adi bornheim - weizmann institute of science · charm and beauty spectroscopy at b-factories and...
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Charm and Beauty Spectroscopy at B-Factories
andthe Future at CLEO-c
Adi Bornheim CALTECH
For the CLEO Collaboration
Rehovot, Israel, 21 October 2003
Workshop on Heavy Quark Physics at the Upgrade HERA Collider
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c2
Outline of the Talk
• Heavy Flavor Spectroscopy
• Experimental landscape at the - and -Resonances : The CLEO, BaBar, Belle and the BES experiments.
• Recent Results from charm-spectroscopy• Recent Results from beauty-spectroscopy
• The Future at CLEO-c and elsewhere
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c3
Introduction – Heavy Flavor Spectroscopy
• Hadronic matter are bound states made from quarks. • Quarks interact – and hadrons are held together - via the strong force. (Quarks also interact electromagnetically, weakly and via gravitational force …) • The field theory describing the interaction is called QCD – the field quants are gluons.• The scale (the mass) of most hadrons is too low to employ pertubation theory – thus it is hard (or for practical purposes impossible ) to calculate parameters (mass, width) of the quark bound states this way. (In fact it is hard or impossible to calculate almost anything reliably at a scale ~QCD )• Other techniques – HQET, LQCD – were developed to overcome these problems. Simple potential models work to some extent too. But :Today we are still unable to calculate eg. the full bound state spectrum for all possible quark combinations.• HQET and LQCD have been of crucial importance for recent advances in B-physics. In fact, they are considered the key in answering the questions to what extend out current model quark mixing is complete.
We have heard a lot about the theory - and a lot about heavy flavor dynamics - here a simplistic view about heavy flavor spectroscopy :
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c4
CLEO II/II.V Detector (1990-1999)
Magnet Yoke
Barrel CsI Calorimeter
Endcap CsI Calorimeter
Muon Chambers
Endcap TOFVertex Detector
Barrel TOF
Drift Chamber
Superconducting Coil
Silicone Vertex Detector
Almost hermetic detector
CLEO Operates at the Symmetric e+e- Collider CESR
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c5
CLEOII/II.V (1990-1999) and CLEOIII (2000-2002)
CLEOII CLEOIII
‘Low mass’ drift chamber (He based gas, low mass endplate)
Ring Imaging Cherenkov Detector
Thinner beam pipe, More compact vertex detector
SC final focus magnets
B-Physics experiment detector generation n n+1 …
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c6
The Belle Detector at KEKB
/ KL detection 14/15 layer RPC+Fe
Central Drift Chamber He/C2H5
CsI(Tl) 16X0
Aerogel Cherenkov counter n=1.015~1.030
Si Vertex detector 3 lyr. DSSD
SC solenoid1.5T
8GeV e
3.5GeV e
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c7
e-
e+
1.5T Solenoid
Instrumented Flux Return
Electromagnetic Calorimeter
Drift Chamber
Detector for internally reflected Cherenkov light
(3.1 GeV)
(9.0 GeV)
Silicon Vertex Tracker
144 synthetic quartz bars11000 PMT
40 layers 80:20 helium:isobutan NTP
Resistive plate chambers (L3 detector type)18 – 19 layers
5760+820 CsI(Tl) crystals; X0 = 16.1 – 17.6
5 layer double sided silicon strip;Lifetime ~ 4 Mrad
The BaBar Detector at PEPII
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c8
Current Data Sets
• CLEO II/II.V : 13.4 fb-1 , CLEOIII : 9.4 fb-1 , both at Ecm~ 10 GeV,
CLEO-Resonance : 1 - 2 fb-1 at the (1S), (2S) and (3S) resonances and some data around the resonances
• CLEO-c later
• BaBar : 135 fb-1, Ecm~ 10 GeV, ~10 fb-1/month now
• Belle : 160 fb-1 , Ecm~ 10 GeV, up to 15 fb-1/month later 2003 / early 2004
both will roughly double their data sets until end 2004 both plan upgrades to ‘Super-B-Factories’ with several ab-1
• BESII : L ~ ~51030 /cm2s at J/ peak , Ecm~ 2-5 GeV
BESIII is now approved - operational after 2006
The detectors are very similar, the accelerators make all the difference :
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c9
The Discovery of the D*sJ(2317)
DS sideband 0 sideband
BaBar discovered a new state with a mass of 2317 MeV. (April 2003)
BABARBABAR
BABAR BABAR
M = 2316.8 0.4 MeV = 8.6 0.5 MeV
DsJ*(2317)+ Ds + 0
Ds + K+ K – +
Resolution from MC is = 8.9 0.2 MeV
hep-ex/0304021
M = 2317.6 1.3 MeV = 8.8 1.1 MeV
Ds+ K+ K – + 0
At the time the nature of this new state was unclear !
