1)Short range future 2)Medium range future B factories? 3)Long range future ILC? INFN – LNF will...

1) Short range future

2) Medium range future B factories?

3) Long range future ILC?

INFN – LNF will be part of the international effort on future accelerators

INFN National Laboratory LNF

Some basic concepts (and numbers)

A meson decaying at rest produces pairs of neutral or charged kaons with branching ratios of ~34% and

~49%,respectively

Daughter particles are monochromatic,

Pch ~ 125 MeV/c, Pneu ~ 110 MeV/c

In resonant e+e collisions, particles fluxes are:

1.5 x 106 K± pairs/pb1

1. x 106 KS KL pairs/pb1

Parity conservation imposes the neutral state to be KSKL

100 fb-1 about 10 10 Kaon pairs

K and factory

FRASCATI Short Range Future; 3 years

DAFNE Luminosity projection

Starting from 1.5*10^32, 2fb-1/year1) Ion Cleaning Electrodes shield-removal2) Higher positron current3) New interaction region4) wigglers linearization5) Transfer lines upgrade (continuos injection)

To be discussed:1)Crab cavities 2) Waist modulation (RF quads)

Final luminosity 3 times higher? Cutting edge accelerator technology

FRASCATI Less short Range Future 2010

Change of machine layout, insertion of

Superconducting cavities Superconducting wigglers Ramping Dipoles New vacuum chamber

Energy (cm) (GeV) 1.02 2.4

Integrated Luminosity per year (fbarn-1) >10

Total integrated luminosity (5 years, fbarn-1)>50 >3

Peak luminosity > (cm-1sec-2) >8 1032 >1032

DANE 2 layout

IR

Wigglers

rf

TDR in preparation: necessary to submit the project

PHYSICS case• K physics (from 2fb-1 to 50fb-1)• Nuclear physics• Nucleon form factors • Kaonic nuclei• Total cross section• physics• QM with kaon interferometry• Test of ChPT• Intense I.R Synchrotron Light Source

Conceptual Design Report of the accelerator end 2006

Preliminary Letter of Intent for experiments are in preparation. We need to have an international collaboration.

Experiment Letter of Intent end 2006

We ask for the INFN decision By the end 2006

International collaboration on the machine design is highly desirable

Feasibility study of hyper B-factory and synergy with ILC

CTF3 at CERN going on

Participation to the R&D for the ILC. Member of the GDE team

Construction FEL injector systems

It is important to have local laboratories working, in collaboration, on several projects

It is wrong (to my opinion) to concentrate all our resources on a single project

TOTAL CROSS SECTION R

Radiativereturn

Energy Scan

a = (116592080 ± 50stat ± 40sys) × 10-11

had(5) (Mz

2) =

0.02800 (70) Eidelman, Jegerlehner’95

0.02761 (36) Burkhardt, Pietrzyk 2001

0.02755 (23) Hagivara et al., 2004

0.02758 (35) Burkhardt, Pietrzyk 6-05

R a

R (5)had

1) Total cross section from threshold to 2.5 GeV: scan in √s e/o ritorno radiativo

Hadronic correction to g-2 , running of

2) Spectroscopy (vector mesons)3) physics:

Pseudoscalars , , ’ Scalars (,…) , , KK

4) Time-like form factors: Barioni: n , p , , Mesoni , K

5) Test of CP + QM

6) Radiative decays Mixing / ’ e ’ decays scalar meson : f0(980), a0(980),

7) KN physics

Dafne2 Physics (non K)

F. Bossi, CSN1, Frascati 14 Ottobre 2005

CPT violation: the “standard” path

In the standard description of the neutral K system, a charge asymmetry in semileptonic KL and KS decays is predicted due to

CP and (possibly) CPT violation

L = 2Re(K )

S = 2Re(K ) +

CPT is violated ifS ≠ L

The most recent measurement are:

S = (1.5 ± 10 ± 3) x 103 KLOE, ~400 pb1

DAFNE-2 10-4

L = (3322 ± 58 ± 47) x 106 KTeV, 02


CPT and decoherence

It has been suggested that quantum gravity could give rise to modification of standard QM, observed in decoherence effects

together with CPT violation

This can be observed in deviation of the behaviour of entagled systems (like KSKL from decays) from the one predicted by

standard QM


CPT and decoherence: the EHNS model

Ellis, Hagelin, Nanopoulos and (independently) Srednicki set up an evolution equation of the neutral K system containing three new

