Belle results relevant to LHC

Pheno-07 May 8, 2007 Madison Wisc.

S.L. OlsenU of Hawai’i

CKM Global Fit (Sep.2006)

CKM is “correct” at tree level

B0

B0B0

Vcb

VtbV*

V*Vtb

J/

J/

KS

KS

sin21 from BfCP + BBfCP interf.

V*2

td

td

td

Sanda, Bigi & Carter:

Next step: use bs penguinsExample:

no KM phase

SM: sin21 = sin21 from BJ/ KS (bc c s)

unless there are other, non-SM particles in the loop

eff

Vtd

Vtd

+

1

B B

, ’,

1

, ’,

_

*

*

)(NP

top

M

MO

SM NP?

)(or )( of effectsExpect 2

2

NP

top

NP

top

M

MO

M

MO

i.e. > 0.1 for MNP accessible @ LHC~

~ s~

x

b

g~

t

2006: 1 with b s PenguinsSmaller than bccs in all of 9 modes

Smaller than bccs in all of 9 modes

Theory tends to predict positive shifts(originating from phase in Vts)

Naïve average of all b s modes

sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree (b s) (b c)

Naïve average of all b s modes

sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree (b s) (b c)

History of sin21

sin21 from bccs decays (2007)

2002

2003

2004

2005

2006

2.6

3.1

3.9

2.8

2.6

0.15

eff

sin

2 1

(b

qq

s d

ecays)

(Belle&

BaB

ar

avera

ge)

~ s~

x

How to make small?

•Tune the squark mixing terms•is there enough freedom to do this?

•Make the squark masses degenerate•invoke a GIM-like mechanism

•Make the SUSY mass scale very high (~few TeV)•not much fun for LHC experimenters

b

g~

B

Decays w/ “Missing E(>1)”Decays w/ “Missing E(>1)”

B decay constant Lattice QCD

SM :

BSM : sensitive to New Physics from H

B (nearly invisible decays)

N= 680keff.= 0.29% purity = 57%

N= 680keff.= 0.29% purity = 57%

Charged B

(*)0 (*)1/ / / SB D a D

0 0 0/D D sD

Tag-side: Full reconstruction

449M BB

Υ(4S)e (8GeV)

e+(3.5GeV)

B

B

signal signal

4-momentum determined B meson beam !

4-momentum determined B meson beam !

Missingmomentum

Missingmomentum

B candidate event

B results

Belle Hadronic tag

eeff

D l tage

First evidence, 3.5

No clear signal

Belle BaBarPRL97, 251802 (2006). hep-ex/0608019

We measure

Branching fraction

Product of B meson decay constant ƒB and CKM element |Vub |

Compare with

Babar preliminary

Constraints on H mass

rH=1.130.51

Use known fB and |Vub |

Ratio to the SM BF.2

22

(1 tan )BH

H

mr

m

excluded

excl

uded

BXs

W+, H+

Nakao

NNLO calculation

(29826) x 10-6

M. Misiak et al, hep-ph/0609232, PRL 98,022002(2007)

Theory News

NN

LO

th

eory

Error on BF

Central value of BF

95% CL lower limit on H+ mass from exp and NNLO

M. Misiak et al, hep-ph/0609232, PRL 98,022002 (2007)

BaBar/Belle/CLEO avg M(H+)>295 GeV

300 GeV

BBXs

350- Look here

or

here

Validate the EECL simulation using double-taggedevents (with on the signal side) Signal reconstruction (purity ~

90%)Extra Calorimeter Energy

MC: B+B–: 494 ± 18 B0B0: 8 ± 2 Combined: 502 ±18

Data: 458

_