future programs for flavor physics at hadron and lepton colliders
DESCRIPTION
Future programs for flavor physics at hadron and lepton colliders. Yuanning Gao Center for High Energy Physics (TUHEP) Tsinghua University. Thanks to: F. Bossi, S. Eydelman, F.Harris, N. Katayama, S.E.Mueller, Y.F.Wang, M. Yamauchi …. Plan of the talk. - PowerPoint PPT PresentationTRANSCRIPT
Future programs for flavor physics at
hadron and lepton colliders
Yuanning Gao
Center for High Energy Physics (TUHEP)
Tsinghua University
Thanks to: F. Bossi, S. Eydelman, F.Harris, N. Katayama, S.E.Mueller, Y.F.Wang, M. Yamauchi …
August 17, 2007 Y.Gao / LP07 2
Plan of the talk
• Flavor physics now and the future
• Brief overview of B physics at LHC
• Programs for flavor physics at future e+e- colliders
• Summary and perspectives
August 17, 2007 Y.Gao / LP07 3
Flavor physics at a glance
• Focus on future programs at colliders on
- s-quark: Kaon factory- c-quark and -lepton: tau-charm factory - b-quark: Super B-factory
August 17, 2007 Y.Gao / LP07 4
Flavor physics at a glance
• Flavor Physics (for a non-expert at least) is
- Strange: GIM/CKM too good, too easy,… but true
• Focus on future programs at colliders on
- s-quark: Kaon factory- c-quark and -lepton: tau-charm factory - b-quark: Super B-factory
August 17, 2007 Y.Gao / LP07 5
M. Antonelli
• Universality, GIM, CKM all work fine at high precision.
August 17, 2007 Y.Gao / LP07 6
Flavor physics at a glance
• Flavor Physics (for a non-expert at least) is
- Strange: GIM/CKM too good, too easy,… but true- Charming: probing NP beyond TeV scale
• Focus on future programs at colliders on
- s-quark: Kaon factory- c-quark and -lepton: tau-charm factory - b-quark: Super B-factory
August 17, 2007 Y.Gao / LP07 7
• NP strongly constrained by the knowledge of flavor physics
G. Isidori
August 17, 2007 Y.Gao / LP07 8
Flavor physics at a glance
• Focus on future programs at colliders on
- s-quark: Kaon factory- c-quark and -lepton: tau-charm factory - b-quark: Super B-factory
• Flavor Physics (for a non-expert at least) is
- Strange: GIM/CKM too good, too easy,… but true- Charming: probing NP beyond TeV scale- Beautiful: technology & technique, fruitful results (see previous talks at this conference)
August 17, 2007 Y.Gao / LP07 9
Why future programs (1) (A far from complete list )• Search for hits of new physics. - Further (over) constrain the CKM matrix from tree l
evels (less sensitive to NP) and from loop levels (sensitive to NP)
- Rare decays of charm, bottom and tau; charm EDM, kaon interferometer, FCNC decays …
• Understanding the perturbative/non-perturbative nature of QCD. Improve theoretical predictions
- Hadron spectroscopy (quark+gluon), form factors … - R measurements
August 17, 2007 Y.Gao / LP07 10
• Comments for the worst scenario (MFV)
• The (g-2) is showing hints of new physics? Anything else from other places, say the quark sector?
Why future programs (2)
G. Isidori’s talk
August 17, 2007 Y.Gao / LP07 11
How future programs perform
• Precision is the Lord !
- Very high luminosity (10-100) x Current machine - State of the art detectors fast DAQ tracking/vertexing; calorimetries for neutrals; PID; full angle coverage - Analysis techniques - Precise theory, theory & experiment interplay
August 17, 2007 Y.Gao / LP07 12
Brief overview of B physics at LHC
• LHC has great potential for b physics
• Detectors with - high precision tracking/vertexing - efficient trigger with in the final states - efficient trigger with hadronic final states (LHCb) - good PID for /K separation (LHCb)
bb( 14TeV ) ~ 500 b
August 17, 2007 Y.Gao / LP07 13
August 17, 2007 Y.Gao / LP07 14
• Machine and Detector installation is underway
August 17, 2007 Y.Gao / LP07 15
2013-2020(?) Super LHCb, 2x1033, 100 fb-1
T. Nakada
August 17, 2007 Y.Gao / LP07 16
August 17, 2007 Y.Gao / LP07 17
+ Penguin decays: + Penguin decays: BBss + Penguin decays: + Penguin decays: BBss
Expected precision of σstat (NP= tree- penguin) ~6º from time dependent analysis with 5 years/10fb-1
August 17, 2007 Y.Gao / LP07 18
G. Lanfranchi, Lake Louis Winter Institute, 2007
August 17, 2007 Y.Gao / LP07 19
• LHC is also a charm factory ! Dedicated LHCb D* trigger will provide 108 flavor tagged D hh per 2 fb-1.
