BaBar e SuperB CdS,

Transcription

1 BaBar e SuperB CdS, Fisica del Flavour e Violazione di CP Risultati di BaBar SuperB: dal CDR al TDR R&D in GR1 e GR5 Preventivi preliminari

2 Standard Model: CP 3 Flavors W + gv ij q i = u, c, t q j = d, s, b V = V V V ud cd td V V V us cs ts V V V ub cb tb b W V ub u CP mirror b W V ub + u a phase in the CKM matrix V ij violates CP! BaBar & SuperB - CdS - L.Lanceri 2

3 Asymmetric-energy e + e - collider E CM = GeV ( e + e ( 4S) BB ) 1nb=10 33 cm 2 Electrons: E = 9.1 GeV, I = 2.0 A Positrons: E = 3.0 GeV, I = 3.2 A Peak luminosity: L = cm -2 s -1 = = 12 events nb -1 s BaBar & SuperB - CdS - L.Lanceri 3

4 Integrated luminosity (4S): 466,000,000 BB recorded Y(3S): 30.2 fb -1 Y(2S): 14.5 fb -1 above Y(4S): ~5 fb BaBar & SuperB - CdS - L.Lanceri 4

5 BaBar results Many topics in CP and flavor physics B decays, CP asymmetries A CP B decay rates & branching fractions Charm decays, D 0 -D 0 mixing lepton decays Spectroscopy of bound quark states, QCD Activities in Trieste Detector: SVT V cb from B D * l A CP in B D * D *, D 0 h 0 D 0 -D 0 mixing >320 publications PRL 165 PRD 66 PRD(RC) BaBar & SuperB - CdS - L.Lanceri 5

6 From CP asymmetries ( 4S) BB events events with b cc s (7 modes) 75% purity S = sin2 = ± ± B and B behave differently! beautiful interference pattern observed, as predicted by the Standard Model new physics? (i.e. SUSY models) should appear in rare suppressed decays Example: ( 4S) BB events 340 ± 32 B D 0(*) CP h 0 events S = 0.56 ± 0.23± BaBar & SuperB - CdS - L.Lanceri 6

7 to spectroscopy "Observation of the bottomonium ground state in the decay Y(3S) b submitted to the Physical Review Letters and the archives (arxiv: ) BaBar & SuperB - CdS - L.Lanceri 7

8 SuperB? Flavour & CP: NP searches R&D per TDR

9 A.Stocchi, Elba meeting Special specific meeting to answer the IRC questions on physics and sharpen the physics case 3 Chapters : Physics Case Detector Machine 49 signers ~24 institutions 444 pages 320 signers ~80 institutions 9

10 Interplay between metrology and NP sensitivity A.Stocchi, Elba meeting Today SuperB+Lattice improvements = ± = 0.344± Improving CKM is crucial to look for NP = ± = ±

11 Possible golden channels for NP Lepton Flavor Violation Channels with NP (virtual) reach with cm -2 s BaBar & SuperB - CdS - L.Lanceri 11

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14 Machine Parameters (slightly different from CDR) Baseline 150m needed for Polarization LEB HEB Circumference in CDR was 2200 m Asymmetric bunch size to optimize beam lifetime (Toushek effect) BaBar & SuperB - CdS - L.Lanceri 14 F.Forti, Elba meeting

15 International context: US BaBar & SuperB - CdS - L.Lanceri 15

16 The project is currently in the machine feasibility dominated era Extract all possible indications from the Frascati test Focus on machine issues A Regional project Cern strategy session ECFA assessment A Global project Likely only one last generation B factory for the world community ICFA assessment The international governance naturally extends outside Europe R.Petronzio, Elba meeting After ELBA meeting Form a minimac to focus on criticalities Jonathan Dorfan chair Together with minimac elaborate a list of tasks for a Technical Design Team responsible for the final TDR Make an MOU with laboratories/institutions for the organization of the Design Team Possible timescale for international agreements The Mou for the Design Team by the end 2008 beginning 2009, after a first assessment from ECFA and a presentation to the Cern strategy session The Mou for construction committment after Italian Government approval, with negotiations starting by middle BaBar & SuperB - CdS - L.Lanceri 16

17 R&D per vertex detector da SLIM5 (Gr5) a P-SUPERB (Gr1) + VIPIX (Gr5) P-SUPERB: Layer interno (diametro 2 cm) Alternative: MAPS, pixels con bump-bonding, striplets P-SUPERB: Layer esterni Microstrip tradizionali VIPIX (Gr5) Pixels a integrazione verticale, substrato alta resistività

18 Estrapolazione da R&D in Gr5 (SLIM5) First part of the session devoted to the readiness for the SVT Testbeam (Sept. T-1,2,3,4 :reference telescope modules S 2 S3 T-4,3 Striplets-2 MAPS-1 MAPS-2 Striplets-1 T-2,1 beam S1 Main goals: DNW MAPS matrix resolution & efficiency Thin (200 um) striplets module with FSSR2 readout chips (baseline option in the CDR) Demostrate LV1 copability with tracker information sent to Associative Memories New DAQ system developed for data push architecture All the parts are getting ready: CMOS MAPS chip with sparsified readout received and tested (G.Rizzo) Beam telescope and striplets module in preparation (L. Vitale) DAQ system under test (M. Villa) Reco Software under development (N.Neri) BaBar & SuperB - CdS - L.Lanceri 18

19 Percentuali e budget preliminari BaBar & SuperB - CdS - L.Lanceri 19