Project Outlook David Hitlin SuperB Workshop LNF December 4, 2009 David Hitlin SuperB Workshop Frascati Dec. 4, 2009 1 I will not attempt to recap the summaries you have just heard, but rather provide some impressions David Hitlin SuperB Workshop Frascati Dec. 4, 2009 2 White Papers The White Paper schedules are now decoupled They are no longer fulfilling their originally intended purpose, but they are nonetheless quite important: Update of CDR sections, which are very much in need of revision to reflect the substantial progress that has been made Bring focus to a variety of issues Opportunity to revisit costs and schedules Pathway to a TDR Tool for seeking funding and expanded collaboration Accelerator WP is actually CDR2 The individual White Papers, all intended for completion within the next few months, are in somewhat different states of preparation, as you have heard, but all have made good progress David Hitlin SuperB Workshop Frascati Dec. 4, 2009 3 SuperB web pages and Wikis There are quite nice collaborative tools on the SuperB web site, but they are not yet deeply incorporated into lifestyle of most efforts Portals Detector primarily White Paper instructions Accelerator last posting January 2009 Computing useful guides, simulation requests, etc. Physics (reached from Detector) there are a nice set of explanatory pages, and activity in some areas http://mailman.fe.infn.it/superbwiki/index.php/Main_Page David Hitlin SuperB Workshop Frascati Dec. 4, 2009
4 Accelerator The machine design is maturing The present circumference of ~1323m appears stable to design improvements and optimizations There appears to be adequate headroom for operational flexibility in achieving design performance There will likely be a miniMAC in the late Spring Longitudinal polarization (~70%) is now incorporated into the lattice with solenoids, There is a preliminary design of a Compton polarimeter to measure the polarization with ~1% systematic uncertainty using the polarization dependence in the energy distributions of the scattered longitudinally polarized electron and backscattered circularly polarized photon There is increased understanding of the capability of running at ~4 GeV with luminosity somewhat less than 1035 David Hitlin SuperB Workshop Frascati Dec. 4, 2009 5 Compton Differential Cross Section Endpoint asymmetry is ~0.15 at 4.18 GeV b a for same (red curve) and opposite (green curve) helicity configuration of laser photon (2.33 eV) and beam electron (4.18 GeV) David Hitlin SuperB Workshop Frascati Dec. 4, 2009 6 Compton IP near 180o spin rotation from spin direction at IR (orbit -0.358019 mrad from orbit at IR) Future iterations of SuperB machine optics may give longitudinal spin direction closer to 180 o at the Compton IP from the spin direction at the IR. LNF or Tor Vergata ? The site choice is still ahead of us Many ingredients in the stew: technical, geological, financial, psychological, (geo)political, David Hitlin
SuperB Workshop Frascati Dec. 4, 2009 8 Detector - DGWG A variety of studies using the developing simulation tools have sharpened the discussion on detector geometry Two thrusts Optimization of core systems: SVT layers, DCH length, EMC endcap position, IFR layers, steel Study of the physics contribution of new systems Forward PID Backward EMC veto On what time scale and to what configuration does this process converge? White Paper TDR David Hitlin SuperB Workshop Frascati Dec. 4, 2009 9 TOFlike PID ~10% X0 ~30% X0 Detector backgrounds The October crisis has been resolved It was a false alarm, but it focused effort on the problem and improved our understanding of the limitations of changes in the machine (IR design, beampipe radius, asymmetry, ) in solving the problem Primary handles are beampipe radius, field manipulation inside the detector, SVT technologies and layer thickness There are still serious issues to be addressed SVT data bandwidth constraint Cluster multiplicity depends on technology New concern is pair production EMC barrel backgrounds due to long CsI decay time Lack of manpower in background simulation is a problem Requires stepped up participation from detector systems Generate full simulation radiative Bhabha background frames in January David Hitlin SuperB Workshop Frascati Dec. 4, 2009 11 Physics Many interesting analyses are being done, particularly in the service of the DGWG activities Estimates of SuperB capabilities are becoming more
