Super B Factory workshop Round Table

1. Super B Factory workshop Round Table Guy Wormser LAL Orsay Guy Wormser , SuperB workshop , 25 July 2006

2. Charge • Super B Physics Case • Technical implementation • Project organization • What are the next steps to succeed Guy Wormser , SuperB workshop , 25 July 2006

3. Preamble • Entering a very exciting period with a conjunction of • Very profound scientific agenda • Very powerful tools to make breakthroughs: LHC, ILC, Planck, large double beta decays and direct Dark matter experiments • Significant changes in accelerator based HEP worldwide landscape • Globalization • Reduced number of machines, experiments, large laboratories • An international very ambitious superb Factory is very appropriate in the future HEP landscape Guy Wormser , SuperB workshop , 25 July 2006

4. Super B Physics case • Mission statement : Understand the flavour sector of the new « beyond standard model » physics, soon to be discovered at the LHC • Important to do so because it is already apparent that this sector is strongly constrained: unknown symmetry principles at work that should be unveiled • Needed Sensitivity: BSM effects are driven by phase/mass. Super B must be able to cover TeV mass range and phases as small as in SM (Minimum Flavour Violation Model) • Two scenarios: • mass scale is measured at LHC/ILC, either directly or indirectly: SuperB provides key information of NP flavor sector either by finding BSM signals or by very strong constraints on the flavour sector, in order to discover the underlying symmetry • Only lower limit of mass scale is given at LHC/ILC. A deviation from SM at superB extends the reach if phases are large • Concede that there is limited stand alone impact: no retroengineering • Always try to present sensitivies in form of mass reach Guy Wormser , SuperB workshop , 25 July 2006

5. Physics case (II) • Best sensitivity for Lepton flavor violation • Relation to neutrino sector, lepto-genesis,.. • We know that SM CP violation can not be the end of the story because does not explain matter/antimatter asymetry but BABAR/BELLE showed that it is suprisingly almost all the story! Need for a very diverse search for BSM effects. Of course, all the clues from BABAR/BELLE constitue a very good starting point Guy Wormser , SuperB workshop , 25 July 2006

6. Physics case conclusion • The physics case has been qualified as « very important » by the European Strategy group, which means: • This machine must be sold in a « post LHC » world, (not necessarily implying that it can be approved only after LHC results are known) • « No loose » theorem: BSM phases are small or large: either very strong contribution to discover the underlying totally unknown symmetry principles or extend mass range above LHC/ILC • Best sensitivity in Lepton Flavor Violation, to be connected if possible to leptogenesis and neutrino • Beware : Physics case solid only in the 10** 36 range Guy Wormser , SuperB workshop , 25 July 2006

7. Can this project become real? • YES, but only in a OPPORTUNISTIC manner • Exploit regional strategical need, such as: • KEK wants to continue to have a world first class machine on its site in the period 2010-2020 • A country (eg Italy) wants to invest on a mid-size world class facility on its soil • B-factory is part of an enlarged global ILC siting negociation • And/or very good re-use of existing material to make it cheaper • PEP-II hardware, already existing tunnel and lab infrastructure (HERA/DESY, KEKB, PEPII, Tevatron/Fermilab), BABAR or BELLE detector elements • And/or strong need claimed by a first priority project • ILC states that it needs a real size damping ring prototype • Must not COMPETE with, or SLOW DOWN, ILC approval Guy Wormser , SuperB workshop , 25 July 2006

8. Scientific Activities (6) • Flavour physics and precision measurements at the high-luminosity frontier at lower energies complement our understanding of particle physics and allow for a more accurate interpretation of the results at the high-energy frontier;these should be led by national or regional collaborations, and the participation of European laboratories and institutes should be promoted. Guy Wormser , SuperB workshop , 25 July 2006

9. Guy Wormser , SuperB workshop , 25 July 2006

10. US EPP2010 Guy Wormser , SuperB workshop , 25 July 2006

11. Technical implementation • Super KEKB: Ball in KEK camp, be very ambitious: the physics case is solid only in the 10**36 range! • But very difficult to conceive a detector able to perform beautifully if present background conditions have to be ~directly extrapolated! • INFN initiative : two new good points (that can be reused by KEK) • Possible synergy with ILC technology and project • High lumi with potentially tolerable background conditions • The community should be opportunistic and support fully the most realistic one Guy Wormser , SuperB workshop , 25 July 2006

12. Project organization • Hera model vs global project • Definitely go for the HERA model! • Only possible exception : SuperB is included in the ILC siting package deal • One country must unilateraly decide to commit building this machine and put at least 60% of the money on the table (cf Germany for XFEL, FAIR). Will be much easier if this country (or club of countries) offers to pay running costs as well • Such a scheme for such a machine is explicitly encouraged in the European Strategy document Guy Wormser , SuperB workshop , 25 July 2006

13. Charge for the community • Continue to develop the physics case along the proposed guidelines • Be very supportive of LHC/ILC programs! • Be imaginative to create opportunities (tunnels, harware, synergies,..) • Exploit exciting hints from BABAR/BELLE legacy • Consider joint statement from the community along the conclusions of this workshop, based on the various strategy documents. Timing driven by KEK, INFN, … needs Guy Wormser , SuperB workshop , 25 July 2006

14. Situation in France • Significant interest in the physics community • Do not expect a large financial contribution to the project • Possible participation in machine and MDI studies • LAL Orsay looks positively to a Super B initiative Guy Wormser , SuperB workshop , 25 July 2006