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Standard Photon ID performance in GMSB susy samples Helen Hayward University of Liverpool.

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Presentation on theme: "Standard Photon ID performance in GMSB susy samples Helen Hayward University of Liverpool."— Presentation transcript:

1 Standard Photon ID performance in GMSB susy samples Helen Hayward University of Liverpool

2 Samples used Data samples: –GMSB1: shortlived neutralino-> standard pointing photons –GMSB2: Cgrav30 (non-pointing photons) –GMSB3: Cgrav55(non-pointing photons) –Background: JF17 is used. An eta cut of 2, pt cut of 20 GeV has been applied Using truth information to make sure I am only looking at photons whose parent is a susy particle.

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4 Photon selection cuts. Corrected width in 3 strips Fraction of energy in strips Energy in strips outside core Corrected width in 3x5 cells in middle Total width using 40 strips

5 Photon efficiencies (cuts applied sequentially) GMSB1GMSB2GMSB3 isEM&0x2 (hadronic leakage) 0.92 isEM&0x4 (2nd sampling) isEM&0x8(1st sampling)

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