V.A. Khoze ( IPPP, Durham )
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Transcript of V.A. Khoze ( IPPP, Durham )
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V.A. Khoze (IPPP, Durham)
(based on works by V.KHoze, M. RYskin and W.J. STirling and L. HArland-Lang)
Central Diffractive Production ofHeavy Quarkonia.
(KHRYSTHAL collaboration)
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Forward proton distributions and correlations.
Tevatron, RHIC and LHC.
CDP@LHC with FSC
(topical examples)With a bit of personal flavour
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(star reactions!)
New D0 jj- resultsRHIC, ALICE data expected
Detailed tests of dynamics of soft diffraction (KMR-02)
Spin-Parity Analyzer (KKMR-2003)
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,b
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• Prospects for high accuracy (~1%) mass measurements (irrespectively of the decay mode).
• Quantum number filter/analyser. ( 0++ dominance ;C,P-even) • H ->bb opens up (Hbb- coupl.) (gg)CED bb in LO ; NLO,NNLO, b- mass effects - controllable. • For some areas of the MSSM param. space CEDP may become a discovery
channel !• H →WW*/WW - an added value ( less challenging experimentally + small bgds., better PU cond. )
• New leverage –proton momentum correlations (probes of QCD dynamics , CP- violation effects…)
LHC : ‘after discovery stage’, Higgs ID……
H
How do we know what we’ve found?
mass, spin, couplings to fermions and Gauge Bosons, invisible modes… for all these purposes the CEDP will be particularly handy !
CED Higgs production at the LHC
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“soft” scattering can easily destroy the gaps
gap
gap
eikonal rescatt: between protonsenhanced rescatt: involving intermediate partons
M
soft-hardfactorizn
conservedbroken
Subject of hot discussions recently :Subject of hot discussions recently : S²S²enhenh
S² absorption effects -necessitated by unitarity
Everybody’s ~ happy (KMR, GLMM, FHSW, KP, S.Ostapchenco. Petrov et al, BH, GGPS, MCs..)
(Beatriz)
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‘Better to light a candle than to rant against darkness’
( Confucius )
Standard Candle ProcessesStandard Candle Processes
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Our 3 measurements are all in good agreement (factor “few”) with the Durham group predictions.
*
*
*Prpospects !
FSC@LHC
(more coming soon )
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CDF Collaboration, arXiv:0902.1271 [hep-ex], PRL
KMRS -2004: 130 nb 80 nb (PDG-2008)
/KK mode as a spin-parity analyzer
Prospects of (b)-spectroscopy , FSC@CMS
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(Currently no complete theoretical description of onium properties.)
(BABAR (2008)) (Still puzzles)
(spins- still unconfirmed)
The heaviest and most compact quark-antiquark bound state in nature
P-wave Bottomonia
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1111
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Charmonium –like XYZ states
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still unobserved
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(maybe two different states X(3872), X(3875) )
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What we expect within the framework of the Perturbative Durham formalism (KMR-01, KKMR-03, KMRS-04, HKRS-10)
Example, O++ -case
*KNLO
Strong sensitivity to the polarization structure of the vertex in the bare amplitude.
Absorption is sizeably distorted by the polarization structure (affects the b-space distr.)
KMR-02, KKMR-03,HKRS 09-10
KMR-01
Forward proton distributions& correlations- possibility to test diffraction dynamics KMR-02
(Gap size
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Too good to be true ?!
Phys.Rev.Lett.102:242001,2009
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(HKRS-09,10)
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(A. Alekseev-1958-positronium)
(R.Pasechnik et al, Phys.Lett.B680:62-71,2009; HKRS, Eur.Phys.J.C65:433-448,2010)
KMR-01
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1 : 0.6 : 0.22
2
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Central Diffractive Production of
(Crystal Bal -1986)
(about 0.25 of all hadronic decays (CLEO-2009) (Barbieri et al (1979), NRQCD )
FSC@LHCb ?
Suppressed non-resonant background
3 % .
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1 : 0.03 : 0.08
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(0 ) /d d
Very topical for STAR@RHIC forthcoming measurements with tagged forward protons(new KHRYSTHAL results soon to be released).
KKMR-03
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KHRYSTHAL-2010
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( Alice is installing counters )
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(And the same for Alice)
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, KK, ,
New STAR@RHIC results on CEP with tagged forward protons soon to come.
Prospects of CDP studies at ALICE & LHCb (Rainer)
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Thank You
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UNCERTAINTIES UNCERTAINTIES
Known Unknowns
Unknown Unknowns
N(N)LO- radiative effects (K-factors etc..) ‘…possible inadequancy of PT theory in s …’ R.Barbieri et al-1980 ‘ ‘Right’ choice of gluon densities, in particular at so low scales as in the case ( potentiality of a factor of ~3 rise for the H-case ) .
Complete model for calculation of enhanced absorption. -experimental widths, decays…
Gluons at so low scales, surprises are not excluded at all.
c
b
Non- pQCD effects in the meson characteristics. Currently no complete description of heavy quarkonium characteristics.‘Two gluon width does not tell the whole story.’
Factor of 5 up or down Factor of 5 up or down (conservatively) (conservatively)
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JINST-09
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