Talk outline

1Salvatore Fiore XLV International Winter Meeting on Nuclear Physics, 14-21 Jan 2007, Bormio

Hadronic physics at KLOE

Salvatore Fiore

(on behalf of the KLOE collaboration)Università di Roma “La Sapienza” and sez. INFN Roma


Talk outline

• DADANE and KLOENE and KLOE• Scalar Mesons Scalar Mesons

f0(980) f0(980) a0(980) 0 5 (f0+a0) K0K0KsKs sensitivity

evaluation).

• Pseudoscalar MesonsPseudoscalar Mesons --’ mixing angle and ’ mixing angle and ’ gluonic content’ gluonic content 0 (dalitz plot fit) massmass

• ee++ee-- c cross-Section below 1 GeVross-Section below 1 GeV• Kaon physicsKaon physics

B.R. determination andfit to the , spectra.


Physics at a – factory: a window on the lowest mass mesons

(1020)(1020)

a0(980)

f0(980)

'

KK

0-+ 1--

0++

(770)

Direct decayRadiative decay-emission

Main decay channels Branching fraction

K+K- 49.2 %

KSKL 34.0 %

+ 15.3 %

1.301 %

0.125 %

’ 6.2 × 10-5

~ 10-4

7÷8 × 10-5

+ “radiative return” to +-

#events in KLOE data = Br.F. × 8 × 109 ~108 ~105 ’, ,

decays give access to light mesons (scalar, pseudoscalar, vector)These processes allow to study the structure of these mesons, in particular their s-quark content via couplings with the (ss)


• (e+e )~3 b•Separate e+e- rings to reduce beam-beam

interactions•crossing angle: 25 mrad•Bunch crossing every 2.7 ns• injection during acquisition

The DANE e+e -factory

integrated Luminosity integrated Luminosity

2001-5:2001-5:

L dt = 2.5 fbL dt = 2.5 fb-1-1

L L peakpeak=1.5=1.5××10103232 cm cm-2-2ss-1-1

-factory : an e+e- collider with center of mass energy

s=m(s=m()=1019.4MeV)=1019.4MeV


Be beam pipe (spherical, 10 cm , 0.5 mm thick) + instrumented permanent magnet quadrupoles (32 PMT’s)• Drift chamber (4 m 3.75 m, CF frame) Gas mixture: 90% He + 10% iso-C4H10

12582 stereo sense wires almost squared cells

Calorimeter lead/scintillating fibers (1 mm ), 15 X0

4880 PMT’s 98% solid angle coverage • Superconducting coil (B = 0.52 T)

The KLOE experiment


KLOE detector specifications

E/E5.7% /E(GeV)t 54 ps /E(GeV) 50 psvtx() ~ 1.5 cm (neutral vertex resolution)

p/p0.4 % (tracks with > 45°)x

hit150 m (xy), 2 mm (z)x

vertex ~1 mm(M) ~1 MeV


Scalar mesons


(1020)

Mass (GeV/c2)

0.

Scalar Mesons Spectroscopy:f0(980), (500) and a0(980) are accessible through S (not accessible) Questions:1. Is (500) needed to describe

the mass spectra ?2. “couplings”of f0(980) and

a0(980) to |ss> and to KK, and .

allows to investigate the inner structure: 4-quark vs. 2-quark vs. KK molecule

Scalar Mesons

1.a0(980)

I=0 I=1/2 I=1

f0(980)

(500)

(800)


Previous resultsKLOE already published f0 and a0 results based on a sample

20 times smaller (20pb-1) than the statistics of the analysespresented in the following (~400pb-1):

2(1)

1(2)

e+

e-

background:subtracted assumingno interference with f0

Old f0(980)analysis

Old analysis

a0(980)

+-0

BR = (1.08±0.03stat±0.03syst±0.04norm)x10−4

Physics Letters B 537 (2002) 21–27


BR : = (8.51±0.51stat±0.57syst)x10−5

+-0=(7.96±0.60stat±0.40syst)x10−5



S to gS (GeV-1)S to kaons gSKK=gSK+K-=gSK0K0 (GeV)f0 to (I=0) gf0=√3/2 gf0=√3 gf0 (GeV)a0 to (I=1) ga0(GeV)Coupling ratio Rf0=(gf0K+K-/ gf0)2

