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Report on ICHEP06 Moscow, Russian Federation

Report on ICHEP06 Moscow, Russian Federation. Lee Pondrom, UW Madison, 25 Sept 2006. Possible new c-cbar states. Several new resonances have been seen at the B factories-daughters of B decays One prominent signature is X-> J/ ψ  The X(3872) has been confirmed at the Tevatron.

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Report on ICHEP06 Moscow, Russian Federation

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  1. Report on ICHEP06 Moscow, Russian Federation Lee Pondrom, UW Madison, 25 Sept 2006

  2. Possible new c-cbar states • Several new resonances have been seen at the B factories-daughters of B decays • One prominent signature is X->J/ψ • The X(3872) has been confirmed at the Tevatron.

  3. CP violation in the B sector • This is a busy area, only a few things will be discussed

  4. Kobayashi-Maskawa Phase l ~ 0.22 CP violation is due to a complex phase in quark mixing matrix CP violation parameters (f1, f2, f3) = (b, a, g )

  5. B0 _ fCP _ _ _ c q p _ J/y _ d b b B0 c t w B0 B0 _ B0 w w t s b d d K0 d _ G(Dt ; B0J/yK0) -G(Dt ; B0J/yK0) = _ A G(Dt ; B0J/yK0) +G(Dt ; B0J/yK0) CP = -xcpsin2f1 sin(DmDt) + A cos (DmDt) Direct CPV (A = -C) Mixing induced CPV xCP: CP eigenvalue, +1 (-1) for CP even (odd) sin2f1 measurement V*td V*td A=0

  6. _ B0 Principle of TCPV measurement CP-side m+ J/y m- (4S) resonance B1 electron (8GeV) KS/L B0 positron (3.5GeV) nm B2 p- bg = 0.425 (Belle) 0.56 (BaBar) K+ p- Flavor tag and vertex reconstruction Dz ~ 200mm (Belle) m+ • Fully reconstruct one B-meson which decays to CP eigenstate • Tag-side determines its flavor • Proper time (Dt) is measured from decay-vertex difference (Dz)

  7. Belle preliminary Sig Sig+BG _ _ B0 tag B0 tag Belle preliminary B0J/y KS , KL B0 J/y KS 0 B0 J/y KL 0 B0 tag B0 tag CP odd : xCP=-1 CP even : xCP=+1 sin2f1= +0.643 ±0.038 A = - 0.001 ±0.028 sin2f1= +0.641 ±0.057 A = +0.045 ±0.033 stat error stat error

  8. Constraint on the Unitarity Triangle _ Time-dependent Dalitz analysisof B0  D[ KSp+p- ]h0 hep-ex/0605023 submitted to PRL ? f1=70o f1=20o Disfavored at 98.3% C.L. ? (^_^) f1= 20.0o± 1.3o (Belle data only)

  9. The unitarity triangle: a year ago Already many observable quantities are over-constraining the unitarity triangle.

  10. Electroweak Sector • Here again only a few topics • Charged currents at HERA • Top mass • Single top production

  11. Cosmic Rays • Highest energies – Auger detector • Atmospheric neutrinos and Super K

  12. 1 particle/km2/century

  13. Above Ethr ≈ 7*1019 eV, protons loose rapidly energy via pion photoproduction. Interaction length ≈ 6 Mpc Energy loss ≈ 20 % / interaction p + γ 2.7 K → N+ π

  14. Fluorescence Detector (FD) • Longitudinal development of the shower • Calorimetric measurement of the energy • Calibration of the energy scale • Direction of the shower • 12% duty cycle ! Auger hybrid detector • Surface Detector (SD) • Front of shower at ground • Direction of the shower • “High” statistics

  15. The Auger Observatory Total area ~3000 km2 1600 Surface detectors (“water tanks”) 24 fluorescence telescopes 6 in each of 4 buildings About ¾ installed and operational Completion in 2007 50 km

  16. Statistics is now about ½ year of full Observatory (~7000 km2 sr yr) Efficiency =100% above 3 EeV Systematic error on the energy ±~ 25%

  17. Lots more stuff of course • The end

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