ 13 TeV with the CMS detector in 2015. The integrated luminosity of the sample is 2.32 fb $^{-1}$ . Many models of new physics, including supersymmetry (SUSY) with general gauge mediation (GGM), predict the production of events with photons, jets, and significant missing transverse energy. The data are used to search for GGM signatures in final states with two photons. No excess is observed with respect to the standard model expectation, and the results are used to set limits on gluino pair production in the GGM SUSY framework.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, PLB 769 (2017) 391. The superseded preliminary plots can be found here.

Figures
png	Figure 1: Decay of a gluino $\tilde{g}$ to an antiquark, quark, and neutralino, with subsequent decay of the neutralino to a $\gamma$ and a gravitino $\tilde{G}$ .
png pdf	Figure 2: Di-EM ${p_{\mathrm {T}}}$ distribution of the $\gamma \gamma$ candidate sample and $\mathrm{ ee }$ and $\mathrm{ ff }$ control samples. The ratios of the candidate sample to each of the control samples are shown below. These ratios serve as the reweighting factors for the events.
png pdf	Figure 3-a: ${E_{\mathrm {T}}^{\text {miss}}}$ distributions of the $\mathrm{ee}$ and $\mathrm{ff}$ control samples before (a) and after (b) reweighting by the di-EM ${p_{\mathrm {T}}}$ distribution.
png pdf	Figure 3-b: ${E_{\mathrm {T}}^{\text {miss}}}$ distributions of the $\mathrm{ee}$ and $\mathrm{ff}$ control samples before (a) and after (b) reweighting by the di-EM ${p_{\mathrm {T}}}$ distribution.
png pdf	Figure 4-a: ${E_{\mathrm {T}}^{\text {miss}}}$ distributions of the $\gamma \gamma$ and reweighted $\mathrm{ee}$ (a) and reweighted $\mathrm{ff}$ (b) control samples.
png pdf	Figure 4-b: ${E_{\mathrm {T}}^{\text {miss}}}$ distributions of the $\gamma \gamma$ and reweighted $\mathrm{ee}$ (a) and reweighted $\mathrm{ff}$ (b) control samples.
png pdf	Figure 5: Measured ${E_{\mathrm {T}}^{\text {miss}}}$ distribution in comparison with the background prediction in the signal region. The systematic uncertainty on the background prediction and the ratio of the data to the prediction are also shown.
png pdf	Figure 6: The 95% confidence level upper limits on the gluino pair production cross section as a function of gluino and neutralino masses. The contours show the observed and median expected exclusions assuming the NLO + NLL cross sections, with their one standard deviation uncertainties.

Compact Muon Solenoid
LHC, CERN