Notes from SUSY2018 Conference Romain Madar 06/2018 Romain Madar - PowerPoint PPT Presentation

Notes from SUSY2018 Conference Romain Madar 06/2018 Romain Madar Notes from SUSY2018 Conference 06/2018 1 / 56

Overview 1 Collider physics 2 Theoretical ideas 3 Cosmology 4 Conclusions Romain Madar Notes from SUSY2018 Conference 06/2018 2 / 56

Collider physics Collider physics Romain Madar Notes from SUSY2018 Conference 06/2018 3 / 56

Collider physics Precision calculations and generators I Plenary session - presentation Main ingredients: NLO fully automatized “NLO revolution”, but NNLO is possible only for ( 2 ) → ( 2 ) process importance of mixed-coupling perturbative developpement, especially in tails of distributions (not trivial interplay of higher-order QCD and EW corrections) . This starts to be relevant for EFT parametrization of new physics (mixing between α s and 1 / Λ ). Romain Madar Notes from SUSY2018 Conference 06/2018 4 / 56

Collider physics Precision calculations and generators II Figure 1: Impact of full correction (EW and QCD) on t ¯ tZ and W + jets production Romain Madar Notes from SUSY2018 Conference 06/2018 5 / 56

Collider physics Precision calculations and generators III Figure 2: Impact of full correction (EW mixed with QCD) on t ¯ t production Romain Madar Notes from SUSY2018 Conference 06/2018 6 / 56

Collider physics Precision calculations and generators IV Additional details fixed order : analytically resummed with Matrix Element (ME) for a given number of partons matched : generate the parton either ME with or parton showering (PS) depending on pT and/or ∆ R with a given number of parton LO only merged : the inclusion in a single simulation of several matched samples + 1 j , + 2 j , + 3 j , ... possible at NLO Take away message NLO merging is geting there, “only” technical details but no conceptual wall while NNLO is still not fully automatized (only done for particular cases but no universtal structure in amplitudes found as for the “NLO revolution”) Romain Madar Notes from SUSY2018 Conference 06/2018 7 / 56

Collider physics Precision measurements in the top quark sector I Plenary session - presentation Main ingredients: inclusive cross-section → constrain EFT TopFiter kinematics → contraint the structure of ggt (prod) and Wtb (decay) interactions general strategy: assume one is standard and probe deviation for the other spin correlation for top-gluon interaction (production) and relies on bare top quark decay since the spin information is not diluted in the hadronisation W helicity for top-W-botom interaction (decay) Romain Madar Notes from SUSY2018 Conference 06/2018 8 / 56

Collider physics Precision measurements in the top quark sector II Figure 3: Constraint on EFT coming from pp → t ¯ t cross-section. Romain Madar Notes from SUSY2018 Conference 06/2018 9 / 56

Collider physics Precision measurements in the top quark sector III Figure 4: Last ATLAS result on spin correlation with 3 . 2 σ excess ATLAS-CONF-2018-027 Romain Madar Notes from SUSY2018 Conference 06/2018 10 / 56

Collider physics SUSY searches at the LHC I Plenary session - presentation 1, presentation 2 Main ingredients: chargino and neutralino are mixing of bino, winos, higgsino electroweak cross-section are very small and only started at Run 2 simplified model ( ie. 100% BR) are assumed in 2D limit plots, but this doesn’t directly rely to nMSSM exclusion slowly reaching the TeV scale in EW production interesting idea: CMS has low pT trigger with 2 kHz rate but don’t record all the information of the event, allowing to keep the statistics at low pT. Romain Madar Notes from SUSY2018 Conference 06/2018 11 / 56

Collider physics SUSY searches at the LHC II Figure 5: Production cross-section of several SM processes, MSSM strong production and MSSM electro-weak production. Romain Madar Notes from SUSY2018 Conference 06/2018 12 / 56

Collider physics Jet rate and jet/gluon tagging I Models, Phenomenology and Experimental Results 1 - presentation Main ingredients: good understanding of quark-jet and gluon-jet emission fraction using functional generation computation of gluon/quark jets probability for uu → uu , gg → gg and gu → gu Build a BDT to discriminate quark from gluon-jets on Z /γ + jets and di-jets events Romain Madar Notes from SUSY2018 Conference 06/2018 13 / 56

Collider physics Jet rate and jet/gluon tagging II Figure 6: Theoretical formulation of quark/gluon jet rates Romain Madar Notes from SUSY2018 Conference 06/2018 14 / 56

Collider physics Jet rate and jet/gluon tagging III Figure 7: Prediction of averaged number of quark jets for different elementary processes Romain Madar Notes from SUSY2018 Conference 06/2018 15 / 56

