FPCP Experimental Summary

1
FPCP Experimental Summary
Tom Browder (University of Hawaii)
Experimental Techniques Hadrons and Hadronic
Decays Measurements of CKM sides CP Violation
Rare Decays The Future.
2
Developments in accelerator physics and detector
technology make progress in flavor physics and CP
violation possible.
Two especially notable ones with a profound
impact at FPCP03 B-factory storage rings have
integrated over 100 fb-1 (KEKB achieved Lgt1 x
1034/cm2/sec) CDF detached vertex trigger allows
selection of hadronic BD decay modes (coming for
D0) Blocker, Shapiro, Martin, Boca, Jain
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KEKB (8 x 3.5 GeV, 11 mrad X angle)
PEPII (9 x 3.0 GeV, magnetic sep.)
KEKB Collider
150 fb-1/ 78 fb-1 used so far
125 fb-1/ 81 fb-1 used so far
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L(1.05 x 1034)/cm2/sec
Int(L dt) 0.149 ab-1
New Daily Record May 13 595 pb-1/24 hr
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Hadronic B Decays at CDF
B?h h-
Bd ? ??
Bd ? K?
Disentangle
Bs ? KK
Bs ? K?
with kinematics dE/dx
B? ? f K?

Bd?p p- 3914 Bd?K- p 14817 Bs?K p-
311 Bs?K K- 9017
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Bs Mesons and ?b Baryons (CDF vertex trigger)
Bs ? Ds?, Ds ? ?? golden mode for Bs
oscillations
Lb ? Lc p
p K p
N(Ds) 56 15
N(Ds) 42 8
But 103 events required for a competitive Bs
mixing meas !
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Selected Topics in Brown Muck
N.Isgur
(Le Romantisme de la Boue)
New Charm Mesons (DsJ and all that)
Hot topics by Barlow, Stone, Shapiro Chistov,
Trabelsi
Mystery of ee- ? J/? (c cbar) production
Hot topic Bondar
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New Ds () po Resonances (A. Palano et al.)
Le hasard favorise lesprit prepare
Dspo

• Narrow state, mass
• 2316.80.43.0 MeV

Dm 349.81.3 MeV
CLEO
Dspo

BABAR
BABAR
Ds
New
Chance favors the prepared mind-L.Pasteur
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Belle Confirms Both States
64350
M(2457.81.4) MeV s(7.0 1.7) MeV
7918
M(2317.40.5) MeV s(8.1 0.5) MeV
M(Ds p0 )
M(Ds p0 )
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Interpretation
What are these new states a DK molecule or a
4-quark state ? e.g. Barnes, Close and Lipkin,
hep-ph/0305025 Ordinary excited p-wave c-sbar
states Ds ?
Ds predicted Jp 0, 1, 1 2. Two narrow 1
2 found long ago by ARGUS and CLEO. Others
predicted to be above DK threshold and have large
200 MeV widths, but this state is far below DK
threshold.
The Ds po decay from an initial c-sbar state
violates isospin, this suppresses the decay width
and makes it narrow. Thus, the low mass ensures
the narrow width.
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Belle
Using B?D Ds()p0 (?) to find new Ds
resonances
D Dsp0
D Ds?
D Dsp0
Belle also a continuum signal for Ds(2460)?Ds ?
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Search for orbitally excited Ds mesons in B
decay
Babar
Babar
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Using B- ?D p- p- to find broad D resonances.
Belle
tensor
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Using B- ?D p- p- to find broad D resonances.
Belle
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More twists or the end of the Ds () p0 tale ?
Ds(2460)?Ds ? observed by Belle. This establishes
that this is a 1 state.
Belle finds that Ds(2420), Ds(2460)jl1/2
produced abundantly in B decay, while the other
jl3/2 states are not.
But the masses are unexpected the new Ds 0
and 1 states have nearly the same masses as the
D 0 and 1 states.
c.f. Baarden, Eichten, Hill
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G. Bodwin, J. Lee and E. Braaten (PRL 2003)
suggest 2-? processes may explain apparent large
and anomalous e e-?? (c cbar) signal seen at
Belle.
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Belle Data vs Braaten et al.
No evidence for e e- ?2-? ?J/? J/?.
Still have severe disagreement with NRQCD

