Morimitsu Tanimoto - Startseite · 2017. 11. 21. · K. Hara KEK-ph 2013 March 6. D0 Anomaly. CP...
Transcript of Morimitsu Tanimoto - Startseite · 2017. 11. 21. · K. Hara KEK-ph 2013 March 6. D0 Anomaly. CP...
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Morimitsu Tanimoto
Niigata University, JAPAN
March 20 2013 @ MPIK Heidelberg
Collaborated with Yusuke Shimizu and Kei Yamamoto
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Plan of My talk
1Brief Review of CP Violation
2Experimental Status
3 Sbottom-Quark Mixing
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SM explains successfully CP violation of K and Bd mesons. Triumph of Kobayashi-Maskawa model
1 Probing New Physics in B mesons
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CP violation for beginner
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,
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Direct CP Violation
Tree Diagram in SM
CP asymmetry
Penguin Diagram in SM
Decay Amplitudes
- Ratio of Penguin and Tree
-strong phase shift -weak CP phase,
- Tree -Penguin,
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CP Violation in Mixing
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Bd and Bs non-leptonic decays
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Golden Mode in CP violation of B meson
New Physics ?
Standard Model
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Experiment
CP Violation !
Time-dependent Asymmetry
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However,
there is still possibility to find New Physics in the CP violation phenomena (especially in Bs system) !
TeV Scale Physics in LHC Era!
Precise measurement of CP violation in B mesons !
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The dispersive part of the mixing
The absorptive part of the mixing
Parameterization of New Physics(NP)
( We neglect NP at tree level decay in our work)
: Magnitude of NP normalized to SM
: NP relative phase
dispersive part absorptive part
Hamiltonian inducing mixing
New Physics?
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Bd
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2 Expeimental Staus of B mesons
×
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CKM fit
No significant deviation !but,
New Physics Contributions to most loop processes still possible !
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T. Hurth, Mahmound, FarXiv:1211.6453v2
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LHCb first result in autumn 2013 ?
K. Hara KEK-ph 2013 March 6
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D0 Anomaly
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CP Violation in Bs
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New PhysicsSM
Observation
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SM prediction is same as in
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Let’s discussion about CP asymmetries of meson .
Non-leptonic CP asymmetry in Bd and Bs
SM prediction
If there is only the KM phase,
Time dependent CP asymmetries
But there may be deviation between SM prediction and experimental results !
SM
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Direct CP Violation in Charm Decays Direct CP Violation in Charm DecaysIn the case of Final state being a CP eigenstate
,Naive Estimation in SM
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Still large error , New Physics ?
Another Direct CP Violation CP Violation of b→sγ ?
×
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How large contributions of Squark flavor mixing
in CP asymmetries of B mesons ?
3 Can we find SUSY in B decays ?
LHCb, Bell, Babar, etc. new results
SUSY parameter
Squark flavor mixing parameters
CP asymmetries in Bd and Bs
We constrain squark flavor mixing parametersby LHCb etc. results + CEDM of strange quark + BR(b→s γ)
We predict CP asymmetries.
Our strategy:
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Search for SUSY particles
So indirect search is also significant.For example, CP asymmetries of B mesons.
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Squark flavor mixing
qL
qR
dSb
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Assume
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Experimental Constraints
Moriond2013:
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photon
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Experimental Constraints
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arXiv:1211.5228 Hisano et al.Improved
Experimental Constraints
from Neutron EDM
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90% C.L.
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4 Summary
Flavor Physics progress in LHC Era !
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ΔB=1 Effective Hamiltonian
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New CP Violating phases in
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D0 Anomaly (Tevatron)
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D0 Anomaly
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Direct CP violation of decay
Experimental results :
Constraints from
SM prediction :
Dominant termin SM
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10-100 TeV, but depends on models
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Direct CP asymmetry
PenguinTree
+
Bs → K π- +
: weak phase
: strong phase
: relative magnitude of Penguin
: Tree level amplitude
Bs → K π-+
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A few %
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