Prospect of New Physics Searches using HL-LHC On behalf of the - PowerPoint PPT Presentation

Prospect of New Physics Searches using HL-LHC On behalf of the ATLAS and CMS Collaborations Altan Cakir DESY

� The Standard Model is incomplete: big questions Dark matter? SM matter fermion masses  10 − 5  − 0.002 0.007 + 0.004 i d s b 10 − 6 Y U ≈ 0.007 − 0.04 + 0.0008 i   10 − 8 + 10 − 7 i 0.0003 0 . 92 0.96 u c t e ν 1 ν 2 ν 3 µ τ µ eV meV eV keV MeV GeV TeV Most in interestin ing t theorie ies o offer s solu lutio ions t to o open p proble lems o of t the S SM? � Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 2

� � � Why do we need HL-LHC? CMS Integrated Luminosity, pp WJS2012 Data included from 2010-03-30 11:21 to 2012-12-16 20:49 UTC 100 Ø The dis 25 25 iscovery of new physic ics is one of Total Integrated Luminosity ( fb ¡ 1 ) ratios of LHC parton luminosities: 2010, 7 TeV, 44.2 pb ¡ 1 the highest priorities for the current and 8 TeV / 7 TeV and 14 TeV / 7 TeV 2011, 7 TeV, 6.1 fb ¡ 1 future LHC � 2012, 8 TeV, 23.3 fb ¡ 1 20 20 gg _ luminosity ratio Ø The mult Σ qq lti- i-TeV TeV e energy range will not be 15 15 qg accessible at any other current facility. � 10 Ø Stra Strate tegy: gy: take e exis istin ing s searches a and f fig igure 10 10 out r reach a at 1 14 TeV TeV, f for d dif ifferent lu lumin inosit itie ies! � 5 5 £ 100 þ sig ignif ific icant im impact o on t the p physic ics r reach o of MSTW2008NLO 1 CMS a and A ATLAS beyond that gained by 0 0 100 1000 r y n l g p t v c u p a c e u u e o J O A M N D J A S 1 M X (GeV) accumulating 10 10 or or 1 100 times more data. � 1 1 1 1 1 1 1 1 Date (UTC) arXiv:1307.7135 à arXiv:1307.7135 à use ratio of use ratio of partonic partonic luminosities luminosities o Discuss expected sensitivity to broad range of Beyond the SM benchmark models for new physics searches at the CMS and ATLAS collaborations. � Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 3

� Outline: HL-LHC Analyses Ø Supe Supersymme rsymmetry try S Searches � o Strongly produced SUSY: gluino and New Physics SM+TOP squarks searches � o Third generation SUSY: direct stop and HL-LHC direct sbottom searches � o Electroweak production of SUSY particles � o Vector Boson Fusion in SUSY � Ø Vector b boson s scatterin ing a and Trib iboson HIGGS productio ion � Ø Vector-lik -like c charge 2 2/3 q quark s search � Ø Search f for ttbar ttbar a and dile ilepton r resonances � ATLAS-PHYS-PUB-2013-003, CMS-NOTE-13-002, ATLAS-PHYS-PUB-2013-007, CMS-FTR-13-006, Ø Search f for W W` a and D Dark M Matter � ATLAS-PHYS-PUB-2013-011, CMS-FTR-13-014, ATLAS-PHYS-PUB-2014-010 CMS-FTR-13-026 ATLAS Collaboration à https://twiki.cern.ch/twiki/bin/view/AtlasPublic/UpgradePhysicsStudies � CMS Collaboration à https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsFP � Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 4

� Studies of Future Physics Prospects Both CMS and ATLAS studies have been performed for 5 σ discovery reach with 300(0) fb -1 @ 14 TeV based on 20 fb -1 @ 8 TeV � ① all yields and uncertainties scaled by lumi and cross-section � ② relative background uncertainty is assumed to be same � CMS Integrated Luminosity, pp arXiv:1307.7135 WJS2012 Data included from 2010-03-30 11:21 to 2012-12-16 20:49 UTC 100 25 25 ratios of LHC parton luminosities: Total Integrated Luminosity ( fb ¡ 1 ) 2010, 7 TeV, 44.2 pb ¡ 1 8 TeV / 7 TeV and 14 TeV / 7 TeV 2011, 7 TeV, 6.1 fb ¡ 1 ¤ Only slight analysis re-optimization � 2012, 8 TeV, 23.3 fb ¡ 1 20 20 gg _ ¤ No potential degradation studies � luminosity ratio Σ qq 15 15 qg ¤ All analyses have individual approach for 10 projections: � 10 10 5 5 taken into account relevant parameters � £ 100 MSTW2008NLO 1 0 0 100 1000 1 May 1 Jun 1 Aug 1 Dec 1 Apr 1 Jul 1 Sep 1 Oct 1 Nov M X (GeV) Date (UTC) Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 5

