The Higgs Boson and Beyond at the Large Hadron Collider

Transcription

1 The Higgs Boson and Beyond at the Large Hadron Collider Mike Hance (LBNL) July 11, 2013

2 Particle Physics at the LHC M. Hance 2 / 46 Particle Physics at the LHC- July 11, 2013 Today s Discussion: A few words about me Some basic particle physics Fundamental particles and their interactions Why the Higgs is important What questions we re trying to answer at particle colliders Short break here. The tools The Large Hadron Collider The ATLAS detector What we ve learned in the past 5 years There is a Higgs!...and other interesting things. Conclusion

3 About Me

4 About me M. Hance 4 / 46 Particle Physics at the LHC- July 11, 2013 I went to high school in Connecticut, and then undergrad at Boston University. Majored in Physics and Math Research with the Intermediate Energy Group (physics) Worked on scintillators and electronics for a muon-lifetime experiment Great introduction to real research Travel to Switzerland for a few weeks over the summer Most useful things I did in college: 1 Took two semesters of intro CS (programming) 2 Found mentors early 3 Found a research project that I could continue for several semesters 4 Had fun!

5 About me Graduate School at UPenn Two years of courses Research during the summers (and part-time in the second year) Full-time research after second year This varies among universities and research topics I moved to CERN for three years after classes Will mention some of the things I worked on later Back to the US to finish my dissertation Post-doc at LBL Very similar to grad school, but with a little more autonomy and responsibility Typically lasts for 2-5 years in HEP M. Hance 5 / 46 Particle Physics at the LHC- July 11, 2013

6 Particle Physics 1 (In 15 Minutes)

7 Some Useful Terms M. Hance 7 / 46 Particle Physics at the LHC- July 11, 2013 Some terms that will be useful today: Cross section: rate at which a given subatomic interaction occurs, abbrev. σ barn: a measure of cross section, abbrev. b 1b = 28 m 2, 1 pb = 34 m 2 Large cross section something that happens often (nb-pb) Small cross section rare process (fb) Luminosity: the rate at which particles collide in an accelerator Expressed in units of 1/barns, e.g. 00 pb 1 = 1 fb 1 Integrated luminosity: a measure of the amount of collisions recorded, abbrev. Ldt electron Volt: a unit of energy, abbrev. ev E = mc 2, so is also a unit of mass (GeV/c 2 ) or momentum (GeV/c) 1 proton has mass of roughly 1 GeV/c 2 Planck Mass: what combination of fundamental constants (, c, G) gives units of mass? m P = c G = kg = GeV/c 2

8 Atoms are... big 1 angstrom = 0 pm Usually a stable system Nucleons bound together Mass n kg = n GeV/c 2 Foundations of chemistry M. Hance 8 / 46 Particle Physics at the LHC- July 11, 2013

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11 M. Hance 11 / 46 Particle Physics at the LHC- July 11, 2013 Discovering the Standard Model We ve found all the pieces of the Standard Model... except perhaps one: Gluon observed in late 70 s W and Z bosons first observed in 1980 s All flavors of quarks and leptons have been found (last was t-quark in 1995) No signs of the Higgs until recently

12 Discovering the Standard Model M. Hance 12 / 46 Particle Physics at the LHC- July 11, 2013 [pb] σ total pb 35 pb ATLAS Preliminary LHC pp Theory s = 7 TeV Data (L = fb ) fb LHC pp s = 8 TeV Theory Data (L = fb ) fb 5.8 fb 1.0 fb 4.6 fb 13 fb 4.6 fb 2.1 fb 4.6 fb 20 fb 1 W Z tt t WW WZ Wt ZZ

13 Finding Heavy Particles M. Hance 13 / 46 Particle Physics at the LHC- July 11, 2013 One way to find heavy particles is to look for mass resonances. E = mc 2 is only really true for particles at rest E 2 = m 2 0 c4 + p 2 c 2 in special relativity Z 0 µ + µ m Z = E 2 Z ( p Z c) 2 /c 2 Let c = 1 m Z = (Eµ + + E µ ) 2 p µ + + p µ 2

