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Villars 2004. Report on the SPSC Villars Meeting September 22-28 2004 John Dainton University of Liverpool, GB (on behalf of the SPSC). Villars 2004. Framework Machines and Beams Heavy Ions Neutrinos Soft and Hard Protons Antiproton Physics Flavour Physics Other Topics Summary. - PowerPoint PPT Presentation

Transcript of Villars 2004

  • CERN: b-beam baseline scenario

    PS

    SPS

    P. Zucchelli, Phys. Lett. B, 532 (2002) 166-172

    John DaintonVillars 2004October 7th 2004CERN seminar

    Megatonne ?

  • CERN to FREJUS

    CERN

    John DaintonVillars 2004October 7th 2004CERN seminar

    13CP sensitivityTowards NF Horizon SPL superbeam ?

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPL Proposed RoadmapConsistent with the content of a talk by L. Maiani at the Celebration of the Discovery of the W and Z bosons. Contribution to a document to be submitted to the December Council (CERN Future Projects and Associated R&D).Assumptions:construction of Linac4 in 2007/10 (with complementary resources, before end of LHC payment)construction of SPL in 2008/15 (after end of LHC payments)Linac 4 approvalSPL approvalLHC upgradeR. GarobyWarning: Compressor ring and detector (8 years) are not quoted Protons from the SPL ready in 2015Gilardoni

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPL SuperBeam FAQQ: Why 2.2 GeV for the proton driver?A: First design of the SPL which used the LEP cavities.

    Q: What about increasing the proton energy ?A:Possible up to 3.5 GeV- 4 GeV with some caveats. Energy optimization to tune the proton beam energy is in working stage (see next slides).

    Q: Is the SPL SuperBeam strongly connected with the Frejus?A: Yes, due to low energy of proton beam no way to go further than 130 km.

    Q: What if instead of a Cherenkov detector one wants to use a Liquid Argon TPC ?A: Possible if the experts are interested in the location (meaning not going to Japan)Gilardoni

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPL SuperBeam FAQQ: Why proposing the SPL Superbeam if JHF will have similar results?A1: Unique synergy with the Beta Beam

    A2: Learned from the Japanese style of working, and also from CERN style, every step carries the know-how for the next step. The next could be a NuFact.A3: Different condition to repeat the same measurement. In particular different background.

    Gilardoni but not first

    John DaintonVillars 2004October 7th 2004CERN seminar

    Proton Driver expensive likelihood improves with synergy beam R&D for new technology- target- cooling (MICE) e - beam - superbeam Fact

    Mezzetto

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPSC physics has noble history at CERN physics is in a new golden era - CERN beginning again pivotal global role CNGS commitment to ~ end of decade vital - 2006 important: COMPASS then CNGS @ end 06 - CNGS crucial up to 2011 (window @ 4.5x1019pot/yr) - CNGS + COMPASS ? multi-turn xtraction longer running period - no compelling case for extending CNGS beyond 2011 @ realisable pot/yr (< ~ 3x 4.5x1019pot/yr)C2GT

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPSC Future neutrino facilities offer great promise for fundamental discoveries (such as CP violation) in neutrino physics, and a post-LHC construction window may exist for a facility to be sited at CERN.

    CERN should arrange a budget and personnel to enhance its participation in further developing the physics case and the technologies necessary for the realization of such facilities. This would allow CERN to play a significant role in such projects wherever they are sited. A high-power proton driver is a main building block of future projects, and is therefore required. A direct superbeam from a 2.2 GeV SPL does not appear to be the most attractive option for a future CERN neutrino experiment as it does not produce a significant advance on T2K. We welcome the effort, partly funded by the EU, concerned with the conceptual design of a -beam. At the same time CERN should support the European neutrino factory initiative in its conceptual design.

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPSC Detectors new detector technologies are necessary to take full advantage of the physics capabilities of future neutrino facilities. Examples of needed advances are cheaper, higher efficiency, large-area, light sensors and magnetized detectors capable of distinguishing electrons from positrons. Given its central role as Europes particle physics laboratory, CERN should support, participate, and coordinate such technical developments. Further hadron production experiments specifically designed to meet the needs of neutrino experiments are essential. There are several existing CERN detectors which could, with some modifications, fulfill this requirement. This would be a scientifically important and cost-effective use of CERN resources.

    John DaintonVillars 2004October 7th 2004CERN seminar

    5. Soft and Hard ProtonsDHose, DiehlGasser, GninenkoMagnon, MalvezziNemenov, PaulPolyakov, SeymourVestzergombi,pivotal role of CERNThe stuff of Nobel Prizes !

