Report on ICHEP06 Moscow, Russian Federation
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Transcript of Report on ICHEP06 Moscow, Russian Federation
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.
Kobayashi-Maskawa PhaseKobayashi-Maskawa Phase
CP violation parameters(1, 2, 3) = (, , )CP violation parameters
(1, 2, 3) = (, , )
~ 0.22CP violation is due to a complex phase
in quark mixing matrixCP violation is due to a complex phase
in quark mixing matrix
_
d
b_ c
c
sd
_wB0J/
K0
sin2sin211 measurement measurement
V*td
V*td_ _
t
dt
b
b
d _ww B0B0
_
B0
B0
qp
fCP
=A CP
(t ; B0J/K0) (t ; B0J/K0)
(t ; B0J/K0) (t ; B0J/K0)
_
_
= -cpsin21 sin(mt) + A cos (mt) Mixing induced CPV Direct CPV (A = C)
CP : CP eigenvalue, +1 (-1) for CP even (odd)
A=0
= 0.425 (Belle) 0.56 (BaBar)
Principle of TCPV measurementPrinciple of TCPV measurement
t z c
CP-side
Flavor tag and vertex reconstructi
on
Flavor tag and vertex reconstructi
on
1. Fully reconstruct one B-meson which decays to CP eigenstate2. Tag-side determines its flavor3. Proper time (t) is measured from decay-vertex difference (z)
electron(8GeV)
positron(3.5GeV)
(4S)resonance B1
B2
+-
K+
-0
D
+
-
KS/L
J/
z ~ 200m(Belle)
B0
B0_
B0 J/ KS B0 J/ KL
CP odd :CP=-1 CP even :CP=+1
B0 tag_B0 tag
B0 tag_B0 tag
0 0
SigSig+BG
sin21= +0.643 ±0.038 A = - 0.001 ±0.028
sin21= +0.641 ±0.057 A = +0.045 ±0.033
stat error stat error
Belle preliminary
Constraint on the Unitarity TriangleConstraint on the Unitarity Triangle
1=20o
1=70o
?
?
(^_^)
1 = 20.0o ± 1.3o
(Belle data only)
Time-dependent Dalitz analysisof B0 D[ KS ]h0
hep-ex/0605023 submitted to PRL
Disfavored at98.3% C.L.
_
The unitarity triangle: a year ago
Already many observablequantities are over-constrainingthe unitarity triangle.
Electroweak Sector
• Here again only a few topics
• Charged currents at HERA
• Top mass
• Single top production
p + γ 2.7 K → N+ π
Above Ethr ≈ 7*1019 eV, protons loose rapidly energy via pion photoproduction. Interaction length ≈ 6 Mpc Energy loss ≈ 20 % / interaction
Auger hybrid detector 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 !
Surface Detector (SD)
• Front of shower at ground
• Direction of the shower
• “High” statistics
50 km
Total area ~3000 km2
1600 Surface detectors (“water tanks”)
24 fluorescence telescopes 6 in each of 4 buildings
The Auger Observatory
About ¾ installed and operational
Completion in 2007
Statistics is now about ½ year of full Observatory (~7000 km2 sr yr) Efficiency =100% above 3 EeV
Systematic error onthe energy ±~ 25%