Higgs beyond LHC : Experiments

Facing the scalar sectorFacing the Scalar SectorBrussels, 29-31 May 20131FUTURE MACHINESPatrick JanotToday At least four evidence for New PhysicsNon Baryonic Dark Matter Accelerated Expansion of the UniverseBaryon AsymmetryNeutrino Masses

But we dont really know the New Physics energy scale(s)The Standard Model is as alive as everLEP/SLC/Tevatron : Electroweak precision measurementsLHCb : Rare decaysCMS/ATLAS : A very standard scalar sector (so far)CMS/ATLAS : No (other) discovery below the TeV range

Question : Is Particle Physics at the Energy Frontier over ?If not : How do we look for the next energy scale ?

Facing the Scalar SectorBrussels, 29-31 May 20132A. Hoecker

F. TeubertJ. Ellis et al.(G. Tonelli)(A. Strumia)

P. GiacomelliJ. AlcarazPatrick Janot5/31/132Yesterday A look to the past decades : what were the right machines ?1970-1990Precision measurements of neutral currents : predicted mW and mZThe CERN SppS (UA1, UA2) discovered the W and the ZThe CERN LEP (and SLC) nailed the gauge sector

1990-2000Precision measurements of the gauge sector at LEP/SLC : predicted mtopThe FNAL Tevatron (CDF, D0) discovered the top A collider to nail the top sector ?

1995-2015Precision measurements of mW and mtop (LEP, TeVatron) : predicted mHThe CERN LHC (CMS, ATLAS) discovered the SM scalarA collider to nail the scalar sector ?

Facing the Scalar SectorBrussels, 29-31 May 20133-Patrick JanotTomorrow Perpetuating a 40-years-long tradition ?2025-2050Next Facility: Precision measurements of EWSB sector (W, Z, t, H)Predict New Physics scaleNext-to-next facility : discover New PhysicsThen, will need to nail this New Physics

Questions : What parameters should we measure to probe BSM Physics ?What precision should we aim at ?What energy scale should we aim at to look for BSM Physics ? and have a reasonable chance to find it ?What is (are) the best accelerator(s) to achieve these goals ?Both for precision measurements and the BSM Physics direct search and when should we decide the right path ?Facing the Scalar SectorBrussels, 29-31 May 20134J.M. FrrePatrick Janot

Parameters (I) : Scalar PropertiesHighest-priority recommendation from European StrategyFacing the Scalar SectorBrussels, 29-31 May 20135c) The discovery of the Higgs boson is the start of a major programme of work to measure this particles properties with the highest possible precision for testing the validity of the Standard Model and to search for further new physics at the energy frontier.

The LHC is in a unique position to pursue this programme. LHC HL-LHC End date20212030-35?NH1.7 x 1071.7 x 108DmH (MeV)10050gH/gH6.5 5.1%5.4 1.5% gHgg/gHgg11 5.7%7.5 2.7%gHww/gHww5.7 2.7%4.5 1.0%gHZZ/gHZZ5.7 2.7%4.5 1.0%gHHH/gHHH--< 30% gH/gH1011 b,c,t)Yes (T,L)~1/100< 0.1 MeVs ~ 2mW#W pairs / yearPolarizationError on mWFew dozensNo220 MeV2105Easy7 MeV2.5107Yes (T)0.5 MeVs = 240 GeVOku-W# W pairs / 5 yearsError on mW410433 MeV41063 MeV21080.5 MeVs ~ 350 GeVMega-Top# top pairs / 5 yearsError on mtopError on lt 100,00030 MeV40%500,00013 MeV15%

Asymmetries, LineshapeWW threshold scanWW productiontt threshold scan

TLEP : Repeat the LEP1 physics programme every 15 mn Transverse polarization up to the WW thresholdExquisite beam energy determination (10 keV)\ Longitudinal polarization at the Z poleMeasure sin2W to 2.10-6 from ALR-