14 Finding Heavy Particles One way to find heavy particles is to look for mass resonances. E = mc 2 is only really true for particles at rest E 2 = m 2 0 c4 + p 2 c 2 in special relativity Z 0 µ + µ m Z = E 2 Z ( p Z c) 2 /c 2 Let c = 1 m Z = (Eµ + + E µ ) 2 p µ + + p µ 2 So, by measuring muon properties, we can reconstruct the Z-boson mass and momentum Conservation of momentum Basis for many, many analyses m µµ [GeV] M. Hance 13 / 46 Particle Physics at the LHC- July 11, 2013 Events / 1 GeV 1600 ATLAS Data 20 ( Z µµ QCD s = 7 TeV) L dt = 33 pb

15 Jets M. Hance 14 / 46 Particle Physics at the LHC- July 11, 2013 Quarks and gluons don t land in the detector intact they fragment almost immediately Strong force prevents us from seeing bare partons Many things produce jets: Can be partons bouncing off of each other 70% of W- and Z-bosons decay into jets Easy to find jets, hard to measure their energies.

16 How do we look for the Higgs? M. Hance 15 / 46 Particle Physics at the LHC- July 11, 2013 Finding the Higgs is tricky! Trade-off between most common decays (lots of background) and rare decays (smaller backgrounds)

17 How do we look for the Higgs? M. Hance 16 / 46 Particle Physics at the LHC- July 11, 2013 χ LEP 95% CL LHC 95% CL Tevatron 95% CL G fitter SM May 12 3σ Theory uncertainty 2σ 1σ [GeV] M H

18 What can t the Standard Model do? M. Hance 17 / 46 Particle Physics at the LHC- July 11, 2013 Assuming we find the Higgs, the Standard Model will be complete. Then what? Why is gravity so weak at short distances? How does gravity behave at the quantum level? Black holes Big bang What is dark energy? What is dark matter? Why is the Higgs mass so light compared to the Planck mass? Need new theories to explain what happened at the Big Bang to produce the universe we see today. Supersymmetry (SUSY)? (Large) Extra Dimensions? Something completely unexpected?

19 Supersymmetry M. Hance 18 / 46 Particle Physics at the LHC- July 11, 2013

20 Extra Dimensions M. Hance 19 / 46 Particle Physics at the LHC- July 11, 2013 New dimensions could be very small, but still big enough to change how particles behave Look for extra dimensions via missing energy New particles carry energy into bulk Very distinct events!

21 The Tools

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24 The LHC Magnets The LHC machine is a 17-mile ring of magnets: Uses superconducting NbTi wires to create dipole fields Superconductivity needs cold temperatures 0 tons of liquid helium at 1.9 Kelvin Fields of up to 8.3 T M. Hance 23 / 46 Particle Physics at the LHC- July 11, 2013

25 The LHC in Numbers M. Hance 24 / 46 Particle Physics at the LHC- July 11, 2013 For the 2012 run, some stats on the accelerator: 8 TeV collisions Bunches of protons colliding at 40 MHz 20 fb 1 of data per experiment O(0) petabytes of data stored After the current shutdown: 14 TeV collisions 3000 fb 1 of data per experiment by 2030 Four main experiments: ATLAS - multipurpose experiment, 3000 collaborators CMS - multipurpose, 3000 collaborators ALICE - heavy ion physics, 1200 collaborators LHCb - bottom-quark physics, 620 collaborators

26 A Toroidal LHC ApparatuS

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30 How do we do science at the LHC? M. Hance 29 / 46 Particle Physics at the LHC- July 11, 2013 Two general types of investigations: Measurements of known quantities e.g. mass of top quark, Z-boson cross section, etc. Limit uncertainty on measurement as much as possible

31 How do we do science at the LHC? M. Hance 29 / 46 Particle Physics at the LHC- July 11, 2013 Two general types of investigations: Measurements of known quantities e.g. mass of top quark, Z-boson cross section, etc. Limit uncertainty on measurement as much as possible Searches for unobserved phenomena Looking for SUSY or extra dimensions Can focus on a specific model (SUSY) or signature (events with two muons) Two possible outcomes: We discover new physics! We only see what the Standard Model predicts, so we can infer the absence of new physics Both are critical components of the overall physics program at the LHC!

