Prospects of KLOE-2 in hadron physics

1
Prospects of KLOE-2 in hadron physics
Pawel Moskal on
behalf of the KLOE-2 collaboration
2
KLOE-2 intends to
conduct investigations at the frontier of
particle and hadron physics searching for the
phenomena beyond the applicability of
Quantum Mechanics
and
Standard Model of Particle Physics
Since nothing is more pleasurable than to falsify
the theory !!
I thought the scientific theories were not the
digest of observation, but that they were
inventions-conjectures boldly put forward for
trial to be eliminated if they clashed with
observation
David Hume
3
e
e?
? ?
1.3
? ?
0.006

• ee? ????????s m? 1019.4 MeV

KLOE completed data taking in 2005 with 2.5
fb-1 corresponding to 8 109 ? , 108 ?
and 5 105 ?
4
KLOE K LOng Experiment
Drift chamber Gas 90 He 10 C4H10 dpt / pt lt
0.4 (?gt45) sxy 150 µm sz 2 mm
Electromagnetic calorimeter lead/scintillating
fibers 98 solid angle coverage s? / E 5.7 /
v(E(GeV)) st 57 ps / v(E(GeV))?100 ps PID
capabilities
5
The first run of the upgraded DAfNE was ended in
November 2009 Interaction region revised for the
compensation of the KLOE magnetic field Several
maintanance and upgrade works done to overcome
the collider limitations clearing electrodes
installed in the positron machines to prevent
electron-cloud formation LINAC new positron
gun , new accelaring section to be installed in
September Other elements modified wiggler,
kickers, control system, cryogenic plant,
scrapers
DAFNE luminosity upgrade

• New interaction scheme
• implemented large beam
• crossing angle sextupoles
• for crabbed waist optics
• Lnew 3 ? Lold
• ?Ldt 1 pb-1/hour
• Still space for improvements

New scheme
Old scheme
6
KLOE-2
STEP 0 2010-2011
The machine commissioning starts by the end
of June
KLOE ? KLOE-2
??
??
New Interaction Region
2.5 fb-1 5 fb-1
7
STEP 0 KLOE-2
LET E160-230 MeV
KLOE-2
Inside KLOE detector LYSOSiPM sElt10 for
Egt150 MeV
HET E gt 400 MeV
11 m from IP Scintillators PMTs
sE 2.5 MeV sT 200 ps
8
C-GEM
STEP 1 KLOE -2 2011
QCALT
1?0.3 ts equivalent to a factor of 3-4 in
statistics
New Interaction Region Inner Tracker
??
??
CCAL
KLOE KLOE-2

2.5 fb-1 Step 0 5 fb-1
Step 1 20 fb-1 Klong
Klong/Kshort/?,??
vs lt 1. GeV vs lt 2.4 GeV
9
Selected examples of investigations planned by
the KLOE-2
KLOE-2 Physics Programme arXiv1003.3868
EPJC (2010) in print

• Tests of descrete symmetries (CP, CPT, )
• Tests of quantum mechanics
• -time-evolution of the entangled pairs of
  neutral kaons
• -passive kaonic quantum eraser (unique at
  KLOE)
• Universality of the weak interaction of leptons
  and quarks
• Lepton universality
• Search for possible deviations from SM
  expectation of ?(K?e?)/?(K???) to 0.4 precision
• Investigations of the structure of the scalar
  mesons
• Gamma gamma interaction
• Study of the muon anomalous magnetic moment aµ
• and the evolution of the fine structure
  constant aem
• determination of the excitation function for
  the ee- ? hadrons
• Dark Matter search for narrow di-lepton
  resonances

10
Selected examples of investigations planned by
the KLOE-2
KLOE-2 Physics Programme
arXiv1003.3868 EPJC (2010) in print

• Tests of descrete symmetries (CP, CPT, )
• Tests of quantum mechanics
• -time-evolution of the entangled pairs of
  neutral kaons
• -passive kaonic quantum eraser (unique at
  KLOE)
• Universality of the weak interaction of leptons
  and quarks
• Lepton universality
• Search for possible deviations from SM
  expectation of ?(K?e?)/?(K???) to 0.4 precision
• Investigations of the structure of the scalar
  mesons
• Gamma gamma interaction
• Study of the muon anomalous magnetic moment aµ
• and the evolution of the fine structure
  constant aem
• determination of the excitation function for
  the ee- ? hadrons
• Dark Matter search for narrow di-lepton
  resonances