Collider physics Jet rate and jet/gluon tagging IV Figure 8: Discriminant q/g jets and template fit for the fourth leading jets Romain Madar Notes from SUSY2018 Conference 06/2018 16 / 56

Collider physics Overview of flavour anomalies I plenary session - presentation Main ingredients: two main anomalies summarized here: B → D ( ∗ ) ℓν probing lepton universality with τ and e /µ at the tree level through the 1 ratio between ℓ = τ and ℓ = e /µ BR ( R D ). B → K ∗ ℓ + ℓ − probing lepton universality between e and µ at the 1-loop FCNC level, 2 using angular distribution ( e.g. P 5 ) and ratio of BR in µµ and ee ( R K ). Romain Madar Notes from SUSY2018 Conference 06/2018 17 / 56

Collider physics Overview of flavour anomalies II Figure 9: Anomaly observed in B → D ( ∗ ) ℓν Romain Madar Notes from SUSY2018 Conference 06/2018 18 / 56

Collider physics Overview of flavour anomalies III Figure 10: Angular anomaly observed in B → K ∗ ℓ + ℓ − Romain Madar Notes from SUSY2018 Conference 06/2018 19 / 56

Collider physics Overview of flavour anomalies IV Figure 11: Anomaly observed in B → K ∗ ℓ + ℓ − Atempt to explain it using two main approaches: standard model effective field theory with dimension 9 and 10 operators, and direct model building approach based on coloured neutral boson coupled to τ − µ or lepto-quarks. Romain Madar Notes from SUSY2018 Conference 06/2018 20 / 56

Collider physics Overview of flavour anomalies V Suggestion of other observables to measure in order to beter identify which scenario is actually realized ( e.g. pp → ττ + X and B → K ∗ ττ ). Romain Madar Notes from SUSY2018 Conference 06/2018 21 / 56

Theoretical ideas Theoretical ideas Romain Madar Notes from SUSY2018 Conference 06/2018 22 / 56

Theoretical ideas 3rd generation prediction with SUSY+VLQ Models, Phenomenology and Experimental Results - presentation predicts y t , y b , y τ & 3 gauge couplings α i using IR fixed points fixed points is way to naturally stabilize quantum corrections for the UV region, but IR gives a natural values (Asymptotic Safety Beyond the Standard Model, LIO2016) start at the GUT scale and run at EW scale, depending on the particle content to explain 6 constants! drawbacks: doesn’t deal with 1st and 2nd generation (too light) many assumption on scales/coupling equality Romain Madar Notes from SUSY2018 Conference 06/2018 23 / 56

Theoretical ideas Going beyond the SM I Plenary session - presentation Main ingredients: EFT of the SM with interesting operator counting depending on the dimension, and it can be prety large (see figure later)! c d i O d Λ d − n = L d ≤ 4 + L 5 L d Λ + L 6 � � i L EFT = Λ d − n = Λ 2 + ... d , i d Dimension 5 are called Weinberg operators and dimension 6 was studied extensively. They are fairly understandable (tri-gauge couplings, correction to the Higgs potential, correction to the Higgs-gluon couplings) Pros & cons of EFT General and relatively agnostic parametrization of new physics No new (explicit) degree of freedom Romain Madar Notes from SUSY2018 Conference 06/2018 24 / 56

Theoretical ideas Going beyond the SM II Figure 12: Number of operators as a function of operator dimension (3 and 4 generations) Romain Madar Notes from SUSY2018 Conference 06/2018 25 / 56

Theoretical ideas Going beyond the SM III Figure 13: Constraints on EFT operators with and without LHC data (warsaw basis Romain Madar Notes from SUSY2018 Conference 06/2018 26 / 56

Theoretical ideas Going beyond the SM IV One new idea to face hierarchy issue is to assume that electro-weak scale comes from inflation scenario by adding one field which quickly relax and makes the Higgs potential with a minima. Romain Madar Notes from SUSY2018 Conference 06/2018 27 / 56

Theoretical ideas Going beyond the SM V Figure 14: Higgs vev emerging from a kind of inflation Romain Madar Notes from SUSY2018 Conference 06/2018 28 / 56

Theoretical ideas Constraining low energy EFT SM with DUNE I BSM aspects of flavour physics - presentation Main ingredients effective theory at low energy (weak EFTSM) integrating out heavy fields prediction of neutrino-quark and neutrino-lepton interaction expected precision from DUNE for three types of process is translated in term of wEFTSM coefficients: neutrino dffusion over coulomb field of nuclei ν → νℓ + ℓ − 1 neutrino-electron diffusion ν e → ν e 2 neutrino-nucleon diffusion ν N → ν N 3 Romain Madar Notes from SUSY2018 Conference 06/2018 29 / 56