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UCL SUSY and other BSM physics with CMS G. Bruno on behalf of the CMS Collaboration Center for Cosmology, Phenomenology and Particle Physics (CP3) Université.

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Presentation on theme: "UCL SUSY and other BSM physics with CMS G. Bruno on behalf of the CMS Collaboration Center for Cosmology, Phenomenology and Particle Physics (CP3) Université."— Presentation transcript:

1 UCL SUSY and other BSM physics with CMS G. Bruno on behalf of the CMS Collaboration Center for Cosmology, Phenomenology and Particle Physics (CP3) Université catholique de Louvain (UCL), Louvain-la-Neuve, Belgium LHC Days in Split Conference 30/9/2014

2 UCL The Standard Model puzzles Higgs boson discovery has completed the SM Key unanswered questions: o Dark matter o Matter-antimatter asymmetry o Neutrino masses o Gravity and “dark energy” o Unification of forces o Deeper origin of electroweak symmetry breaking o Deeper origin of fermion mass hierarchies, flavor mixing, and CP violation BSM Physics that would address these questions is in many cases expected at the TeV scale Split2014 – BSM in CMS2

3 UCL BSM physics ideas Split2014 – BSM in CMS3

4 UCL How to search for BSM physics at the LHC Scalar sector o Precise measurements of Higgs couplings and properties o Search for an extended scalar sector Precise measurement of SM observables o Few, yet notable, competitive examples Final states with top quarks o Strong and ew couplings o Rare decays o Top squark, vector-like top partners, tt resonances Other direct searches for new physics o Inclusive squarks and gluino (and neutralino) searches o Compressed SUSY spectra o R-parity violating susy searches o New vector bosons o mono X searches (heavy, strongly interacting states are out of reach) o Long-lived particles Split2014 – BSM in CMS4 Talks by: J.-P. Sauvan A. Nikitenko F. Pandolfi Talks by C. Grab and E. Gallo Talk by J. Cuevas Maestro Talk by R. Bartek Talk by M. Kazana

5 UCL Supersymmetry Split2014 – BSM in CMS5

6 UCL SUSY searches High cross section – gluinos,1 st and 2 nd generation squarks o Multijets + MET w/wo b- jets, leptons, photons Split2014 – BSM in CMS6 Medium cross section – stop and sbottom o Multi-jets + MET + b- tags w/w.o. leptons o Dedicated searches Low cross section – Charginos, neutralinos, sleptons: o 0-4 leptons + METw/w.o. b-tags, jets, W’s, Z’s, h’s Highly motivated theoretical framework o Lays the bases for unification of forces o Provides a dark matter candidate o Can stabilize the Higgs mass

7 UCL All-hadronic inclusive search Gluinos,1 st,2 nd gen. squarks 36 signal regions in bins of o Jet multiplicity (≥3) o HT (≥500 GeV) o HT miss (≥200 GeV) Limits in Simplified Model Space (SMS) Split2014 – BSM in CMS

8 UCL The search for (natural) stops Split2014 – BSM in CMS8

9 UCL Stop search for moderate mass differences Split2014 – BSM in CMS9

10 UCL Stop search: filling the gaps Monojet dedicated analysis (SUS ) o ISR can induce high E T miss and relatively soft charm jets o E t miss >250 GeV; o p T (j 1 )>110 GeV Split2014 – BSM in CMS10

11 UCL Ewkino searches Split2014 – BSM in CMS11

12 UCL M(l + l - ) kinematic edge search Split2014 – BSM in CMS12 OS-SFOS-OF Cut&Count SUS

13 UCL DARK MATTER Split2014 – BSM in CMS13

14 UCL Dark Matter (DM) searches DM-nucleon scattering (LUX, CDMS, XENON, …) DM annihilation or decay (Fermi, PAMELA, AMS, IceCube, …) DM production at colliders o Particularly competitive at low DM masses o DM produced in cascade decays from heavier particles: Supersymmetry, Higgs portal o Direct DM production Detectable if accompanied by additional objects (e.g. ISR) Interpretation in terms of Effective Field Theories Split2014 – BSM in CMS14

15 UCL Mono-X searches Split2014 – BSM in CMS15

16 UCL Limits on DM Split2014 – BSM in CMS16 Invisible Higgs: scalar, fermion and vector DM

17 UCL Mono-W (DM-DM-W production) Split2014 – BSM in CMS17

18 UCL EXTRA-DIMENSIONS, COMPOSITENESS and new BOSONS Split2014 – BSM in CMS18

19 UCL Theoretical context Split2014 – BSM in CMS19

20 UCL Dilepton searches Narrow resonances (EXO ) o Shape analysis in the full unbinned di-μ and di-e inv. mass spectra Enhancement in di-lepton event rates at high mass (EXO , EXO , EXO ) o Count events beyond mass threshold Split2014 – BSM in CMS20 EXO EXO

21 UCL Dilepton searches - limits Split2014 – BSM in CMS21

22 UCL FINAL STATES WITH TOP QUARKS Split2014 – BSM in CMS22

23 UCL ttbar invariant mass distribution Split2014 – BSM in CMS

24 UCL Rare top decays Split2014 – BSM in CMS24

25 UCL NEUTRINOS Split2014 – BSM in CMS25

26 UCL Search for RH heavy neutrino and W Search guided by Left-right symmetric SM extensions o Predicts heavy RH W/Z and Majorana neutrinos, explaining neutrino masses through see-saw o Signature with SF leptons: Shape analysis in the lljj invariant mass spectrum o No distinction between OS and SS leptons First limits on W R beyond the th. lower limit M WR >2.5 TeV (from K L -K S mass diff.) o 2.8 σ local excess in electron channel (only 1 SS pair out of 14 events and no deviation in muon channel) Split2014 – BSM in CMS

27 UCL Conclusions Huge spectrum of BSM physics searches performed by CMS Overview and personal selection, with some physics guidance, presented in this talk Ground prepared for the RUNII data analysis Split2014 – BSM in CMS27

28 UCL BACK-UP Split2014 – BSM in CMS28

29 UCL Split2014 – BSM in CMS29

30 UCL Split2014 – BSM in CMS30

31 UCL Split2014 – BSM in CMS31

32 UCL Conclusions Split2014 – BSM in CMS32


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