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Summary of BNM1 and Goals of BNM2 M. Hazumi (KEK) BNM1 workshop BNM = B factories and New Measurements Sep.13-14, 2006 at KEK http://www-conf.kek.jp/bnm/2006/ 100 participants 49 talks ! Many new ideas proposed ! This workshop (BNM2) is a follow-up of BNM1. 50ab-1 SuperB 1ab-1  s

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bnm1 workshop
BNM1 workshop
  • BNM = B factories and New Measurements
  • Sep.13-14, 2006 at KEK
  • http://www-conf.kek.jp/bnm/2006/
  • 100 participants
  • 49 talks !
  • Many new ideas proposed !

This workshop (BNM2) is a

follow-up of BNM1.

new ideas in 3 1 dimensions

50ab-1

SuperB

1ab-1

s

U(4s)

New ideas in 3+1 dimensions

4th dimension = theory

Integrated

Luminosity

Detector

performance

We are here.

U(3s)

U(5s)

luminosity budget at belle
Luminosity Budget at Belle

as of Summer 2006

U(3S) ~ 3/fb

U(5S) ~ 24/fb

Off-resonance ~ 60/fb

U(4S) ~532/fb

Your new ideas will change the budget in the future

(at Belle and a Super B factory).

topics at bnm1
Topics at BNM1
  • Upsilon(5S) and other energies
  • New Detectors
  • New ideas on Upsilon(4S)
  • Physics at Super B factories
1 upsilon 5s and other energies
1) Upsilon(5S) and other energies
  • Bs physics with 100-500/fb on Upsilon(5S) (A.Drutskoy)
    • Advantages: good g rec., high trigger eff., modes with n accessible
    • Observation of Bs ggg, fg: sensitive to new physics
    • Measurement of DG (before LHCb) with Bs g Ds(*)Ds(*)
    • Why don’t we consider Lb, Bc, Xb (CM energy up to ~ 14 GeV) ?
  • Bs physics with 1-30/ab (M.Pierini)
    • Simulation studies for Bs g mm, J/f
    • Simulation studies for ASL, f3 with Bs g Kpp0, Vts/Vtd with Bs gfg, K*g

photons

neutrinos

Advantages at e+e- B factory

upsilon 1s 2s 3s
Upsilon(1S,2S,3S)
  • Light dark matter (LDM) (B. McElrath)
    • Upsilon gcc (c: dark matter particle)
    • Motivation and search methods discussed
    • e+e- B factory is the best place to search for LDM with mass < mb
  • Best choice for LDM is Upsilon(3S) (O. Tajima)
    • e+e- g Upsilon(3S) gp+p-Upsilon(1S), Upsilon(1S) gcc (invisible)
    • Belle’s engineering run on 3S and prospects shown
  • Very light (MeV) dark matter (D. Choudhury)
    • Motivated by unexpectedly large 511keV g from galactic center
    • e+e- g Ug (U: spin-1 boson coupling to both e+e- and cc)
  • Test of lepton universality (M. Sanchis-Lozano)
    • ratios of branching ratios for Upsilon gee, mm, tt at a few % level
    • Enhanced Upsilon gttg in some new physics models (e.g. NMSSM) results in larger Upsilon gtt branching fraction (due to soft photons)
    • Complementary to LDM search (if LDM from NMSSM)
  • CP violation in Upsilon decay, and some thoughs on Upsilon g DD (H. Li)
slide11

O. Tajima

90 %C.L. limit

by McElrath

SM : Y(1S)nnbar

ToyMC 10fb-1

O(1)/fb data sufficient to obtain interesting results

proposal of testing lepton universality to the percent level at a super b factory
Proposal of testing lepton universality (to the percent level) at a (Super) B factory

Data used in the CLEO analysis consisted of on resonance samples of 1.1 fb-1, 1.2 fb-1 and 1.2 fb-1

for the (1S), (2S) and (3S) amounting to about 20 M, 10 M and 5 M decays, respectively

together with off-resonances samples of 0.2, 0.4 and 0.2 fb-1

For direct leptonic(3S) decays:

In order to get a similar statistical error ( 8%) for the ratioR/

one should naively require the same integrated luminosity of 1.2 fb-1, i.e.