(S=f0 or a0) Ra0=(ga0K+K-/ ga0)2

K-

Kaon Loop No Structure

f0,a0f0,a0

Definition of the relevant couplings

(Achasov - Ivanchenko Nucl.Phys.B315(1989)465, Achasov - Gubin Phys.Rev.D63(2001)094007, Achasov - Kiselev Phys.Rev.D68(2003)014006 )

(G.Isidori et al., JHEP0605(2006)049)

K+

K-


Event selectionEvent selection:: 2 tracks with t>45o; missing momentum >45o (large angle) pion identification through tracking, Time of Flight and Shower shape 1 photon matching the missing momentum

6.7 ×105 events / 350 pb-1

The analysis

Afb

dataMC no f0

MC with f0

m() (MeV)

Events

f0(980) signal

ISR

FSR

The +- final state is dominated by: Initial State Radiation Final State Radiation

m() (MeV)


Fit of the mass spectrum

Mass values ok

An acceptable fitis obtained with both models:P(2)(KL)=4.2%P(2)(NS)=4.4%

gf0K+K-> gf0

“Large” coupling to the

B.R.( f0(980) ) = 2.1 2.4 × 10-4 (from integral of |Amplitude|2)

We use 2 different models for the scalar amplitude: Kaon-loop (KL) No-Structure (NS)

P.L.B634 ,148 (2006)


The analysis

2 components in the Dalitz-plot

Non resonant

Resonant

Event selection: 5 photons with >21o ; no tracks; Kinematic fit energy-momentum conservation; Kinematic fit 0 masses: choice of the photon pairing to 0’s

4 ×105 events / 450 pb-1 analysis of Dalitz-plot


Comments:(500) is needed in KL fit [p(2) ~ 10-4 14% !]

(best parameters are: M=462 MeV, =300 MeV – Imposed to the fit); f0(980) parameters agree with analysis KL R > 1 (gf0KK > gf0) NS fit gives large gf0 but R<1 (??); BR extracted: integral of |scalar amplitude|2

f0(980) param. NS model KL model

mf0 (MeV) 981 ÷ 987 976 ÷ 987

gf (GeV-1) 2.5 ÷ 2.7 -

gf (GeV) 1.3 ÷ 1.4 1.4 ÷ 2.0

gfKK (GeV) 0.1 ÷ 1.0 3.3 ÷ 5.0

R=g2fKK /g

2f 0. ÷ 0.9 3.0 ÷ 7.3

With BR( ) ~ 1/2 × BR() and neglecting KK: BR(f0(980)) = (3.1 ÷ 3.5) × 10-4 , (f0(980)) = 1.2 ÷ 1.6 keV

Models: Improved Kaon-Loop (introducing the (500 “No Structure”

A good fitis obtained with both models:P(2)(KL)=14%P(2)(NS)= 4%

Dalitz plot fit

Accepted by EPJC(hep-ex/0609009)


To extract the relevant a0(980) parameters we fit the M spectrum

Two different models exploited:

1. Kaon loop (5 parameters) Ma0, ga0KK

2/(4),

ga0π/ga0KK, Br( π0 π0),

(phase between scalar and vector ampl.)

2. No structure (8 parameters) Ma0, ga0π, ga0,

ga0KK, c0 and c1 (complex)

a0

recoil gKK

ga0KK

ga0

0

K+

K

a0

ga0

ga0

0

e+

e-

(Achasov - Ivanchenko Nucl.Phys.B315(1989)465, Achasov - Gubin Phys.Rev.D63(2001)094007, Achasov - Kiselev Phys.Rev.D68(2003)014006 )

(G.Isidori et al., JHEP0605(2006)049)[a0 = (m; ga0π , ga0KK)]

IN PROGRESS

IN PROGRESS

The analysis


Analysis scheme

• dominant scalar contribution from a0(980) with a0(980)0

(exp. Br 7-8 10-5 – KLOE 2000 data)• vector contribution VP; VP' (V = , P,P' = ,0) (exp. Br 0.3-0.5 10-5 - VDM calculations) 5 final state

Background ProcessBackground Process Exp. S/B (MC)Exp. S/B (MC)

f0(980) 00 f0 0.7

e+e000 0 0.4

; 0 5 70

; 000 7 0.2

; 3 15

0 0 30

Total S/B 0.1

lost or merged photons

accidental or split clusters

Analyzed sample: Ldt = 424 pb-1

Pre-selection of 5 photon eventskinematic fit


EE11+E+E22+E+E33 < 980 MeV < 980 MeV

3 event rejection

E1+

E2+

E3 (

MeV

)

