1. measurements – Part II Christos Leonidopoulos Columbia/DØ -“Snowmass Studies” July 2, 2001 limiting theoretical & experimental errors expected sensitivity from CDF, D0, BTeV, ATLAS, CMS, LHCb prospects for error improvement SM vs. other model predictions

2. July 2, 2001Christos Leonidopoulos Phenomenology: SM predictions Accuracy limited by lattice data for operator product /QCD heavy product expansion quenched lattice QCD QCD-NLO http://www-theory.fnal.gov/people/ligeti/Brun2/sept/nierste.pdf http://cern.ch/nierste/uli.ps http://www-theory.fnal.gov/people/nierste/wg3documents/cern.breport.ps.gz

3. July 2, 2001Christos Leonidopoulos Existing measurements Assuming Without external constraints (expected within ±1%) PDG2001 LEP B-Oscillation Group (CDF-RunI not included) Phenomenology

4. July 2, 2001Christos Leonidopoulos Phenomenology: beyond the SM SM : CP violation in B S mixing small New physics: large CP violation; affects only ΔΓ S CPV phase in mixing (φ SM ~ 0) determine CPV phase

5. July 2, 2001Christos Leonidopoulos Experimental methods untagged data samples: sensitivity ~ flavor specific: sensitivity ~ CP eigenstates : sensitivity ~ CP eigenstate + (50%-even, 50%-odd)

6. July 2, 2001Christos Leonidopoulos …Experimental methods CP eigenstate + (50%-even, 50%-odd) - admixture of CP-even and CP-odd states - the ΔΓ S error depends on the admixture CDF-RunI: (73 ± 19) % CP-even easy trigger!

7. July 2, 2001Christos Leonidopoulos Expected sensitivity: CDF-RunII ModeSensitivityComments 100% even 73% even 50% even — CDF-RunI: (73 ± 19) % even Notes: SM gives an upper limit of ~20% for ΔΓ S /Γ S To claim a discovery, we need   projected #’s RunI to RunII (MC: optimistic)

8. July 2, 2001Christos Leonidopoulos Expected sensitivity: BTeV Notes: SM gives an upper limit of ~20% for ΔΓ S /Γ S To claim a discovery, we need   Remember:

9. July 2, 2001Christos Leonidopoulos Expected sensitivity: LHC Notes: SM gives an upper limit of ~20% for ΔΓ S /Γ S To claim a discovery, we need   Remember: ATLAS, CMS, LHCb:

10. July 2, 2001Christos Leonidopoulos Phenomenology: prospects Alexander Lenz (Regensburg)

11. July 2, 2001Christos Leonidopoulos …Phenomenology: prospects Alexander Lenz (Regensburg)

12. July 2, 2001Christos Leonidopoulos History on ΔΓ S Isard Dunietz (Fermilab)

13. July 2, 2001Christos Leonidopoulos …History on ΔΓ S Isard Dunietz (Fermilab)

14. July 2, 2001Christos Leonidopoulos Possible scenarios Matin Martin (Oxford)

15. July 2, 2001Christos Leonidopoulos Expected sensitivities: References http://mit2.fnal.gov/~paus/bw1999/MEETINGS/000217-delta-gamma.ps http://www-theory.fnal.gov/people/nierste/second_ws_talks/martin.ps.gz http://www-theory.fnal.gov/people/nierste/second_ws_talks/cheung.ps.gz http://home.fnal.gov/~cheung/Public/run2/btev_deltag.ps.gz http://home.fnal.gov/~cheung/Public/run2/main.ps.gz http://mit.fnal.gov/~paus/TMP/Breport/main.ps http://cern.ch/nierste/uli.ps hep-ph/0003238