Cross section s(e e- ? J/? J/? )(J/? J/??2
charged)lt 8 fb
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Updated signals for e e- ? ? D X
Belle

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CKM Matrix Elements Length of the sides of the
UT (will concentrate on Vub)
Vcb
Calvi

F(1)Vcb(38.8?0.5stat?0.9syst)x10-3 rA2
1.54?0.05stat?0.13syst
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Inclusive semileptonic B Decay
The hottest topic of the conference ! Artuso,
Ligeti, Uraltsev
Vcb
ltMx2-mD2gt(GeV2)
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Approaches to Vub
CLEO b?s ? data
endpoint
MX and q2
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Vub using reconstructed tags(Babar)

• Use fully reconstructed B tags

• Vub(4.52?0.31(stat)?0.27(sys)
• ?0.40(thy)?0.09(pert)
• ?0.27(1/mb3)) x10-3
• Preliminary

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Vub(3.960.17(stat)0.44(sys)0.34(b?c)0.26(b?
u)0.29(theor)) x 10-3
MX and q2 spectrum from Belle advanced
neutrino recon
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Inclusive Vub with D() l ? tagging (Belle)
MX
Vub(3.960.17(stat)0.44(sys)0.34(b?c) 0.26(b
?u)0.29(theor)) x 10-3
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Summary of Vub (inclusive) from HFAG
Ed Thorndike Systematic errors always dominate.
No final average
(Many are theoretical)
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See talk by Ligeti
Luke et al Usually more phase space is better.
Counterintuitive, cut out low MX and low q2 where
perturbation theory diverges.
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• Representative cuts
• (a) q2gt6 GeV2, mXltmD 46 of rate
• (b) q2gt8 GeV2, mXlt1.7 GeV 33 of rate
• (c) q2gt11 GeV2, mXlt 1.5 GeV 18 of rate

M.Luke
Uncertainty Size (in Vub) Improvement?
Dmb ?80 MeV RG improved sum rules, moments
of B decay 7, 8, 10 spectra, lattice
?30 MeV 3, 3, 4 as 2,
3, 7 full two-loop calculation 1/mb3 3,
4, 8 compare B?, B0 (weak annihilation) compar
e S.L. width of D0 , DS, lattice
See talk by Ligeti
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Vub (exclusive) B?pln, B?rln
CLEO
CLEO

• Use detector hermeticity to reconstruct n
• CLEO finds rough q2 distribution

B(Bo?p-ln )(1.33?0.18stat ?0.11exp ?0.01
ff,sig ? 0.07 ff,cf)x10-4
B(B0?r-ln )(2.17?0.34stat sys ?0.41
ff,sig ? 0.01 ff,cf)x10-4
0.47 -0.54
While Babar finds
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I invented ? and ? and I dont care what their
values are, so why should you ?? The physics here
is to determine if the breadth of CPV phenomena
are really described by this simple description.

