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Central Exclusive Meson Pair Production in the Perturbative Regime. V.A. Khoze ( IPPP, Durham ) (KRYSTHAL collaboration)

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Presentation on theme: "Central Exclusive Meson Pair Production in the Perturbative Regime. V.A. Khoze ( IPPP, Durham ) (KRYSTHAL collaboration)"— Presentation transcript:

1 Central Exclusive Meson Pair Production in the Perturbative Regime. V.A. Khoze ( IPPP, Durham ) (KRYSTHAL collaboration)

2 On the same pasture: activity by Cracow group Antoni Szczurek et al ( Fernando Marvilla, 2008) This Workshop: (talks by Piotr & Antoni)

3 CEP is reported by LHCb (DIS-11) new CDF CEP results ( low x-11,DIS-11 All measurements in agreement with Durham group (pre)dictions. CEP-spin-parity filter (KMR-00,KKMR-03 ) ( or LRGs )

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5 (KMRS-04) (LKRS-10) Now 43 events (now proved to be very small (CDF) in agreement with our expectations)

6 (to be published in PRL soon) C-parity)

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8 NLO effects- factor of 1.55 (HKRS in preparation) Currently theoret. uncertainties are under further revision.

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11 (M.Benayoun,V.Chernyak,-1990) 40 diagrams (4 basic) 

12 (explicit calculation) is this easy to understand ?

13 currently popular (among the more formal community) MHV- technique

14 g g

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17 (KRYSTHAL coll.- 09-11)

18 New CDF data nicely confirm this ! ) (K-factor,..) (our new results will be available soon)

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20 arXiv:1110.4787 Acta Phys.Polon.B42:1961,2011 R..Staszewski et al, (currently under study )

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22 (preliminary)

23 New CDF data confirm both Durham predictions for CEP and strong suppression of the

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28 (preliminary)

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30 PT expectations if no proton tagging Violation of -momentum transfer through the ‘digluon Pomeron’ In the low mass region: is small. Non-relativistic effects for spin 2. Non-PT contribution ( for spin 1, still ~ ). Spin-2 quarkonium suppression is easier to violate! for CEP (KMRS-04) pp  Y+X+Z

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