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Paweł Moskal on behalf of the KLOE-2 collaboration
Prospects of KLOE-2 in hadron physics
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 trialto be eliminated if they clashed with observation … David Hume
DANE e+e- collider Frascati (Rome)
• e+e s ~ m = 1019.4 MeV
e
e+
DeteDetecctor KLOEtor KLOE
γ
’ γ
1.3 %
0.006%
KLOEKLOE completed data taking in 2005 with 2.5 fb completed data taking in 2005 with 2.5 fb-1-1
corresponding to ~ 8 ∙ 10corresponding to ~ 8 ∙ 1099 , ~ 10 , ~ 1088 and ~ 5 ∙ 10~ 5 ∙ 1055 ’
KLOE K LOng Experiment
e+ e-
Drift chamberGas: 90% He + 10% C4H10
δpt / pt < 0.4% (θ>45°)σxy ≈ 150 μm ; σz ≈ 2 mm
Electromagnetic calorimeterlead/scintillating fibers98% solid angle coverageσΕ / E = 5.7% / √(E(GeV))σt = 57 ps / √(E(GeV)) 100 ps⊕PID capabilities
5
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
DAFNE luminosity upgrade
KLOE-2
New Interaction Region KLOE KLOE-2 2.5 fb-1 5 fb-1
γγ γγ
STEP 0 2010-2011 The machine commissioning starts by the end of June
- interaction:
e+e- → e+e- * * → e+e- + X
STEP 0 KLOE-2
LET: E=160-230 MeV Inside KLOE detector
LYSO+SiPM
E<10% for E>150 MeV
HET: E > 400 MeV
11 m from IP
Scintillators + PMTs
MeV
T ~ 200 ps
KLOE-2
STEP 1 KLOE -2 2011
New Interaction Region + Inner Tracker
KLOE KLOE-2 2.5 fb-1 Step 0: 5 fb-1
Step 1: 20 fb-1
Klong Klong/Kshort/η,η΄
γγ γγ 10.3 s equivalent to a factor of 3-4 in statistics
C-GEM
QCALT
CCAL
• 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 αµ
and the evolution of the fine structure constant αem
determination of the excitation function for the e+e- → hadrons • Dark Matter : search for narrow di-lepton resonances
Selected examples of investigations planned by the KLOE-2
KLOE-2 Physics Programme arXiv:1003.3868 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 αµ
and the evolution of the fine structure constant αem
determination of the excitation function for the e+e- → hadrons • Dark Matter : search for narrow di-lepton resonances
Selected examples of investigations planned by the KLOE-2
KLOE-2 Physics Programme arXiv:1003.3868 EPJC (2010) in print
- interaction: e+e- → e+e- * * → e+e- + X
Lint = 1 fb-1
( → X)= Lint
dNX
dW
dLdW
STEP 0 KLOE-2
- physics:
KLOE-2 can improve fractional accuracy from 20% to 2%
- interaction:
Run at s ≥ 1.2 GeV required
KLOE-2 expectation Measuring η′ BRs with 1% accuracy
• 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 αµ
and the evolution of the fine structure constant αem
determination of the excitation function for the e+e- → hadrons • Dark Matter : search for narrow di-lepton resonances
Selected examples of investigations planned by the KLOE-2
KLOE-2 Physics Programme arXiv:1003.3868 EPJC (2010) in print
Test of non-CKM CP Violation
CP conservation implies N(φ) = N(180 – φ)
13.6 ± 2.5 (stat) ± 1.2 (syst)%KTeV PRL 84 (2000) 408
e+e- φ γ -e+e-
10-3 10-12-10-15
e+e- φ γ -e+e-
PL B675 (2009) 283
Theoretical predictions up to 2% and with KLOE-2 0.8 % precision is expected
Test of discrete symmetries with decays
→ γ ( C ) < 1.6 x 105 at 90% CL (PLB 591, 49)
→ ( P , CP ) < 1.3 x 105 at 90% CL (PLB 606, 276)
At KLOE-2, these limits can be improved by factor of 50.
