Experimental summary Hiro Aihara University of Tokyo 41st Rencotres de Moriond QCD and High Energy Hadronic Interactions La Thuile, Aosta valley, Italy March 18-25, 2006
First of all, I wish to thank • all the speakers who brought great new results to this conference and gave excellent talks (~60 experimental talks). • the organizers who once again made this conference a success. • Tran Thanh Van for his dedication to “Moriond” conference for 40 long years. • Many of us grew up with this institution.
I owe a lot to excellent overviews by A. Golutvin : Heavy Flavors H. Kowalski : Small x and Diffraction F.Yuan : Spin physics C. Salgado : Heavy Ions
The Status of the EW Standard Model
Bs Mixing A=0 No mixing, A=1 Mixing CDF 355pb-1 D0 1000pb-1 ms > 8.6 ps-1 @ 95%C L Sensitivity:13.0 ps-1 @ 95%CL A deviation of ~2.5 from 0 at ms~19 ps-1 Md. Naimuddin
Likelihood analysis Md. Naimuddin • Resolution • K-factor variation by 2% • BR (BsDsX) • ccbar contamination • BR (BsDsDs) Syetematics 17 < Dms < 21 ps-1 @ 90% CL Most probable value of Dms = 19 ps-1 hep-ex/0603029
The Standard Model still in good shape.
Bs Ds- p+ Distribution of unmixed sample after 1 year (2 fb–1), ~80k events Bs oscillations @ LHCb • One of the first LHCb physics goals • important measurement • aiming for 5σ observation for Dms < 68 ps-1 [in one year] • LHCb could exclude full SM range • Once observed, precise value is obtained:sstat(Dms) ~ 0.01 ps-1 in one year of data taking[D0: sstat(Dms) ~ 1 ps-1 ] Tomáš Laštovička (CERN)
S.Roth D.Whiteson Precision measurements!! top mass + W mass => SM Higgs mass 10
Direct search for the SM Higgs at Tevatron P.Jonsson SM
Direct search for SM Higgs at LHC C.Delaere ATLAS CMS Discovery if 153 <MH<178 GeV
Measuring Higgs properties @ LHC H.Prysiezniak Mass 0.1%-1% precision over whole mass range Spin-CP can be ruled out J=1 for mH>230 GeV/c2 - 100 fb -1 and for mH=200 GeV/c2 - 300 fb -1. (J,CP)=(0,-1) for mH200 GeV/c2 - <100fb-1. Couplings (depending on assumptions) 10%-45% precision on g2Z, g2W, g2, g2t and 10%-50% on H for 110<mH>190 GeV/c2 and 300 fb-1 Self-coupling ΔλHHH=(λ-λSM)/λSM.= -1 excluded with at least 95%CL with 300 fb-1, λ determined to -60% to +200%.
Single top production Tevatron by A.Gresele LHC Study by M.M.Najafabadi
W polarization in top decay Tevatron result by J.Leveque LHC study by F.Hubault WR fraction
M.Neubauer Diboson production NLO predicts 12.4+-0.8 pb CDF 825 pb-1
Inclusive jet cross section at Tevatron A.Messina Good agreement with NLO pQCD. 21
Direct photon production at Tevatron M.Wobisch NNLO CDF Diphoton 207pb-1 agree with NLO within 7% |y|<0.9 L = 326 pb-1 pTg (GeV)
M.Shapkin Two-photon physics at LEP 3times larger than QCD prediction.
Search for non-SM Higgs at Tevatron A.Safonov Neutral MSSM Higgs to
Direct search for squark and gluino E.Lytken Generic squarks and gluinos strongly produced Cross section @ Tevatron: ~ a few pb Expect cascade decays Signature: Large Missing ET and 2 jets • Results from D0: (310 pb-1) 2, 3, or 4 jets CDF: (250 pb-1) 3 jets • Dominant backgrounds • Z+jets, W+jets, tt, QCD • QCD fitted or cross checked with data • MET cut > [75;175] GeV • Both experiments see no hints of SUSY
Purely leptonic decays of Bs,d mesons R.Brenhard
A.Gupta SUSY search at LHC 30
Beyond-SUSY at Tevatron P.Gris CDF
Heavy Spin-2 Object Search at LHC V.Litvin
The Status of the Structure Functions and Parton Density Functions
PDF from H1/ZEUS N. Raičeviċ _ F2em(x,Q2) ~ Σq eq2(q + q) HERA I • Still large uncertainties on gluon • density and on d density at large x Q2 / GeV2
Spin-dependent PDF from HERMES A.Hillenbrand
The Status of Quark model & non-pQCD
R.Chistov/Belle X(3872) JPC=1++ N= 13.64.4, 4.0 X(3940)->DD*
S.Gowdy/BABAR T.Ferguson/CLEO Hybrid (qqbar+g) ? 11 5.1 3.7
Results from BES at Beijing e+e- Collider X.U.Zhuang X(1835) J.Chen Substantial non-DDbar decay of by inclusive measurements. BR~14%-16% 40
S.W.Lin / Belle Baryonic B decays Large branching fraction!
Pentaquark saga continues. N.Coppola charmed pentaquark
P.Patteri / BABAR Two Virtual Photon Annihilation
A.Denig /KLOE NEW 2.7 deviation