Double Pomeron Exchange (DPE) el. scatt. Karsten Eggert–

Final Differential Cross-Section B = 23.6 GeV -2 B = 20.1 GeV -2 Extrapolation to t = 0: Exponential slope Good agreement with the measurement at |t| > 0.36 GeV2 [EPL 95 (2011) 41001] Total elastic cross-section: Karsten Eggert–

Closest approach at 90 m run (~4.8 s) Karsten Eggert–

Correlation of the two protons Last run ( ~10 s ) t min ~ 1.5 10 -2 GeV 2 Int. luminosity: 1.9 mbarn -1 26 k elastic events This run( ~4.5 s ) t min ~ 4 10 -3 GeV 2 Karsten Eggert–

Run with b* = 90 m today (18. Oct. 2011) Beam configuration: 10 – 15 minibunches: 1 x 10 10 p/bunch (pile-up 0.005) TOTEM configuration: RP @ 5 s All detectors T1, T2 and RP operational Trigger: T1, T2 or RP bunch crossings to evaluate trigger efficiency Running time at least 4 hours Physics goals Luminosity indep. measurement of s tot Study of diffraction (SD and DPE) t - distribution of elast. scatt., DPE and SD |t| GeV2 Karsten Eggert–