Workshop on Heavy Quark Physics at the Upgrade HERA Collider
Charm and Beauty Spectroscopy at B-Factories and the Future at CLEO-c
Adi Bornheim CALTECH For the CLEO Collaboration
Rehovot, Israel, 21 October 2003 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
2 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Introduction – Heavy Flavor Spectroscopy
We have heard a lot about the theory - and a lot about heavy flavor dynamics - here a simplistic view about 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.
3 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO II/II.V Detector (1990-1999)
Almost hermetic detector
Muon Chambers
Superconducting Coil Barrel CsI Calorimeter Drift Chamber Silicone Vertex Detector Vertex Detector Endcap TOF Endcap CsI CBarlroerl iTmeOFter
Magnet Yoke
CLEO Operates at the Symmetric e+e- Collider CESR
4 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEOII/II.V (1990-1999) and CLEOIII (2000-2002)
B-Physics experiment detector generation n n+1 …
CLEOII Ring Imaging Cherenkov Detector CLEOIII
‘Low mass’ drift chamber (He based gas, low mass endplate)
Thinner beam pipe, SC final focus magnets More compact vertex detector
5 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The Belle Detector at KEKB
SC solenoid Aerogel Cherenkov counter 1.5T n=1.015~1.030 3.5GeV CsI(Tl) e
16X0
8GeV e Central Drift Chamber
He/C2H5
/ KL detection Si Vertex 14/15 layer detector RPC+Fe 3 lyr. DSSD
6 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The BaBar Detector at PEPII
Silicon Vertex Tracker 5 layer double sided silicon strip; Detector for internally Lifetime ~ 4 Mrad reflected Cherenkov light 144 synthetic quartz bars 11000 PMT e+
(3.1 GeV)
Drift Chamber 40 layers 80: 20 helium:isobutan NTP
e- (9.0 GeV) 1.5T Solenoid
Electromagnetic Calorimeter 5760+820 CsI(Tl) crystals; X = 16.1 – 17.6 Instrumented Flux Return 0 Resistive plate chambers (L3 detector type) 18 – 19 l aye r s 7 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Current Data Sets
The detectors are very similar, the accelerators make all the difference :
-1 -1 • CLEO II/II.V : 13.4 fb , CLEOIII : 9.4 fb , 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
-1 -1 • BaBar : 135 fb , Ecm~ 10 GeV, ~10 fb /month now -1 -1 • Belle : 160 fb , Ecm~ 10 GeV, up to 15 fb /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
30 2 • BESII : L ~ ~510 /cm s at J/ peak , Ecm~ 2-5 GeV BESIII is now approved - operational after 2006
8 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The Discovery of the D*sJ(2317)
BaBar discovered a new state with a mass of 2317 MeV. (April 2003)
+ + 0 DsJ*(2317) Ds BABAR BABAR + + – + Ds K K M = 2316.8 0.4 MeV = 8.6 0.5 MeV
+ + – + 0 Ds K K M = 2317.6 1.3 MeV = 8.8 1.1 MeV BABAR BABAR Resolution from MC is = 8.9 0.2 MeV
At the time the nature of this new
0 state was unclear ! DS sideband sideband
hep-ex/0304021 9 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The Discovery of the DsJ(2457) 2.32 2.11 GeV Motivated by the BaBar analysis CLEO GeV searched for the D*sJ(2317) and DsJ(2457) D 0 Signals in both channels, at s nearly the same value of M
Ds 0 mode : signal remains robust 2.46 2.32 0 GeV Ds* mode : GeV 53.3 +/- 9.7 events, width 0 Ds* matches resol’n (~ 6.5 MeV) BaBar also saw a peak here
+ + 1 partner of 0 DsJ*(2317) ?
are these two separate particles? 10 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO measurement of new DsJ States
Feed Up : DsJ(2463)
D*sJ(2317) If a random photon is added to the Ds(1969)
it becomes a D*s(2112) and the D*sJ(2317) 0 is reconstructed as a DsJ(2463).
