SUS-12-001

Abstract

We have performed a search for supersymmetry in a gauge-mediation scenario with the gravitino as the lightest supersymmetric particle. The data sample corresponds to an integrated luminosity of 4.93 fb^-1 of pp collisions at sqrt(s) = 7 TeV, recorded by the CMS experiment at the LHC.We compare the missing transverse energy distribution in events containing either at least two photons plus at least one hadronic jet or at least one photon plus at least two hadronic jets to the spectra expected from standard model processes. No excess of events at high missing transverse energy is observed and upper limits on the signal production cross sections of order 0.01 pb (0.1 pb) at the 95% confidence level for the bino-like (wino-like) scenarios are determined for a range of squark, gluino, and neutralino masses. This analysis is also re-interpreted as a search for Universal Extra Dimensions leading to 95% exclusion values of 1/R < 1380 GeV for NLEDs = 6.

The preliminary version of this analysis is documented in Physics Analysis Summary SUS-12-001 and the final version is submitted to JHEP and available as arXiv:1211.4784

Plots

Figure	Caption
	Figure 1: ETmiss spectrum of γγ data compared to QCD prediction together with the small EWK background for events with at least one jet. The hatched areas indicate the total background uncertainties. Two example GGM points on either side of our exclusion boundary (squark/gluino/LSP masses given in GeV) are also shown.
	Figure 2a: 95% C.L. upper limits on the signal cross section in gluino-squark mass space for bino-like neutralinos for the diphoton analysis
	Figure 2b: 95% C.L. exclusion contours in gluino-squark mass space for bino-like neutralinos for the diphoton analysis. The shaded uncertainty band around the exclusion contours correspond to the NLO renormalization and PDF uncertainties of the signal cross section.
	Figure 2c: 95% C.L. upper limits on the signal cross section in gluino-squark mass space for wino-like neutralinos for the diphoton analysis
	Figure 2d: 95% C.L. exclusion contours in gluino-squark mass space for wino-like neutralinos for the diphoton analysis. The shaded uncertainty band around the exclusion contours correspond to the NLO renormalization and PDF uncertainties of the signal cross section.
	Figure3a: 95% C.L. upper limits on the signal cross section in gluino-bino mass space for bino-like neutralinos for the diphoton analysis.
	Figure3b: 95% C.L. exclusion contours in gluino-bino mass space for bino-like neutralinos for the diphoton analysis. The shaded uncertainty band around the exclusion contours correspond to the NLO renormalization and PDF uncertainties of the signal cross section.
	Figure 4: Total standard model background prediction compared to the number of singlephoton events, including two GGM benchmark signal benchmark points as examples where squark/gluino/LSP masses given in GeV.
	Figure 5a: 95% C.L. upper limits on the signal cross section in gluino-squark mass space for bino-like neutralinos for the single photon analysis
	Figure 5b: 95% C.L. exclusion contours in gluino-squark mass space for bino-like neutralinos for the single photon analysis
	Figure 5c: 95% C.L. upper limits on the signal cross section in gluino-squark mass space for wino-like neutralinos for the single photon analysis
	Figure 5d: 95% C.L. exclusion contours in gluino-squark mass space for wino-like neutralinos for the single photon analysis
	Figure 6a: 95% C.L. exclusion contours on the signal cross section in gluino-bino mass space for bino-like neutralinos for the single photon analysis.
	Figure 6b: 95% C.L. exclusion contours in gluino-bino mass space for bino-like neutralinos for the single photon analysis
	Figure 7a: The UED cross section upper limit for 6 LEDs at the 95% C.L. is compared with UED LO production cross sections. Intersection of the central cross section value implies exclusion of all values of 1/R < 1380 GeV for 6 LEDs. The shaded region shows uncertainty due to PDFs and renormalization scale.
	Figure 7b: The UED cross section upper limit for 2 LEDs at the 95% C.L. is compared with UED LO production cross sections. Intersection of the central cross section value implies exclusion of all values of 1/R < 1350 GeV for 2 LEDs. The shaded region shows uncertainty due to PDFs and renormalization scale.

-- ManfredPaulini - 09-Jan-2013