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c10
The Discovery of the DsJ(2457)
Signals in both channels, at
nearly the same value of M
Ds 0 mode :signal remains robust
Ds* 0 mode :53.3 +/- 9.7 events, width matches resol’n (~ 6.5 MeV)BaBar also saw a peak here
1+ partner of 0+ DsJ*(2317) ?
are these two separate particles?
2.32 GeV2.11
GeV
Ds 0
2.32 GeV
2.46 GeV
Ds* 0
Motivated by the BaBar analysis CLEOsearched for the D*sJ(2317) and DsJ(2457)
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c11
CLEO measurement of new DsJ States
CLEO Result : M(D*sJ) = 349.4 ± 1.0 MeV (D*sJ) = (8.0 ± 1.3) MeV M(DsJ) = 349.8 ±1.3 MeV (DsJ) = (6.1 ± 1.0) MeV
hep-ex/0305100
DsJ(2463)
Ds(1969)
D*sJ(2317)
D*s(2112)0
Random
Feed Up :
DsJ(2463)
Ds(1969)
D*sJ(2317)
D*s(2112)
0
Missing
Feed Down :
If a random photon is added to the Ds(1969)it becomes a D*s(2112) and the D*sJ(2317) is reconstructed as a DsJ(2463).
If the photon from the D*s(2112) decay is missed the DsJ(2463) is reconstructed as D*sJ(2317).
Feed up rate : ~50% BaBar, ~25% CLEO, ~30% Belle
Feed down rate : ~18% CLEO
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c12
Belle measurement of DsJ Properties
consistent with zero intrinsic width
M=2317.2 0.5 0.9 MeV/c2 M=2457.5 1.3 1.1 MeV/c2
hep-ex/0307052
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c13
Belle measurement of DsJ in B-decays
B->D DsJ(2317)
DsJ(2317)->Ds 0
B (B D DsJ(2317)) x B (DsJ(2317) Ds*0) = (8.52.02.6) x 10-4
B (B D DsJ(2457)) x B (DsJ(2457) Ds*0) = (17.84.25.3) x 10-4
B (B D DsJ(2457)) x B (DsJ(2457) Ds = (6.71.32.0) x 10-4hep-ex/0308019
B->D DsJ(2457)
DsJ(2457)->D*s 0
B->D DsJ(2457)
DsJ(2457)->Ds
Belle takes advantage of ‘full reconstruction’ of B-decays and their huge data set
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c14
Overview of DsJ Results on M
All three experiments give consistent results
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c15
Belle measurement of DsJ(2457)Ds Decays
BF(DsJ(2457)->Ds)BF(DsJ(2457)->Ds*)
0.63 0.15 0.15 (continuum) 0.38 0.11 0.04 (B decays)
= = 0.47 0.10
Consistent with 1+ hypothesis, 0+, 2+ are excluded
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c16
DsJ(2317) and DsJ(2457) Summary
• BaBar discovers the DsJ(2317).
• CLEO and Belle confirm BaBar’s observation of DsJ(2317).
• DsJ(2457) is firmly established by CLEO.
• Belle observes both DsJ(2317) and DsJ(2457) in B D DsJ decays: consistent with 0+ and 1+ (both having jq=1/2).