Existing new physics models allow
BR’s only at the level of ~ 1012 1015
these will become the best limits on C and P symmetries conservation in elementary particle’s decays (see PDG08)
KLOE has published the best limits based on a statistics of ~ 400 pb1:
LORENTZ SYMMETRY, UNITARITY, LOCALITY C P T
G. Lüders, Ann. Phys. 2 (1957) 1.; Ann. Phys. 281 (2000) 1004 „Proof of the TCP theorem”
Tests of CPT symmetry
Semileptonic decay identify strengeness content therefore
Asymmetry of KS,L e signals a CP violation
3
SS
SSS 102.9)9.6(1.5
)νπΓ(Kν)πΓ(K
)νπΓ(Kν)πΓ(KA
ee
ee
AS AL 0 implies CPT violation
PL B636 (2008) 1730.41 fb-1
|KS(t)> = e-λst|KS>|KL(t)> = e-λLt|KL>
|KS> ≈ (1+εs)|K0> + (1-εs)|K0>|KL> ≈ (1+εL)|K0> + (1-εL)|K0>
• 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 αµ
and the evolution of the fine structure constant αem
determination of the excitation function for the e+e- → hadrons • Dark Matter : search for narrow di-lepton resonances
Selected examples of investigations planned by the KLOE-2
KLOE-2 Physics Programme arXiv:1003.3868 EPJC (2010) in print
φ:JCP = 1-- e+e- φ |KS,p>|KL,-p> -|KS,-p>|KL,p>
no simultaneous decays (t=0) in the samefinal state due to thedestructive quantum interference
t/S
I(t
) (a
.u) mfrom
here
cos2;, 2/ tmeeetI ttt LSSL
Kaon interferometry:Kaon interferometry: KKSSKKLL
t2 t1
t=t1-t2
Perfect vertex resolution
cos)1(2;, 2/ tmeeetI ttt LSSL
Test of Quantum Mechanics
KLOE-2 σt ~ 0.9 τs → σt ~0.3τsL = 2.5 fb-1 → L = 25
fb-1
A. Di Domenico, 0904.1976andPL B642 (2006) 315
• 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 αµ
and the evolution of the fine structure constant αem
determination of the excitation function for the e+e- → hadrons • Dark Matter : search for narrow di-lepton resonances
Selected examples of investigations planned by the KLOE-2
KLOE-2 Physics Programme arXiv:1003.3868 EPJC (2010) in print
Thank You
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 trialto be eliminated if they clashed with observation … David Hume
=
=
Semileptonic decay identify strengeness content therefore
Asymmetry of KS,L e signals a CP violation
3
SS
SSS 102.9)9.6(1.5
)νπΓ(Kν)πΓ(K
)νπΓ(Kν)πΓ(KA
ee
ee
AS AL 0 implies CPT violation
Kaon interferometry and CPT tests
KLOE-2 σt ~ 0.9 τs → σt ~0.3τs
Kaon interferometry and tests of CPT and Lorentz invariance
izotropowość prędkości światła W celu wykrycia ruchu Ziemi względem eteru w 1878 roku Maxwell zaproponował doświadczenie z interferencją światła A . A. Michelson, Am. J. Sci. 22 (1881) 120.
Δt = Δt║- Δt┴= 2γ/c (γ L1 - L2 -L1 + γ L2) k = c Δt / λ
k = 0 dowodzi, że prędkość światła jest niezależna od kierunku
Δt║ = 2γ/c (γ L1 - L2)
Δt┴ = 2γ/c (L1 - γ L2)
V_Ziemi 30 km/s 0.04 prążka dokładność uzyskana wyniosła 0.01
Pseudoscalar multi-plet Vector multi-plet
Scalar multi-plet:(500), (700), f0(980), a0(980) • Is (600) the lightest scalar meson?
• Do , a0(980) and f0(980) belong to the
same qqqq 3P0 nonet?
• If so, why is the mass spectrum inverted?
qqqqqq states (Jaffe, Achasov et al., Maiani et al.)
KKKK molecules (Weinstein-Isgur, Close et al.,
Kalashnikova et al.)
nature of the scalar mesons
nature of the scalar mesons
f0(980), a0(980), (500) through radiative decays in pairs of pseudoscalars
φ , φ , φ K0K0
Parameter
S (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 0.03 ± 0.04
g2SKK / g2
SPP ~4.6 ~4.8 ~0.6
nature of the scalar mesons
Hadronic cross section measurementThe anomalous muon magnetic momenta = (g - 2)/2 = (116592080 ± 60) 10-11 from E821 at BNLtheory : a = a
QED + aweak
+ ahad
ahad from measurements of the hadronic
cross section via dispersion relation
KLOE-2
1%
Hadronic cross section measurementThe anomalous muon magnetic momenta = (g - 2)/2 = (116592080 ± 60) 10-11 from E821 at BNLtheory : a = a
QED + aweak
+ ahad
ahad from measurements of the hadronic
cross section via dispersion relation
KLOE-2
1%
R = (K± e± ) / (K± ± )
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
Test of Lepton Universality
Standard Model Prediction: R = (2.477 ±0.001) x 105
Cirgiliano, Rosell PRL 99 (2007) 231801 (ChPT with precision 0.04 %)
KLOE-2
Data precision improved from 6% to 1% by KLOE EPJ C64 (2009) 627
• f+(0)=0.961(8) Leutwyler and Roos
[ZPC25, 91(1984)]
• Vud=0.97377(27) Marciano and Sirlin
[PRL96 032002(2006)]
Unitarity band
Vus×f+(0) = 0.2187(22)
|Vus| from KLOE >
<Vus×f+(0)> KLOE AV. = 0.2157(6) ( 0.28% rel.)