D*s(2112) Feed up rate : ~50% BaBar, ~25% CLEO, ~30% Belle Ds(1969) Random
Feed Down : If the photon from the D*s(2112) decay is DsJ(2463) missed the DsJ(2463) is reconstructed D*sJ(2317) 0 as D*sJ(2317). Feed down rate : ~18% CLEO
D*s(2112) Ds(1969) Missing
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 11 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Belle measurement of DsJ Properties
2 M=2317.2 0.5 0.9 MeV/c M=2457.5 1.3 1.1 MeV/c2
consistent with zero intrinsic width
hep-ex/0307052 12 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Belle measurement of DsJ in B-decays
Belle takes advantage of ‘full reconstruction’ of B-decays and their huge data set
B->D DsJ(2317)
0 DsJ(2317)->Ds
B->D DsJ(2457)
0 DsJ(2457)->D*s
B->D DsJ(2457)
DsJ(2457)->Ds
0 -4 B (B D DsJ(2317)) x B (DsJ(2317) Ds* ) = (8.52.02.6) x 10
0 -4 B (B D DsJ(2457)) x B (DsJ(2457) Ds* ) = (17.84.25.3) x 10 (B D D (2457)) x (D (2457) D = (6.71.32.0) x 10-4 B sJ B sJ s hep-ex/0308019
13 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Overview of DsJ Results on M
All three experiments give consistent results
14 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Belle measurement of DsJ(2457)Ds Decays
Consistent with 1+ hypothesis, 0+, 2+ are excluded
BF(D (2457)->D ) 0.63 0.15 0.15 (continuum) sJ s = = 0.47 0.10 BF(DsJ(2457)->Ds* ) 0.38 0.11 0.04 (B decays)
15 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 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 P + analysis favours the J =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)
16 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c ‘ Measurement of the c by CLEO, BaBar and Belle
All three experiments find a ‘c candidate in various modes with consistent mass. -+1147 CLEO Analysis : ‘c in collisions. 65 M=3642.6±1.2 CLEOII/III sig.: 5.0/5.7
M(’c) WORLD = 3637.7±4.4 MeV (Belle)
+ → KsK
+ → KsK
ee→ JX
+ B→ K(KsK )
(2S) →X
CLEO CONF 03-05 17 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Much more results …
2002 results
~10 times larger than expected
-1 Belle 102 fb 3630 ± 8 MeV Updated this year ~ 1 pb ee→ JX ~ 0.06 pb
~ 0.06 pb
=MX
BELLE-CONF-0331
18 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Observation of b(2P) (1S) by CLEO
So far -transitions were the only observed hadronic Three pion mass spectrum 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) %
Photon energy spectrum
Kinematical yForbidden region
19 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO CONF 03-06 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 20 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO Search for the b(1S) Sum of 3 E1 transitions peaks used 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 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 3 Spectroscopy: Observation of (1 D2)
Preliminary results at ICHEP02 M((13D ))= 10161.1 ± 0.6 ± 1.6 MeV Update: More data and better background 2 suppression CLEO III Recoil mass
e+e-, B((3S) (1D)) x B -4 B((3S) (1D) (1S) l+l-) ((1D) (1S)) < 2.3 10 = (2.6 ± 0.5 ± 0.5) 10-5 B((1D2) (1S)) < 0.25 (90% C.L.) Theory = 3.8 10-5 B((1D2) (1S)) (Godfrey & Rosner PRD 64 097501 (2001)) CLEO CONF 02-06 22 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 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.
23 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO-c – The Context
CLEO made major contributions to B/c/ physics. But, with the The Past spectacular success of the B factories, CLEO is no longer taking data at the (4S) resonance. Last run was June 25th, 2001. Flavor Physics is in the “B Factory era” akin to precision Z. The Present Over-constrain CKM matrix with precision measurements. Limiting factor is non-pertubative QCD.