Toshide Maskawa
Makoto Kobayashi
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CP Violation and Rare Decays
The angles f1(ß), f2(a), prospects for f3 (?) and
other forms of CPV Lacker, Ford, Sagawa,
Golutvin, Bocacharm, Johncharm, Sozzikaons
Rare Hadronic Decays Bona, Aihara
Radiative and Electroweak Penguins Di Lodovico,
Ishikawa, Artuso.
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Notational Conventions
Three Angles (f1,f2,f3) or (ß, a, ?)
Birthname Matsui Nickname Godzilla
f1 b f2
a f3 g
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Belle and Babar measurements of sin(2f1)
CP-1
CP-1
CP1
CP1
hep-ex/020825, PRD 66,071102 (2002)
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Status/history of results for sin(2f1)sin(2ß)
Belle 2001 sin(2f1) 0.990.140.06
Babar 2001 sin(2f1) 0.590.140.05
First signals for CPV outside of the kaon sector.
Belle 78 fb-1 sin(2f1) 0.7190.0740.035
Babar 81 fb-1 sin(2f1) 0.7410.0670.033
Now becoming a precision measurement
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Current Belle and BaBar Results for sin(2f1)
sin2f1 (Belle) 0.7190.0740.035
sin2f1 (BaBar) 0.7410.0670.033
sin2f1 (World Av.) 0.7340.055
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Vub
Vus
From H. Lacker
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B?p p- CPV CONTROVERSY
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Data Belle (78 fb-1) versus Babar (81 fb-1 )
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Comparison of Belle and BaBar (Spp ,App )
rP/T strong phase difference
World Average
S-0.660.26
App
A 0.490.2
2.2 s difference
Spp
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Comparison of Results on B?h h BFs
Hints relevant to f2 (a) extraction
Belle29 fb-1 (PRD, B.C.K Casey et al )?78 fb-1
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Ratios of B?h h Branching Fractions
Belle update
The deviation of G(p p-)/2 G(p p0) from unity
indicates either f3 gt900 or large FSI or a
large color suppressed contribution.
The bound G(p0p0 )/ 2 G(pp0) gives a weak limit
on f2eff - f2 lt510 at 90 C.L. (Babar UL)
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CP Violation in B0 ?rp decay
Final state is pp-p0 not a CP eigenstate Four
amplitudes contribute
?
?
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B0 ?rp Time-dependence
Decay rate distribution
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B0 ?rp/rK (BaBar)
Results based on 89 million BB pairs.
BR of rp and rK
B0 ?rp
B0 ?rK
Charge asymmetry of rp and rK
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B0 ?rp/rK (BaBar) Dt distributions
Bcontinuum background
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Direct CP violation in B0 ? rp ?
(0,0)
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Direct CPV in kaons Re(?/?) Results
?26.2/3
Final result (1997-2001)
Half statistics (1997)
Direct CP violation proved at gt7? levelafter
36 years!
Further results will come from KTeV and KLOE
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Large Direct CP Asymmetries for B Decay Modes ?
Hint from Belle (2.2 s level) of direct CP
violation in B0 ?p p- App 0.77 0.27 0.08
Hints from Babar in B?? p A-0.500.19 as
well as in B?? p- .
Belle anomaly (2.9 s) in the pure penguin mode B
?KS p at 29 fb-1 fluctuated away at 78 fb-1
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Summary of Direct CP violation in B Decays
1 exp Sensitivity 6
1 exp Sensitivity 11
Pure penguin
Flavor tag required
Pure tree
Theoretical Expectations 5-10 in QCD Fact or
pQCD
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Extraction of f3 (?)
Experimental observables
BF(B-?D1,2K-)
BF(B-?D1,2?-)
/
, A1 and A2
R1,2
BF(B-?D0K-)
BF(B-?D0?-)
/
allow, in principle, to extract RDK- , ? and ?
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Example of B?V V B?f K Angular Analysis
A02 0.430.090.04
Aperp 2 0.410.100.04
arg(Apar) -2.570.390.09
arg(Aperp) 0.480.320.06
Not a single CP eigenstate. No clear FSI signal.
Babar Observe B?K ?0 Belle Observe B??
?0 Babar Observe B?D0 K-
DattaLondonAT signatures of new physics in B?VV
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Extraction of ? (f3) B0?D0K()0 Mode
Two comparable color-suppressed amplitudes
Triangles are not as squashed as in B?? DK? case
_
_
1.3
BELLE
BF(B0? D0 K0) (5.0 ?0.6) ? 10-5
-1.2
_
_
1.1
BF(B0? D0 K0) (4.8 ?0.6) ? 10-5
-1.0
Hope to observe B0? D0 K0 decay Present Upper
Limit is BF(B0? D0 K0) ? 1.8 ? 10-5
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T-odd correlations in KL,S ? ????e?e?
A? (13.3 ? 1.7)
KTeV KL
NA48A? (14.2 ? 3.6)
1.5K events
BR (3.63 ? 0.18) ? 10-7
NA48 BR (3.08 ? 0.2) ? 10-7
BR (4.69 ? 0.30) ? 10-5
NA48 KS,KL
No asymmetryA? (?1.1 ? 4.1)
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BaBar reconstructed D1K-
KK-
(7.4?1.7?0.6)
R1
(8.31?0.35?0.20)
0.09
AD1K- 0.17?0.23
-0.07
D1K-and
D2K-
BELLE studied both
R1 1.21 ? 0.25 ? 0.14 R2 1.41 ? 0.27 ?
0.15 AD1K- 0.06 ? 0.19 ? 0.04 AD2K- -0.18 ?
0.17 ? 0.05
No constraints on ? possible with this statistics