32 M. Hance 30 / 46 Particle Physics at the LHC- July 11, 2013 Simulation For either measurements or searches, rely a lot on simulation. Rather than building multiple LHC s and detectors in the real world, use computers to model them We can then inject fake events into our simulated detector to see how it responds

33 Computing M. Hance 31 / 46 Particle Physics at the LHC- July 11, 2013 It takes a lot of computers to handle 0 PB! Computing farms all over the world Lots of different technologies at work: Most computers run Linux (Windows and IOS are for phones) Data analysis: programming languages like C++ and python Information management: making data easily available to many people, security issues, data privacy Low-level hardare: getting computers to talk with custom detector components

34 So, what have we found?

35 (Re)-discovering the Standard Model M. Hance 33 / 46 Particle Physics at the LHC- July 11, 2013 [pb] σ total pb 35 pb ATLAS Preliminary LHC pp Theory s = 7 TeV Data (L = fb ) fb LHC pp s = 8 TeV Theory Data (L = fb ) fb 5.8 fb 1.0 fb 4.6 fb 13 fb 4.6 fb 2.1 fb 4.6 fb 20 fb 1 W Z tt t WW WZ Wt ZZ

36 What about the Higgs? M. Hance 34 / 46 Particle Physics at the LHC- July 11, 2013 Look for Higgs in all possible decays Roughly 45 Higgs bosons produced in each pb 1 of data Can t afford to waste any of them! Most popular decay is bb difficult! b s show up as jets, there are a lot of those, and it s hard to measure their energies Then WW, ττ, and ZZ also hard Most of the time, these particles also produce jets! γγ is last, but promising

37 M. Hance 35 / 46 Particle Physics at the LHC- July 11, 2013 What about the Higgs? t Events / 2 GeV H W γ γ Higgs decay to diphotons is rare, but powerful BR 3 But ATLAS can measure photons very accurately Use photons to figure out invariant mass Simulation, 1999 Signal-background, events / 2 GeV m γγ (GeV) m γγ (GeV)

38 What we knew after 2011 M. Hance 36 / 46 Particle Physics at the LHC- July 11, % CL Limit on σ/σ SM ATLAS 2011 Obs. Exp. ±1 σ ±2 σ 1 Ldt = fb s = 7 TeV 2011 Data CLs Limits [GeV] m H

39 What we saw in 2012 M. Hance 37 / 46 Particle Physics at the LHC- July 11, 2013 Events / 2 GeV Events - Fitted bkg s = 7 TeV, Ldt = 4.8 fb s = 8 TeV, Ldt = 20.7 fb Selected diphoton sample Data Sig+Bkg Fit (m =126.8 GeV) H Bkg (4th order polynomial) ATLAS Preliminary H γγ m γγ [GeV] It looks just like we expected! 0 Local p Observed p (category) 0 Expected p (category) 0 Observed p (inclusive) 0 Expected p (inclusive) 0 Data 2011, s = 7 TeV Data 2012, Still not total confirmation yet, still need to look at other properties ATLAS Preliminary H γγ Ldt = 4.8 fb s = 8 TeV Ldt = 20.7 fb A lot of work left to be done on the Higgs, but this is a major scientific achievement! [GeV] m H 1 2σ 3σ 4σ 5σ 6σ 7σ

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42 And SUSY? M. Hance 40 / 46 Particle Physics at the LHC- July 11, 2013 p g q q ν/l l/ν χ ± 1 l/ ν χ 0 1 SUSY often produces very spectacular events Lots of energetic particles Missing energy from neutrinos and χ 0 1 p g q χ 0 2 q l/ ν χ 0 1 l/ν l/ν

43 And SUSY? M. Hance 40 / 46 Particle Physics at the LHC- July 11, 2013 p p g g q q ν/l l/ν q χ ± 1 χ 0 2 q No signs of SUSY yet l/ ν l/ ν Ruled out the easiest-to-see models χ 0 1 χ 0 1 l/ν l/ν Plenty of ways it could still be hiding! SUSY often produces very spectacular events Events / 0 GeV data / exp Lots of energetic particles Missing energy from neutrinos and χ Data ATLAS Preliminary Ldt = 20.1 fb, s = 8 TeV 0-lepton baseline selection 4 jets > 50 GeV, 3 b-jets > 50 GeV SM total Reducible bkg (MM) Irreducible bkg (MC) ~ 0 Gbb ( g, χ ) (1300, 0) GeV j m eff [GeV]