11
STEP 0 KLOE-2
12
(No Transcript)
13
?? - physics
KLOE-2 can improve fractional accuracy from 20
to 2
14
?? - interaction
15
(No Transcript)
16
(No Transcript)
17
KLOE-2 expectation Measuring ?' BRs with 1
accuracy
Run at ?s 1.2 GeV required
18
Selected examples of investigations planned by
the KLOE-2
KLOE-2 Physics Programme
arXiv1003.3868 EPJC (2010) in print

• Tests of descrete symmetries (CP, CPT, )
• Tests of quantum mechanics
• -time-evolution of the entangled pairs of
  neutral kaons
• -passive kaonic quantum eraser (unique at
  KLOE)
• Universality of the weak interaction of leptons
  and quarks
• Lepton universality
• Search for possible deviations from SM
  expectation of ?(K?e?)/?(K???) to 0.4 precision
• Investigations of the structure of the scalar
  mesons
• Gamma gamma interaction
• Study of the muon anomalous magnetic moment aµ
• and the evolution of the fine structure
  constant aem
• determination of the excitation function for
  the ee- ? hadrons
• Dark Matter search for narrow di-lepton
  resonances

19
Test of non-CKM CP Violation
ee- ? f ? ?? ???????-ee-
10-12
-10-15
10-3
CP conservation implies N(f) N(180 f)
13.6 2.5 (stat) 1.2 (syst) KTeV PRL 84
(2000) 408
20
ee- ? f ? ?? ???????-ee-
PL B675 (2009) 283
Theoretical predictions up to 2 and with
KLOE-2 0.8 precision is expected
21
Test of discrete symmetries with ? decays
? ? ??? ( C ) lt 1.6 x 10?5 at 90
CL (PLB 591, 49)
? ? ???? ( P , CP ) lt 1.3 x 10?5 at 90 CL
(PLB 606, 276)
KLOE has published the best limits based on a
statistics of 400 pb?1
At KLOE-2, these limits can be improved by
factor of 50. Existing new physics models allow
BRs only at the level of 10?12 ? 10?15
these will become the best limits on C and P
symmetries conservation in elementary particles
decays (see PDG08)
22
Tests of CPT symmetry
LORENTZ SYMMETRY, UNITARITY,
LOCALITY ?
C P T
G. Lüders, Ann. Phys. 2 (1957) 1. Ann. Phys. 281
(2000) 1004 Proof of the TCP theorem
23
Semileptonic decay identify strengeness content
thereforeAsymmetry of KS,L? ?e? signals a CP
violation
KS(t)gt e-?stKSgt KL(t)gt e-?LtKLgt KSgt
(1es)K0gt (1-es)K0gt KLgt (1eL)K0gt
(1-eL)K0gt
PL B636 (2008) 173 0.41 fb-1
24
Selected examples of investigations planned by
the KLOE-2
KLOE-2 Physics Programme
arXiv1003.3868 EPJC (2010) in print

• Tests of descrete symmetries (CP, CPT, )
• Tests of quantum mechanics
• -time-evolution of the entangled pairs of
  neutral kaons
• -passive kaonic quantum eraser (unique at
  KLOE)
• Universality of the weak interaction of leptons
  and quarks
• Lepton universality
• Search for possible deviations from SM
  expectation of ?(K?e?)/?(K???) to 0.4 precision
• Investigations of the structure of the scalar
  mesons
• Gamma gamma interaction
• Study of the muon anomalous magnetic moment aµ
• and the evolution of the fine structure
  constant aem
• determination of the excitation function for
  the ee- ? hadrons
• Dark Matter search for narrow di-lepton
  resonances

25
Kaon interferometry ? ?KSKL??????????
fJCP 1-- ee- ? f ?KS,pgtKL,-pgt
-KS,-pgtKL,pgt
?m?from here
I(?t) (a.u)?
Perfect vertex resolution
no simultaneous decays (?t0) in the same final
state due to the destructive quantum interference
?t/?S
26
Test of Quantum
Mechanics

