What lies beyond the Standard Model Supersymmetry New

What lies beyond the Standard Model? Supersymmetry New motivations From LHC Run 1 • Stabilize electroweak vacuum • Successful prediction for Higgs mass – Should be < 130 Ge. V in simple models • Successful predictions for couplings – Should be within few % of SM values • Naturalness, GUTs, string, …, dark matter

Craig@LHCP

Sample Supersymmetric Models • Universal soft supersymmetry breaking at input GUT scale? – For gauginos and all scalars: CMSSM – Non-universal Higgs masses: NUHM 1, 2 • Strong pressure from LHC (p ~ 0. 1) • Treat soft supersymmetry-breaking masses as phenomenological inputs at EW scale – p. MSSMn (n parameters) – With universality motivated by upper limits on flavour-changing neutral interactions: p. MSSM 10 • Less strongly constrained by LHC (p ~ 0. 3)

Fit to Constrained MSSM (CMSSM) 2012 20/fb Allowed region extends to large m 0 Buchmueller, JE et al: ar. Xiv: 1312. 5250 p-value of simple models ~ 10% (also SM) m 0

Dark Matter Mechanisms • Many different mechanisms for bringing dark matter density into cosmological range • Not only conventional annihilation & freeze-out • Rapid annihilation through direct-channel resonances – Z, h, H/A, X(750), … • Coannihilation with some other, almostdegenerate sparticle – stau, stop, wino, sneutrino, … • Consider extending simplified model approach to include such possibilities

Dark Matter Density Mechanisms 2012 20/fb Buchmueller, JE et al: ar. Xiv: 1312. 5250 Estimated reach with Run 2 of the LHC Current LHC reach

Dark Matter in CMSSM, NUHM 1/2, p. MSSM 10 Current LHC reach Estimated future LHC reach Bagnaschi, JE et al: ar. Xiv: 1508. 01173

Long-Lived Stau in CMSSM, NUHM? Possible if mstau – m. LSP < mτ Generic possibility in CMSSM, NUHM (stau coannihilation region) CMSSM 2012 NUHM 1 Estimated future LHC reach Current LHC reach τstau > 103 s gives problems with nucleosynthesis τstau > 10 -7 s gives separated vertex signature for τ-like decays Bagnaschi, JE et al: ar. Xiv: 1508. 01173

Exploring gluinos, squarks @ LHC 20121 520/fb p. MSSM 10 De Vries, JE et al: ar. Xiv: 1504. 03260 Need care in interpreting simplified models: Many decay modes in SUSY models Reality may not be simple

Exploring Light Stops @ Run 2 20121 p. MSSM 10 520/fb Reach of chargino + b searches Reach of LSP + top searches De Vries, JE et al: ar. Xiv: 1504. 03260 Part of region of light “natural” stop weighing ~ 400 Ge. V can be covered

Fits to Supersymmetric Models 20121 520/fb Gluino mass Reach of LHC at High luminosity De Vries, JE et al: ar. Xiv: 1504. 03260 Favoured values of gluino mass also significantly above pre-LHC, > 1. 2 Te. V

Fits to Supersymmetric Models 20121 Stop mass 520/fb Compressed stop region De Vries, JE et al: ar. Xiv: 1504. 03260 Remaining possibility of a light “natural” stop weighing ~ 400 Ge. V

Direct Dark Matter Searches • Compilation of present and future sensitivities Neutrino “floor”

Direct Dark Matter Search: p. MSSM 10 20121 Spin-independent dark matter scattering 520/fb Bagnaschi, JE et al: ar. Xiv: 1508. 01173 Estimated reach with LUX-Zepelin May also be below Neutrino ‘floor’ Direct scattering cross-section may be very close to LUX upper limit, accessible to LZ experiment

Prospects for SUSY Searches • Different models, various dark matter mechanisms • No guarantees, but good prospects Bagnaschi, JE et al: ar. Xiv: 1508. 01173

Beware of Over-Simplification • Does simplified model have right dark matter density? • Many different mechanisms for bringing density into cosmological range • Not only conventional annihilation & freeze-out • Consider extending simplified model approach to include such possibilities • Coannihilation with some other, almostdegenerate sparticle – stau, stop, wino, … • Rapid annihilation via direct-channel resonances

_ Interference Effects in Scalar t t _ • Interference with gg t t background can give dip Top loop alone vs. + vector-like quarks • Brazil bands from ATLAS 8 Te. V data Djouadi, JE & Quevillon: ar. Xiv: 1605. 00542

Zen Events JE. Hagelin, Nanopoulos & Olive: 1983 ‘‘You can make the sound of two hands clapping. Now what is the sound of one hand? ”

Bullet Points • Combination of searches • t-channel models, 2 HDMs • Connection with other signatures – e. g. , coannihilation, long-lived, searches for other unexplored/challenging final states • Searching for the mediator – e. g. , dijets, scalar/pseudoscalar, … • What if 750 Ge. V or other resonance? – e. g. , New dim-5 couplings, unknown width, … • Keep track of different scales • Phil’s point about couplings and width • Interface with hardware upgrade