LHC may uncover strongly coupled sectors in the physics that lie beyond the Standard Model. The LC may then study them. The Future Strongly-coupled field theories are an outstanding challenge to theoretical physics. Critical need for reliable theoretical techniques & detailed data to calibrate them.
Example: Complete definition of pertubative & non-pertubative QCD. Lattice 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
24 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO-c Physics Program
Charm 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 QphCyDsi csstudies 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
25 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The Cornell Electron Storage Ring
12 additional wigglers to improve transverse EBEAM= 1.5 – 5.6 GeV cooling
26 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CESR-c
CESR: L((4S)) = 1.3.1033 cm -2 s-1 One day scan of ’:
J/ J/ (nb)
CESR-c: L ~ 1.1030
s L(1032 cm-2 s-1 ) (~BES) 3.1 GeV 2.0
3.77 GeV 3.0 Ebeam 4.1 GeV 3.6
Expected machine performance: Ebeam ~ 1.2 MeV at J/ 27 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c The CLEO-c Detector
Drift chamber/ Inner tracker Superconducting Solenoid coil 93% of 4 Barrel calorimeter /p = 0.35% @ 1 GeV p Ring Imaging Cherenkov detector dE/dx: 5.7% p @ min-Ionizing Drift chamber Ring Imaging Cherenkov Inner tracker / Beampipe 83% of 4 Endcap calorimeter 87% Kaon ID with 0.2% fake @ 0.9GeV Iron polepiece
Cesium Iodide Calorimeter 93% of 4
E/E = 2% @ 1GeV Muon chambers = 4% @ 100MeV
SC quad pylon
SC quads Data Acquisition Rare earth quad Event size = 25kB Thruput < 6MB/s
Muon system Magnet Trigger - Tracks & Showers 85% of 4 iron Pipelined for p >1 GeV Latency = 2.5ms
28 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c NEW - Inner Drift Chamber
Replace Silicon Vertex Detector with Inner Drift Chamber
6 layers 2cm < R < 12cm All stereo 300 channels
29 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Run Plan CESR/CLEO
-1 2002 – 2003 Upsilon ~1-2 fb each at (1S), (2S), (3S), and (5S) Spectroscopy, matrix elements, , , h Last run Prologue : ee b c of CLEO III @ (5S) on March 3rd 2003
(3770) ~3 fb-1 ((3770) Year 1 : DD) 30 million DD events, 6 million tagged D decays 310 times MARK III data s ~ 4140 MeV ~3 fb-1 Year 2 : 1.5 million D D events, 0.3 million tagged D decays 480 s s s CLEO-c times MARK III data, 130 times of BES data
(3100) ~1 fb-1 Year 3 : 1 billion J/ decays 170 times MARK III data, 20 times BES II data
30 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO-c Signature
(3770) events are simpler than (4S) events! (4S) event (3770) event 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? D0K-+ D0 K+e- • Charm events produced at threshold • Double tag events are pristine are extremely clean These events are the key to make • Large cross section, low multiplicity absolute BR measurements • Pure initial state: no fragmentation • Neutrino reconstruction is clean • Signal/Background is optimum at • Quantum coherence aids D mixing & threshold CP violation studies 31 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Precision Flavor Physics
Goal for the decade: High precision measurements of all CKM matrix elements & associated phases – over-constrain the “Unitary Triangles” Inconsistencies New Physics !