• DsJ(2457)-> Ds decay is observed by Belle both in continuum and B decays, angular analysis favours the JP=1+ hypothesis of DsJ
(2457)Other explanations : DK molecule (hep-ph/0305025, Lipkin et. al.); Datom (PLB 567 (2003) 23, Szczepaniak); four quark particle(several authors eg. PLB 566 (2003) 193; hep-ph/0306187; PRD 68 (2003) 011501); low mass threshold (hep-ph/0305035);Non-relatvistic vector and scalar exchange force (hep-ph/0305012)
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c17
Measurement of the ‘c
by CLEO, BaBar and Belle
M(’c) WORLD = 3637.7±4.4 MeV (Belle)
ee→ JX
B→ K(KsK+)
(2S) →X
→ KsK+
→ KsK+
All three experiments find a ‘c candidate in various modes with consistent mass.CLEO Analysis : ‘c in collisions. 65+17 M=3642.6±1.2 CLEOII/III sig.: 5.0/5.7 -14
CLEO CONF 03-05
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c18
Much more results …
ee→ JX
=MX
3630 ± 8 MeVBelle 102 fb-1
Updated this year
BELLE-CONF-0331
~10 times larger than expected
~ 1 pb
~ 0.06 pb
~ 0.06 pb
2002 results
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c19
Observation of b(2P) (1S) by CLEO
So far -transitions were the only observed hadronic transitions. -transitions are the only other non-suppressed transition.
B (b1(2P) (1S)) = (1.6 ± 0.3 ± 0.2) %B (b2(2P) (1S)) = (1.1 ± 0.3 ± 0.1) %
Three pion mass spectrum
Photon energy spectrum
CLEO CONF 03-06
KinematicalyForbidden region
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c20
CLEO Search for the b(1S)
The S0 states of the bb system(also referred to as the b )have not been observed to date.
Experimental signature :Photons from (3S) b(1S) via M1 transitions
Tune search with E1 transitions :b(2P) (1S)
Experimental challenge :0 rejection
CLEO CONF 02-05
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c21
CLEO Search for the b(1S)Sum of 3 E1 transitions peaksused to tune fit
Search for M1 photons in the expected mass range Maximum yield : 698± 463 events (1.5 ) No Evidence for the b(1S)
90 % CL UL CLEOIII (Prel.)
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c22
Spectroscopy: Observation of (13D2)
Preliminary results at ICHEP02 Update: More data and better background
suppression
e+e-,
M((13D2))= 10161.1 ± 0.6 ± 1.6 MeV
Theory = 3.8 10-5 (Godfrey & Rosner PRD 64 097501 (2001))
B((1D2) (1S))B((1D2) (1S))
< 0.25 (90% C.L.)
Recoil mass
CLEO III
B((3S) (1D) (1S) l+l-) = (2.6 ± 0.5 ± 0.5) 10-5
B((3S) (1D)) x B((1D) (1S)) < 2.3 10-4
CLEO CONF 02-06
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c23
More CLEO …
• More hadronic transitions of resonances -e.g. two body PS-V decays.
• Kinematic distributions in transitions of .
• Properties of the resonances (width etc.).
• Photon transitions of and resonances.
Preliminary results of all of the above have been shown this summer.Final results are expected in the next few month.
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c24
CLEO-c – The ContextCLEO made major contributions to B/c/ physics. But, with the spectacular success of the B factories, CLEO is no longer taking data at the (4S) resonance. Last run was June 25th, 2001.
The Past
Flavor Physics is in the “B Factory era” akin to precision Z. Over-constrain CKM matrix with precision measurements. Limiting factor is non-pertubative QCD.
The Present
The Future
LHC may uncover strongly coupled sectors in the physics that lie beyond the Standard Model. The LC may then study them.
Strongly-coupled field theories are an outstanding challenge to theoretical physics. Critical need for reliable theoretical techniques & detailed data to calibrate them.
Example:
Lattice QCD
Complete definition of pertubative & non-pertubative QCD.