Patrick Janot

Performance Comparison (9)lkjfsFacing the Scalar SectorBrussels, 29-31 May 201326

TLEPTLEPILCmH=126 GeVWarning : indicative only.Complete study being doneVery stringent SM closure test.Sensitivity to weakly-interacting multi-TeV BSM Physics.Patrick JanotThe Next-to-Next Facility (1)Geared towards New Physics Discovery (hinted at by precision studies?)All existing projects do have an energy-frontier upgrade programmeLHC 7 TeV will be upgraded to LHC 14 TeV in 2015And possibly to HL-LHC (14 TeV) in ~2025

Take-home (simplified) messages : 1) Absence of discovery at LHC-14 wipes out SUSY below 700 GeV+And below several TeV for non-SUSY New Physics2) No excess at LHC-14 makes a discovery quite unlikely at HL-LHC3) Energy does better than luminosity for direct search for New PhysicsFacing the Scalar SectorBrussels, 29-31 May 201327

P. Giacomelli Patrick JanotThe Next-to-Next Facility (2)ILC350 can be upgraded to ILC500And possibly to ILC1000Could discover New Physics below 500 GeV (via pair production)Air might get extremely thin after three years with LHC-14.Take-home messages New Physics discovery potential of ILC will be quite limited, even at 1 TeVIt is essential to wait for the LHC-14 results before engaging in ILCAppropriate decision time is the next European Strategy updateDiscoveries at LHC-14 might point to the need of a 3-TeV e+e- machine (CLIC)Only if some kind of New Physics is found below 1.5 TeVLots of R&D still needed towards a TDR100 MV/m accelerating gradientVery small beam size (1 nm)Very short bunches (150 ns)Ultra-precise alignmentMagnet stabilizationLarge wall plug power (600 MW)Facing the Scalar SectorBrussels, 29-31 May 201328Energy CM (GeV)5003000Luminosity (x1034cm-2s-1)2.35Beam size (sx/sy nm)202/2.340/1Pulse duration (ns)177155Beam power (MW)4.914Total AC power (MW)270589Patrick Janot

The Next-to-Next Facility (3)TLEP can be upgraded to VHE-LHCRe-use the 80 km tunnel to reach 80-100 TeV pp collisionsOr re-use the LHC tunnel to reach 27-33 TeV pp collisionsIn both cases, need to develop 16-20 T SC magnetsNeeds lots of R&D and time (TLEP wont delay VHE-LHC)First consistent conceptual designUsing multiple SC materialsFacing the Scalar SectorBrussels, 29-31 May 201329

L. Rossi 20 T field!Could explore higher-energy regions (up to 10 TeV and more)Detailed conceptual study of the machine is neededIntense collaborative R&D is necessaryPhysics case must be better understoodPatrick JanotThe Next-to-Next Facility (4)Performance comparison for the SM scalar Measurement of the more difficult couplings : gHtt (Yukawa) and gHHH (self) In e+e- collisions

In pp collisions Facing the Scalar Sector30

HHM. ManganoBrussels, 29-31 May 2013

HHHHE-LHCVHE-LHCPatrick Janot

Performance comparison for the SM scalar (contd)Only ttH and HHH couplingsOther couplings benefit only marginally from high s

VHE-LHC : Largest New Physics reach and best potential for gHtt and gHHH

The Next-to-Next Facility (5)Facing the Scalar Sector31s, NPs, NPILC500, HL-LHC ILC1TeV, HE-LHC CLIC3TeV, VHE-LHC(NP=New Physics reach)HF2012Brussels, 29-31 May 2013TLEP

J. Wells et al.arXiV:1305.6397Patrick JanotScalar Factories : SummaryFacing the Scalar SectorBrussels, 29-31 May 201332Higgs FactoriesCircular ColliderLinear Colliderg-g ColliderMuon ColliderPlasma WakefieldTechnical MaturityProj launch/First beam2020/2030 2018/20272025/2035??Engineered design readiness

