Budker Institute of Nuclear Physics

1. Budker Institute of Nuclear Physics Status and results of Novosibirsk accelerator complex Pavel Logachev, ICPPA’17

2. Particle Physics at Budker INP A few generations of the colliders and detectors Collider 2E, GevDetectors Operation VEP-1 (e-e-) 0.32 2 detectors 1965-67 VEPP-2 1.4 3 detectors 1967-72 VEPP-3 2.0 2 detectors 1972- (booster and Nucl. Phys) VEPP-4 11.0 OLYA, MD-1 1980-85 VEPP-2M 1.4 OLYA, TOF,ND 1974-2000 CMD, SND, CMD-2 VEPP-4M 11.0 KEDR 2000- VEPP-2000 2.0 SND, CMD-3 2009 Tau-Charm ?

3. BINP’s colliders: 2E=0.3-11.0 GeV (5 quarks of 6!)2Е=2.0-5.0 GeV 2E=5.0-12.0 GeV

4. VEPP-2M Collider Complex operated 1974-2000; • Lmax=4x1030cm–2sec–1 at E0=510 MeV; Total integrated luminosity 80 pb–1. • Some results: - Development of the resonant depolarization technique for precise measurements of particles masses (from 1975) - Detailed study of K, , ,and-mesons(precise measurements of parameters, rare decays and etc)

5. Results of e+e– annihilation cross section measurements by SNDand CMD-2 detectors atVEPP-2Mpresicion now is ~1% and will be improved to ~0.3% at VEPP-2000! These measurements are necessary for determination of g-2 and 

6. g-2 measurements  Theory BNL Expected precision at Fermilab 4 times better! +(g-2/EDM experiment at JPARC) New challenge for e+e-  hadrons measurements ! Fermilab

7. Injection Complex VEPP-5 providing both BINP colliders VEPP4M and VEPP-2000 with the electron and positron beams Achieved Parameters (2016): Energy: 395 MeV Storage rate e-@ 12.5 Hz: 4.0·1010/s (70 mA/s) Storage rate e+@ 12.5 Hz: 4.0·109/s (7 mA/s) Max. beam current e- : 100 mА, 4.2·1010particles Max. beam current e+: 70 mA, 2.9·1010particles Beamline to VEPP-4M 130 m Conversion System Beamline to VEPP-2000 250 m Beam @ VEPP-4M Injection Complex and beam transfer lines Beam @ BEP

8. VEPP-2000 e+e- collider @ Novosibirsk VEPP-2000 complex K-500 beam transfer channel BINP Injection complex Final focusing 13T solenoids Commissioned in 2009 with old injection chain. Data collection 2010-2013. Upgrade 2013-2016 (new injection complex, booster top energy increase). Injection chain commissioning 2016, regular operation 2017.

9. VEPP-2000 re-commissioning Stacking rate 2×108 e+/sec @ 390 MeV (×10 in comparison to old system) K-500 transfer channel and beam @ scintillator screen I, mA e+ e test beams @ “warm” VEPP-2000 Beam scrubbing @ VEPP-2000 20/21

10. Round Colliding Beams @ VEPP-2000 World record beam-beam parameter value achieved:  ~ 0.12/IP Averaged luminosity (CMD-3 data, 2010-2013) Limited e+ production rate Target luminosity integral: 10 times higher, 1fb-1 (now achievable with new injector)

11. Physics at VEPP-2000 • Study of hadronic cross sections e+e– →2h, 3h, 4h …, h= ,K,,… • Precision measurement of R=(e+e– → hadrons)/ (e+e–→+–) • Study of light vector mesons excitations: ’, ’’, ’, ’,.. • Comparison of the energy dependence of e+e– → hadr. (I=1) cross sections withspectral functions int -decays • Measurement of the nucleons electromagnetic form factors andsearch forNN- resonances • Study ofe+e–-annihilation into hadrons at low energyby radiative return (ISR) • Two-photon physics • High order QED processes At least 10 years of very interesting physics in future !