3a0

7 rejection 2

0(2nd fit)<24

Signal (Signal (aa00))

77 ππ00

ff00

d1

d2

M(MeV)

|M(1

)-

M(2

)

| =

|M

|

(MeV

)

|M|-d1 (MeV)

0 rejection

Cut: |M|< d1 .OR. |M|> d2 .OR. (ω0)<30° .OR. (ω0)>60°

ωω00 77

ff00 3 3 aa00

0

0

m(MeV)


Background evaluation

• datadata

ωω00 77

ff00 33 1+cos2

Backgroundsubtracted

• We rely on MC simulation for the description of the background shape and determine the several background components directly on data• A weight (Nfit / Nexpected(MC)) for each process has been determined from data


• N - iBi = 13099 172 events = 37.9 %• L = (424.0 2.5) pb-1 (0.6 % uncertainty – EPJC47)

= 3090 nb from () = (40.2 1.0) nb

• Br() = (39.38 0.26) %

Br(0) = (6.70 0.09stat 0.24syst) 10-5

Preliminary

Preliminary results (I)Preliminary results (I)


Systematics Br/Br

Bckg subtraction 1.7 %

Photon efficiency curves

1.2 %

Analysis cuts 1.7 %

Luminosity 0.6 %

2.5 %

Br() 0.7 %

Total 3.7 %

Br(0) = (6.70 0.09stat 0.24syst) 10-5

Br(0)

)-4(10 qqqq O

-510 2-1 qq

)(10 al.)et Close (Achasov, KK -5O

al.) et ova(Kalashnik KK

To extract the relevant aTo extract the relevant a00(980) parameters (980) parameters

we have to fit the Mwe have to fit the M spectrum spectrum

Preliminary results (II)Preliminary results (II)

Achasov-Ivanchenko Nucl.Phys.B315(1987),465Achasov-Gubin Phys.Rev.D56(1997),4084Close-Isgur-Kumano Nucl.Phys.B389(1993),513Kalashnikova et al., Eur.Phys.J.A24(2005),437


Kaon loop fitCombined fit: charged and neutral channel

Fit value Uncert.

Ma0 (MeV) 984.6 1.4

gaKK2/(4) (GeV2) 0.356 0.019

ga/gaKK 1.35 0.031(°) 207 12Br()-VDM 8.90E-07 3.80E-07

Br( )/Br( 0) 1.58 0.042 183.96ndf 139

P(2) 0.006

Preliminary

()

(π+ππ0)


qqqq

qq

gf0KK/ga0KK

Kaon loop

= mixing angle of s and non-s quarks in f0 and

Bugg) (Achasov; qqqq

KK ;qqqq:Bugg 00 fa

)17.3 Bugg (Achasov;

dduu qq 0

f

)-29 (Bugg, qq

ss qq 0 f

(f000) (f0+)

KL – combined

ga0/ga0KK

Couplings: ga0/ga0KK and f0/a0

Achasov-Ivanchenko Nucl.Phys.B315(1987),465Achasov-Gubin Phys.Rev.D56(1997),4084Bugg Eur.Phys.J.C47(2006),45 Eur.Phys.J.C47(2006),57Close-Isgur-Kumano Nucl.Phys.B389(1993),513Kalashnikova et al., Eur.Phys.J.A24(2005),437


(Achasov,Gubin Phys.Rev.D64:094016,2001)

-80000 4.36)x10 (1.29)KK)a(fBR(

f0(a0)

gKK

gf0(a0)KK

K0

K0

K+

K-

Linear sigma model:Linear sigma model: same graph as kaon loop, different coupling evaluations for gKK and gf0(a0)KK

Analysis scheme•We look for KSKS events, with both KS decaying in

•Trigger requirement•Two Vertices close to IP (regeneration rejection)•# of tracks: two tracks attached to each vertex are required

•Cut on KS reconstructed invariant mass and momenta•Cut on E2miss-P2miss

In progress: Kaon Kaon Loop model: meson couples to f0(a0) through a charged kaon loop

-80000 7.5x10)KK)a(fBR( (Escribano, hep-ph/0607325)

0000 KK)a(f


Preliminary: efficiency and sensitivity

B.R. sensitivity: 7.5B.R. sensitivity: 7.5··1010-8-8 @ 90%C.L @ 90%C.Lwith 420 pbwith 420 pb-1-1 MC sample MC sample