/ ILC / CLIC

Size (km)27-8013-50101.5(0.3)2.5Cost (BCHF)[kCHF/Higgs] []7-8 [3] [] 8-10 + site [150]???Power (MW) Consumption280128-235?200133EWSB Precision Measurements

/ Limited / NoneNone?Scalar Precision MeasurementsSub-per-cent / Few per-centLimitedLimited?Energy (TeV)Upgradability100 p+ / 0.5 - 1 / 31-23-63Power @ Emax~200~600?~280~320Patrick JanotConclusionsDiscovery of H(126) and European Strategy brought momentumNews ideas emerging for scalar factories and beyondProspects for the future look very promisingIt is important to choose the right machine for the futureCannot afford to be wrong for 10 billion CHF it would be the end of HEPResults of the LHC run at 14 TeV will be a necessary and precious inputTowards an ambitious medium and long term vision for HEP and EuropeDecision to be taken by 2018

Facing the Scalar SectorBrussels, 29-31 May 201333Patrick JanotConcluding RemarksDiscovery of H(126) and European Strategy brought momentumNews ideas emerging for scalar factories and beyondProspects for the future look very promisingIt is important to choose the right machine for the futureCannot afford to be wrong for 10 billion CHF it would be the end of HEPResults of the LHC run at 14 TeV will be a necessary and precious inputTowards an ambitious medium and long term vision for HEP and EuropeDecision to be taken by 2018Today, I believe TLEP to be the best complementary machine to LHCUnrivaled precision for scalar properties and EWSB measurementsWith low risk : Based on a very well-known technologySupported by much progress in e+e- circular factories for 20 years (and counting)A first ambitious step in a long-term vision for high-energy physicsWith many synergies with VHE-LHC (pp collisions at 100 TeV)Tunnel, accelerator, experiments, physics

Facing the Scalar SectorBrussels, 29-31 May 201334An intense design study must go on until 2018Accelerator / Experiment / PhenomenlogyMore info at http://tlep.web.cern.chPatrick JanotConcluding RemarksDiscovery of H(126) and European Strategy brought momentumNews ideas emerging for scalar factories and beyondProspects for the future look very promisingIt is important to choose the right machine for the futureCannot afford to be wrong for 10 billion CHF it would be the end of HEPResults of the LHC run at 14 TeV will be a necessary and precious inputTowards an ambitious medium and long term vision for HEP and EuropeDecision to be taken by 2018Today, I believe TLEP to be the best complementary machine to LHCUnrivaled precision for scalar properties and EWSB measurementsWith low risk : Based on a very well-known technologySupported by much progress in e+e- circular factories for 20 years (and counting)A first ambitious step in a long-term vision for high-energy physicsWith many synergies with VHE-LHC (pp collisions at 100 TeV)Tunnel, accelerator, experiments, physicsR&D for next-generation acceleration techniques should proceede.g., plasma acceleration towards the next big step in energy

Facing the Scalar SectorBrussels, 29-31 May 201335An intense design study must go on until 2018Accelerator / Experiment / PhenomenlogyMore info at http://tlep.web.cern.chPatrick JanotA big Thank You to All participants and speakers The Solvay Institutes and their director, Marc HenneauxThe Belgian Science Policy (IAP program) The program committeeBarbara Clerbaux, Jorgen Dhondt, Jean-Marie Frere, Jean-Marc Gerard, Thomas Hambye, Eric Laenen, Jean Orloff, Alexandre Sevrin, Petr Tinyakov, Michel Tytgat, Nick van Remortel And in particular for the meeting organization:Barbara Clerbaux, Thomas Hambye, and Michel Tytgatfor the practical organization:Fabio Capela , Xiaoyong (Yong) Chu and Mikael Dhen And, of course, the conference secretariesIsabelle Renders, Isabelle van Geet

Facing the Scalar SectorBrussels, 29-31 May 201336

Patrick JanotSoundJay.com Sound Effectsnull13656.0