Processing math: 100%
CMS logoCMS event Hgg
Compact Muon Solenoid
LHC, CERN

CMS-PAS-FTR-18-017
Projection of the Run 2 MSSM Hττ limits for the High-Luminosity LHC
Abstract: A search for heavy Higgs bosons decaying to τ leptons was previously performed using data collected during Run 2 of the LHC, based on a data set of proton-proton collisions at s= 13 TeV corresponding to an integrated luminosity of 35.9 fb1. A projection of these results to a High-Luminosity LHC data set of 3000 fb1 is described. For neutral Higgs boson masses above 1 TeV, an improvement by about one order of magnitude is expected in the 95% confidence level upper limits on the cross section. For the benchmark scenario mmod+h of the minimal supersymmetric extension of the standard model, the expected lower limit on the mass of a heavy Higgs boson is extended from 1.25 to 2 TeV for tanβ= 36.
Figures Summary References CMS Publications
Figures

png pdf
Figure 1:
Projection of expected model independent 95% CL upper limits based on 2016 CMS data [10] for ggH and bbH production with subsequent Hττ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10].

png pdf
Figure 1-a:
Projection of expected model independent 95% CL upper limits based on 2016 CMS data [10] for ggH production with subsequent Hττ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10].

png pdf
Figure 1-b:
Projection of expected model independent 95% CL upper limits based on 2016 CMS data [10] for bbH production with subsequent Hττ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10].

png pdf
Figure 2:
Projection of expected model-independent limits based on 2016 CMS data [10] for ggH and bbH production with subsequent Hττ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb1.

png pdf
Figure 2-a:
Projection of expected model-independent limits based on 2016 CMS data [10] for ggH production with subsequent Hττ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb1.

png pdf
Figure 2-b:
Projection of expected model-independent limits based on 2016 CMS data [10] for bbH production with subsequent Hττ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb1.

png pdf
Figure 3:
Projection of expected model-independent limits based on 2016 CMS data [10] for a simultaneous fit to the ggH and bbH production cross sections with subsequent Hττ decays, for an integrated luminosity of 3000 fb1 and with YR18 systematic uncertainties.

png pdf
Figure 3-a:
Projection of expected model-independent limits based on 2016 CMS data [10] for a simultaneous fit to the ggϕ and bbϕ (mϕ= 25 GeV) production cross sections with subsequent ϕττ decays, for an integrated luminosity of 3000 fb1 and with YR18 systematic uncertainties.

png pdf
Figure 3-b:
Projection of expected model-independent limits based on 2016 CMS data [10] for a simultaneous fit to the ggϕ and bbϕ (mϕ= 400 GeV) production cross sections with subsequent ϕττ decays, for an integrated luminosity of 3000 fb1 and with YR18 systematic uncertainties.

png pdf
Figure 3-c:
Projection of expected model-independent limits based on 2016 CMS data [10] for a simultaneous fit to the ggϕ and bbϕ (mϕ= 700 GeV) production cross sections with subsequent ϕττ decays, for an integrated luminosity of 3000 fb1 and with YR18 systematic uncertainties.

png pdf
Figure 3-d:
Projection of expected model-independent limits based on 2016 CMS data [10] for a simultaneous fit to the ggϕ and bbϕ (mϕ= 3200 GeV) production cross sections with subsequent ϕττ decays, for an integrated luminosity of 3000 fb1 and with YR18 systematic uncertainties.

png pdf
Figure 4:
Projection of expected MSSM Hττ 95% CL upper limits based on 2016 data [10] for different benchmark scenarios, with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10]; for the tau-phobic scenario, it is a new interpretation of the information given in this reference.

png pdf
Figure 4-a:
Projection of expected MSSM Hττ 95% CL upper limits based on 2016 data [10] for the mmod+h scenario with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10].

png pdf
Figure 4-b:
Projection of expected MSSM Hττ 95% CL upper limits based on 2016 data [10] for the hMSSM scenario with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10].