44 SUSY is Hiding... M. Hance 41 / 46 Particle Physics at the LHC- July 11, 2013 [GeV] m 1/2 MSUGRA/CMSSM: tan( β) = 30, A = -2m 0, µ > 0 Lepton & Photon SUSY τ 95% CL limits. σtheory not included. LSP ATLAS Preliminary L dt = fb, s = 8 TeV Expected Observed Expected Observed Expected Observed Expected Observed Expected Observed Expected Observed 0-lepton, 2-6 jets ATLAS-CONF lepton, 70 jets ATLAS-CONF lepton, 3 b-jets ATLAS-CONF lepton + jets + MET ATLAS-CONF taus + jets + MET ATLAS-CONF SS-leptons, 0-3 b-jets ATLAS-CONF ~ g (1400 GeV) ~ g (00 GeV) 300 ~ q (1600 GeV) ~ q (2000 GeV) m 0 [GeV]

45 Extra Dimensions? M. Hance 42 / 46 Particle Physics at the LHC- July 11, 2013 A few ways to look for extra dimensions: One way: look for events with two energetic photons Like the Higgs, but much higher energy Events/bin 3 2 ATLAS L dt = 4.9 fb s = 7 TeV Control region 2011 data Total Background Reducible Background syst stat (total) syst stat (reducible) RS, k/ M Pl = 0.1, m G = 1.5 TeV ADD, GRW, M S = 2.5 TeV Significance m γγ [GeV]

46 Dark Matter M. Hance 43 / 46 Particle Physics at the LHC- July 11, 2013 Two ways to look for dark matter at the LHC: Look for SUSY Look for generic dark matter

47 Dark Matter Two ways to look for dark matter at the LHC: Look for SUSY Look for generic dark matter Events/GeV 2 1 ATLAS Ldt = 4.7 fb s= 7 TeV SR4 Data 2011 D5 M=0GeV M =680GeV * ADD δ=2 M D =3.5TeV Sum of backgrounds Z( νν)+jets W( lν)+jets Z( ll)+jets tt + single top Di-bosons Events / GeV 2 1 ATLAS L dt = 4.6 fb Data 2011 ( s =7 TeV) Z( νν)+γ W/Z+γ W/Z+jet top, γ+jet, multi-jet, diboson Total background ADD NLO, M =1.0 TeV, n=2 D WIMP, D5, m χ = GeV, M =400 GeV * miss E Second leading jet p [GeV] T [GeV] T M. Hance 43 / 46 Particle Physics at the LHC- July 11,

48 Future Plans

49 Future Plans χ χ Currently in a 2-year shutdown Fix magnets for high energy Fix detector Add new subdetectors Upgrade/fix software Restart in 2015 at 13 TeV What we learn at 13 TeV will influence what we do next Will there be anything new? Will we need to build a new (bigger) accelerator? Mass [GeV] χ ATLAS Preliminary (simulation) s=14 TeV 7e fb, 95% exclusion limit 1e-02 7e fb, 5σ discovery reach 1e-02 1e-02 7e fb, 95% exclusion limit 2e-02 1e-02 1e-02 7e fb, 5σ discovery reach 3e-02 2e-02 1e-02 1e-02 7e-03 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 2e-01 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 4e-01 2e-01 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 7e-01 4e-01 2e-01 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e > WZ = 0% cross section (pb), χ + g(haa)/g(haa) SM LHC/ILC1/ILC/ILCTeV e+00 7e-01 4e-01 2e-01 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e-03 5e+00 2e+00 7e-01 4e-01 2e-01 1e-01 7e-02 4e-02 3e-02 2e-02 1e-02 1e-02 7e ± 0 χ and χ Mass [GeV] 1 2 pp -> χ W Z b g γ τ c t inv Figure 2: Comparison of the capabilities of LHC and ILC for model-independent measurements of Higgs boson couplings. The plot shows (from left to right in each set of error bars) 1 σ confidence intervals for LHC at 14 TeV with 300 fb 1, for ILC at 250 GeV and 250 fb 1 ( ILC1 ), for the full ILC program up to 500 GeV with 500 fb 1 ( ILC ), and for a program with 00 fb 1 for an upgraded ILC at 1 TeV ( ILCTeV ). More details of the presentation are given in the caption of Fig. 1. The marked horizontal band represents a 5% deviation M. Hance 45 / 46 from the Standard Model prediction for the Particle coupling. Physics at the LHC- July 11, 2013