Vud / Vud = 0.1% Vus / Vus = 1% Vub / Vub= 17% 5% e- l- l- n K B p
Vcs/Vcs=11% CKM Matrix Vcd / Vcd = 7% 1.7% Vcb / Vcb = 5% 3% - 1.6% - - Current l l l D D B Status: K D
Vtd / Vtd = 36% 5% Vts / Vts = 39% 5% Vtb / Vtb = 29% W t Bd Bd Bs Bs b 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
32 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Absolute Charm Branching Ratios
Double tag technique: D- tag Monte Carlo Almost zero background in D+ K- + + hadronic tag modes
Measure absolute B(D X) with double tags # of X B = # of D tags
B / B (%) Decay s L (fb-1) Double tags PDG CLEO-c D0 K- + 3770 3 53,000 2.4 0.6 D+ K- + + 3770 3 60,000 7.2 0.7
Ds 4140 3 6,000 25 1.9 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 33 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Comparison: B Factories & CLEO-c
CLEO: fDs: Ds* Ds with Ds
bkgd CLEO-c B Factory PDG 3 fb-1 400 fb-1 Statistics Systematics & limited Background limited 30 M = M() – M() / GeV Error (%) B(Ds ) 25 Monte CLEO-c fD fDs Carlo 20
Ds 1) 5 % (
r o r r E 10 B(D+ K) 0 5 B(D K) 0
34 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 2 2 2 Semileptonic Decays |VCKM| |f(q )|
Monte CLEO-c D0 l Carlo 0 Tagged D l Events & d/dp Low Bkg Monte D0 Kl Carlo
p
Lattice
Emiss - Pmiss D0 l First time measurement of complete set
of charm PS PS & PS V absolute d/dp form factor magnitudes and slopes to a few % with almost no background in one experiment p Stringent test of theory! 35 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO-c Impact on Semileptonic B/B
1: D0 K- e+ 100 2: D0 K*- e+ 90 80 0 - + PDG 3: D e 70 0 - +
4: D e ) 60 %
( CLEO-c
+ 0 + r 50
5: D K e o r r
E 40 6: D+ K*0 e+ 30 7: D+ 0 e+ 20 8: D+ 0 e+ 10 0 9: D K0 e+ s 1 2 3 4 5 6 7 8 9 10 11 0 + 10: Ds K* e Decay modes
+ 11: Ds e CLEO-c will make significant improvements in the precision with which each absolute charm semileptonic branching ratio is known! 36 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 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 …
0 - + D K e Vcs/Vcs = 1.6% (now: 11%)
0 - + D e Vcd/Vcd = 1.7% (now: 7%) Use CLEO-c validated lattice to calculate B semileptonic form 37 21.10.20f03actor Then B facAtdoi Brorinehesim c Haeanvy Fulavsor eSp eBctro scopy and/ CL/EO-c/lfor precise Vub determination. CLEO-c Physics Impact
Crucial 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 Assumes theory Average errors reduced by x2 ~2005 (excluding CLEO-c)
World Theory errors = 2% Average with CLEO-c
38 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 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
V V V V V V • PDImpGroved knowcldedge cos f CKMcb elemubents, tdwhichts is now not very good 7% 11% 5% 17% 36% 39%
1.7% 1.6% 3% 5% 5% 5% CLEO-c B Factory/Tevatron Data and Data & CLEO-c LQCD 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.