Evaluated according to: G. J. Feldman and R. D. Cousins, Phys. Rev. D57 Evaluated according to: G. J. Feldman and R. D. Cousins, Phys. Rev. D57 (1998) 3873(1998) 3873

The preliminary selection efficiencyselection efficiency we obtained is 24.2%24.2%

The expected number of background eventsbackground events is 77

Prelim

inary

Prelim

inary

B.R. (10-8)

Achasov

Escribano


Pseudoscalar mesons


BRBRMotivations of this analysis

• BRcan probe the ss and gluonium content of • The ratio R= BRBRcan be related to the mixing parameters and determine the mixing angle in the flavor basis P, the best parameter for a description of the mixing

• The two mixing parameter, has emerged from EPT and phenomenological analyses, in the flavor basis are equal apart from terms which violate OZI-rule

Method: measurement of

using similar and ’ decay chains: for the ’,for the

000,,

000 ,,


427 pb-1 (’01-’02 data)

N() = 1665000 1300

(no bck)

N(’s) = 375060

(Nbckg= 345)

N(´) = 3405 ±

61stat±28syst

signal (no bck) ’ signal (~10% bck)

Previous KLOE results Phys. Lett. B541 (2002)

Systematics are dominated by knowledge of ’ branching ratios

5

3

1043.061.010.6

10)31.047.070.4(

BR

R sysstat

Br()/Br()

Submitted to PLB

Submitted to PLB

(hep-ex/0612029)

(hep-ex/0612029)

5

3

1028.012.024.6

10)20.009.079.4(

BR

R sysstat

5

3

1028.012.024.6

10)20.009.079.4(

BR

R sysstatwith PDG BR()


gluonium content

R cot 2P cos2 G 1 ms

m CNS

CS

tanV

sin 2P

2

p

p

3

Using the approach by Bramon et al. [Eur. Phys. J. C7, 271(1999)] and introducing a possible gluonium content via cos2G one can extract the -’ mixing angle P :

P 39.70.7 tot 0

G 223 0

X1

2| uu dd Y | ss Z | glue

X 2 Y 2 Z 2 1

Combined analysis to evaluate possible gluonium content of ’ (4 constraints in X-Y-plane)

X

‘

Y ‘

KLOE R

' 0

' 0

' 0

P(sing)2=Z2=0.14 0.04

Submitted to PLB

Submitted to PLB

(hep-ex/0612029)

(hep-ex/0612029)

Black line:imposing Z=0


The 3 decay is sensitive to isospin symmetry breakingdue to light quark mass difference mu md.

with:

analysis

The amplitude decay A(X,Y) is expanded around the center

of the Dalitz-plot as:

A(X,Y)2 ≈ 1 + aY + bY2 + cX+ dX2+eXY + fY3

2ˆ du mm

m


Preliminary results

Nevents = 1.377 Mevts (450 pb-

1)

a b d fa 1 -0.226 -0.405 -0.795b 1 0.358 0.261d 1 0.113f 1

correlation matrix

Fitting with the C-violating parameters c and e left free we obtain: From our preliminary results (hep-ex/0410072)

(B. V. Martemyanov and V. S. Sopov, Phys. Rev. D 71 (2005) 017501)QQ22

= 22.8 = 22.8 0.4 0.4 Using Dashen rule

QQ22DD= 24.2= 24.2

Large NC evaluation confirms deviation from Dashen rule: QQ22LNCLNC= =

22.0 ± 0.622.0 ± 0.6

J. Kambor, C. Wisendanger and D.Wyler, Nucl. Phys. B 465 (1996) 215

)()(007.0006.0)(001.0)(003.0002.0 005.0003.0 syststatesyststatc

EMKKEM mmmm 20

220

2


Measurement of the (and 0) masses

Technique: kinematic fit mostly based on photon positions and timing; energy-momentum and vertex position from large angle Bhabha scattering

Mass (MeV)

3 Dalitz-plot

The and the peak are well defined

KLOE: ; check with 0; 0

Two recent measurements done with different techniques: GEM (COSY) p+d 3He+ M()=(547311 ± 28 ± 32) keV/c2

(missing mass technique) NA48 (CERN) -+p n+ M()=(547843 ± 30 ± 41) keV/c2

( 30 reconstruction)