50 Conclusions We re in a golden age of high energy physics! We see a Higgs consistent with the Standard Model... but we know nature must have more in store for us! What is it? So far, no signs of anything new at the LHC But there s a lot more data to be taken at higher energies Plenty of time to see new physics! M. Hance 46 / 46 Particle Physics at the LHC- July 11, 2013

51 Bonus Slides!

52 Parton Shower M. Hance 48 / 46 Particle Physics at the LHC- July 11, 2013

53 History M. Hance 49 / 46 Particle Physics at the LHC- July 11, 2013

54 Exotics M. Hance 50 / 46 Particle Physics at the LHC- July 11, 2013 ATLAS Exotics Searches* - 95% CL Lower Limits (Status: May 2013) LQ V' CI Extra dimensions New quarks Other Excit. ferm. Large ED (ADD) : monojet + E T,miss Large ED (ADD) : monophoton + E T,miss Large ED (ADD) : diphoton & dilepton, m γ γ / ll UED : diphoton + E T,miss 1 S /Z 2 ED : dilepton, m ll RS1 : dilepton, m ll RS1 : WW resonance, m T,lν lν Bulk RS : ZZ resonance, m lljj RS g tt (BR=0.925) : tt l+jets, m KK tt ADD BH (M TH /M D =3) : SS dimuon, N ch. part. ADD BH (M TH /M D =3) : leptons + jets, Σp T Quantum black hole : dijet, F χ (m jj ) qqqq contact interaction : χ(m ) jj qqll CI : ee & µµ, m ll uutt CI : SS dilepton + jets + E T,miss Z' (SSM) : m ee/µµ Z' (SSM) : m ττ Z' (leptophobic topcolor) : tt l+jets, m tt W' (SSM) : m T,e/µ W' ( tq, g =1) : m R tq W' R ( tb, LRSM) : m tb Scalar LQ pair (β=1) : kin. vars. in eejj, eνjj Scalar LQ pair (β=1) : kin. vars. in µµjj, µνjj Scalar LQ pair (β=1) : kin. vars. in ττjj, τνjj th 4 generation : t't' WbWb 4th generation : b'b' SS dilepton + jets + E T,miss Vector-like quark : TT Ht+X Vector-like quark : CC, m lν q Excited quarks : γ-jet resonance, m Excited quarks : dijet resonance, m γ jet jj Excited b quark : W-t resonance, m Wt Excited leptons : l-γ resonance, m lγ Techni-hadrons (LSTC) : dilepton, m ee/µµ Techni-hadrons (LSTC) : WZ resonance (lνll), m WZ Major. neutr. (LRSM, no mixing) : 2-lep + jets ± Heavy lepton N (type III seesaw) : Z-l resonance, m ±± ±± Zl HL (DY prod., BR(H ll)=1) : SS ee (µµ), m L ll Color octet scalar : dijet resonance, m jj Multi-charged particles (DY prod.) : highly ionizing tracks