CMS Searches for SUSY in Hadronic Final States
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1 CMS Searches for SUSY in Hadronic Final States Teruki Kamon on behalf of the CMS Collaboration Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University JnHF 2018: Santa Fe Jets and Heavy Flavor Workshop Jan 2018, Santa Fe, NM (United States) January 2018 CMS SUSY 1
2 OUTLINE 3 Where will the next new physics be discovered? My daughter s view of SUSY hunting. "Using jets and heavy flavor products to search for supersymmetry with CMS" ǁ 1) CMS physics objects (jets, b, top, tau) for hadronic states 2) CMS searches for SUSY colored sectors ( g, q) and τ (*) 3) Summary (*) see Appendix. 2
3 CMS Operation and Papers Schematic view of the CMS 12,500 ton Detector with its main components. L int N papers 3
4 links CMS Physics Triggers JINST 12 (2017) P ) Tagging energetic jets (+ MET) from cascade decays 2) Tagging leptons 3) Tagging photons 4) Tagging with timing 5) ISR jet(s), VBF dijet 6) E T miss Particle IDs with Particle Flow JINST 12 (2017) P E T miss
5 σ(u ) Particle Flow (PF) Algorithm All particles (charged hadrons, neutral hadrons, γ, e, μ) are reconstructed with the PF algorithm (with corresponding calibrations). The list of particles is given to the jet clustering, missing E T (MET or E T miss ), and τ reconstruction algorithms Plus Pileup (PU) per particle identification (PUPPI) Maintain good resolution and energy scale of those physcs objects with PU Maintain good background rejection ifor lepton isolation PAS JME PF E T miss PUPPI E T miss # Vertices 5
6 Challenges with High Luminosity (= PU) CMS-PAS-JME Data/MC E T miss u u Barrel Pixel Hit efficiency u / q T CMS-DP Muon reconstruction efficiency 6
7 Examples of Particle ID Performance m e t h j t h 7
8 CMS-PAS-BTV Tagging Boosted Objects CMS-PAS-JME ΔR~ 2m particle p T 8
9 One-page Simplified SUSY Summary Fermion Boson R parity conserving SUSY: stable lightest neutralino ( χ 1 0 lightest non-colored gaugino) cold dark matter candidate After EW symmetry breaking, W H H 0 1 ( B,, d, u ) W H u (, ) 1 ( W, H d ) Example of SUSY Spectrum [Credits] Images of Baryon Acoustic Bscillations with Cosmic Microwave Background by E.M. Huff, the SDSS-III team, and the South Pole Telescope team. Graphic by Zosia Rostomian (Lawrence Berkeley National Laboratory) Image of Neutrino Astrophysics, taken from Image of the LHC by CERN Photo Image of Bullet Cluster by NASA/ Chandra X-ray Center 9
10 LHC SUSY Exploration Map Probing a TeV scale at LHC13 No hints of NP (yet) in very diverse search programs Compressed Mass Scenario? m g or q [Simplified Models] MSSM (>100 parameters) - impossible to have more than 100 measurements at the LHC. Consider a way to test a minimal scenario or simplified scenario, first. [R-parity] R-parity conserving SUSY (with a DM candidate) R-parity violating SUSY (with a DM candidate from somewhere else) 10
11 Squarks/Gluinos Menu 11
12 Squarks/Gluinos Searches SUS H T miss H T miss > 300 GeV H T > 300 GeV N jets 2 H T 12
13 Squarks/Gluinos Results g തq q തqq χ 1 0 m q = 13
14 Closer look at Squarks Results [Q] Do we still care of the extremly compressed mass scenario? 14
15 Gluinos with b-jets Results g തb b തbb χ 1 0 m b = 15
16 m b m χ 1 0 = 5 GeV Bottom Squarks VBF: SUS GeV 250 GeV Monojet: SUS g Monojet & 2b SUS (8 TeV) 16
17 Gluino with H( bb) g തq q തqq χ 2 0 m q = m g m χ2 0 = 50 17