Needed significantly higher statistics
precision measurements of D Branching
Fractions
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Dreams of New Physics and Other Adventures with
rare B decays.
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Hunting for phases from new physics
Example
In the SM, sin(2f1)eff sin(2f1) (B?? KS )
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Hunting for new phases in b?s penguins
(hep-ph/0209290), J-P Lee, K. Y. Lee (hep-
ph/0208226) B. Dutta, C.S. Kim and S. Oh
(hep-ph/0208091), M. Raidal (hep-ph/0208087), M.
Ciuchini, L. Silvestrini (hep-ph/0208016), A.
Datta(hep-ph/0208005), H. Murayama(
hep-ph/0207356), G. Hiller (hep-ph/0207070),
M-B. Causse (hep-ph/0208080) Y. Nir .
Belle
Belle sin2f1eff -0.73 0.64 0.22 Babar
sin2f1eff -0.180.51 0.09
WA sin2f1eff (f KS) -0.38 0.41
2.7s off
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Hunting for new phases in b?s penguins
B? ?KS
Large rates for exclusive and inclusive B?? Xs
decays.
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Mystery of Large Inclusive B?? Xs
gluon anomaly
0.7 -1.0
B?? Xs (6.8 1.0 0.5 )x 10-4
c.f. Babar hep-ex/0109034
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BaBar B?? Xs inclusive
QCD anomaly e.g D.Atwood and A.Soni, W.S. Hou
and Tseng A. Kagan CLEO ?(1S) data show that
the ? gg form factor is much too small. c.f.
AliParkhomenko, E. Kou
Babar
3-body
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N(hKS)14612
Search for New Physics in the B? ?KS penguin
decay.
0.05 -0.06
Belle S?Ks 0.710.37

Babar S?Ks 0.020.340.03
Belle
In the absence of New Physics, S?Ks sin (2f1)
(a.k.a. sin(2ß))
Current WA sin(2f1)0.7340.055
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Status of new phases in b?s penguins
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g Energy spectrum in B?Xsg

• Inclusive analyses need to boost g from LAB frame
  to B frame. Exclusive analyses from MXs ? Eg in B
  frame

CLEO
2GeV
(B reference system)
2.1 GeV
(LAB reference system)
CLEO (PRL 87, 251807, 2001) Eg gt 2.0 GeV ltEggt
2.3460.0320.011 GeV ltEg2gt-ltEggt2 0.02260.00660
.0020 GeV2
BaBar (hep-ex/0207074) Eg gt 2.1
GeV ltEggt2.350.040.04 GeV
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B?Kg
B?K(892)g BELLE

• First observations of B?K(892)g and B?K2(1430)g
  by CLEO (1993 and 2000).
• Much higher statistics now. Results close to
  being systematics limited.
• Measurements of Branching Fractions, CP
  asymmetries and isospin asymmetry between B0 and
  B decay widths

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B(B?Kg) results
New
New
BELLE isospin asymmetry
rB(B0?K0g)-B(B?Kg) rt B/tB01.0830.017
rB(B0?K0g)B(B?Kg)
Isospin breaking (Kagan Neubert hep-ph/0110078)
can test Wilson coefficients (C6/C7)
New
D0
0.0030.0450.018
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The Hunt for the EW PenguinB?Xs l l-
Discovered by CLEO in 1994
As in b?s ?, heavy particles in the loops can be
replaced with NP particles (e.g.W ? H)
Note contributions from virtual ? , W, Z and
internal t quark.
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Belle 2002 Observation of inclusive B?Xs l l-
25.511.2
37.39.7
Control sample
1.3 -1.1
BF(B?Xs l l- ) (6.11.4 ) x 10-6
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Sensitivity to new physics in AFB (B?K l l-)
standard model
SUGRA models
MIA SUSY
Polar angle of lepton in dilepton rest frame.
q2
(GeV2)
A. Ali et al., PRD 61, 074024 (2000).
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(No Transcript)
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Sensitivity to new physics phases
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New Top Mass Measurements