39 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c + fDs from Absolute B(Ds )
|f |2 |V |2 Monte • Measure absolute D CKM Carlo B(DS ) • Fully reconstruct one D (tag) • Compute MM2 DS tag • Peaks at zero for D • Require one S + + additional DS decay charged • Expect resolution track and no of ~O(M ) additional Vcs (Vcd) known from unitarity to 0.1% (1.1%) photons Decay f / f (%) Reaction Energy (MeV) L (fb-1) Constant PDG CLEO-c
+ fDs Ds 4140 3 17 1.9
+ fDs Ds 4140 3 33 1.6
+ fD+ D 3770 3 UL 2.3
40 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Open Charm Production
The (3770) is by far the best place to determine absolute charm branching ratios. MARKIII 10000 BESI/II 1000 Experiments at (3770) L 100 CLEO-c ) n o
i BESIII
l 10 -1 l Mark III 9.6 pb i (M 1 t n
-1 e BES II 8 pb v 0.1 E f o
r 0.01
-1 e
CLEO III 5 pb b
m 0.001 u CLEO-c 3 fb-1 N J/psi psi(2S) psi(3770) Ds Pairs(4100) Family BES III (approved) 30 fb-1 CLEO-c Physics Run BESIII MARKIII BESII BESIII Engineer & Construction Physics Run
1984 1988 2000 2005 2010 Year 41 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO-c Probes of QCD Verify tools for strongly coupled theories Quantify accuracy for application to flavor physics
Confinement, Rich calibration • and spectroscopy Relativistic corrections and testing ground for theoretical Wave function Masses, spin fine structure techniques Tech: f B f B,K K Ds apply to flavor • Leptonic widths of S-states Form factors physics EM transition matrix elements resonances done in fall 2001 - fall 2002 ~4 fb-1 -1 DD / DsDs running in 2003 – 2004 anticipate each ~3 fb J/ running in 2005 anticipate 1 billion J/ • Uncover new forms of matter – gauge particles as constituents Study fundamental Glueballs G = | gg states of the theory Hybrids H = | gqq The current lack of strong evidence for these states is a fundamental issue in QCD Requires detailed understanding of the 42 21.10.2o00r3dinary hadron spectruAmdi B oirnhe itmh e H e1av.y5 F la–vo r2 S.p5ec tGrosceoVpy amnd CaLsEOs-c range Gluonic Matter
• Many Glueball sightings without confirmation c CLEO-c 1st high statistics experiment X with modern 4 detector covering the J/ c 1.5 - 2.5 GeV mass range Radiative J/ decays are ideal glue factory f (1370) anticipate 60 million J/ radiative decays 0 2.17 0.90 f0 (1370) KK f (1370) 0 0.35 0.21 • Branching ratios of f0 triplet from WA102 f 0 ( 1 3 7 0 ) K K (D. f (1500) Barberis et al., Phys. Lett.B 479 59 (2000)) 0 5.5 0.84 f0 (1500) f (1500) KK Input for glueball - scalar mixing models 0 0 . 3 2 0 . 0 7 f (1500) (F. Close et al., Eur. Phys. J. C 21 531 (2001)) 0 Mode CLEO-c f0 (1500) ' 0.52 0.16 f (1500) + - + - 0 J/ f0(1500): f0(1500) 123,000 f (1710) 0 0.20 0.03 f (1710) KK J/ f (1710): f (1710) +-+- 0 0 0 123,000 f (1710) 0 0.48 0.14 f0 (1710) KK J/ f0(1710): f0(1710) 93,000 f (1710) ' 0 0.05(90%cl) f (1710) J/ f0(1710): f0(1710) KK 250,000 0
43 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c CLEO III Running at(3770)
Calibration M odes CLEO III (3770) +- J/ = 26% B = 1.5T 9.1M(2S) • -1 Data sample: 5.2 ± 0.2 pb 1300.0 pb-1 + - (2S) (1S) • (4.5 ± 0.4) 104 (3770) decays 21,300 events • Efficiency: 37.1%
= 37% • < 4.75 events at 90% C.L. B = 1.0T 1.5M(2S) Upper limit branching ratio:
2.7 pb-1 (2S) +- J/ + - B((3770) J/) 21,000 events < 0.26% at 90% C.L.
= 37% 4.5k(3770) B = 1.0T BES II: B = (0.59 ± 0.26 ± 0.16)% 5.2 pb-1
+ - (hep-ex/0307028) e e (2S) 232 events + - (2S) J/ ? (3770) +- J/ +-l+l- events After cuts on M(l+l-) to make it + - Ecm – Mass(recoiling ) close to M(J/) or M((2S)) 44 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c 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.
45 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c BACKUP SLIDES
46 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c Spin Parity of DsJ Mesons
47 21.10.2003 Adi Bornheim Heavy Flavor Spectroscopy and CLEO-c