    John DaintonVillars 2004October 7th 2004CERN seminar

    Hadron PhysicsH1 ZEUS - DESYGSI energy frontier colliders

    precision frontier colliders + FT

    intensity frontier

    theoretical symbiosis- lattice- ChPT- pQCD BABAR - SLAC CDF D0 - FNAL

    John DaintonVillars 2004October 7th 2004CERN seminar

    COMPASS 1996: proposal 1997: conditional approval 1999 2000: construction and installation 2001: commissioning run 2002 -2004: data taking p and p precision hadron structure- nucleon spin structure (valence sea) precision hadron dynamics - pQCD n-pQCD (Q2 pT2) - resonant phenomena into the future: GPDs and precision st. functions

    gluons approved

    John DaintonVillars 2004October 7th 2004CERN seminar

    COMPASS G/Gfinding charmcc(G/G) proposal = 0.142002+3+4(G/G) = 0.24-G/G from high pT hadrons pairs

    John DaintonVillars 2004October 7th 2004CERN seminar

    COMPASS Hadron (2004)PT: Primakoffresonance -diffractive - Primakoff - central: glue enriched (WA102 ) - D* Ds* (FOCUS, BABAR, Belle, CLEO, SELEX) - c* - cc localised (cc) excitation against light u/d270 GeV p + vertex detector150 days/year 2006-2010

    John DaintonVillars 2004October 7th 2004CERN seminar

    COMPASS beyond DIS: forward * Compton- pdf(x,t)dtDVCS: * Compton- pdf(x,t)- p tomography ? partons across punpolarisedpolarised

    d-d Diehl-relevant at the time?

    John DaintonVillars 2004October 7th 2004CERN seminar

    DIRACatomic pairsfree pairs and K atoms - scattering lengths - PT data 2001 2003 (PS) setting up 2006 (PS) running 2007/8 (PS) planning > 2008 (SPS ?) excess at very small pL and pT experimental = theoretical uncertainty @ SPS Ke decay

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPSC FT hadron program remains very competitive COMPASS complete in medium term- G/G- transversity, polarisability, spectroscopy- SPSC p.o.t. concern prioritise COMPASS longer term- GPD measurements would be unique DIRAC physics important SPS (accuracy) hadron resonances (pQ) in existing NA49 not compelling

    John DaintonVillars 2004October 7th 2004CERN seminar

    SPSC FT 2006: optimise running

    - start early data for COMPASSoptimise data-taking efficiency

    - run til CNGS ready

    FT > 2006 encourage multi-turn Xtraction

    FT >> 2006- intense @ CERN new lepton-hadron DIS

    John DaintonVillars 2004October 7th 2004CERN seminar

    6. Antiproton PhysicsBeloshitzkyGabrielse, HangstHayano, JungmannKostelecky, QuintRegenfus, TesteraWidmann, Yamazaki

    John DaintonVillars 2004October 7th 2004CERN seminar

    Unique Physics at CERN ASACUSA ATRAP ATHENA- routine production of H - antiprotonic He = p e -

    deceleration and capture of p production of H and He- yield ! spectroscopy; ideally 1s 2s- presently quantum state: n~30 !----CPT matter-antimatter

    John DaintonVillars 2004October 7th 2004CERN seminar

    Unique Ac DeceleratorGatignon

    John DaintonVillars 2004October 7th 2004CERN seminar

    ATRAPfibers77 KBGO77 Kantiprotonspositronsourcepositron trapsantiproton trapsrotating electrode5.3 Teslamagnetic field4.2 KHarvard: Trap, vacuum, rf electronics, Juelich: Scintillation detectors Small View trap and detectorsGabrielse

    John DaintonVillars 2004October 7th 2004CERN seminar

    ATHENA annihilation of e+ and p- detects H

    insensitive to H velocity and state--

    John DaintonVillars 2004October 7th 2004CERN seminar

    ASACUSABalmer lines+ Qp/Mp TRAP@LEARHayano

    John DaintonVillars 2004October 7th 2004CERN seminar

    Cooling before Capture+ R&D developmentsHayano

    John DaintonVillars 2004October 7th 2004CERN seminar

    Precision Spectroscopy antiprotonic spectroscopy

    - large nHayano

    John DaintonVillars 2004October 7th 2004CERN seminar

    Improvements: ATRAPStatus: 4.2 K antiprotons are routinely accumulated cooling thru matter

    Improvements? Needed: much lower temperatures Desired: more antiprotons to speed data accumulation Desired: more antiprotons to improve spectroscopy signal-to-noise

    Decelerator? RFQD? ELENA? would give the much larger antiproton rate desired small ring would fit in AD hall new beam lines would be needed magnetic fields from experimental apparatus substantial costGabrielse new experimemts AEGIS ALPHA coming

    John DaintonVillars 2004October 7th 2004CERN seminar

    ELENA A small machine for deceleration and cooling of antiprotons after AD to lower energies around 100 keV is feasible. One to two orders of magnitude more antiprotons can be available for physics. Main challenges for the low energy decelerator like ultra low vacuum, beam diagnostics and effective electron cooling can be solved, using experience of AD and member-state laboratories where similar low energy ion machines are operational (ASTRID, Aarhus; CRYring, Stockholm). The machine can be located inside of the AD Hall with only minor modifica