Magnetic monopoles (DY prod.) : highly ionizing tracks L=4.7 fb, 7 TeV [ ] L=4.6 fb, 7 TeV [ ] L=4.7 fb, 7 TeV [ ] L=4.8 fb, 7 TeV [ ] L=5.0 fb, 7 TeV [ ] L=20 fb, 8 TeV [ATLAS-CONF ] L=4.7 fb, 7 TeV [ ] L=7.2 fb, 8 TeV [ATLAS-CONF ] L=4.7 fb, 7 TeV [ ] L=1.3 fb, 7 TeV [ ] L=1.0 fb, 7 TeV [ ] L=4.7 fb, 7 TeV [ ] L=4.8 fb, 7 TeV [ ] L=5.0 fb, 7 TeV [ ] L=14.3 fb, 8 TeV [ATLAS-CONF ] L=20 fb, 8 TeV [ATLAS-CONF ] L=4.7 fb, 7 TeV [ ] L=14.3 fb, 8 TeV [ATLAS-CONF ] L=4.7 fb, 7 TeV [ ] L=4.7 fb, 7 TeV [ ] L=14.3 fb, 8 TeV [ATLAS-CONF ] L=1.0 fb, 7 TeV [ ] L=1.0 fb, 7 TeV [ ] L=4.7 fb, 7 TeV [ ] L=4.7 fb, 7 TeV [ ] L=14.3 fb, 8 TeV [ATLAS-CONF ] L=14.3 fb, 8 TeV [ATLAS-CONF ] L=4.6 fb, 7 TeV [ATLAS-CONF ] L=2.1 fb, 7 TeV [ ] L=13.0 fb, 8 TeV [ATLAS-CONF ] L=4.7 fb, 7 TeV [ ] L=13.0 fb, 8 TeV [ATLAS-CONF ] L=5.0 fb, 7 TeV [ ] L=13.0 fb, 8 TeV [ATLAS-CONF ] L=2.1 fb, 7 TeV [ ] L=5.8 fb, 8 TeV [ATLAS-CONF ] 245 GeV L=4.7 fb, 7 TeV [ ] L=4.8 fb, 7 TeV [ ] L=4.4 fb, 7 TeV [ ] L=2.0 fb, 7 TeV [ ] 1.93 TeV 4.37 TeV M D (δ=2) (δ=2) 4.18 TeV M S (HLZ δ=3, NLO) 1.40 TeV Compact. scale R 4.71 TeV M KK ~ R 2.47 TeV Graviton mass (k/m Pl = 0.1) 1.23 TeV Graviton mass (k/m Pl = 0.1) 850 GeV Graviton mass (k/m Pl = 1.0) Ldt 2.07 TeV g mass KK 1.25 TeV M D (δ=6) 1.5 TeV M D (δ=6) 4.11 TeV M D (δ=6) 7.6 TeV Λ 13.9 TeV Λ (constructive int.) 3.3 TeV Λ (C=1) 2.86 TeV Z' mass 1.4 TeV Z' mass 1.8 TeV Z' mass 2.55 TeV W' mass 430 GeV W' mass 1.84 TeV W' mass st 660 GeV 1 gen. LQ mass nd 685 GeV 2 gen. LQ mass rd 534 GeV 3 gen. LQ mass 656 GeV t' mass 720 GeV b' mass 790 GeV T mass (isospin doublet) 1.12 TeV VLQ mass (charge /3, coupling κ qq = ν/m Q ) 2.46 TeV q* mass 3.84 TeV q* mass 870 GeV b* mass (left-handed coupling) 2.2 TeV l* mass (Λ = m(l*)) 850 GeV ρ T /ω T mass (m(ρ /ω T ) - m(π T ) = M ) T W 920 GeV ρ mass (m(ρ ) = m(π T ) + m W, m(a ) = 1.1 m(ρ )) T T T T 1.5 TeV N mass (m(w ) = 2 TeV) R ± N mass ( V = 0.055, V µ = 0.063, V τ = 0) e ±± 409 GeV HL mass (limit at 398 GeV for µµ) 1.86 TeV Scalar resonance mass 490 GeV mass ( q = 4e) 862 GeV mass M D ATLAS Preliminary = ( 1-20) fb s = 7, 8 TeV *Only a selection of the available mass limits on new states or phenomena shown 1 2 Mass scale [TeV]

