SUSY simplified models at 14, 33, and 100 TeV proton colliders

Timothy Cohen 4 Tobias Golling 2 Mike Hance 3 Anna Henrichs 2 Kiel Howe 0 4 Joshua Loyal 2 Sanjay Padhi 1 Jay G. Wacker 4 0 Stanford Institute for Theoretical Physics, Stanford University , Stanford, CA, U.S.A 1 Physics Department, University of California San Diego , San Diego, CA, U.S.A 2 Physics Department, Yale University , New Haven, CT, U.S.A 3 Lawrence Berkeley National Laboratory , Berkeley, CA, U.S.A 4 Theory Group, SLAC National Accelerator Laboratory , Menlo Park, CA, U.S.A Results are presented for a variety of SUSY Simplified Models at the 14 TeV LHC as well as a 33 and 100 TeV proton collider. Our focus is on models whose signals are driven by colored production. We present projections of the upper limit and discovery reach in the gluino-neutralino (for both light and heavy flavor decays), squark-neutralino, and gluino-squark Simplified Model planes. Depending on the model a jets + Emiss, monoT jet, or same-sign di-lepton search is applied. The impact of pileup is explored. This study utilizes the Snowmass backgrounds and combined detector. Assuming 3000 fb1 of integrated luminosity, a gluino that decays to light flavor quarks can be discovered below 2.3 TeV at the 14 TeV LHC and below 11 TeV at a 100 TeV machine. Contents 1 Introduction 2 3 4 The gluino-neutralino model with light flavor decays 3.1 Dominant backgrounds 3.2 Analysis strategy 3.3 Analysis: 14 TeV 3.4 Results: 14 TeV 3.5 Analysis: 33 TeV 3.6 Results: 33 TeV 3.7 Analysis: 100 TeV 3.8 Results: 100 TeV 3.9 Comparing colliders 3.10 Comparing optimization strategies 3.11 Impact of systematic uncertainties 3.12 Impact of pileup The compressed gluino-neutralino model with light flavor decays 4.1 Dominant backgrounds 4.2 Two analysis strategies: 14 TeV 4.3 Results: 14 TeV 4.4 Analysis: 33 TeV 4.5 Results: 33 TeV 4.6 Analysis: 100 TeV 4.7 Results: 100 TeV 4.8 Comparing colliders 4.9 Impact of systematic uncertainties 4.10 Impact of pileup The squark-neutralino model 5.1 Analysis: 14 TeV 5.2 Results: 14 TeV 5.3 Analysis: 33 TeV 5.4 Results: 33 TeV 5.5 Analysis: 100 TeV 5.6 Results: 100 TeV 5.7 Comparing colliders i 1 4 6 The compressed squark-neutralino model 6.1 Analysis: 14 TeV 6.2 Results: 14 TeV 6.3 Analysis: 33 TeV 6.4 Results: 33 TeV 6.5 Analysis: 100 TeV 6.6 Results: 100 TeV 6.7 Comparing colliders 7 The gluino-squark-neutralino model 7.1 Analysis: 14 TeV 7.2 Results: 14 TeV 7.3 Analysis: 33 TeV 7.4 Results: 33 TeV 7.5 Analysis: 100 TeV 7.6 Results: 100 TeV 7.7 Comparing colliders 8 The gluino-neutralino model with heavy flavor decays 8.1 Dominant backgrounds 8.2 Analysis strategy 8.3 Analysis: 14 TeV 8.4 Results: 14 TeV 8.5 Analysis: 33 TeV 8.6 Results: 33 TeV 8.7 Analysis: 100 TeV 8.8 Results: 100 TeV 8.9 Comparing colliders 9 Outlook A Simulation framework 1 Introduction Simplified Model Gluino-neutralino with light flavor decays Squark-neutralino Gluino-squark with a massless neutralino Gluino-neutralino with heavy flavor decays Decay Channel energy. We study the impact of pileup conditions to estimate how our conclusions could be altered by the harsh environments of running proton colliders at high instantaneous luminosity. Additional studies on the impact of systematic uncertainties are provided for a few models. Discovery reach and exclusions limits are given for the following collider scenarios: LHC Phase I HL-LHC or LHC Phase II s 14 TeV 14 TeV 33 TeV 100 TeV Final