Matured over last decade and can calculate to 1-5% B, D, , …
Charm at threshold can provide the data to calibrate QCD techniques Convert CESR/CLEO to a charm/QCD factory
CESR-c/CLEO-c
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c25
CLEO-c Physics ProgramCharm measurements Precise charm absolute branching ratio measurements Leptonic decays: decay constants fD and fDs Semileptonic decays: form factors, Vcs, Vcd, test unitarity Hadronic decays: normalize B physicsQCD studies Precise measurements of quarkonia spectroscopy
Searches for glue-rich exotic states: Glueballs and hybrids
Probes for Physics beyond the Standard Model D-mixing, CP Violation, rare D decays
Possible additions to Run Plan ’ spectroscopy, threshold, c threshold, R scan
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c26
The Cornell Electron Storage Ring
EBEAM= 1.5 – 5.6 GeV
12 additional wigglers to improve transverse cooling
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c27
CESR-c
CESR: L((4S)) = 1.3.1033 cm -2 s-1
3.64.1 GeV3.03.77 GeV2.03.1 GeV
L(1032 cm-2 s-1 ) s
CESR-c:
One day scan of ’:
Expected machine performance: Ebeam ~ 1.2 MeV at J/
L ~ 1.1030
(~BES)
Ebeam
(nb)
J/ J/
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c28
The CLEO-c Detector
SC quad pylon
Magnet iron
Muon chambers
Superconducting Solenoid coil
Ring Imaging Cherenkov detectorBarrel calorimeter
Endcap calorimeter
Iron polepiece
SC quads
Rare earth quad
Drift chamberInner tracker / BeampipeRing Imaging Cherenkov
83% of 487% Kaon ID with 0.2% fake @ 0.9GeV
Muon system85% of 4for p >1 GeV
Drift chamber/ Inner tracker93% of 4p/p = 0.35% @ 1 GeVdE/dx: 5.7% p @ min-Ionizing
Cesium Iodide Calorimeter93% of 4E/E = 2% @ 1GeV = 4% @ 100MeV
Trigger - Tracks & ShowersPipelinedLatency = 2.5ms
Data AcquisitionEvent size = 25kBThruput < 6MB/s
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c29
NEW - Inner Drift Chamber
6 layers2cm < R < 12cmAll stereo300 channels
Replace Silicon Vertex Detector with Inner Drift Chamber
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c30
Run Plan CESR/CLEO
2002 – 2003
Prologue :
(3770) ~3 fb-1 ( (3770) DD)
30 million DD events, 6 million tagged D decays 310 times MARK III data
Year 1 :
Upsilon ~1-2 fb-1 each at (1S), (2S), (3S), and (5S)
Spectroscopy, matrix elements, ee, b, hc Last run of CLEO III @ (5S) on March 3rd 2003
Year 2 :s ~ 4140 MeV ~3 fb-1
1.5 million DsDs events, 0.3 million tagged Ds decays 480 times MARK III data, 130 times of BES data
Year 3 :(3100) ~1 fb-1
1 billion J/ decays 170 times MARK III data, 20 times BES II data
CLEO-c
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c31
CLEO-c Signature(3770) events are simpler than (4S) events!
(4S) event (3770) event
D0K-+ D0 K+e-
The demands of doing physics in the 3 - 5 GeV range are easily met by the existing detector
BUT B factories: 400 fb-1 ~500M cc by 2005 What is the advantage of running at threshold?
• Charm events produced at threshold are extremely clean
• Large cross section, low multiplicity
• Pure initial state: no fragmentation
• Signal/Background is optimum at threshold
• Double tag events are pristine These events are the key to make absolute BR measurements
• Neutrino reconstruction is clean
• Quantum coherence aids D mixing & CP violation studies
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c32
Precision Flavor PhysicsGoal for the decade:
High precision measurements of all CKM matrix elements & associated phases – over-constrain the “Unitary Triangles” Inconsistencies New Physics !
