1. Round table Physics at Super-  -c factory 1 Super-  -c factory, BINP, Sep 2008 Some starting points for discussion Physics @ Super-  -c factory

2. Round table Physics at Super-  -c factory 2 Super-  -c factory, BINP, Sep 2008 Generalities Production cross-sect., lumin.: cc prod. cross-sect. at  (4S): ~1.3 nb; prod. of D* + → D 0  + : 4x10 7 D 0 ’s/100 fb -1 ; prod. of D 0 ’s at  (3770): 6x10 7 D 0 ’s/100 fb -1 ; Super-B: ~8-10 ab -1 /year (10 7 s); Super-  -c: ~1 ab -1 /year; BES-III: ~10 fb -1 /year; Time schedule? end of 2011: BES-III 30 fb -1 Super-Belle start in ~10 years(?): Super-B Super-  -c

3. Round table Physics at Super-  -c factory 3 Super-  -c factory, BINP, Sep 2008 List of possible topics Questions: - motivation answers: high/medium/low - what precission is needed/can be achieved (compared to Super-B/BES-III/LHCb) answers: feasible/not feasible/not useful

4. Round table Physics at Super-  -c factory 4 Super-  -c factory, BINP, Sep 2008 List of possible topics Physics topics - 

5. Round table Physics at Super-  -c factory 5 Super-  -c factory, BINP, Sep 2008 List of possible topics Physics topics - 

6. Round table Physics at Super-  -c factory 6 Super-  -c factory, BINP, Sep 2008 List of possible topics Physics topics - charm leptonic decays (decay constants) semileptonic decays (form factors) rare decays (NP search/identification) D 0 mixing, CPV t-dependent/t-independent CPV, so far unused methods at B-factories (T-odd observables, advantages of polariz. -  c  c ) Spectroscopy “exotic” (X,Y,Z); X(3872) 1 ++ (B decays) ; Y family 1 -- (ISR produced from  (4S)); Z + (4430) (B decays); production, CMS energy, scan?  (D ( * ) D ( * ) ) @  s~4.5 GeV (inclusive/exclusive) Other ( ,...)

7. Round table Physics at Super-  -c factory 7 Super-  -c factory, BINP, Sep 2008 List of possible topics Machine & detector topics need for asymmetric energy machine? (asymmetry factor?) CMS energy, scan? Long. polarization - energy interval? Transverse polariz.? Need for equal polariz. of opposite helicity? Need for polarized e + beam? ,  /K,  /e PID performance needed? Vertex detector? Beam pipe issues? Momentum resol.? EM calorim. angular & energy resol.? K L,  range system?  polarization measurement? Hermeticity? MC (background) simulation

8. Round table Physics at Super-  -c factory 8 Super-  -c factory, BINP, Sep 2008 List of possible topics

9. Round table Physics at Super-  -c factory 9 Super-  -c factory, BINP, Sep 2008 1. D s leptonic decays D s →  Average of absolute meas.; huge improvement in LQCD accuracy; to do list: confirm LQCD uncertainty; reduce exp. uncertainty; D s →  e  0.4% non-scaling syst. (#tags) BES-III:  (f Ds )~1%; from  e  alone with 100 fb -1  (f Ds )~0.5% (not considering more tagging modes) 230 240 250 260 270 280 290 300 MeV   e  aver. Belle, PRL100, 241801 (2008), 548fb -1 Cleo-c, PRL99, 071802 (2007), 314pb -1 Cleo-c, PRL100, 161801 (2008), 298pb -1 MILC, PRL95, 122002 (2005) LQCD HPQCD, UKQCD, PRL100, 062002 (2008) 3.3  discrepancy 274 ±10 MeV 241 ±3 MeV Cleo-c, PRL100, 161801 (2008), 298pb -1

10. Round table Physics at Super-  -c factory 10 Super-  -c factory, BINP, Sep 2008 2. Semileptonic decays V ub exclusive measurements, B →  l  |V ub |f + (0)  |V ub |=(3.6 ± 0.5)x10 -3 comparable accuracy to incl. measurements f + (0) th. uncertainty (LQCD) ±12% need: improvement in th. accuracy & tests of LQCD f.f. calculations in charm sector D →Pe, P=K,  ; untagged meas., p from p miss ; q 2 dependence (  (q 2 )~0.01 GeV 2 ); sys. due to simulation ±1.7% on Br; total error ±4.8% on Br; with 1 ab -1 uncertainty on |V cd |f + D (0) dominated by syst. error, ~ 0.5%; Cleo-c, PRD77, 112005 (2008) 281 pb -1 D 0 →  e

11. Round table Physics at Super-  -c factory 11 Super-  -c factory, BINP, Sep 2008  ~40%, Br(m ee <0.7 GeV)~10 -7, background? (negligible in ) 3. Rare decays D ± →  ± l + l - need sensitivity to ~10% of Br at high/low m ee ; Cleo-c, PRL95, 221802 (2005) 281 pb -1 c W±W± d,s,b Z0,Z0, l+l+ l-l- u, d u c g Z0,Z0, u c ~ u ~ ~  m ee [GeV]

12. Round table Physics at Super-  -c factory 12 Super-  -c factory, BINP, Sep 2008 4. D 0 mixing D →K*(p 1,  1 )K*(p 2,  2 ) T(p i,  i ) = -p i,  i ; but A T ~ sin(  )  : weak phase  : strong phase;  asymmetry of conjugated process A T CP ~ sin  cos  n.b.: A CP dir ~ sin  sin 

13. Round table Physics at Super-  -c factory 13 Super-  -c factory, BINP, Sep 2008 4. D 0 mixing CPV  c →  angular distrib. diff. between  c and anti-  c ;  (e + e - →  c X) at  (4S) ~ 0.2 nb at threshold ~0.5 nb  p    cc  rest frame

14. Round table Physics at Super-  -c factory 14 Super-  -c factory, BINP, Sep 2008 M D +M D* c’c’ J/  cc  c0  c1  c2 ’’ ”” hchc c”c” hc’hc’ c1’c1’  c2 22 33 5. Spectroscopy X(3872) J PC =1 ++, 2 -+ ; DD* mode larger than J/   1 ++ favoured; not easy to produce;  (4040),  (4160) decays? Y family Y(4260), Y(4360), Y(4660); produced in ISR from  (4S), 1 -- ; @4.2 GeV eff. lumin. ~ O (100 pb -1 ) hybrid, DD 1 (D*  ) decay mode?