18 Gluino with H( bb) Results CMS-SUS ; CERN-EP χ 2 0 H χ 1 0 or Z χ 1 0 in heavy gluino ( g) decay high p T H bb decay with small opening angle Event with p T miss > 300 GeV; Use large cone (AK8) jets to capture full Higgs decay (presence of two displaced subjets). Jet mass shows clear peaking structure Search for 2H and 1H events (T5HH and T5HZ models) T5HZ T5HH 18
19 Top Squarks m m m Stop decay Stop mixing & neutralino/chargino composition & t
20 Top Squark Results Searches with 0l + 1l +2l Teruki Kamon CMS SUSY 20
21 CMS-PAS-SUS Top Sqaurk Results 2 3 CMS-SUS ; CERN-EP
22 Gluino with Top Quarks m ሚ t m χ1 0 = small 1 m ሚ t = 22
23 Gluino with Tops Results CMS-SUS ; CERN-EP Top (t) quarks in top squarks ( ǁ t) or gluinos ( g) decay high p T t decay with small opening angle Event with p T miss > 250 GeV and H T > 300 GeV; Use AK8 jets to capture full top decay (3 subjets); two or three AK4 jets Search for 1t and 1b events 23
24 Gluino with Tops Results CMS-SUS ; CERN-EP m( t)-m( ǁ χǁ 0 1 )=20 GeV 24
25 Electroweak Gauginos Squarks Gluinos Summary of Run2 in Covering a large variety of possible final states even with <PU> ~25-50 Setting stringent limits on many SUSY scenarios including compressed mass SUSY. See the public result pages: GeV 2000 GeV 25
26 Cross Sections [1982] W and Z with e, μ Now full measurements CMS Preliminary σ [1995] ttҧ miss with l + jets/b + E T Now full measurements [2012] H(125) with γγ, 4l Now full measurements 1 fb 26
27 Remarks on Run2 and Beyond We may see a deviation from the SM somewhere,,, 2000 GeV The strong coupling α S (Q) (solid line) and its total uncertainty (band) as determined in JHEP 03 (2017) 156 analysis using a 2-loop solution to the RGE as a function of the momentum transfer Q = p T. Combined/As_running_ALL.pdf Measured values the P5' coefficient in the angular analysis of the B 0 K 0 μ + μ decay performed by CMS, compared with previous experimental results and several predictions. Values are measured as a function of the invariant mass of the dimuon system (q 2 ). 27
28 X Events/10 GeV Data Excess? in Inclusive E T miss + Jets X MHT = 693 GeV & HT = 1132 GeV M eff = MHT + HT = 1.83 TeV No b-tagged jet & No isolated lepton Incompatible with W or top mass Invisible Z??? An Excess Not Good Enough 28
29 Run2 SUSY List Channel PAS/arXiv Conference stau (1L/2L) SUS SUSY2017 sleptons SUS SUSY2017 gluino / boosted H SUS SUSY2017 Channel PAS/arXiv Confrence 0L + top tag SUS LHCP 1L compressed stop SUS EPS Hadronic staus SUS EPS Ewkino combination SUS EPS 1L RPV SUS LP Channel PAS/arXiv Channel PAS/arXiv 0L + jets with MHT 0L + jets with MT2 1L + jets + MET with MJ 1L + jets + MET with ΔΦ SUS Photon + MET SUS SUS Photon + HT SUS SUS Stop 0L SUS SUS Stop 1L SUS SS Leptons SUS Stop 2L SUS multilepton EWK multileptons + jets SUS SUS Sbottom and compressed stop GMSB Higgsinos in 4b SUS SUS L soft SUS OS leptons SUS Razor + H γγ SUS EWK WH(bb) SUS
30 Appendix: Tau Spelton Pair with Taus CMS-PAS-SUS Hadronically decayoing tau (τ h ) leptons in tau slepton ( τ) ǁ decay miss Event with M T2, Δφ(ττ), ΣM T, and/or p T Search for OS 2τ 30
31 Appendix: Tau Slepton Pair with Taus CMS-PAS-SUS m( χ 1 0 )= 1 GeV m( χǁ 0 1 )= 1 GeV m( χǁ 0 1 )= 20 GeV τǁ L m( χǁ 0 1 )= 50 GeV τǁ L τǁ mixed τǁ R 31
32 Appendix: Tau Slepton Pair with Taus CMS-PAS-SUS τ h + l or e + μ from tau leptom decays Event with Δφ(ττ), ΣM T, and/or p T miss Search for OS 2τ m( χǁ 0 1 )= 1 GeV m( χǁ 0 1 )= 20 GeV m( χǁ 0 1 )= 20 GeV m( χǁ 0 1 )= 30 GeV 32
33 Chargino-Neutralino Pair with Taus CMS-PAS-SUS τ h + l or e + μ from tau leptom decays Event with Δφ(ττ), ΣM T, and/or p T miss Search for OS 2τ 33
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