blois-2003

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IntroductionWhat is hadronic diffraction?PROTON-PROTON ELASTIC SCATTERINGdσdtPROTONBEAMpTARGETPROTONp'DIFFRACTIONPATTERN∆PLξ =P2d σ2coherencedt dMLDiffractiondissociationM=S2Xm≤mπpP 0R TR L∆ P T, ∆ P LmP p01~ξMXKG, Phys. Rep. 101 (1983) 1714-7 June <strong>2003</strong> K. Goulianos, Low-x Workshop, Nafplion 2
"rapidity gaps are regions of rapidity devoid of particlesFrom Poisson statistics:P(∆η)Diffraction and Rapidity Gaps! Non-diffractive interactions: ! Diffractive interactions:rapidity gaps are formed byrapidity gaps, like diamonds,multiplicity fluctuations‘live for ever’=e−ρ∆y⎛⎜ ρ =⎝dn ⎞⎟dy ⎠(r=particle density in rapidity space)∆y≈ − lnξ=pXxDIFFRACTIVECLUSTERIPln s − ln M0ηmaxpRAPIDITYGAP-ln ξp2protonln(2p/p )TdGaps are exponentially suppressedσ2dM1M~2d→σ ~ constantd∆y" large rapidity gaps are signatures for diffraction
Page 1: Soft and Hard Diffraction at CDFKon
Page 5 and 6: ! Elastic scattering! Total cross s
Page 7 and 8: Soft Single Diffraction Datap( p) +
Page 9 and 10: Two-Gap Diffraction (hep-ph/0205141
Page 11 and 12: Soft Double Pomeron Exchange# Roman
Page 14 and 15: Diffractive Dijets with Leading Ant
Page 16 and 17: Dijets in Double Pomeron ExchangeTe
Page 18 and 19: Run II Forward Detector Layout
Page 20 and 21: J5RP inclusiveRP+J5RP+J5+BSC-GAP_pR
Page 22 and 23: Diffractive Dijet Structure Functio
Page 24 and 25: Data SelectionDPE: RP+J5+BSC_GAP_pS
Page 26 and 27: Inclusive/Exclusive DPE Dijet Predi
Page 28 and 29: Run II: Exclusive DPE Dijets ?No ex
Page 30: SUMMARYSoft and hard conclusions$ S

blois-2003

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