15. Round table Physics at Super-  -c factory 15 Super-  -c factory, BINP, Sep 2008 Backup

16. Round table Physics at Super-  -c factory 16 Super-  -c factory, BINP, Sep 2008 Super-KEKB bckup KEK roadmap A. Suzuki, KEK Director General, Inaugural meeting of Super Belle

17. Round table Physics at Super-  -c factory 17 Super-  -c factory, BINP, Sep 2008 D s leptonic decays bckup D s →  Average of absolute meas.; huge improvement in LQCD accuracy; agreement for f D+ : LQCD: 208 ± 4 MeV exp.: 223 ±17 MeV (but exp. error larger than for f Ds ) 230 240 250 260 270 280 290 300 MeV   e  aver. Belle, PRL100, 241801 (2008), 548fb -1 Cleo-c, PRL99, 071802 (2007), 314pb -1 Cleo-c, PRL100, 161801 (2008), 298pb -1 MILC, PRL95, 122002 (2005) LQCD HPQCD, UKQCD, PRL100, 062002 (2008) 3.3  discrepancy 274 ±10 MeV 241 ±3 MeV to do list: confirm LQCD uncertainty; reduce exp. uncertainty;

18. Round table Physics at Super-  -c factory 18 Super-  -c factory, BINP, Sep 2008 D s leptonic decays bckup D s →  signal shape checked with fully recon. events (with one D s discarded); 5% syst. on Br from #tags; out of this ~3% from unknown bkg. shape & bias in #tags in ,  compared to generic events  1.5% non-scaling system. on f Ds ; total 5.4% error on f Ds ; tags D s →KK , MM* 2 from D s tag,  Cleo-c, PRL99, 071802 (2007), 314pb -1 Cleo-c, hep-ex/0607074, 200pb -1

19. Round table Physics at Super-  -c factory 19 Super-  -c factory, BINP, Sep 2008 D s leptonic decays bckup D s →  e  sideband subtraction for #tags; syst. on Br from #tags 0.8%; peaking bkg. from K L e ; estimated from data using K S e ;  0.4% non-scaling system. on f Ds ; total 6.6% error on f Ds ; BES-III:  (f Ds )~1% from  e  alone with 100 fb -1  (f Ds )~0.5% (not considering more tagging modes) energy in calorim. from D s *D s (signal  from Ds*) Cleo-c, PRL100, 161801 (2008), 298pb -1 tags

20. Round table Physics at Super-  -c factory 20 Super-  -c factory, BINP, Sep 2008 D s leptonic decays bckup D s → l NP M: NP mass B.A. Dobrescu, A.S. Kronfeld,, PRL100, 241802 (2008) type II two Higgs doublets models: destructive interference

21. Round table Physics at Super-  -c factory 21 Super-  -c factory, BINP, Sep 2008 Semileptonic decays bckup V ub exclusive measurements, B →  l  |V ub |f + (0)  |V ub |=(3.6 ± 0.5)x10 -3 comparable accuracy to incl. measurements f + (0) th. uncertainty (LQCD) ±12% need: improvement in th. accuracy & tests of LQCD f.f. calculations in charm sector D →Pe, P=K,  ; untagged meas., p from p miss ; q 2 dependence (  (q 2 )~0.01 GeV 2 ); shape of f.f. determined in data; Cleo-c, PRD77, 112005 (2008) 281 pb -1 D 0 →  e

22. Round table Physics at Super-  -c factory 22 Super-  -c factory, BINP, Sep 2008 Semileptonic decays bckup V ub absolute measurement of Br, need N(DD); sys. error due to N(DD) scales with lumin.; sys. due to simulation ±1.7% on Br; total error ±4.8% on Br; Br(D 0 →  e )=(0.299±0.011±0.009)% with 1 ab -1 uncertainty on |V cd |f + D (0) dominated by syst. error, ~ 0.5%; method of absolute Br measurement developed also by Belle; with 5 ab -1 uncertainty on |V cd |f + D (0) ~1% Cleo-c, PRD77, 112005 (2008) 281 pb -1 D. Asner, ICHEP’08

23. Round table Physics at Super-  -c factory 23 Super-  -c factory, BINP, Sep 2008 Rare decays bckup D ± →  ± l + l - need sensitivity to ~10% of Br at high/low m ee ; Cleo-c, PRL95, 221802 (2005) 281 pb -1 c W±W± d,s,b Z0,Z0, l+l+ l-l- u, d u c g Z0,Z0, u c ~ u ~ ~  m ee [GeV] 90% C.L. UL on total Br ~ 7.4x10 -6 for e + e - mode, excluding resonant contrib.

24. Round table Physics at Super-  -c factory 24 Super-  -c factory, BINP, Sep 2008 Rare decays bckup D ± →  ± l + l -  ~40%, Br(m ee >1.1 GeV)~10 -7, background? (negligible in ) Cleo-c, PRL95, 221802 (2005) 281 pb -1