8 discrepancy: M()=(532 ± 41 ± 52) keV/c2 (errors added in quadrature)


The mass is well in agreement with PDG value

M(M(00))KLOEKLOE = ( 134990 = ( 134990 6 6statstat 30 30syst syst ) keV) keV

M(0)PDG = ( 134976.6 0.6 ) keV

Preliminary results

The statistical uncertainty is ~negligible Systematic uncertainties from

knowledge of s and vertex position

(work in progress to reduce it)

PreliminaryPreliminary mass (MeV)

KLOE

NA48

GEMThe mass is in agreement with NA48 and in disagreement with GEM

M(M() = ( 547822 ) = ( 547822 5 5stat stat 69 69syst syst ) keV) keV


ee++ee-- cross-Section below 1 GeV cross-Section below 1 GeV


Motivation for (e+e Hadronic contribution aµ

hadr is limiting the standard model prediction for (g-2)µ !

ahad

1

4 3had (s) K(s) ds

4 m2

Experimental input into dispersion integral at low energies where pQCD is not applicable

Dominant channel below 1 GeV is e+e , which contributes with ca. 70% to the total value of aµ

had

(e+e needed with 1% precision!

aµhad is estimated by means of a

dispersion relation (intrinsically ~1/s2):


Modern particle factories, such as DANE are designed for a fixed center-of-mass energy: s = m = 1.02 GeV in the case of DANE Energy-scan not possible!

(e+e-+) with ISR:

Complementary approach: Consider events with Initial State Radiation (ISR)

S. Binner, J.H. Kühn, K. Melnikov, Phys.Lett. B459 (1999) 279

ISR

hadr d(e+ e- hadrons + ISR

) d

hadr

(e+ e- hadrons) H(hadr)

• Requires precise calculations of the radiator H• Requires precise understanding of effects from Final State radiation (FSR)

H. Czyz, A. Grzelinska, J.H. Kühn, G. Rodrigo, Eur. Phys. J. C33 (2004), 333

Pancheri, Shekhotsova, Venanzoni, Phys. Lett. B642, (2006) 342


First published result:

Acceptance 0.3%Trigger 0.3%Tracking 0.3%Vertex 0.3%Offline reconstruction filter

0.6%

Particle ID 0.1%Trackmass cut 0.2%Background 0.3%Unfolding effects 0.2%

Total experim. Syst. 0.9%Luminosity ( LA Bhabhas )

0.6%

Vacuum polarization 0.2%FSR corrections 0.3%Radiator function 0.5%

Total theoretical Error 0.9%

TOTAL ERROR KLOE 1.3% (CMD-2: 0.9%, SND 1.3%)

(e+e- ) nb

0.4 0.5 0.6 0.7 0.8 0.90.3

200

400

600

800

1000

1200

1400

M2 (GeV2)

KLOE2001 Data

140pb-1

Statistical error negligible (1.5 Million events)

Published Result: Phys. Lett. B606 (2005) 12

Contrib. to syst. error on ahad:


- Interference

Work in progress on d /dM2:

A new analysis is carried out at small photon angles using 2002 data (240pb-1) with improved machine background and calibration conditions. This alone should allow for a reduction of the total systematic error on to <1%.

In addition, one can extract e+e-by performing a normalization with muon events: )(

/

/)( s

sdd

sdds Born

obs

obsBorn

many effects cancel in the ratio:

• Vacuum Polarisation• Luminosity• Radiator function

Analysis with photons detected at large angle allows us to access the 2-pion-threshold region. Main limitation is caused by the contribution from model dependent effects of decays(f0 , ) and Final StateRadiation from pions.

Estimate these effects from MC:• PHOKHARA [EPJ C47(2006) 617]• Pancheri/Shekhovtsova/Venanzoni [PLB 642 (2006) 342]


Hadronic physics analyses at KLOE:

Dalitz plot analysis PLB 561(2003) 65

f0 f0 coupling to , , KK PLB 634(2006) 148

f0 BR() to 5% PLB 537(2002) 21

PDG06 Dalitz plot analysis, stat/syst improvements accepted by EPJ

Dependence of vis on √s Preliminary

BR(a0(980) ) to 10% PLB 536(2002) 209 stat/syst improvements Preliminary

' ( ) (' ( to 12%, mixing angle to 5% PLB 541(2002) 45 PDG06

stat/syst improvements Preliminary

mass measurement Preliminary

mass measurement, Dalitz plot analysis Preliminary

Dalitz plot analysis Preliminary

BR, m spectrum Preliminary

Upper Limit on BR at 10-5 PLB 606(2005) 276 PDG06

Upper Limit on BR at 10-5 PLB 591(2004) 49 PDG06

e+e- +- a|had (0.35 < s< 0.95 GeV2) to ~ 1% PLB 606(2005) 12 a|had down to threshold, normalization Preliminary

e+e- e+e- (+-) lept() to 1.5% and lepton universality test PLB 608(2005) 199

PDG06etc…


Kaon physics

Extraction of the Vus element of the CKM matrix from 5 semi-leptonic decays of neutral and charged kaons test of CKM UnitarityCKM Unitarity

CPT tests: first measurement of KS semi-leptonic asymmetry

Kaon interferometry in final states:

bounds on quantum coherencequantum coherence + + CPT violationCPT violation Reduced upper bound on KS CP violating decayCP violating decay

Precision measurement of KS ()/ KS

Measurement of KL and KS ChPT testChPT test

Measurement of KL and K± lifetime

Measurement of KL and K± main B.R.s

Of course, the main effort of the KLOE collaboration is onKaon physics:


Recent Kaon analyses:

KS KL Quantum Interference PLB 642 (2006) 315

CP and CPT violation Bell-Steinberger rel. + KLOE data Accepted by JHEP

KS UL on BR at 10-7 PLB 619 (2005) 61 PDG06

KS e BR to 1.3%, form factor slope, charge asymmetry PLB 636 (2006) 173

PDG06

KS to ~0.25%

Accepted by EPJC PDG06

KL l Absolute BR’s to ~ 0.5% PLB 632 (2006) 43

PDG06 KL lifetime from BR)=1

KL lifetime from KL to ~ 0.5% PLB 626 (2005) 15

PDG06

KL eForm factor slopes

PLB 636 (2006) 166 PDG06

KL eBR to ~ 2 %

Preliminary

KL BR to 1.1% PLB 638

(2006) 140 PDG06

KL to 1.1%

PLB 566 (2003) 61

K+ BR to 1.4% PLB 597 (2004) 139

K+ Absolute BR to ~ 0.27% PLB 632 (2006) 76 PDG06

K± l±Absolute BR’s to ~ 1.5% Preliminary

K± lifetime two independent measurements Preliminary

etc…


● Measurement of BR(KSBR(KSee● Improve on UL(KSUL(KSee● Improve on semileptonic BRs, lifetimes and form factors● BR(KL ) to few 10-3

● (K± e± )/(K± ) to few 10-2

● …

What's next?K

aon

ph

ysic

sK

aon

ph

ysic

s

2 fb-1

● Measurement of without resonant background from ● Determination of f0 and FSR parameters● (e+e-0) vs. s● Search for (600) with off-peak data using the reaction

Had

ron

ic p

hysic

sH

ad

ron

ic p

hysic

s

Off-peak data

● Combined fit of both charged and neutral final states

and searches for f0/a0KK ● Single and Double Dalitz decays, decays ● ...

2 fb-1


What's next? KLOE2

A new scheme to increase DANE luminosity by

a factor O(5) has been proposed by P.Raimondi

(crab waist collisions) – test in autumn 2007

If successful a new round of measurements with an improved KLOE detector could start in 2009

The KLOE detector has proven to well face the challenge,The KLOE detector has proven to well face the challenge,

nevertheless nevertheless something can be improvedsomething can be improved::

add an inner trackerinner tracker add a tagging systemtagging system for e+e- e+e- increase the EMC read-out granularityEMC read-out granularity update / upgrade the data acquisitionthe data acquisition


Time evolution of entangled kaon states, reach the sensitivity to

the Planck scale: tests of CPT-symmetry and quantum mechanics

e universality (K e / K ) and the mass of the muon

neutrino

universality of the weak coupling to leptons and quarks, CKM

matrix unitarity

rare KS decays (semileptonic charge asymmetry, KS , KS

)

light mesons: structure of scalars (via interaction), and ’

physics

(e+e- hadrons), muon anomaly, evolution of em

baryon electromagnetic form factors, e+e- pp, nn,

… and more

a new exciting challenge!a new exciting challenge!who wants to join us is who wants to join us is

welcome!!!welcome!!!

What's next? KLOE2

Documents

Talk outline