<Vus×f+(0)> WORLD AV. = 0.2166(5) ( 0.23% rel.)
plot: F
.Mescia cou
rtesy
CKM unitarity within ~ 1
Lattice QCD + KLOE-2 => level of ~0.02%
Universality of the weak interaction
Passive quantum eraser; unique at KLOE
-
e-ν
strangeness Kshort
K0 K0 oscillates via KS KL
Passive quantum eraser; unique at KLOE
Passive quantum eraser; unique at KLOE
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 mU< M e+eUℓ+ℓ resonances in ℓ+ℓ invariant mass
– if there is a Higgs-like particle (h') in the dark sector, with mh'< M
higgs’-strahlung e+eU*Uh', with Uℓ+ℓ
two leptons + missing energy (h' undetected)
– if mh‘<2 mU multilepton events
• If mixing parameter k 10-2 – 10-3 ~ 1 pb
(observable at KLOE-2)
[Essig et al., arXiv:0903.3941]
Ks tagging a unique feature at KLOE
e+e- φ |KS,p>|KL,-p> -|KS,-p>|KL,p>
φ: JCP = 1--
KLOE: τS = 89.56 ± 0.03 ± 0.07 ps ( ~0.1%)
KS 30 SM (KS30) = (KL30) |000|2 BR(KS30) ~ 210-9
450 pb-1; 6 events tag by KL interaction in the EmC
Background: KS 20 + 2 split / accidental clusters in the EmC
Nbkg(MC) = 3.13 ± 0.90
BR(KS30) < 1.2 × 107 @ 90% CL
( BR < 1.4 × 105 @ 90% CL [SND ’99]
BR < 7.4 107 [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?
CP violation: direct search
(KS,L -e+) (KS,L +e-)
(KS,L -e+) (KS,L +e-)
_
_AS,L =
Asymmetry of KS,L esignals a CP violation
3-
LS
SL 101.8)3.1(-0.5 1τνπKBR
τνπKBR
4
1Re
e
ex
• Test of S=Q (CPT conserv. ampl.) (BR(KLe) and L from KLOE and S from PDG)
(CPLEAR = 6.110-3)
(SM expect. O(10-7))
AS AL 0 implies CPT violation
KLOE-2 will reduce the uncertainty by a factor of 3.
3
SS
SSS 102.9)9.6(1.5
)νπΓ(Kν)πΓ(K
)νπΓ(Kν)πΓ(KA
ee
ee
Future prospects - KLOE2 - physics: e+e- → e+e- * * → e+e- + X
Lint = 1 fb-1
( → X)= Lint
dNX
dW
dLdW KLOE-2
no simultaneous decays (t=0) in the samefinal state due to thedestructive quantum interference
t/S
I(t
) (a
.u) mfrom
here
cos2;, 2/ tmeeetI ttt LSSL
Kaon interferometry:Kaon interferometry: KKSSKKLL
t2 t1
t=t1-t2
Perfect vertex resolution
φ: JCP = 1-- hence φ |KS,p>|KL,-p> -|KS,-p>|KL,p> cos)1(2;, 2/ tmeeetI ttt LSSL
e+e- φ |KS,p>|KL,-p> -|KS,-p>|KL,p>
φ: JCP = 1--|KS(t)> = e-λst|KS>|KL(t)> = e-λLt|KL>
|KS> ≈ (1+εs)|K0> + (1-εs)|K0>
|KS(t)> = e-λst|KS>|KL(t)> = e-λLt|KL>
|KS> ≈ (1+εs)|K0> + (1-εs)|K0>|KL> ≈ (1+εL)|K0> + (1-εL)|K0>
=
=
Semileptonic decay identify strengeness content therefore
Asymmetry of KS,L e signals a CP violation
3
SS
SSS 102.9)9.6(1.5
)νπΓ(Kν)πΓ(K
)νπΓ(Kν)πΓ(KA
ee
ee
AS AL 0 implies CPT violation
PL B636 (2008) 1730.41 fb-1