CPT violating parameters ,, with dimensions of energy

Naively, one expects ,, ~ O(MK2 / MPlank) ~ 10-20 GeV

Peskin and Huet worked out the expression of the usual double decay intensity of the KSKL pair from decays in the EHNS

framework

There appear new bizarre terms in the distribution which allow to extract experimentally limits (or measurements) of these new

parameters by proper fitting

Fixing the EHNS parameters

The EHNS parameters have already been constrained by CPLEAR results

= ( 0.5 ± 2.8) x 1017 GeV

= ( 2.5 ± 2.3) x 1019 GeV

= ( 1.1 ± 2.5) x 1021 GeV

KLOE can reach equal sensitivity on , with present data sample

just with the ++ channel


(/S) (/S) (/S)

fb1 fb1 fb1

• Present KLOE

• KLOE + VDET

Fixing the EHNS parameters

With 20 fb1 one can dramatically improve, especially on and

In the plots below the horizontal line is CPLEAR, VDET means vert = ¼ S


CPT and Bose statistics: the BMP model

Bernabeu, Mavromatos and Pavassiliou argued that in presence of CPT violation induced by quantum gravity the concept of

antiparticle has to be modified.

In this case the KSKL state from decays does not strictly obey Bose statistics, thus modifying the final state wave function

І i > = C {( І KS(+)> І KL()> І KL(+)>І KS()>) + ( І KS(+)> І KS()> І KL(+)>І KL()>)}

The complex parameter quantifies the departure from Bose statistics, in a formalism in which the time evolution of the state

is still described by the equations of standard QM


Naively, ІІ ~ O(MK2 / MPlank )1/2 ~ 10-3 104

Measuring the parameter


The parameter can be measured by a fit to the decay time distribution of the KSKL pair to ++

Arg() = 0,

ІІ = 1,2,3 x 103

t (S units)

fb1

• Present KLOE• KLOE + VDET

A. Di Domenico

A. Di Domenico

time-like form factors

p 1.876

n 1.879

2.231 N(p- , n0)

2.378 N(p0 , n+)

2.385

2.395 N(n-)

2.464 N

2.630 0

2.643 -

(1)Misura sezione d’urto e+e- NN |G|2

22

22 2

3

4sG

s

MsG

s E

N

M

22

222

2

sin4

cos14

sGs

MsG

s

C

d

dE

NM

(2) Angular distribution of theoutgoing nucleon |GE|/|GM|

Accessible nucleons:

(3) Measurement of the outgoingnucleon polarization (q2) =E - M


NA48/1 has measured BR(KS ) = (2.78 ±0.06±0.04)x106

This result differs from predictions of ChPT at O(p4) by 30%

A preliminary analysis shows that KLOE can reach a statistical accuracy of ~ 4% with the present data sample.

A projection to 20 fb1 would give an accuracy better than 1%

KS : a test for ChPT

Lepton Flavour Universality K e / K from 0.01 to 0.001

K will giveVus/Vud to 0.001

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

Transfer Lines Upgrade

Motivation:e+ e- continous injection in collision

kicker

e- line

e+ line

N-NEnergy per beam E GeV 0.51 1.2

Circumference C m 100 100

Luminosity L cm-2 sec-1 8 1032 1032

Current per beam I A 2.5 0.5

N of bunches Nb 150 30

Particles per bunch N 1010 3.1 3.4

Emittance mm mrad 0.3 0.6

Horizontal beta* x m 1 1

Vertical beta* y cm 1 1.5

Bunch length L cm 1 2

Coupling % 1 1

Energy lost per turn Uo (keV) 25 189

H damping time x (msec) 13 5

Beam Power Pw (kW) 62 (55w + 7d) 94.6 (42w + 53d)

Power per meter Pw/m (kW/m) 8.6w + 0.5d 8.4w + 3.8d

RF system

A possible candidate cavity

500 MHz SC cavity operating at KEKB

R&D on SC cavities with SRFF experiment in DAFNE

SC wigglers

Technology developed for Light sources and colliders

ELETTRA SC wigglerBuilt by BINP in operation since 2003

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