1.  c ’ mass and width S.K. Choi & S.L. Olsen April 1, 2005Belle quarkonium group TV Meeting

2. In original paper we fit 40MeV K S K  mass bins N evt = 45.3 ± 12.6 M  c ’ = 3653 ± 10 MeV   c ’ = 33 ± 22 MeV N evt = 90.5 ± 14.9 M  c = 2978 ± 5MeV   c = 33 ± 16 MeV M(K S K  ) M bc EE c:c: c’:c’: 3.55 GeV 3.60 GeV 3.65 GeV 3.70 GeV 3.75 GeV … …

3. Subsequent measurements found lower mass values   K S K  e  e   J/  X MxMx BaBar (PRL 92, 142002) 3630 MeV 3642 MeV 3633 MeV CLEO hep-ex/0306060 elle cc cc ‘

4.  c ’ ) : current status M avg =3637±4 MeV (Crystal Ball excluded)

5. 1 st look at B  K K S K  with ~300 fb -1 M(K S K  ) GeV 1 st use J/y signal to establish resolution And mass scale (e7  most of e39)

6. Fit M bc -  E dists for B signals ± 45 MeV around M J/  in 10 MeV bins Fit: M= 3097.0 ± 0.85 MeV (PDG: 3096.92 MeV) Resol:  = 7.6 ± 0.7 MeV

7. Fit M bc -  E dists for B signals at  c ’ ± 60 MeV around 3655 MeV in 10 MeV bins Fit: M= 3644.7 ± 2.5 MeV (PRL: 3654 ± 11 MeV) Width:  = 24.5 ± 11.6 MeV Use K* excluded sample to avoid  ’ contamination

8. Check with  c1 ± 45 MeV around 3510 MeV in 10 MeV bins Fit: M= 3509.5 ± 1.7 MeV (PRL: 3510.6 ± 0.1 MeV) Width:  fixed at J/  value

9. Mass and width for  c ± 60 MeV around 2990 MeV in 10 MeV bins Fit: M= 2983.9 ± 1.1 MeV (PRL: 2979.6 ± 1.2 MeV) Width:  = 32.7 ± 3.8 MeV Use K* excluded sample to avoid  ’ contamination

10. McMc Today’s result(2983.9 ± 1.1 ± ~2)

11. cc PDG:17.3 ± 2.7 Skwarnicki’s avg: Today’s result(32.7 ± 2.8 ± ?)

12.  c ’ ) : current status M avg =3637±4 MeV (Crystal Ball excluded) today’s result 3644.7 ± 2.5 ± ~2.0

13. c’c’ BaBar 17 ± 8 MeV Belle today’s result 24 ± 12 MeV

14. comments Use J/  &  c1  K S K  as a reference –Reduces systematics M(  c ) & M(  c ’ ) seem to depend on process –Interference with non-resonant amplitudes?

15. McMc