Welcome to Fermilab Double Higgs Production at Colliders Workshop

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Welcome to Fermilab Double Higgs Production at Colliders Workshop Marcela Carena, Theoretical Physics Department September 4, 2018 The SM is Omnipresent • The last seven particle colliders (three B factories, LEP, SLC,Tevatron, and LHC) have so far seen no conclusive evidence of Beyond the SM phenomena in the laboratory • This is at least somewhat surprising for LHC, since strong arguments based on naturalness imply that the Higgs boson should be accompanied by BSM physics at a similar scale, ~ TeV • The only BSM physics observed so far in the lab is neutrino mass (from neutrino flavor change) • Some deviations in the flavor sector are intriguing, but not conclusive Question: Answer: • Higgs BSM Physics motivation for the next • Neutrinos and generation of Energy and Intensity • Dark matter Flavor Frontier machines? 2 9/4/18 Marcela | Welcome to Fermilab Higgs Its existence implies the Higgs mechanism, a very sophisticated property of the quantum vacuum It implies a phase transition in the early universe of unknown origin Obviously, it should be a top priority of HEP to detect, measure, and understand the detailed physics tied to the Higgs • Detect and measure with precision the various decay modes of the Higgs boson, including “invisible” decays. • Detect the Higgs self-coupling; constrain directly the Higgs potential • Detect evidence of Higgs compositeness ? • Find heavier (or lighter?) additional Higgs bosons LHC and HL-LHC can tell us a lot, but will not be definitive for any of these challenges 3 9/4/18 Marcela | Welcome to Fermilab Many Colliders in the Horizon The Road Ahead CLIC ILC μ-collider HE-LHC LHC HL-LHC FCC (ee, hh, eh) CEPC SppC 2015 2025 2035 2045 2055 Year 8 Markus Klute, 2016 4 9/4/18 Marcela | Welcome to Fermilab Di-Higgs Bauer, MC, Carmona (1801.00363) MC, Liu, Riembau (1801.00794) Di-Higgs production in extended Higgs sectors • Correlation between enhanced Higgs-fermion couplings and di-Higgs production in 2HDM w/ flavour symmetry • Visible in resonant & non-resonant, dedicated LHC searches • Interference effects in SM + Singlet extends sensitivity of di-higgs in first order phase transition region, at HL-LHC 1801.00363 1801.00794 12.5 h + H NLO h + H GeV] / 10.0 h [pb H 3 − 7.5 10 ⇥ 5.0 hh /dm 2.5 Based on σ d pp à HHà bbγγ, 0.0 [1502.00539] 300 400 500 600 700 mhh [GeV] 5 9/4/18 Marcela | Welcome to Fermilab This Workshop: Discuss recent results, analysis techniques and theoretical . calculations of HH production. Local organization committee: Luca Cadamuro (Florida U) Marcela Carena (U Chicago/Fermilab) Jacobo Konigsberg (Florida U) Zhen Liu (Fermilab/U Maryland-chair) Caterina Vernieri (Fermilab-chair) 6 9/4/18 Marcela | Welcome to Fermilab This Workshop: Discuss recent results, analysis techniques and theoretical . calculations of HH production. Local organization committee: Luca Cadamuro (Florida U) Marcela Carena (U Chicago/Fermilab) Jacobo Konigsberg (Florida U) Zhen Liu (Fermilab/U Maryland-chair) Caterina Vernieri (Fermilab-chair) Thanks for being at Fermilab 7 9/4/18 Marcela | Welcome to Fermilab.

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EPPSU2020 European Particle Physics Strategy Update 2020
EPPSU2020 European Particle Physics Strategy Update 2020 Halina Abramowicz Tel Aviv University • European Particle Physics Strategy (EPPS) – why? • Recommendations and outcome of EPPSU 2013 • Preparations for the EPPSU 2020 4-Dec-18 DESY Colloquium 1 EPPSU2020 Why European Strategy for Particle Physics? • Relation between ESFRI and CERN had to be clarified within the European Commission v ESFRI, the European Strategy Forum on Research Infrastructures (initiated in 2002, mandated in 2004), is a strategic instrument to develop the scientific integration of Europe and to strengthen its international outreach. v CERN’s convention mandates coordination of infrastructure of particle physics for Member States • First ESFRI roadmap published in 2006, with 35 projects, the Roadmap was updated in 2008 bringing the number of RIs of pan-European relevance to 44. Later updates 2010, 2016, 2018 (49+6 new) • First European Particle Physics Strategy (EPPS) called by CERN Council in 2005 and endorsed in 2006, latest update in 2013… next in 2020. 4-Dec-18 DESY Colloquium 2 EPPSU2020 Why European Strategy for Particle Physics? Major Research Infrastructures in Particle and Nuclear Physics ESFRI Projects and Landmarks in Particle and Nuclear Physics 4-Dec-18 DESY Colloquium 3 EPPSU2020 Strategy Group Remit for the 2006 EPPS The Strategy Group shall aim: • to enhance the visibility of existing European particle physics programs; • to foster increased collaboration among Europe's particle physics laboratories and institutes; • to promote a coordinated European participation in world-wide projects; • to reiterate the CERN Council's 2004 position on the European strategy for the International Linear Collider; • to encourage knowledge transfer to other disciplines, industries, and society; • to outline priorities, at least implicitly; • to consider time scales; • to follow a thematic or project approach, whichever is more appropriate.
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