png pdf
Figure 4-c:
Projection of expected MSSM Hττ 95% CL upper limits based on 2016 data [10] for the tau-phobic scenario with YR18 systematic uncertainties. The limit shown for 6000 fb1 is an approximation of the sensitivity with the complete HL-LHC dataset to be collected by the ATLAS and CMS experiments, corresponding to an integrated luminosity of 3000 fb1 each. The limits are compared to the CMS result using 2016 data [10]; it is a new interpretation of the information given in this reference.
Summary
The HL-LHC projections of the most recent results on searches for neutral MSSM Higgs bosons decaying to τ leptons have been shown, based on a data set of proton-proton collisions at s= 13 TeV collected in 2016, corresponding to a total integrated luminosity of 35.9 fb1. The assumed integrated luminosity for the HL-LHC is 3000 fb1. In terms of cross section, an order-of-magnitude improvement in sensitivity is expected for neutral Higgs boson masses above 1 TeV since here the current analysis is statistically limited by the available integrated luminosity. For lower masses, an improvement of approximately a factor of five is expected for realistic assumptions on the evolution of the systematic uncertainties. For the MSSM benchmarks, the sensitivity will reach up to Higgs boson masses of 2 TeV for values of tanβ of 36, 26, and 28 for the mmod+h, the hMSSM, and the tau-phobic scenarios, respectively.
References
1 ATLAS Collaboration Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC PLB 716 (2012) 1 1207.7214
2 CMS Collaboration Observation of a new boson at a mass of 125~GeV with the CMS experiment at the LHC PLB 716 (2012) 30 CMS-HIG-12-028
1207.7235
3 CMS Collaboration Observation of a new boson with mass near 125 GeV in pp collisions at s= 7 and 8 TeV JHEP 06 (2013) 081 CMS-HIG-12-036
1303.4571
4 \relax Yu. A. Golfand and E. P. Likhtman Extension of the Algebra of Poincare Group Generators and Violation of p Invariance JEPTL 13 (1971) 323.[Pisma Zh. Eksp. Teor. Fiz.13,452(1971)]
5 J. Wess and B. Zumino Supergauge Transformations in Four-Dimensions NPB 70 (1974) 39
6 P. Fayet Supergauge Invariant Extension of the Higgs Mechanism and a Model for the electron and Its Neutrino NPB 90 (1975) 104
7 P. Fayet Spontaneously Broken Supersymmetric Theories of Weak, Electromagnetic and Strong Interactions PLB 69 (1977) 489
8 CMS Collaboration Search for charged Higgs bosons with the H±τ±ντ decay channel in proton-proton collisions at s= 13 TeV CMS-PAS-HIG-18-014 CMS-PAS-HIG-18-014
9 CMS Collaboration Search for beyond the standard model Higgs bosons decaying into a b¯b pair in pp collisions at s= 13 TeV JHEP 08 (2018) 113 CMS-HIG-16-018
1805.12191
10 CMS Collaboration Search for additional neutral MSSM Higgs bosons in the ττ final state in proton-proton collisions at s= 13 TeV JHEP 09 (2018) 007 CMS-HIG-17-020
1803.06553
11 CMS Collaboration The CMS Experiment at the CERN LHC JINST 3 (2008) S08004 CMS-00-001
12 G. Apollinari et al. High-Luminosity Large Hadron Collider (HL-LHC) : Preliminary Design Report CERN-2015-005(2015)
13 CMS Collaboration Technical Proposal for the Phase-II Upgrade of the CMS Detector CMS-PAS-TDR-15-002 CMS-PAS-TDR-15-002
14 CMS Collaboration The Phase-2 Upgrade of the CMS Tracker CDS
15 CMS Collaboration The Phase-2 Upgrade of the CMS Barrel Calorimeters CDS
16 CMS Collaboration The Phase-2 Upgrade of the CMS Endcap Calorimeter CDS
17 CMS Collaboration The Phase-2 Upgrade of the CMS Muon Detectors CDS
18 CMS Collaboration CMS Phase-2 Object Performance
19 CMS Collaboration Projected performance of Higgs analyses at the HL-LHC for ECFA 2016 CMS-PAS-FTR-16-002 CMS-PAS-FTR-16-002
20 CMS Collaboration Measurement of the Zγττ cross section in pp collisions at s= 13 TeV and validation of τ lepton analysis techniques EPJC 78 (2018) 708 CMS-HIG-15-007
1801.03535
21 M. Carena et al. MSSM Higgs Boson Searches at the LHC: Benchmark Scenarios after the Discovery of a Higgs-like Particle EPJC 73 (2013) 2552 1302.7033
Compact Muon Solenoid
LHC, CERN