• 33 candidates
• 8 events with a tagged b

CDF Run 1 combined Mtop 176.1 6.5 GeV/c2
Run I D0 leptonjets 173.3 5.6(stat)  5.5 (syst
) GeV/c2.
2-3 GeV for 2 fb-1
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Question Why look for new physics at a super
B-factory or LHCB/BTeV when you have the LHC that
produces new particles directly ?
Answer They are complementary LHC does masses,
B Factory does phases (and couplings).
Example Beautiful, sophisticated and precise
measurements of the top quark mass at the
Tevatron (Coca). However, the couplings Vts,
Vtd, and most importantly the phase of (Vtd)
cannot be measured in direct top production.
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The Future
Super/Upgraded e e- B Factories Yamauchi,
Giorgi
Hadronic B Experiments Honscheid, Matteuzi,
Ohlsson-Malek
Tau-charm Urheim( presented by Artuso)
Neutrinos Cavata
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Super KEKB, PEP-II, L1035-36/cm2/sec BTeV, LHCb
and B physics at ATLAS/CMS
G. Hiller
Scenarios for flavor physics beyond the SM.
Signatures in time-dependent CPV (f KS) , rare
decays (e.g. b?s l l- , b?s ?)
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KEKB upgrade strategy
L1036
Constraint 48GeV x 3.5GeV 4wall plug
pwr.lt100MW 4crossing anglelt30mrad
ILER20A
ILER9.4A
Increase RF
L2x1035
One year shutdown to 4install ante
chamber 4increase RF 4modify IR
ILER1.5A
L2x1034
Present KEKB L1034
Crab crossing
ILER1.5A
?Ldt 350fb-1
2002
03
04
05
08
07
06
09
10
11
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PEP-II Upgrade Plans
lt2005
gt2005

• Now Projected Upgrade
• LER energy 3.1 3.1 3.1? GeV
• HER energy 9.0 9.0 9.0? GeV
• LER current 1.8 2.4 3.3 A
• HER current 1.0 1.4 1.5 A
• y 12.5 9.0 5.0 mm
• ?x 35 35 35 cm
• X emittance 50 50 50 nm-rad
• Estimated sy 5 4.3 3 mm
• Bunch spacing 1.89 1.89 1.26 m
• Number of bunches 921 1130 1700
• Collision angle head-on head-on ?3.25 mrads
• Beam pipe radius 2.5 2.5 2.5 cm
• Luminosity 5?1033 8?1033
  2?1034 cm-2 sec-1

M. Giorgi
76

• Fully simulated bb event at LHCB
• incl. multiple scattering, hadronic interactions
• decays in flight
• Kalman fitter

27tracks/event/detector
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BTeV LHCb

• Dedicated Hadron Collider B experiments
• Tevatron
  LHC
• 
  LHCb

Magnet being installed
vtx trigger
PbWO4
Favorable x-section/background ratio (10 3)
compared to HERA-B, old FNAL fixed target.
Radiation hard technologies.
78
Overview of the LHC B physics potential
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BTeV LHCb

• Sensitivity to Bs mixing up to xs 80
• Large rare decay rates Bo?Koll- 2500 events in
  107 s
• Measurement of ? to 7o using Bs?Ds K-
• Measurement of a to 4o using Bo??p (BTeV)
• Measurement of ?related to the phase of
• Bs mixing to 1o using Bso?J/?? (BTeV)
• or Bso?J/?f

80
Purely leptonic decays (fD, fDs) ?CLEO-C is
starting
fDs Values from Ds???

CLEO-C MC
MM2 of D ? mn with 1 fb-1 of CLEO-C data 2
precision
81
JHF
JAERI _at_ Tokai-mura Machine fubded
12/2000 Construction 2006
Measure Vub (?13) and CPV in neutrinos
82
Nous remercions les organisateurs
We thank the organizers ????????????
FPCP2003 Paris
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BACKUP SLIDES
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An independent estimate of the Gronau-Wyler
construction
Uses current central values