P. Spradlin, CHARM’07
August 17, 2007 Y.Gao / LP07 20
( ) / 3.5%
( ) / 1.7%
( ) / 4.8%
( ) / 2.8%
Taken from V. Vagnoni at CKM06-Nagoya
Without LHCb With LHCb at 10 fb-1
• Will new Physics show up by 2013 ?
August 17, 2007 Y.Gao / LP07 21
1029
1030
1031
1032
1033
1034
1035
1036
1037
1 10 100 1000
ILC
ADONE
VEPP2000
Super B-factory
KEK BPEP II
CESR
DAFNE
DAFNE2 BEPCII
CESRc
Ecm
(GeV)
L (cm-2sec-1)
VEPP2M
LEP
TRISTANPETRA
VEPP4MDORIS
SPEARBEPC
COLLIDERS
FACTORIES
SUPER FACTORIES
L (cm-2 s-1)
E (GeV)
e+-e- Colliders: Past, Present and Future
August 17, 2007 Y.Gao / LP07 22
VEPP-2000 Ecm: 2m - 2.0 GeVLuminosity: 1032 cm-2s-1
August 17, 2007 Y.Gao / LP07 23
CMD-3 Detector Upgraded SND Detector
B. Khazin, NP B (Proc. Suppl.) 162 (2006) 327
August 17, 2007 Y.Gao / LP07 24
• Physics at VEPP-2000
August 17, 2007 Y.Gao / LP07 25
• The collider is in commissioning, first collisions of the beams were achieved in June.
• Both detectors almost completed their upgrade and this autumn will complete assembling. First physics run may start in a year from now, autumn 2008.
• see LP07 posters !
August 17, 2007 Y.Gao / LP07 26
DAPNE-2
• DAFNE has reached a peak luminosity of 1.4x1032, ~1.5 fb-1/year. About 2.5 fb-1 of data delivered to
KLOE by 2006.
e
e+
KLOE detectorKLOE detector
FINUDA detectorFINUDA detector
August 17, 2007 Y.Gao / LP07 27
• New interaction region will installed (Sep. 2007) for testing “crab waist”.
• 1 fb-1 for SIDDHA (Kaonic atoms).
• Upgrade KLOE detector.
• From summer 2009 for 3-4 years, physics runs again with KLOE-2 detector at Ecm = M. 3-10 fb-1/year.
• Possible lower (1.0 GeV) or higher Energy runs(?)
August 17, 2007 Y.Gao / LP07 28
• Rich physics programs at the -factory
- improve Vus measurement - LPV from Ke2 decays - neutral kaon interferometer (CPT and QM tests) - rare Ks decays - eta and eta’ decays - hadron cross-section measurements - ….
August 17, 2007 Y.Gao / LP07 29
BEPCII/BESIII
SC RF
Beams
August 17, 2007 Y.Gao / LP07 30
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Energy range 1 – 2.1 GeV
Optimum energy 1.89 GeV
Luminosity 1 x 10 33 cm-2s-1 @ 1.89 GeV
Injection Full energy injection: 1.55 1.89 GeV Positron injection speed > 50 mA/min
Synchrotron mode 250 mA @ 2.5 GeV
• BEPCII design goal
• Collider is under installation and also synchrotron mode runs.
• 1/2008 Cosmic ray test for detectors• 3/2008 Detector in place• 5/2008 Start data taking
August 17, 2007 Y.Gao / LP07 32
Magnet: 1 T Super conducting
MDC: small cell & He gas xy=130 m sp/p = 0.5% @1GeV dE/dx=6%
TOF: T = 100 ps Barrel 110 ps Endcap
Muon ID: 9 layer RPC
EMCAL: CsI crystal E/E = 2.5% @1 GeV z = 0.6 cm/E
Trigger: Tracks & ShowersPipelined; Latency = 6.4 s
Data Acquisition: Event rate = 3 kHz Thruput ~ 50 MB/s
BESIII Detector
The detector is hermetic for neutral and charged particle with excellent resolution ,PID, and large coverage.
