Report on ICHEP06 Moscow, Russian Federation

48
Report on ICHEP06 Moscow, Russian Federation Lee Pondrom, UW Madison, 25 Sept 2006

description

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. - PowerPoint PPT Presentation

Transcript of 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