1 day of data taking at 1034 cm-2s-1 (as a reference value)

To get a statistical errorof1%

few days at 1034 cm-2s-1

With respect to thedecay chain(3S)  π + π - (1S,2S) → l +l -

despite a smaller combined BF an integrated luminosity of several fb-1

requiringseveral days of data taking at a B-factory sitting on the (3S)

should be enough fortesting lepton universality to the few %level

Similarly (or much better) for a Super B-factory running on the (4S) / (3S)

M. Sanchis-Rosano

1 s k s k s could be reached at future super b factory
(1S)  KSKS could be reached at future Super-B factory?
  • The design luminosity of super-KEKB: 81035 cm-2s-1
  • The observed cross section of Y(1S) ( CLEO): 21.5nb
  • With one year running at super-KEKB: 1011 Y(1S) events/year
  • The current limit: BR((1S)K+K-)< 5 10-4 @90% C.L.
  • while the theoretical prediction: BR((1S)K+K-)  610-6 ,
  • Assuming BR((1S)K+K-) = BR((1S)KSKL), one get:
  • BR(Y(1S) KSKS)  6.4 10-11 tiny!
  • Unfortunately, it is very hard to probe the CP violated processes
  • in Y(1S)K0K0bar decays!
  • Anyway, one has to search for (1S)KSKL /K+K- firstly.

H. Li

summary 2
Summary (2)

Very Preliminary

The Branching fraction of Y(1S)D0D0bar could be as large as 10-4,

The number of D0D0bar @super-KEKB/year may be the same as those at BESIII

with one year running. But we can use both time and coherent information to

extract mixing and CP parameters. It is very interesting to make a quick

measurements of the following processes:

C=-1 , coherent production

Incoherent production

(background)

Coherent and Time-Dependent Analysis!

Toy MC study in progress.

H. Li

homework
Homework
  • One good figure to show constraints on DM
    • include all DM searches
  • Experimental considerations on MeV DM, lepton universality tests
  • Other topics not yet discussed
    • epsilon_b search
    • Measurement of as
    • LFV in Upsilon decays
      • (provocative statement): SuperB can give us 1012 Upsilon(1S). Why don’t we think about Upsilon(1S) gmt for example ?
2 new detectors
2) New Detectors
  • TOP counter (K. Inami)
  • APDs for Aerogel RICH (Y. Mazuka)
  • PID in the forward region (S. Korpar)
  • Electromagnetic calorimeter upgrade (A. Kuzmin)
  • Speculation
    • Super-flat beampipe (N. Katayama)
      • Bs mixing meas. may be possible !?
      • Great continuum rejection
    • Very forward detector (M. Hazumi)
      • Improvement in full-reconstruction physics
      • Improvement in light DM search and similar searches
top counter summary
TOP counter Summary

K. Inami

  • Square-shape MCP-PMT with GaAsP
    • Developing prototypes with HPK
    • Enough gain and TTS (~35ps)
    • Lifetime test has started.
      • Multi-alkali photo-cathode MCP-PMT: O.K.
  • Focusing system
    • >4.3s separation for 4 GeV/c
    • Test mirror performance
      • Checking accuracy

Focusing mirror

a novel photo sensor of silicon apds
A novel photo sensor of silicon APDs

Y. Mazuka

  • 100~2000 pixels / typical size ~1mm2
  • each pixel = independent silicon APD
  • Operated in Geiger mode
  • Number of fired pixels = Number of photons
  • Photon Detection Efficiency (PDE)
  • There are MRS-APD, SiPM, MPPC, etc