Two rings, 93 bunches:
• Luminosity
1033 cm s @1.89GeV
6 1032 cm s @1.55GeV
6 1032 cm s @ 2.1GeV
August 17, 2007 Y.Gao / LP07 33
• Charmonium: J/, (2S), C(1S) in J/ decay, C{0,1,2} , C(2S) and hC(1P1) in (2S) decay , (1D) and so on; • Exotics : hybrids, glueballs and other exotics in J/ and (2S) radiative decays;
• Baryons and excited baryons in J/ and (2S) hadronic decays;
• Mesons and mixing of quark and gluon in J/ and (2S) decays;
• Open charm factory : Absolute BR measurements of D and Ds decays, Rare D decay, D0-D0bar mixing, CP violation,f D+, fDs , form factors in semi-leptonic D decays, precise measurement of CKM (Vcd, Vcs), CP violation and strong phase in D Dalitz Decays, light spectroscopy in D0 and D+ Dalitz Decays.
• Electromagnetic form factors and QCD cross section;
• New Charmonium states above open charm threshold---R values ...;
• tau physics near the threshold.
Physics at BESIII
August 17, 2007 Y.Gao / LP07 34
Resonance Mass(GeV)CMS
Peak Lum.(1033cm-2s-1)
Physics Cross Section (nb)
Nevents/yr
J/ 3.097 0.6 3400 10 109
3.670 1.0 2.4 12 106
(2S) 3.686 1.0 640 3.2 109
D0D0bar 3.770 1.0 3.6 18 106
D+D- 3.770 1.0 2.8 14 106
DsDs 4.030 0.6 0.32 1.0 106
DsDs 4.140 0.6 0.67 2.0 106
Average Lum: L = 0.5×Peak Lum.; One year data taking time: T = 107s
Nevent/year = exp L T
Production
Huge J/ and (2S) samples at BESIII
August 17, 2007 Y.Gao / LP07 35
Options to increase luminosity(1) crab crossing done at KEKB
August 17, 2007 Y.Gao / LP07 36
Taken from K. Oide, BGM, 4/07/2007
August 17, 2007 Y.Gao / LP07 37
Options to increase luminosity(2) Standard approach
August 17, 2007 Y.Gao / LP07 38
August 17, 2007 Y.Gao / LP07 39
http://superb.kek.jp/
August 17, 2007 Y.Gao / LP07 40
Overlap region
z
xz
x
(1) and (2) have same Luminosity, but
(2) has longer bunches and smaller
x
(1) Head-on,Short
bunches
(2) Large crossing angle, long bunches
Large Piwinski angle:
= tg(z/x
Options to increase luminosity(3) Crab waist ( The new idea by P.Raimondi)
August 17, 2007 Y.Gao / LP07 41
KEKB SuperB
I (A) 1.7 2.
y* (mm) 6 0.3
x* (mm) 300 20
y* (m) 3 0.035
x* (m) 80 6
z (mm) 6 5
L (cm-2s-1) 1.7x1034 1.x1036
Tests with beam in Frascati DAFNE Study
Fall 2007
August 17, 2007 Y.Gao / LP07 42
SuperB design features
• Two rings @ 4 and 7 GeV with ultra low emittances similar to ILC Damping Rings
• Interaction Region with very strong focusing similar to Linear Colliders Final Focus
• No beamstrahlung = possible beam recirculation in collider
• L ~ 1036 @ (4s)• Possible option to run at tau-ch
arm region with L ~ 1035
August 17, 2007 Y.Gao / LP07 43
August 17, 2007 Y.Gao / LP07 44
August 17, 2007 Y.Gao / LP07 45
Super B-factories by ~201x
• Possible open options for e+e- factories L ~ O(1035 -1036 ) @ (4s) with possible extension to run at (5s) , tau-charm
KEK “Standard” Frascati “Crab Waist”
• LHCb upgrade to Super LHCb
pp collisions at 14 TeV L ~ 2x1033
August 17, 2007 Y.Gao / LP07 46
Super B-factory
Taken from M. Yamauchi
August 17, 2007 Y.Gao / LP07 47
Ecm (GeV)1 3 5 7 9
L(cm-2 s-1 )
1032
1033
1034
1035
1036
Under Construction Under Consideration
Future flavor programs at e+e- colliders
VEPP-2000
BEPCII
Super Charm Factory
Super B Factory
DA
PN
E-2
August 17, 2007 Y.Gao / LP07 48
Summary and perspectives
• Future flavor programs at colliders, together with fixed target experiments, will provide further precise measurements on CKM matrix elements, (very) rare decay rates which are sensitive to new physics beyond the Standard Model.
• Theory – Experiment interplay is essential to maximize the potential of these (expensive) programs.
• Complementary to experiments at high energy frontier, flavor physics will help us to explore features of the new physics, hopefully in near future.
August 17, 2007 Y.Gao / LP07 49
Backup Slides
August 17, 2007 Y.Gao / LP07 50