Vub / Vub= 17% 5%l-B
D K
Bd
Vus / Vus = 1%
Kl-
Vud / Vud = 0.1% e-
p
n
tb
W
l-D
l- B
l-
D
Vcd / Vcd = 7% 1.7%
Vtb / Vtb = 29%Vts / Vts = 39% 5%Vtd / Vtd = 36% 5%
Vcb / Vcb = 5% 3%Vcs/Vcs=11% 1.6%
Bd Bs Bs
Many experiments will contribute: CLEO-c will enable precise 1st column unitarity test & new measurements at B-Factories/Tevatron to be translated into greatly improved CKM precision
CKM Matrix Current Status:
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c33
Absolute Charm Branching Ratios
Monte CarloD- tag
D+ K- + +
Double tag technique:Almost zero background in hadronic tag modes
Measure absolute B(D X) with double tags
B = # of X
# of D tags
CLEO-cPDG
6,000
60,000
53,000
Double tags
3
3
3
L (fb-1)
1.9254140Ds
0.77.23770D+ K- + +
0.62.43770D0 K- +
B / B (%)sDecay
CLEO-c: potential to set absolute scale for all heavy quark measurements
50 pb-1 ~1,000 events x2 improvement (stat) on D+ K- + + PDG B/B
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c34
Comparison: B Factories & CLEO-c
0
5
10
15
20
25
30
Error (
%)
Monte Carlo
CLEO-c
Ds
CLEO: fDs: Ds* Ds with Ds
M = M() – M() / GeV
bkgd CLEO-c 3 fb-1
PDGB Factory 400 fb-1
Statistics limited
Systematics & Background limited
fD fDs
B(D+ K)
B(Ds )
B(D0
K)
Error (%)
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c35
Semileptonic Decays |VCKM|2 |f(q2)|2
d/dp
d/dp
p
p
First time measurement of complete set of charm PS PS & PS V absolute form factor magnitudes and slopes to a few % with almost no background in one experiment
Stringent test of theory!
CLEO-c
Monte Carlo
Lattice
D0 l
D0 l
Emiss - Pmiss
Monte Carlo
D0 Kl
D0 l
Tagged Events & Low Bkg
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c36
CLEO-c Impact on Semileptonic B/B
0102030405060708090
100
1 2 3 4 5 6 7 8 9 10 11
Decay modes
Erro
r (%
)
1: D0 K- e+
2: D0 K*- e+
3: D0 - e+
4: D0 - e+
5: D+ K0 e+
6: D+ K*0 e+
7: D+ 0 e+
8: D+ 0 e+
9: Ds K0 e+
10: Ds K*0 e+
11: Ds e+ CLEO-c will make significant improvements in the precision with which each absolute charm semileptonic branching ratio is known!
CLEO-c
PDG
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c37
Determining Vcs and Vcd
Combine semileptonic and leptonic decays – eliminating VCKM
(D+ l ) / (D+ l ) independent of Vcd
Test rate predictions at ~4% level
(Ds l ) / (Ds l ) independent of Vcs
Test rate predictions at ~4.5% level
Test amplitudes at 2% level
Stringent test of theory - If theory passes test …
D0 K- e+ Vcs/Vcs = 1.6% (now: 11%)
D0 - e+ Vcd/Vcd = 1.7% (now: 7%)
Use CLEO-c validated lattice to calculate B semileptonic form factor Then B factories can use B ///lfor precise Vub determination.
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c38
CLEO-c Physics ImpactCrucial Validation of Lattice QCD: Lattice QCD will be able to calculate with accuracies of 1 - 2%. The CLEO-c decay constant and semileptonic data will provide a “golden” & timely test . QCD & charmonium data provide additional benchmarks.
World Average
~2005
(excluding CLEO-c)
World Average
withCLEO-c
Assumes theory errors reduced by x2
Theory errors = 2%
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c39
CLEO-c Physics Impact• Knowledge of absolute charm branching fractions is now contributing significant errors to measurements involving b’s. CLEO-c can also resolve this problem in a timely fashion.• Measuring the relative strong phase between D0K*+K- and D0 K*-K+ is crucial to determining angle with B KD0, D0 K*K
• Improved knowledge of CKM elements, which is now not very good
1.7%
7%
Vcd
1.6%
11%
Vcs
3%
5%
Vcb
5%
17%
Vub
5%5%
39%36%
VtsVtdPDG
CLEO-c Data and
LQCD
B Factory/Tevatron Data & CLEO-c
Lattice Validation
• The potential to observe new forms of matter – glueballs & hybrids – and new physics – D mixing / CP Violation / rare decays – provides a discovery component to the CLEO-c research program.
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c40
fDs from Absolute B(Ds +)
Monte Carlo
DS tag
DS
|fD|2
|VCKM|2• Measure absolute
B(DS )
• Fully reconstruct one D (tag)
• Require one additional charged track and no additional photons
• Compute MM2
• Peaks at zero for DS
+ +decay
• Expect resolution of ~O(M)
Vcs (Vcd) known from unitarity to 0.1% (1.1%)
CLEO-cPDG
3
3
3
L (fb-1)
3770
4140
4140
Energy (MeV)
2.3ULD+ fD+
1.633Ds+ fDs
1.917Ds+ fDs
f / f (%)ReactionDecay
Constant
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c41
Open Charm ProductionThe (3770) is by far the best place to determine absolute charm branching ratios.