Measured sample

: Geometrical efficiency

: Probability of Geiger discharge

3 new ideas on upsilon 4s
3) New Ideas on Upsilon(4S)
  • photon conversion
    • Sp0p0 (Ishino, Yoshikawa)
      • 8-fold ambiguity  2-fold
      • DI=5/2 detected; important to distinguish b/w new physics and rescattering within SM
    • K*g (Nakao)
      • New access to right-handed current amplitude
  • B+gfK+g angular analysis (Soni)
      • Access to CP-violating phase in right-handed b g sg
      • Tiny SM pollution (had. uncertainty ~ ms/mb*l2
  • T-odd asymmetry in B  Lpp (Geng)
      • either T-odd asym. or direct CPV is sizable
4 physics at super b factories summary of superkekb sensitivity studies what s new updated missing

4) Physics at Super B factoriesSummary of SuperKEKB sensitivity studiesWhat’s new, updated, missing ?

Int. Lumi (ab-1)

0 5 10 20 30 40 50

RK 0.07 0.02

gray: no update from SuperKEKB LoI

A10 13% 4%

skyblue: updated from SuperKEKB LoI

bgdg 7.5s

yellow: New !

red circle: first observation !

explanatory note

full reconstruction modes

Int. Lumi (ab-1)

Full reconstruction modes

0 5 10 20 30 40 50

Btn 5s 10% 3%

M(H+)>400GeV (2s)

at tanb = 30

similar sensitivity from B  Dtn

Bmn [email protected] with present central value

[email protected] with SM expectation

BK+nn [email protected]

Very important progress on these clean modes !

Need to work on B  K*nn, Ksnn

Need to work on Bd  m+m-, e+e-

b s d precision

Int. Lumi (ab-1)

b  s/d precision

0 5 10 20 30 40 50

RK 0.07 0.02

ACP(bgsg) 0.01 0.005

A9 11% 4%

A10 13% 4%

bgdg 7.5s

S(Ksp0g) 0.1 0.03

S(r0g) 0.3 0.1

AR w/ gpol 3s if AR~AL

S(KsKsKs) 0.105 0.037

S(fK0) 0.073 0.029

S(h’K0) 0.038 0.020

DA(Ksp0) 0.072 0.050

error on d s at super kekb

K. Hara

Error on DS at Super KEKB

DS errors @5ab-1 @50ab-1

KsKsKs 0.105 0.037

fK0 0.073 0.029

h’K0 0.038 0.020

3 mode

combined 0.035 0.019

ckm fit

Int. Lumi (ab-1)

CKM fit

0 5 10 20 30 40 50

f1 0.016 0.012

f2 2deg.

f3 2deg.

Vub(inclsv) 6.6% 6.1%

Vub(exclsv) ~12% ~5%

slide29

K.F.Chen

And many other sensitivity numbers  how to use them for new physics studies ?

tau lfv processes

Y. Okada

Tau LFV processes

Tau LFV vs. mu LFV, Which is important?

and their CP conjugates

“Polarized” tau decay

R.Kitano and Y.O. 2001

Angular correlation => polarized tau decay

Muon polarization in t->3m, A.Matsuzaki

tau lfv examples

E6 GUT with U(2) like flavor symmetry

Left-Right symmetric model

with low energy seesaw.

N.Maekawa, K.Sakurai

B(t->mg)~10-8, B(m->eg)~10-11

M.Aoki

t -->m-R g

B(t->mll) ~10-8 possible

(In other cases, B(m->3e) or

B(m->eg) is more important.)

SU(5) GUT with seesaw neutrino

T.Goto

B(t->mg)~10-8 possible

(In other cases, B(m->eg) is more

important.)

t -->m-L g

Tau LFV examples

Different features about relationship between tau and mu LFV

processes and asymmetries

future prospect for t lfv

K. Inami

Future prospect for t LFV

PDG2006

Belle

Babar

  • Possible sensitivity at 5ab-1

based on eff.

and NBG of

most sensitive

analysis

Estimated

upper limit

range of Br

future prospect

K. Inami

Future prospect
  • Br~O(10-9) at Super B factory
physics impact

K. Inami

Physics impact
  • Physics reach for SUSY parameters
    • tmg
    • tmh
  • After observation!
    • To specify the model,
    • Angular correlation
    • Muon polarization, etc.
tau physics

n

t

n

t

W

H-

s

s

u

u

T.Morozumi

Tau physics

Direct CPV in t-->K-pn

CPV in forward-backward asymmetry

to do
To do
  • Finish sensitivity studies
  • start sensitivity studies for new modes
  • put them into a global picture

Revised “SuperKEKB physics book”

by the end of February 2007.

