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C entral Ex clusive M eson P air P roduction in the P erturbative R egime.

C entral Ex clusive M eson P air P roduction in the P erturbative R egime. (KRYSTHAL collaboration). V.A. Khoze ( IPPP, Durham ). This Workshop: (talks by Piotr & Antoni). On the same pasture: activity by Cracow group Antoni Szczurek et al. ( Fernando Marvilla, 2008). ( or LRGs ).

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C entral Ex clusive M eson P air P roduction in the P erturbative R egime.

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

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

  3. (or LRGs) CEP-spin-parity filter (KMR-00,KKMR-03) 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.

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

  5. (to be published in PRL soon) C-parity)

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

  7. 40 diagrams (4 basic)  (M.Benayoun,V.Chernyak,-1990)

  8. (explicit calculation) is this easy to understand ?

  9. is this easy to understand ? currently popular (among the more formal community) MHV- technique

  10. g g

  11. (KRYSTHAL coll.- 09-11)

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

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

  14. (preliminary)

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

  16. (preliminary)

  17. PT expectations if no proton tagging Violation of ppY+X+Z -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 ~ ). for CEP (KMRS-04) Spin-2 quarkonium suppression is easier to violate!

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