55 SUSY M. Hance 51 / 46 Particle Physics at the LHC- July 11, 2013 ATLAS SUSY Searches* - 95% CL Lower Limits Status: LP 2013 ATLAS Preliminary L dt = ( ) fb 1 s = 7, 8 TeV Model e, µ, τ, γ Jets E miss L dt[fb 1 ] T Mass limit Reference Inclusive Searches 3 rd gen. g med. MSUGRA/CMSSM 1 e, µ 3-6 jets Yes 20.3 g 1.2 TeV any m( q) ATLAS-CONF MSUGRA/CMSSM 0 70 jets Yes 20.3 g 1.1 TeV any m( q) ATLAS-CONF q q, q q χ jets Yes 20.3 q 740 GeV m( χ 0 1)=0 GeV ATLAS-CONF g g, g q q χ jets Yes 20.3 g 1.3 TeV m( χ 0 1)=0 GeV ATLAS-CONF g g, g qq χ ± 1 qqw ± χ0 1 1 e, µ 3-6 jets Yes 20.3 g 1.18 TeV m( χ 0 1)<200 GeV, m( χ ± )=0.5(m( χ 0 1)+m( g)) ATLAS-CONF g g qqqqll(ll) χ 0 1 χ0 1 2 e, µ (SS) 3 jets Yes 20.7 g 1.1 TeV m( χ 0 1)<650 GeV ATLAS-CONF GMSB ( l NLSP) 2 e, µ 2-4 jets Yes 4.7 g 1.24 TeV tanβ< GMSB ( l NLSP) 1-2 τ 0-2 jets Yes 20.7 g 1.4 TeV tanβ >18 ATLAS-CONF GGM (bino NLSP) 2 γ 0 Yes 4.8 g 1.07 TeV m( χ 0 1)>50 GeV GGM (wino NLSP) 1 e, µ + γ 0 Yes 4.8 g 619 GeV m( χ 0 1)>50 GeV ATLAS-CONF GGM (higgsino-bino NLSP) γ 1 b Yes 4.8 g 900 GeV m( χ 0 1)>220 GeV GGM (higgsino NLSP) 2 e, µ (Z) 0-3 jets Yes 5.8 g 690 GeV m( H)>200 GeV ATLAS-CONF Gravitino LSP 0 mono-jet Yes.5 F 1/2 scale 645 GeV m( g)> 4 ev ATLAS-CONF g b b χ b Yes 20.1 g 1.2 TeV m( χ 0 1)<600 GeV ATLAS-CONF g t t χ jets Yes 20.3 g 1.14 TeV m( χ 0 1) <200 GeV ATLAS-CONF g t t χ e, µ 3 b Yes 20.1 g 1.34 TeV m( χ 0 1)<400 GeV ATLAS-CONF g b t χ + 0 e, µ 1 3 b Yes 20.1 g 1.3 TeV m( χ 0 1)<300 GeV ATLAS-CONF rd gen. squarks direct production EW direct b1 b1, b1 b χ b Yes 20.1 b GeV m( χ 0 1)<0 GeV ATLAS-CONF b1 b1, b1 t χ± 1 2 e, µ (SS) 0-3 b Yes 20.7 b1 430 GeV m( χ ± 1 )=2 m( χ 0 1) ATLAS-CONF t1 t1(light), t1 b χ± e, µ 1-2 b Yes 4.7 t1 167 GeV m( χ 0 1)=55 GeV , t1 t1(light), t1 Wb χ0 1 2 e, µ 0-2 jets Yes 20.3 t1 220 GeV m( χ 0 1) =m( t1)-m(w )-50 GeV, m( t1)<<m( χ ± 1 ) ATLAS-CONF t1 t1(medium), t1 b χ± 1 2 e, µ 0-2 jets Yes 20.3 t GeV m( χ 0 1)=0 GeV, m( t1)-m( χ ± 1 )= GeV ATLAS-CONF t1 t1(medium), t1 b χ± b Yes 20.1 t GeV m( χ 0 1)<200 GeV, m( χ ± 1 )-m( χ 0 1)=5 GeV ATLAS-CONF t1 t1(heavy), t1 t χ0 1 1 e, µ 1 b Yes 20.7 t GeV m( χ 0 1)=0 GeV ATLAS-CONF t1 t1(heavy), t1 t χ b Yes 20.5 t GeV m( χ 0 1)=0 GeV ATLAS-CONF