Journées de Prospective Beyond the Standard Model Journées de Prospective Giens April 2, 2012 Dirk Zerwas LAL Orsay Beyond the Standard Model Higgs Supersymmetry Alternatives to supersymmetry Conclusions on behalf of the BSM group (Groupe-2)

Beyond the Standard Model Higgs Higgs portal: add a hidden sector If the Higgs is at 125GeV: 2-parameter model: ΔH = cos2χ , Γhid LHC: BR=0.60 excl. 2012 ILC: BR=0.02 (±0.005) ΔH: 5fb-1 20fb-1 14TeV 3000fb-1 ILC 15% 10% 5% <1% If no Higgs is observed with the LHC 14TeV 30fb-1 non-observation of Higgs boson does not exclude its existence

Supersymmetry fermion boson has “no” problems with radiative corrections (quadrat. div.) has a light Higgs Boson (<140GeV) interesting pheno at the TeV scale 3 (or more) neutral Higgs bosons: h, A, H 1 (or more) charged Higgs boson(s): H± and supersymmetric particles Many different models: MSSM (low scale many parameters) mSUGRA (high scale few parameters) DSS (SUSY with heavy scalars) GMSB AMB Additional (s)particles: NMSSM MRSSM/N=1/N=2 hybrid and many more spin-0 spin-1/2 spin-1 squarks: qR, qL q gluino: g g sleptons: ℓR, ℓL ℓ h,H,A neutralino χi=1-4 Z, γ H± charginos: χ±i=1-2 W± ~ ~ ~ ~ ~ R-parity production of SUSY particles in pairs (Cascade-) decays to the lightest SUSY particle LSP stable, neutral and weakly interacting: neutralino (χ1) experimental signature: missing ET

Supersymmetry: neutral Higgs bosons Higgs sector: mass of A, tanβ (vev ratio) tanβ ↑: g(Hτ,b) ↑ D0: final states with τ and bbb ATLAS and CMS: tau pair final states mA ↑ cross section ↓ large exclusion with 4.6fb-1 SM-like h mA up to 500GeV, tanβ down to 10

Supersymmetry: charged Higgs boson Signature for m(H±) <m(top) top pair production increase decays of top to tau larger transverse mass no excess  exclude as function of BR Interpretation in the MSSM: Exclude down to 2%

Supersymmetry: Rare Decays Courtesy of flavour group: Indirect constraint Bμμ: MFV in yukawa sector BR small: |Vtb* Vtq|2 SUSY Higgs s-channel tanβ ↑ BR ↑ LHCb and CMS: mass peak BR(Bsμμ) < 4.5e-9 (CMS:7.7e-9) BR(Bμμ) < 1e-9 (CMS: 1.7e-9)

Search for Supersymmetry: gluinos and squarks Signature: colored particles  large (pb) cross sections many high transverse momentum jets large missing ET Measure background from data (CRs)/ Extrapolate sensitive variable many cross checks possible no exciting deviations  Equal squark and gluino masses: 1.4TeV

Search for Supersymmetry: 3rd generation CMS: inclusive b-tagged analysis 3rd generation: large mixing possible could be lightest squarks mSUGRA (cascade) MSSM (direct) ATLAS sbottom pair production: 2 b-tagged jets missing ET 14TeV: sensitivity to 2.5TeV colored sparticles SLHC: 3TeV colored sparticles ILC: small mass differences Exclusion up to 400GeV 5fb-1: sensitivity up to 1TeV

Search for Supersymmetry: Electroweak Sector Signature: associated production of charginos and neutralinos supersymmetric version of WZ (difficult) leptonic decays  3(and more) leptons (muons,e) missing ET Example: Expect 26±5 Observe: 32  MSSM limits: improve on LEP LHC: difficult scenario: limits of order 300GeV obtained with increased leptonic BRs (intermediate sleptons) ILC: less dependence on BRs reach down to small mass differences

Measure Supersymmetry LHC: 5% level mass measurement SLHC: improve to 1% ILC: electroweak sector measurements precision 0.1% LHC: 12fold ambiguity ILC: solves ambiguities LHC LHC: hint on Parameter unification SLHC: increases precision ILC: “measurement” of unification S-LHC + ILC Dark matter (deduced): LHC: % level with ambiguities ILC: 0.1% level

Alternatives to Supersymmetry Search for new physics: virtual effect: deviations from the Standard Model real effect: decay of a resonance Sequential standard model: Z’, W’ heavier version of Z and W Modify couplings to get other variants Search for a resonance Randall Sundrum (RS): warped Extra Dimensions 1 additional dimension (compactified) Search for a Graviton resonance decay: ee,μμ,γγ (mass reconstruction) Arkani-Hamed, Dvali, Dimopoulos (ADD): N ExtraDim macroscopic (LED) Search for deviations wrt Drell-Yan

New Gauge Bosons Signature: Z’ decay to lepton (e,μ) pairs bump in mass spectrum W’ decay to lepton+neutrino different models different couplings LHC 5fb-1 7TeV: limit at 2.3TeV (Z’SSM) limit at 2.3TeV(W’SSM) 100fb-1 14TeV: discovery up to 4.5/5.5TeV

Excited Quarks Signature: jet-jet decay bump in mass spectrum LHC 5fb-1 7TeV: excited quarks: M> 3.35 TeV colour octet scalars M> 1.94 TeV mini-QBH with (6 extra dimensions): quantum gravity scales > 3.96 TeV quark contact interactions Λ > 7.8 TeV LHC 14TeV: double the reach in mass contact interaction (ll 100fb-1): 31TeV

Extra dimensions LHC 2.3fb-1 7TeV: LHC 5fb-1 7TeV: ADD Ms: scale of onset of quantum gravity n: number of extra dimensions LHC 5fb-1 7TeV: 2.1TeV for k/Mpl=0.1 (leptons) 900GeV for k/Mpl=0.01 (photons) (hierarchy) prejudice: reduced Planck scale <10TeV mass of first Graviton excitation LHC 30fb-1 14TeV (diphotons): discovery 3.95TeV for k/Mpl=0.1 discovery 1.6TeV for k/Mpl=0.01

Conclusions Higgs looking promising easy SUSY easily excluded roughly >10% precision at LHC ILC would gain by factor 10 easy SUSY easily excluded difficult SUSY: more luminosity essential and going to 14TeV ILC: maximum impact for electroweak sector particles alternative models thoroughly studied discovery in the multi-TeV range still possible with LHC