• Di Domenico, 0904.1976
• and
• PL B642 (2006) 315

KLOE-2
st 0.9 ts ? st 0.3ts
L 2.5 fb-1 ? L 25 fb-1
27
Selected examples of investigations planned by
the KLOE-2
KLOE-2 Physics Programme
arXiv1003.3868 EPJC (2010) in print

• Tests of descrete symmetries (CP, CPT, )
• Tests of quantum mechanics
• -time-evolution of the entangled pairs of
  neutral kaons
• -passive kaonic quantum eraser (unique at
  KLOE)
• Universality of the weak interaction of leptons
  and quarks
• Lepton universality
• Search for possible deviations from SM
  expectation of ?(K?e?)/?(K???) to 0.4 precision
• Investigations of the structure of the scalar
  mesons
• Gamma gamma interaction
• Study of the muon anomalous magnetic moment aµ
• and the evolution of the fine structure
  constant aem
• determination of the excitation function for
  the ee- ? hadrons
• Dark Matter search for narrow di-lepton
  resonances

28
Thank You
29
(No Transcript)
30
KLOE-2 intends to
conduct investigations at the frontier of
particle and hadron physics searching for the
phenomena beyond the applicability of
Quantum Mechanics
and
Standard Model of Particle Physics
Since nothing is more pleasurable than to falsify
the theory !!
I thought the scientific theories were not the
digest of observation, but that they were
inventions-conjectures boldly put forward for
trial to be eliminated if they clashed with
observation
David Hume
31
Semileptonic decay identify strengeness content
thereforeAsymmetry of KS,L? ?e? signals a CP
violation


32
Kaon interferometry and
CPT tests
33
Kaon interferometry and tests of CPT
and Lorentz invariance
KLOE-2
st 0.9 ts ? st 0.3ts
L 2.5 fb-1 ? L 25 fb-1
34
izotropowosc predkosci swiatla
W celu wykrycia ruchu Ziemi wzgledem eteru w
1878 roku Maxwell zaproponowal doswiadczenie z
interferencja swiatla
A . A. Michelson,
Am. J. Sci. 22 (1881) 120.
?t 2?/c (? L1 - L2) ?t- 2?/c (L1 - ? L2)

?t ?t- ?t- 2?/c (? L1 - L2 -L1 ? L2)
k c ?t / ?
V_Ziemi 30 km/s ? 0.04 prazka dokladnosc
uzyskana wyniosla 0.01
k 0 dowodzi, ze predkosc swiatla jest
niezalezna od kierunku
35
nature of the scalar
mesons
Pseudoscalar multi-plet
Vector multi-plet
Scalar multi-plet s(500), k(700), f0(980),
a0(980)

• Is ?(600) the lightest scalar meson?
• Do ?, a0(980) and f0(980) belong to the
• same qq 3P0 nonet?
• If so, why is the mass spectrum inverted?
• qqqq states (Jaffe, Achasov et al., Maiani et
  al.)
• KK molecules (Weinstein-Isgur, Close et al.,
• 
  Kalashnikova et al.)

Provided s and k are there the scalars have
an Inverted Spectrum
36
nature of the scalar mesons
f0(980), a0(980), ?(500) through radiative
decays in pairs of pseudoscalars
f ? pp ?, f ? ??? ??, f ? K0K0?
37
(No Transcript)
38
nature of the scalar mesons
Parameter pipi-g pi0pi0g eta pi0g
MS (MeV) 983.7 984.7 1.9 mod 982.5 ? 1.6 1.1
gSKK (GeV) 4.74 3.97 0.43mod 2.15 ? 0.06 0.06
gSPP (GeV) -2.22 -1.82 0.19 mod 2.82 ? 0.03 0.04
g2SKK / g2SPP 4.6 4.8 0.6
39
Hadronic cross section measurement
The anomalous muon magnetic moment a? (g? -
2)/2 (116592080 60) 10-11 from E821 at
BNL theory a? a?QED ?a??weak?
a?had a?had from measurements of the hadronic
cross section via dispersion relation
KLOE-2 1
40
Hadronic cross section measurement
The anomalous muon magnetic moment a? (g? -
2)/2 (116592080 60) 10-11 from E821 at
BNL theory a? a?QED ?a??weak?
a?had a?had from measurements of the hadronic
cross section via dispersion relation
KLOE-2 1
41
Test of Lepton Universality
R ?(K ? e ?) / ?(K ? ? ? )
Standard Model Prediction R (2.477 0.001) x
10?5 Cirgiliano, Rosell PRL 99 (2007) 231801
(ChPT with precision 0.04 )
Data precision improved from 6 to 1 by KLOE
EPJ C64 (2009) 627
First studies have started with present KLOE data
set need to fully exploit calorimeter for e/?
separation Efficiency will improve
with the inner tracker insertion
A reasonable guess, based on present detector,
is that with 25 fb-1 ? 0.4 precision
can be reached
KLOE-2
NA48/2 Preliminary 05 R (2.416 0.049)
x 10?5
NA48/2 can reach 1 precision with present data
42
Vus from KLOE
Universality of the weak interaction