1984 1988 2000 2005 2010Year
MARKIII BESII BESIII Construction
BESIII Engineer &
Physics Run
CLEO-c Physics Run
8 pb-1BES II
5 pb-1CLEO III
30 fb-1
3 fb-1
9.6 pb-1
L
BES III (approved)
CLEO-c
Mark III
Experiments at (3770)
0.001
0.01
0.11
10
100
1000
10000
J/psi psi(2S) psi(3770) Ds Pairs(4100)
Family
Numb
er of
Even
t (Millio
n)
MARKIIIBESI/II
CLEO-c
BESIII
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c42
CLEO-c Probes of QCDVerify tools for strongly coupled theoriesQuantify accuracy for application to flavor physics
• and spectroscopy
Masses, spin fine structure
• Leptonic widths of S-states
EM transition matrix elements resonances done in fall 2001 - fall 2002 ~4 fb-1
DD / DsDs running in 2003 – 2004 anticipate each ~3 fb-1 J/ running in 2005 anticipate 1 billion J/
• Uncover new forms of matter – gauge particles as constituents
Glueballs G = | gg Hybrids H = | gqq
The current lack of strong evidence for these states is a fundamental issue in QCD Requires detailed understanding of the ordinary hadron spectrum in the 1.5 – 2.5 GeV mass range
Confinement, Relativistic corrections
Wave function Tech: fB,K BK fDs
Form factors
Rich calibration and testing ground for theoretical techniques apply to flavor physics
Study fundamental states of the theory
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c43
Gluonic Matter
• Many Glueball sightings without confirmation
CLEO-c 1st high statistics experiment with modern 4 detector covering the 1.5 - 2.5 GeV mass range
Radiative J/ decays are ideal glue factory anticipate 60 million J/ radiative decays
• Branching ratios of f0 triplet from WA102 (D. Barberis et al., Phys. Lett.B 479 59 (2000))
Input for glueball - scalar mixing models (F. Close et al., Eur. Phys. J. C 21 531 (2001))
)%90(05.0)1710(
')1710(
14.048.0)1710()1710(
03.020.0)1710()1710(
16.052.0)1500(
')1500(
07.032.0)1500()1500(
84.05.5)1500()1500(
21.035.0)1370()1370(
90.017.2)1370()1370(
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
clff
KKff
KKfffff
KKfff
KKff
KKff
250,000J/ f0(1710): f0(1710) KK
93,000J/ f0(1710): f0(1710)
123,000J/ f0(1710): f0(1710) +-+-
123,000J/ f0(1500): f0(1500) +-+-
CLEO-cMode
J/
c
c
X
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c44
CLEO III Running at(3770)
9.1M(2S)
1300.0 pb-1
21,300 events
= 26%B = 1.5T
Ecm – Mass(recoiling +-)
= 37%B = 1.0T
= 37%B = 1.0T
1.5M(2S)
2.7 pb-1
21,000 events
4.5k(3770)
5.2 pb-1
232 events
Calibration Modes (3770) +- J/• Data sample: 5.2 ± 0.2 pb-1
• (4.5 ± 0.4) 104 (3770) decays
• Efficiency: 37.1%
• < 4.75 events at 90% C.L.
?
Upper limit branching ratio:
B( (3770) +- J/ ) < 0.26% at 90% C.L.
BES II: B = (0.59 ± 0.26 ± 0.16)%(hep-ex/0307028)
CLEO III
+-l+l- eventsAfter cuts on M(l+l-) to make it close to M(J/ ) or M((2S))
(2S) +- (1S)
(2S) +- J/
e+e- (2S) (2S) +- J/ (3770) +- J/
21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c45
Summary
•There are many new results on Heavy Flavor Spectroscopy - some come as a surprise and challenge theory - some were expected but are only now in reach of the experiment
•Many more results are to be expected because of rapidly growing data sets, new experimental efforts are starting or are being planed.
•HQET and LQCD are expected to catch up with the precision and breadth of new results.
•The Heavy Flavor Community expects major progress in the forthcoming years.