Future of Flavor Physics MPP Retreat Bayrischzell, 21 January 2014 Christian Kiesling, Luigi Li Gioi, Hans-Günther Moser Why are there so many different fermions? What is responsible for their organization into generations / families? Why are there 3 generations / families each of quarks and leptons? Why are there flavor symmetries? What breaks the flavor symmetries? What causes matter – antimatter asymmetry?
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Future of Flavor Physics - indico.mpp.mpg.de · Flavor Physics MPP retreat Luigi Li Gioi 2 The concept of “flavor physics” was introduced in the 1970s Rev.Mod.Phys. 81, 1887 (2009)
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Future of Flavor Physics
MPP Retreat Bayrischzell, 21 January 2014
Christian Kiesling, Luigi Li Gioi, Hans-Günther Moser
Why are there so many different fermions?What is responsible for their organization into generations / families?Why are there 3 generations / families each of quarks and leptons?Why are there flavor symmetries?What breaks the flavor symmetries?What causes matter – antimatter asymmetry?
Flavor Physics
Luigi Li Gioi 2MPP retreat
The concept of “flavor physics” was introduced in the 1970s
Rev.Mod.Phys. 81, 1887 (2009)
Many projects for the next decade:b-Physicst-Physicscharm-PhysicsKaon-Physicsm-Physics
No projects foreseen for very long term. The future of Flavor Physics will depend on the results of the next years
b-Physics: the next decade b-Physics in the next 10 years will be covered by Belle II and LHCb (including upgrade)Very different environments, complementary physics programs
MPP retreat Luigi Li Gioi 3
CP violation
The nightmare The dream
Summer 2013
Possible scenarios in 10-15 years from now
Depending on results there may be a case for a further luminosity increase by a factor 10 of SuperKEKB
feasibility of a further luminosity upgrade must be considered based on the actual experience at SuperKEKBNo concrete idea at the moment Possibility to precisely measure channels that can only be observed at SuperKEKB: e.g. B → K(*) n n R&D will be needed also for the detector
Japan's Strategy for Future Projects (February 2012)
MPP retreat Luigi Li Gioi 4
Rare decays Indirect discovery of New Physics in quantum loops
via high precision measurements
MPP retreat Luigi Li Gioi 5
t Physics Lepton Flavor Violation in t decays
About 2.8s from SM prediction = (0.36 ± 0.01)% (due to CPV in kaon sector)
CP Violation in t decay with Ks in the final state
From SM :
BaBar: PRD 85 031102 (2012)
CPV violation in t is expected to be tested at 0.01 % in Belle II
MPP retreat Luigi Li Gioi 6
Charm Physics
Starting not before 2020
Two-rings e+e−: L=1035 cm-2 s-1
Linear accelerator for full energyPositron injectorPolarized electron injector
The main purpose Search for effects of CP-violation in the decays of charmed particlesTests of the Standard Model in the decay of the t lepton
t production 5 time less than what expected from SuperKEKB Search and study of an entirely new form of matter: glueballs, hybrids, etc.
MPP retreat Luigi Li Gioi 7
Kaon Physics
The goal of KOTO is to observe the decay K
L → p0 n n with the sensitivity
of the Standard Model prediction (2.49 ± 0.39) 10-11, and search for new physics beyond the Standard Model.
KOTO experiment: up to 2019
NA62 experiment: data taken starts in 2014
Measurement of the very rare kaon decay K+→ p+ n n at the CERN SPS to extract a 10% measurement of the CKM parameter |Vtd|.Aims to collect about 80 K+→ p+ n n events at the SM prediction with a signal to background ratio of 10:1 in two years of data taking.
MPP retreat Luigi Li Gioi 8
http://koto.kek.jp/
http://na62.web.cern.ch/na62/Home/Home.html
m Physics
COMET (COherent Muon to Electron Transition)
search for coherent neutrino-less conversion of muons to electrons, in the presence of a nucleus, μ−+N(A, Z) → e−+N(A, Z) single event sensitivity B(μ−N→e−N)<10−16
Phase 1 up to 2016, phase 2 from 2021
MEG upgrade
Aiming at a sensitivity improvement ofone order of magnitude(down to 5 x 10-14)
SM prediction: Br < 10-40
Any observation would be an evidence of new physics
MPP retreat Luigi Li Gioi 9
http://meg.icepp.s.u-tokyo.ac.jp/
http://meg.icepp.s.u-tokyo.ac.jp/
Very rich Flavor Physics program for the next 15 years
Intensity Frontier: indirect research of new physics with precise measurements
Program complementary to the Energy frontier
MPP strongly involved in Belle II
Hardware development
Preparation for Physics
Future Physics analysis
The future of flavor physics strongly depends from the results of the next decade
MPP has the expertise for developing future projects
Medium size collaborations: the role of MPP can be very important