1. Physics at a high luminosity -factory
F. Bossi, LNF-INFN

2. KLOE and DANE: the past and the present
In the past years the history of DANE and KLOE has been increasingly successful
The luminosity delivered by the machine has been increasing almost linearly along years
KLOE has proven to be a perfect detector to study a wide variety of physics topics, spanning from charged and neutral K decays, to low-energy hadron spectroscopy, to quantum interferometry measurements
KLOE results have become matter of attention and debate in (at least) two different very lively communities: the flavour and the hadron physics communities

3. In the last 3 months of 2005 ∫L dt > 190 pb1
DANE Performance
KLOE monthly acquired luminosity
In the last 3 months of ∫L dt > 190 pb1
pb1/month
2000
2001
2002
2004
2005
From we have acquired ~ 2500 pb1 of data
The present FINUDA run confirms that DANE can today routinely deliver ~ 8 pb1/day

4. The beauty (without Beauty) of DANE
The study of KL decays has been the driving force in the design and operation of KLOE. However DANE has proven to be almost without competitors under many other respects.
KS decays: 3x108 tagged KS mesons delivered / fb1
No way to obtain the same purity at any hadron machine: some decays can be studied only here.
Quantum interferometry
KLOE reached the highest sensitivity on QM violating effects
 decays: 4x107  mesons delivered / fb1
KLOE has already now the largest sample of  mesons collected to date.

5. The KLOE2 project
While still producing physics results based on the data acquired so far (many of which you have seen at this Conference) we are preparing for a new data taking with an upgraded detector (KLOE2) at an improved machine able to deliver 510 fb1/year at the  peak
Physics motivations are strong: an increase in statistics of this order of magnitude would represent a clear step forward in the understanding of many physics topics already studied at KLOE
The experience we have acquired along years is quite solid. All of the evaluations about physics potentials that I’ll show, are based on the best Monte Carlo one can imagine: real data

6. We plan to be ready for a new run sometimes during 2009
KLOE2 at DANE2
We rely on the hypothesis that the new “crab waist” scheme (see P. Raimondi’s talk) will enhance the luminosity of DANE by a considerable factor without increasing backgrounds
In the meantime we are working to maintain and upgrade KLOE in order to cope with the new machine design
Moreover we are studying some detector upgrades to improve its performance on some specific physics channel. In particular we are planning the insertion of an inner tracker detector to improve on vertex reconstruction and increase acceptance on charged KS, K± and  decays
We plan to be ready for a new run sometimes during 2009

7. Physics topics at KLOE-2
At Ecm = M :
Tests of discrete symmetries conservation (C, P, CP, CPT)
Tests of predictions of Standard Model and NP models
Studies on Low Energy QCD
Studies on the Nature of Scalar Mesons
At 1 < Ecm (GeV) < 2.4 :
Determination of hadronic contribution to em
Studies of Vector Meson Spectroscopy
In the remaining trasparencies i will not discuss the “high energy” option but i will concentrate on the first two points of the list above

8. CPT and QM tests
At this Conference we have had a full session devoted to CPT and QM tests. This because:
CPT conservation is a theorem in quantum field theory, thus needs to be extensively tested
In this field we have predictions (as qualitative as they can be) of quantum gravity inspired models (see N. Mavromatos’s talk at this Conference)
1fb-1
KLOE has already produced many competitive results on these issues, mostly based on the study of correlated kaon decays (see M. Testa’s talk at this Conference)

9. Measurement of the EHNS parameters
d(a/DG)
d(b/DG)
d(g/DG)
int. lum. (fb-1)
At KLOE2 the previous results can be dramatically improved, thanks to the higher statistical sensitivity and the proposed detector upgrades
CPLEAR limit
Plank scale
Present KLOE
KLOE with Inner Tracker

10. Test of discrete symmetries with  decays
KLOE has published the best limits on two decay channels forbidden by discrete symmetries conservation, based on a statistics of ~ 400 pb1:
→ (C) <1.6 x 105 at 90% CL (PLB 591, 49)
→+ (P,CP) <1.3 x 105 at 90% CL (PLB 606, 276)
At KLOE-2, previous limits can be improved by ~ 2 o.o.m. Although existing new physics models allow BR’s only at the level of ~ 1012  1015 , these will become the best limits on C and P symmetries conservation in elementary particle’s decays (see PDG06)

11. Test of Unitarity of CKM matrix
As we have extensively seen at this Conference, the test of unitarity of the first row of CKM is still limited by the theoretical uncertainty on |Vus| (in particular on fK(0))
However recent progress in LQCD let us realistically hope for an evaluation of fK at the 0.1% level
KLOE-2 will be able to reach such a precision on all of the experimental inputs required for this determination

12. En passant we note that it tests also CPT through charge asymmetry
KS  e decays
As an example let me take the measurement of the KS semileptonic branching ratio
This is the “golden” decay for KLOE. It has been measured with a ~1.2% precision with 400 pb1
En passant we note that it tests also CPT through charge asymmetry
The advantage is that KS lifetime is known already with a precision better than 0.1% thanks to NA48 and KTeV
At KLOE-2 BR(KS →e) can be measured at 0.2% level

13. Test of Lepton Universality
The relevance of precisely measuring Ke2 decays in extended LFV SUSY models has been extensively underlined at this Conference
DATA
A preliminary KLOE analysis has shown that KLOE could aim at reaching a sensitivity of ~ 1% on these transitions (see A. Sibidanov’s talk at this Conference)
FIT
BKG
At KLOE-2 sensitivity will reach ~ 0.3% or better
Inner tracker could be beneficial for recovering early decays

14. Conclusions
We plan to start a new data taking campaign with KLOE on the proposed high luminosity DANE, as early as 2009
The physics program is rich and exciting
The expertise we have acquired in running both machine and detector is solid
We have proposed minimal detector upgrades to improve its performance without modifying its overall architecture
Costing profile is kept under control and well whithin the potentials of INFN

15. SPARE SLIDES

16. f KSKLp+p- p+p- Black hist. : s(Dt)~1tS =>6mm
Red hist: s(Dt)~1/4 tS =>1.5mm
Blue curve: ideal
From now on VDET means:
s(Dt)~1/4 tS

17. • present KLOE • KLOE + VDET -- Planck scale region
f KSKLp+p- p+p- : decoherence & CPTV by QG
• present KLOE
• KLOE + VDET
-- Planck scale region
int. lum. (fb-1)
d(Re w)

18. Angular asymmetry in  →+e+e decays
An angular asymmetry between the production planes of the  and ee pairs, ACP can be induced by some unconventional CP violating mechanism described by a 4-quark operator of the type TxV
In the Standard Model ACP must be < 104 ( or lower, depending on B(→+), see previous slide!)
In the models above, it can be as large as 102 !
A measurement based on ~ 104 observed signal events becomes extremely interesting
At KLOE-2 one can hope to observe 3-5 x 104 such events!

19. Inner Tracker: the C-GEM project
A new tracking detector, filling the empty zone between the beam pipe and the inner wall of the DC, is required to improve vertex reconstruction, needed especially for interferometry studies and to increase acceptance for several interesting decay channels
10 cm
30 cm
25 cm
DC wall
Quads
Not to scale
The proposed detector is based on a novel technology: the cylindrical-GEM, which requires some R&D work to be performed prior the construction of the final detector