Publication in spring 2007 (physics reports).

general mixing framework
General Mixing Framework

K. Okumura

J. Park

susy gut models
SUSY GUT Models

T. Goto

N. Maekawa

major achievements expected at superkekb
Major Achievements Expected at SuperKEKB

Case 1: All Consistent with Kobayashi-Maskawa Theory

Search for New CP-Violating Phase in bgs with 1 degree precision

CKM Angle Measurements with 1 degree precision

Discovery of BgKnn

Discovery of Bgmn

Discovery of New Subatmic Particles

Discovery of T Violation in BgLpp

sin2qW with O(10-4) precision

|Vub| with 5% Precision

Observations with

U(5S), U(3S) etc.

Discovery of BgDtn

Discovery of CP Violation in Charged B Decays

“Discovery” with

sigfinicance > 5s

Discovery of Direct CP Violation in B0gKp Decays (2005)

Discovery of CP Violation in Neutral B Meson System (2001)

major achievements expected at superkekb40
Major Achievements Expected at SuperKEKB

Case 1: All Consistent with Kobayashi-Maskawa Theory

Case 2: New Physics with Extended Flavor Structure

Search for New CP-Violating Phase in bgs with 1 degree precision

Discovery of Lepton Flavor Violation intgmgDecays#

CKM Angle Measurements with 1 degree precision

Discovery of BgKnn

Discovery of Bgmn

Discovery of New Right-Handed Current in bgs Transitions #

Discovery of New Subatmic Particles

Discovery of T Violation in BgLpp

Discovery of New CP Violation

inB0gfK0Decays#

sin2qW with O(10-4) precision

|Vub| with 5% Precision

Observations with

U(5S), U(3S) etc.

Discovery of BgDtn

Discovery of CP Violation in Charged B Decays

“Discovery” with

sigfinicance > 5s

Discovery of Direct CP Violation in B0gKp Decays (2005)

# SUSY GUT with

gluino mass = 600GeV,

tanb = 30

Discovery of CP Violation in Neutral B Meson System (2001)

comparison of super b and lhcb
Comparison of Super-B and LHCb

No other experiment can compete for

New Physics reach in the quark sector.

SuperKEKB

5ab-1

50ab-1

LHCb 2fb-1

slide42

Beyond the SM

New CP violation,

Lepton Number Violation

Can be discovered anytime

Big question of quark flavor physics 1)

What does the flavor structure of TeV new physics look like ? (How does it taste ?)

Experiment-driven

slide43

Is there flavor symmetry yet to be discovered ?

The number of free parameters < 10

 relation between CKM and masses !!

slide44

Big question of quark flavor physics 1)

What does the flavor structure of TeV new physics look like ? (How does it taste ?)

Subquestions

1-1) Are there new CP-violating phases ?

1-2) Are there new right-handed currents ?

1-3) Are there effects from new Higgs fields ?

1-4) Are there new flavor violation ?

1-1) tCPV in B0gfK0, h’K0, KsKsKs

1-2) (t)CPV in b g sg

1-3) B gtn, mn, Dtn

1-4) tgmg

Big question of quark flavor physics 2)

Is there flavor symmetry yet to be discovered ?

Unitarity triangle with 1% precision

goals of bnm2
Goals of BNM2
  • Answers to questions/homework at BNM1
  • Wrap-up reports on SuperKEKB physics
    • Close-to-the-final figures, numbers for physics book
  • Present further new ideas
  • Further brain-storming
  • Enjoy our stay in Nara !
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