• gt

plot F.Mescia courtesy
ltVusf(0)gt KLOE AV. 0.2157(6) ( 0.28 rel.)
ltVusf(0)gt WORLD AV. 0.2166(5) ( 0.23 rel.)
CKM unitarity within 1?
Lattice QCD KLOE-2 gt level of 0.02
43
Passive quantum eraser unique at KLOE
K0 K0 oscillates via KS KL
strangeness
Kshort
e-
?
?-
???
??
44
Passive quantum eraser unique at KLOE
45
Passive quantum eraser unique at KLOE
46
Dark Matter search

• Recent unexpected astrophysical observations
  (PAMELA, ATIC, INTEGRAL, DAMA/LIBRA) can be
  interpreted by assuming the existence of a low
  mass O(1 GeV) dark matter sector that interacts
  with SM particles through a mixing of a new gauge
  field, U, with hypercharge
• Possible signatures
• if mUlt M? ? ee??U??ll?? ? resonances in ll?
  invariant mass
• if there is a Higgs-like particle (h') in the
  dark sector, with mh'lt M?
• higgs-strahlung ee??U?Uh', with U?ll?
  
• two leptons missing energy (h' undetected)
• if mhlt2 mU ? multilepton events
• If mixing parameter k ? 10-2 10-3 ? ? 1 pb
• (observable at
  KLOE-2)

Essig et al., arXiv0903.3941
47
Ks tagging a unique feature at KLOE
ee- ? f ?KS,pgtKL,-pgt -KS,-pgtKL,pgt f
JCP 1--
KLOE tS 89.56 0.03 0.07 ps ( 0.1)
SETP0 KLOE-2 5 fb-1 ( 0.03 )
48
KS ? 3?0
CP violation direct search

• SM ?(KS?3?0) ?(KL?3?0) ?0002 ?
  BR(KS?3?0) 2?10-9
• 450 pb-1 6 ? events tag by KL
  interaction in the EmC
• Background KS? 2?0 2 split /
  accidental clusters in the EmC

• Nbkg(MC) 3.13 0.90
• BR(KS?3?0) lt 1.2 10?7 _at_ 90 CL
• ( BR lt 1.4 10?5 _at_ 90 CL SND 99
• BR lt 7.4 ? 10?7 interference, NA48, 04 )

KLOE-2 with 25 fb-1 and inner
tracker can reduce the upper limit by factor
of about 50 perhaps observe a
signal for a first time?
49
Asymmetry of KS,L? ?e?signals a CP violation
KLOE-2 will reduce the uncertainty by a factor
of 3.
50
Future prospects - KLOE2
KLOE-2
51
(No Transcript)
52
Kaon interferometry ? ?KSKL??????????
f JCP 1-- hence f ?KS,pgtKL,-pgt
-KS,-pgtKL,pgt
?m?from here
I(?t) (a.u)?
Perfect vertex resolution
no simultaneous decays (?t0) in the same final
state due to the destructive quantum interference
?t/?S
53
ee- ? f ?KS,pgtKL,-pgt -KS,-pgtKL,pgt f
JCP 1--
KS(t)gt e-?stKSgt KL(t)gt e-?LtKLgt KSgt
(1es)K0gt (1-es)K0gt KLgt (1eL)K0gt
(1-eL)K0gt
KS(t)gt e-?stKSgt KL(t)gt e-?LtKLgt KSgt
(1es)K0gt (1-es)K0gt
54
Semileptonic decay identify strengeness content
thereforeAsymmetry of KS,L? ?e? signals a CP
violation


PL B636 (2008) 173 0.41 fb-1