t1 t1(natural GMSB) 2 e, µ (Z) 1 b Yes 20.7 t1 500 GeV m( χ0 1)>150 GeV ATLAS-CONF t2 t2, t2 t1 + Z 3 e, µ (Z) 1 b Yes 20.7 t2 520 GeV m( t1)=m( χ0 1)+180 GeV ATLAS-CONF ll,r ll,r, l l χ0 1 2 e, µ 0 Yes 20.3 l GeV m( χ 0 1)=0 GeV ATLAS-CONF χ + 1 χ 1, χ + 1 lν(l ν) 2 e, µ 0 Yes 20.3 χ ± GeV m( χ 0 1)=0 GeV, m( l, ν)=0.5(m( χ ± 1 )+m( χ 0 1 1)) ATLAS-CONF χ + 1 χ 1, χ + 1 τν(τ ν) 2 τ 0 Yes 20.7 χ ± GeV m( χ 0 1)=0 GeV, m( τ, ν)=0.5(m( χ ± 1 )+m( χ 0 1 1)) ATLAS-CONF χ ± 1 χ0 2 llν lll( νν), l ν lll( νν) 3 e, µ 0 Yes 20.7 χ ± 600 GeV m( χ ± 1 )=m( χ 0 2), m( χ 0 1)=0, m( l, ν)=0.5(m( χ ± 1 )+m( χ 0 1)) ATLAS-CONF , χ0 2 χ ± 1 χ0 2 W χ0 1Z χ0 3 e, µ 1 0 Yes 20.7 χ ± 315 GeV m( χ ± 1 )=m( χ 0 2), m( χ 0 1)=0, sleptons decoupled ATLAS-CONF , χ0 2 Long-lived particles RPV Direct χ + 1 χ 1 prod., long-lived χ ± jet Yes 4.7 χ ± 1<τ( χ ± GeV 1 )< ns Stable, stopped g R-hadron jets Yes 22.9 g 857 GeV m( χ 0 1)=0 GeV, µs<τ( g)<00 s ATLAS-CONF GMSB, stable τ 1-2 µ τ 385 GeV 5<tanβ<50 ATLAS-CONF Direct τ τ prod., stable τ or l 1-2 µ τ 395 GeV m( τ)=m( l) ATLAS-CONF GMSB, χ 0 1 γ g, long-lived χ γ 0 Yes 4.7 χ GeV 0.4<τ( χ 0 1)<2 ns χ 0 1 qqµ (RPV) 1 µ 0 Yes 4.4 q 700 GeV 1 mm<cτ<1 m, g decoupled LFV pp ντ + X, ντ e + µ 2 e, µ ντ 1.61 TeV λ 311 =0., λ132= LFV pp ντ + X, ντ e(µ) + τ 1 e, µ + τ ντ 1.1 TeV λ 311 =0., λ 1(2)33= Bilinear RPV CMSSM 1 e, µ 7 jets Yes 4.7 q, g 1.2 TeV m( q)=m( g), cτlsp<1 mm ATLAS-CONF χ + 1 χ 1, χ + 1 W χ 0 1, χ 0 1 ee νµ, eµ νe 4 e, µ 0 Yes 20.7 χ ± m( χ GeV 1)>300 GeV, λ121>0 ATLAS-CONF χ + 1 χ 1, χ + 1 W χ 0 1, χ 0 1 ττ νe, 3 e, µ + τ eτ ντ 0 Yes 20.7 χ ± m( χ GeV 1)>80 GeV, λ133>0 ATLAS-CONF g qqq 0 6 jets g 666 GeV g t1t, t1 bs 2 e, µ (SS) 0-3 b Yes 20.7 g 880 GeV ATLAS-CONF Other Scalar gluon 0 4 jets sgluon GeV incl. limit from WIMP interaction (D5, Dirac χ) 0 mono-jet Yes.5 M* scale 704 GeV m(χ)<80 GeV, limit of<687 GeV for D8 ATLAS-CONF s = 7 TeV full data s = 8 TeV partial data s = 8 TeV full data 1 1 Mass scale [TeV] *Only a selection of the available mass limits on new states or phenomena is shown. All limits quoted are observed minus 1σ theoretical signal cross section uncertainty.

56 Future M. Hance 52 / 46 Particle Physics at the LHC- July 11, 2013