1 / 7

Bialas –Landshoff model revisited

Bialas –Landshoff model revisited. Phys.Lett. B256(1991) 540. H. Pioneering work generated much further activity Based on the non-PT treatment of the lowest-order diagrams ‘…. Thus our calculation really is an inclusive one’ (that is, it is NOT an exclusive result)

mikemurphy
Télécharger la présentation

Bialas –Landshoff model revisited

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bialas –Landshoff model revisited Phys.Lett. B256(1991) 540 H Pioneering work generated much further activity Based on the non-PT treatment of the lowest-order diagrams ‘….Thus our calculation really is an inclusive one’ (that is, it is NOTan exclusive result) Recently several attempts to resurrect this approach (Saclay’s group..)

  2. ●No quantitative predictive power • strongIRsensitivity • ∫dQ²t/Q²t ~ 1/μ² • uncontrollablehigher-order radiative corrections • ~αs(μ²) log²(M²/μ²) ; ~αs(μ²)log s/μ²) • ● Exclusiveness requires Gap Keepers • (soft rescattering survival factor & Sudakov form-factor) • Otherwise-> 2-3 orders of magnitude overshooting • ●Can these be by-passed ? • (e.g. by renormalizing using the observed rate of Central Inelastic • JJ events) • NO • On top of many other problems( M, s, process dependence..) • there is no Jz=0 selection rule: • Corrections of order of <pt²>/<Qt²>

  3. CPX MSSM Higgs (KMR-03) CP odd active at non-zero t CP even many other possibilities , e.g. 0++ Selection rule Also, since resolution of taggers > Higgs width: QCD Background ~ But tt mode has only QED background B.C., Forshaw, Lee, Monk and Pilaftsis hep-ph/0303206 Khoze, Martin and Ryskin hep-ph/0401078

  4. CPX MSSM Higgs (KMR-03) CP odd active at non-zero t CP even many other possibilities , e.g. 0++ Selection rule Also, since resolution of taggers > Higgs width: QCD Background ~ But tt mode has only QED background B.C., Forshaw, Lee, Monk and Pilaftsis hep-ph/0303206 Khoze, Martin and Ryskin hep-ph/0401078

  5. Factorization breaking in diffractivedijet photoproduction Resolved photoproduction: Direct photoproduction:  Factorization breaking

  6. Hadronic collisions: Photoproduction: Two-Channel EikonalModel Generalized vector mesondominance: Survival probability: Survival probability: R  |S|2 0.34 KMR 00, KKMR 01 KKMR-03

More Related