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.

CP violation in the B sector

• This is a busy area, only a few things will be discussed

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

Cosmic Rays

• Highest energies – Auger detector

• Atmospheric neutrinos and Super K

1 particle/km2/century

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%

Lots more stuff of course

• The end