realistic Providing guidance to detector design There is a strong need for a large generic decay sample in order to go further with very rare decays Simulation, MC production Large February production seems to be on track Goal is ~1 ab-1 includes generics in fast simulation Need to ensure that events are generated with correct boost Accelerator v 10 = 0.23 Longitudinal polarization for taus, if possible (3770) sample for CP studies (?) Background frames in full simulation Involvement from many institutions Next generation production (10 ab-1 ?) will likely be GRID -enabledSuperB Workshop Frascati David Hitlin Dec. 4, 2009 12 Manpower A constant theme is lack of manpower Despite this, a remarkable amount has been achieved There has been some success in adding manpower using project funds, but this has gone more slowly than we had hoped There have been very helpful additions of effort to the accelerator and detector efforts (Krakow most recently) David Hitlin SuperB Workshop Frascati Dec. 4, 2009 13 Project Board Meeting Preliminary Agenda: 1. Recap of the background and boost discussions at last Project Board, and report on results of new homework [FF] 2. Recap of the Accelerator parameter discussions at last Project Board, and report on recent homework on the parameter set, the machine circumference, changes to boost and headroom and flexibility. [JS] 3. Discussion of the White Paper status, and guidelines for the next 4. 5. 6. months [JS, FF/BR, MM, CS/ST, MG] 2010 Calendar Review. [MG]
Web page issues. [DH] Report to Project Board on plan to develop a proposal for input to INFN leadership following project approval, on "a credible project structure", and an invitation to provide input [MG]Hitlin David SuperB Workshop Frascati Dec. 4, 2009 14 2010 January Su M Tu W Th February F Sa 1 2 Su March M Tu W Th F Sa 1 2 3 4 5 6 Su M Tu W
20 21 22 20 21 22 23 24 25 26 25 26 27 28 29 30 23 24 25 26 27 28 29 27 28 29 30 30 31 Elba Please enter meetings/workshop activities into the central SuperB calendar by providing theNote that information to Lucia Lilli Frascati July Su
M Tu W August September Th F Sa Su M Tu W Th F Sa 1 2 3 1 2 3 4 5 6 7 Su M Tu W Th F Sa 1 2
26 27 19 20 21 22 23 24 25 24 25 26 27 28 29 30 28 29 30 26 27 28 29 30 31 meeting has been moved forward to September Caltech 31 David Hitlin SuperB Workshop Frascati Dec. 4, 2009 15
Next steps We await the outcome of the intensive efforts by INFN with the Science/Education and Treasury Ministries to secure project approval Our colleagues at KEK are in the midst of a government review Director Suzuki has issued a broad appeal for support from the international community Individual expressions of support are appropriate and useful Perhaps the next time we convene in Annecy, we will find ourselves working on an approved SuperB project This would present us with the welcome problems of formation of a formal detector/physics collaboration, gathering resources, both manpower and financial, and the process of distributing responsibilities for detailed design and construction in the context of a set of formal Technical Design Reports David Hitlin SuperB Workshop Frascati Dec. 4, 2009 16 While we wait This is not the Workshop group photo This is the vanguard of the group that will establish world peace through the use of the (non-Abelian) unified field of consciousness (c.f. John Hagelin [Transcendental Meditation]) The group is to grow to 8000, and, to ensure a safety factor, then to 16,000, increasing the world peace effect by 4 times By this yardstick, perhaps our efforts are not so quixotic http://www.vedicpandits.org/technology-creating-effect.html David Hitlin SuperB Workshop Frascati Dec. 4, 2009 17 The Project Board will meet in the Directors Conference Room (Building 1, second floor) at 1545 David Hitlin SuperB Workshop Frascati Dec. 4, 2009 18 David Hitlin SuperB Workshop Frascati Dec. 4, 2009 19
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