Wrap-up: Session 1 Setting the scene : European Strategy for - - PowerPoint PPT Presentation
Wrap-up: Session 1 Setting the scene : European Strategy for Particle Physics Problems, Action items, Way forward LHC full exploitation & HL-upgrade, accelerator R&D, ILC, LBN Theory, Experiments with unique reach
1. SERI will continue to support CERN in financial, organisational, political and diplomatic matters, help facilitating international contacts (e.g. with the United Nations) and is willing to consider further special contributions. 2. SERI acknowledges the increased need for funding for the LHC high-luminosity upgrade-period 2014-2024 and will examine this request seriously for the BFI Bill 2017-2020. SERI is not the only funding source and a joint effort is needed. 3. If corresponding requests arrive, SERI is willing to include “Distributed and High Power Computing Activities” in the update process of our national roadmap for research infrastructures. 4. We note that SERI together with SNSF should consider increased funding in the FLARE program to permit sustainable Swiss participation in international astroparticle physics projects. 5. SERI has a vital interest that outreach and education should receive adequate funding and be recognized as a central component of the scientific activity. The seed funding of the “Verflixtes Higgs” by SERI is a first excellent example. 6. SERI presently investigates solutions to strengthen and coordinate technology
professionally including other international EIROforum organisations.
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Godot didn’t show up Godot may not show up Is this really a problem ? Wait for Godot Get used to the idea that we won’t meet Godot, just in case … Don’t quit ! Vladimir and Estragon envisaged to hang themselves with a belt … … but the belt broke during a stress test We should in addition prepare (enthusiastically) for the scenario where ΛNP >> 1 TeV
– Samuel Beckett got the Nobel Prize – I doubt there will be a Nobel Prize for showing that there is no BSM, but who knows ?
– (19+14)+43+54 = 130 is an impressive count – Diversity of research topics is also impressive – Keep diversity ! This is especially important in our « historical » context, where we wonder what our next big projects should be ...
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– « The results of the analysis of the 13–14 TeV data will tell us in 2018 whether to go for high energy or high precision » – « We don’t know which precision we need, so we go as precise as possible », i.e. guided by the available technologies ...
– the 2018 decision may not be obvious
– it may not make sense (or reasonable/affordable) to reach an arbitrarily high level of precision
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The 4 talks were mainly targeted at presenting an impressive number of new results. For this reason, typically no problems or action items were presented. However, it seems to be clear that both, the energy upgrade to the full design energy, and the high luminosity upgrade are eagerly awaited. Technical (accelerator related) Problems identified:
impact on beam quality
beams cause instabilities Action items: more R&D (already done at EPFL/CERN): crab cavities, advanced collimation systems, etc...
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readout bandwidth/limits in mechanical precision ...
(Talk about Clic: problems & actions include test of accelerating structures, wake-field simulations/monitors)
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LHC HL upgrades should be established soon. Decision in 2013 regarding LC in Japan?
accelerator physicist to Switzerland given than in the next decades accelerator physics R&D central for defining particle physics direction.
Argon Tube
Installed at Laboratorio Subterráneo de Canfranc (LSC)
hybrid PMT+APD TPC @ UZH
challenge in term of occupancy and background rates.
momentum resolution impact parameter resolution.
ECAL - 30 x 30 x 3 mm3 scintillator tile Hamamatsu MPPC coupled to side face (top on the plot) with optical grease 1x1 mm array 50 m pitch Gain: ~7.105 at 25 C
Demonstrator chip designed with fully functional 64x64 pixel matrix
65 nm CMOS technology Small pixel pitch (25 x 25 μm2) Simultaneous 4-bit ToA and ToT per pixel Front-end time slicing < 10 ns
100 chips delivered in February 2013
TDHCAL tests prototypes 1 m3 “Analog HCAL”: scintillator tiles 3x3 cm2 read-out with SiPM’s “Digital HCAL”: RPCs 1x1 cm2 + tail catcher (steel absorber)
CERN PS 1-10 GeV, CERN SPS 10-300 GeV test beam runs
SPIN @ ILC: threshold behaviour σ(e+e− → ZH) ∝ βJ+1 Self-coupling COUPLINGS
theory at a circular e+e- collider (A. BLONDEL)
A circular e+e- machine located in the 80km tunnel that will eventually contain also the VHE-LHC
LHC
+
ILC350 ILC1000 TLEP240 TLEP350
5% 5% 3% 2% 1%
Expected precision on the total width
LEP ILC TLEP √s ~ mZ Mega-Z Giga-Z Tera-Z #Z / year Polarization Precision vs LEP1/SLD Error on mZ,
2×107 Yes (T) 1 2 MeV Few 109 Easy 1/5 to 1/10 – 1012 (>1011 b,c,) Yes (T,L) ~1/100 < 0.1 MeV √s ~ 2mW #W pairs / year Polarization Error on mW Few dozens No 220 MeV 2×105 Easy 7 MeV 2.5×107 Yes (T) 0.5 MeV √s = 240 GeV Oku-W # W pairs / 5 years Error on mW 4×104 33 MeV 4×106 6 MeV 2×108 0.5 MeV √s ~ 350 GeV Mega-Top # top pairs / 5 years Error on mtop Error on t – – – 100,000 30 MeV 40% 500,000 13 MeV 15%
Precision tests of EWSB
Precision on couplings, cross sections, mass, width,
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no problem observed for Xenon 1T tubes, no clear understanding yet if it is a real issue;
various environments important: SiPM/APD or hybrid solutions are an important development since they work particularly well at low temperature(*)
infinitesimally small (3 um) single point resolution calorimeters.
renowned center (Darwin) for this technique serving DM, double beta and solar neutrino related topics. What techniques are needed for future accelerator programs is related to the selection of the future machines.
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time structure @short distances require precision measurements. Signs that it’s not sufficient are neutrino masses, non baryonic DM, matter-anti-matter asymmetry. Do we need more precise measurements and by how much to understand if there is something beyond SM? HL-LHC can say a lot on how many Higgs, what Higgs, SUSY, CP mixing(20%), couplings.
interactions reduce theoretical uncertainty on self interaction of Higgs, invisible width of Higgs.
expensive than TLEP? Circular collider long term strategy according to a multi-step program: TLEP, VHE-LHC to 100 TeV pp machine that leads to % level precision. But would TLEP path delay by 30 yrs the 100 TeV pp collider? My concern: Do we risk to kill any other project if we want to jump to the most expensive steps?
unbiased comparisons.
The way forward: keep thinking and R&D.
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– MEG BR (Mu to e gamma):
– Mu3e BR (Mu to eee):
– New physics, muon-electron (non)-universality, QED tests, QCD tests, spectroscopy,
– 1 μm precision achieved
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