12. SND at VEPP-2000 1 – beam pipe, 2 – tracking system, 3 – aerogel, 4 – NaI(Tl) crystals, 5 – phototriodes, 6 – muon absorber, 7–9 – muon detector, 10 – focusing solenoid. Advantages for VEPP-2000: 1- cherenkov counter, n=1.05, 1.13 – e/pseparation E<450 MeV, p/K separation E<1 GeV, 2 –drift chamber – better tracking

13. DetectorCMD-3 Mu LXe ДК ZК TOF CsI BGO

14. Some new results from SND and CMD-3 _ e+e- NN _ _ e+e- pp e+e- nn

15. e+e- 6πby CMD-3 BaBar CMD-3 ОБНОВИТЬ Phys.Lett. B723 (2013) 82-89 15

16. SND results in 2016 Five processes of e+e– →hadronswere studied by SND in 2016: e+e– →π0γ, K+K–, π0π0γ, π+π–π0η, ωπ0η. Cross sections of the processes e+e– →π+π–π0η and ωπ0η were measured for the first time. e+e– →ωπ0η e+e– →π+π–π0η Center-of-mass energy, GeV

17. 4. ROKK-1M Detector KEDR VEPP-4M Collider 2Е=211 GeV L=2х10**30 см-2с-1 L= 8х10**31 см-2с-1

18. Detector KEDR • 2004-2011 L= 21 pb-1 was collected: study of - mesons, D-mesons, -lepton, R-measurements and etc. • 2012-2013 – upgrade and repair • 2014-2017- next run

19. VEPP-4M and KEDR detector • The luminosity of VEPP-4M is lower than at B-factories • But some advantages: • Large energy region 2Е=211 GeV • Technology of high precision measurement of the beam energy (concentration on high precision particle mass measurement). • Detector KEDR equipped by LKr calorimeter with high energy and space resolution. • High resolution tagging system (two-photon physics). • Physics at VEPP-4M & KEDR is concentrated on high precision measurements • High precision measurements of particle masses: J/, (2S), (3S), D-mesons, -lepton,(1S) (2S) (3S), Y(4S) • Spectroscopy of ccandbbstates • The measurement of R in the energy region 2E=2-7 GeV • Two photon physic: total cross section hadrons , study of C-even states

20. High precision measurements at VEPP-4M&KEDR VEPP-4M energy calibration Resonance depolarization Compton backscattering J/, (2S), (3S), D-mesons, -lepton masses and some other parameters of these particles have been measured with best precision using these methods Best known particle masses 

21. Super Charm-Tau Factory Detector Existing new injector complex (in 2013 – operation with positron beam) е-е+ convertor Two rings Linac 2 GeV Ист.е- Linac 500 MeV Ист.е- Tunnel for 2 GeV Linac is ready Damping Ring • Two rings • Crab waist • L = 1×10**35 cm-2s-1, • Variable energy Ecm= 2 – 5 GeV • Longitudinal polarization

22. Super C/tau Factory at Novosibirsk (physics) ► D-Dbar mixing ► CP violation searches in charm decays ► Rare and forbidden charm decays ► Standard Model tests in  leptons decays ► Searches for lepton flavor violation t→mg ► CP/T violation searches in  leptons decays Requirements: L > 1035 cm-2 s-1, longitudinal polarization, General Purpose with perfect PID

23. Polarization at Super C/tau Factory If even one beam polarized,  almost 100% longitudinally polarized near the threshold Polarization may increase sensitivity by several times! Michel parameters CP-violation in -decays

24. Artistic view of future Charm-tau factory • Accelerator Complex 207 MEuro • Detector 91 MEuro • Buildings infrastructure – 100 MEuro • BINP has already invested 37 MEuro in the capital construction and injection complex

25. Super Tau-Charm factoryproject status and plans • Project was preliminary approved by Russian Government (2011) • CDR –has been completed (2012) • Road map –is ready (6 years for realization) • Very positive statement of ECFA (2012) • Collaboration is growing (now 10 Institutes from Russia and 9 Institutes from other countries) • Design of the building has been completed (2013) • Conceptual model for computing is ready (2013) • R@D for machine and detector in progress • Injection complex construction in progress • Very positive reply of EU review Committee (2013) • Funding decision and construction ?

26. Conclusion • A few generations of colliders and detectors successfully operated at Budker INP with world-wide recognized contributions to particle physics • VEPP-4M and VEPP-2000 with 3 detectors are in operation at present interesting physics in the coming years • Budker INP successfully collaborates in a few outstanding experiments outside • Super Tau-Charm is the future (but funding approval is necessary!)