Searches for Supersymmetry at HL-LHC Ø The strongest motivation for Supersymmetry (SUSY) comes from the need to stabilize the mass of the Higgs boson. � Ø The mass of the Higgs boson receives quadratic radiative corrections from particles at higher energy scales . � µ ∼ m h ∼ 125 GeV EWK SUSY ! sector and: ! Stop and gluino contribution In o order t to b be “ natural ” ( (i. i.e. t to a avoid id f fin ine t tunin ing), it it is is r requir ired t that t the m mass o of t the top top squar squark is is r rela lativ ively ly s small. ll. Sim imila ilar r requir irements a are v valid lid f for t the m mass o of t the sbottom sbottom(s (s), t the hig iggsin inos, a and t the glu luin inos; � ~ q t P 2 t g ˜ ~ g Simplified Models (SMS's): � χ 0 ˜ 1 T eV 1 χ 0 focus on very specific decays, � ˜ 1 ˜ g t strong assumptions are made � P 1 ~ χ 0 t 100 GeV 1 Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 6

� Strongly produced SUSY 3rd generation squarks expected to be light compared to 1st and 2nd generation. Gluinos can decay with large branching fraction to 3 rd generation squarks � t P 2 t ˜ g χ 0 ˜ 1 χ 0 ˜ 1 g ˜ t P 1 t Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 7

� Strongly produced SUSY and Current Limits 3rd generation squarks expected to be light compared to 1st and 2nd generation. Gluinos can decay with large branching fraction to 3 rd generation squarks � t P 2 t g ˜ χ 0 ˜ 1 χ 0 ˜ 1 g ˜ t P 1 t ~ ~ ~ ∼ 0 g - g production, g t t → χ ~ ~ ~ ∼ 0 ~ ~ ICHEP 2014 g g production, g t t , m( q ) >> m( g ), s = 8 TeV 1 → χ 1 [GeV] LSP mass [GeV] CMS Preliminary 1000 95% CL limits. SUSY not included. 900 ATLAS σ -1 SUS-13-012 0-lep ( E +H ) 19.5 fb theory T T Expected -1 0-lepton, 7 - ≥ 10 jets [L = 20.3 fb ] Preliminary -1 SUS-14-011 0+1+2-lep (razor) 19.3 fb int s = 8 TeV 0 1 Observed arXiv: 1308.1841 ∼ χ m Expected -1 800 SUS-13-007 1-lep (n ≥ 6) 19.3 fb -1 0-1 lepton, ≥ 3 b-jets [L = 20.1 fb ] ICHEP 2014 jets Observed int arXiv: 1407.0600 -1 SUS-13-016 2-lep (OS+b) 19.7 fb Observed Observed -1 2SS/3 leptons, 0 - ≥ 3 b-jets [L = 20.3 fb ] 800 Expected -1 SUS-13-013 2-lep (SS+b) 19.5 fb int SUSY arXiv: 1404.2500 700 Observed -1 σ theory -1 SUS-13-008 3-lep (3l+b) 19.5 fb Expected 600 600 m(gluino) - m(LSP) = 2 m(top) 500 n e d d i b 400 o r f 0 ∼ χ t 1 400 t → ~ g 300 200 200 100 0 600 800 1000 1200 1400 1600 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 m [GeV] ~ gluino mass [GeV] g Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 8

� � Monte-Carlo Samples Several Monte-Carlo (MC) generators are used to model the dominant SM processes and new physics signals relevant for the analyses. � Top-pair � Top-pair � Sherpa SM Background � Diboson � Diboson � W(*)+jets � W(*)+jets � Madgraph Alpgen Z(*)+jets � Z(*)+jets � ttV (V=W,Z) � ttV (V=W,Z) � Madgraph WWW,ZZZ, ZWW � WWW,ZZZ, ZWW � Signal Samples � Signal Samples � Signal � Herwig++ Madgraph and Pythia6 Prospino (xsec) � Prospino (xsec) � PDF`s � cteq6l1 Madgraph and CT10 Cteq6l1 and CT10 � MC@NLO and Sherpa � Detector � ATLAS fast simulation, based on Delphes fast simulation with CMS tuning, a few parametrization of the trigger and detector SM processes produced with full-simulation to response to generator level objects � validate Delphes simulation. � Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 9

Strongly produced SUSY: Gluino Searches CMS-PAS-FTR-13-014 (ECFA 2013) t Sig ignal t l topolo logy o of s such e events: � P 2 • Many jets and Leptons � t g ˜ • Among them several b-jets � χ 0 ˜ 1 • Large missing energy (E T Miss ) � χ 0 ˜ 1 g ˜ t P 1 t Pre-s -sele lectio ion o of e events b based o on: � • An isolated electron (muon) p T >20 GeV and | η |<2.5 (2.1) � N pred SM ( ∆ φ ( W , ` ) > 1 ) = R CS · N data ( ∆ φ ( W , ` ) < 1 ) . • Leptons veto p T >15 GeV, | η |<2.5 � Control region � • nJets>6 p T >40 GeV, | η |<2.4 � Signal region � • At least one b-tagged jet � Lep (MET + Σ i Search regions: different S T • HT> 500 GeV and S Tlep >250 GeV � LepPt i ) bins with different b-tagged jets � • Δ ϕ (W, Lepton) � N signal = Number of events with ∆ φ ( W , ` ) > 1 R CS = Number of events with ∆ φ ( W , ` ) < 1. Single Lepton + b-tagged jets final state N control Altan Cakir | Prospect of New Physics Searches using HL-LHC | Fermilab 2014 | Page 10