Integrated Luminosity 300 fb1 3000 fb1 3000 fb1 3000 fb1 Validation The gluino-neutralino model with light flavor decays In the gluino-neutralino model with light flavor decays, the gluino ge is the only kinematically accessible colored particle. The squarks are completely decoupled and do not contribute to gluino production diagrams. The gluino undergoes a prompt three-body decay through off-shell squarks, ge q q e01, where q = u, d, c, s are the first and second generation quarks and e10 is a neutralino LSP. The branching ratios to all four flavors of light quark are taken to be equal. The only two relevant parameters are the gluino mass mg and the neutralino mass me01 . This model can be summarized by: e p p ge ge 1 GeV (0.2, 0.4, 0.6, 0.7, 0.8, 0.9) mg e mge (100 GeV, 50 GeV, 15 GeV, 5 GeV) We find that including pileup does not significantly change the results of this study and present results below for only the no-pileup case. We discuss the effect of pile-up in more detail in section 3.12. Dominant backgrounds Analysis strategy 1We include 1 GeV for an example where the neutralino is effectively massless; the second line of neutralino masses is chosen to cover the bulk of the gluino-neutralino plane; the final line is chosen to ensure coverage in the compressed region. Preselection. zero selected electrons or muons at least 4 jets with pT > 60 GeV Search strategy: simultaneous optimization over HT and ETmiss. Emiss/HT > 15 GeV1/2 T The leading jet pT must satisfy pleading < 0.4 HT T Emiss > (ETmiss)optimal T HT > (HT )optimal Analysis: 14 TeV 00104 t/s1103 en102 vE10 1 10-1 0 0 1000 2000 3000 4000 5000 6000 HT [GeV] ETmiss/HT > 15 GeV1/2 ETmiss > 450 GeV HT > 800 GeV ETmiss > 800 GeV HT > 1650 GeV ETmiss > 1050 GeV HT > 2600 GeV Analysis: 33 TeV Results: 33 TeV 0[]eTV1 3 psp= ~g1~g4TeqqV01qq01 m 2.5 0 Extra Int/Crossing Ldt = 300 fb-1 0[]eTV1 3 psp= ~g1~g4TeqqV10qq01 m 2.5 0 Extra Int/Crossing Ldt = 300 fb-1 -1 1010 ab109 in3108 V107 eG106 0105 0 /1104 tsn103 ve102 E10 1 10-1 0 -1 1010 ab109 in3108 V107 e0G110065 0 /2104 tvsne110032 E10 1 10-1 0 Emiss [GeV] tainty is applied to the backgrounds. The assumed signal systematic are outlined in the appendix. Pileup is not included; a demonstration that pileup will not significantly change these results is given in section 3.12 below. ETmiss/HT > 15 GeV1/2 HT > 1900 GeV ETmiss > 2100 GeV HT > 3800 GeV ETmiss > 2750 GeV HT > 5150 GeV Analysis: 100 TeV 5 Y 4.5 SSU Results: 100 TeV ETmiss/HT > 15 GeV1/2 HT > 9550 GeV ETmiss > 5530 GeV HT > 9750 GeV ETmiss > 6150 GeV HT > 11700 GeV applied to the backgrounds. The assumed signal systematic are outlined in the appendix. Pileup is not included; a demonstration that pileup will not significantly change these results is given in section 3.12 below. Using the NLO gluino pair production cross section one can make a very naive estimate for the reach of a given collider. For example, we find that the choice of gluino mass which would yield 10 events at 3000 fb1 is 16.1 TeV. This roughly corresponds to the maximal possible reach one could expect for a given luminosity using 100 TeV proton collisions. Using a realistic simulation framework along with the search strategy employed here the 100 TeV 3000 fb1 limit with massless neutralinos is projected to be 13.5 TeV (corresponding to 60 events). Furthermore, the 100 TeV proton collider with 3000 fb1 could discover a gluino as heavy as 11 TeV if the neutralino is mass (...truncated)