CMS-PAS-FTR-18-017

CMS-PAS-FTR-18-017
Projection of the Run 2 MSSM $\text{H} \to \tau\tau$ limits for the High-Luminosity LHC
CMS Collaboration
December 2018

Abstract: A search for heavy Higgs bosons decaying to $\tau$ leptons was previously performed using data collected during Run 2 of the LHC, based on a data set of proton-proton collisions at $\sqrt{s}=$ 13 TeV corresponding to an integrated luminosity of 35.9 fb $^{-1}$ . A projection of these results to a High-Luminosity LHC data set of 3000 fb $^{-1}$ 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 $m_{\text{h}}^{\text{mod+}}$ 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 $\tan \beta =$ 36.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ;

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 ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ 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 ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ 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 ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ 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 ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb $^{-1}$ .
png pdf	Figure 2-a: Projection of expected model-independent limits based on 2016 CMS data [10] for ggH production with subsequent ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb $^{-1}$ .
png pdf	Figure 2-b: Projection of expected model-independent limits based on 2016 CMS data [10] for bbH production with subsequent ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, comparing different scenarios for systematic uncertainties for an integrated luminosity of 3000 fb $^{-1}$ .
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 ${{\mathrm {H}} \to {\tau} {\tau}}$ decays, for an integrated luminosity of 3000 fb $^{-1}$ 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 gg $\phi$ and bb $\phi$ ( $m_{\phi} =$ 25 GeV) production cross sections with subsequent ${\phi \to {\tau} {\tau}}$ decays, for an integrated luminosity of 3000 fb $^{-1}$ 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 gg $\phi$ and bb $\phi$ ( $m_{\phi} =$ 400 GeV) production cross sections with subsequent ${\phi \to {\tau} {\tau}}$ decays, for an integrated luminosity of 3000 fb $^{-1}$ 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 gg $\phi$ and bb $\phi$ ( $m_{\phi} =$ 700 GeV) production cross sections with subsequent ${\phi \to {\tau} {\tau}}$ decays, for an integrated luminosity of 3000 fb $^{-1}$ 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 gg $\phi$ and bb $\phi$ ( $m_{\phi} =$ 3200 GeV) production cross sections with subsequent ${\phi \to {\tau} {\tau}}$ decays, for an integrated luminosity of 3000 fb $^{-1}$ and with YR18 systematic uncertainties.
png pdf	Figure 4: Projection of expected MSSM ${{\mathrm {H}} \to {\tau} {\tau}}$ 95% CL upper limits based on 2016 data [10] for different benchmark scenarios, with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ 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 ${{\mathrm {H}} \to {\tau} {\tau}}$ 95% CL upper limits based on 2016 data [10] for the $m_{\mathrm{h}}^{\text{mod+}}$ scenario with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ each. The limits are compared to the CMS result using 2016 data [10].
png pdf	Figure 4-b: Projection of expected MSSM ${{\mathrm {H}} \to {\tau} {\tau}}$ 95% CL upper limits based on 2016 data [10] for the hMSSM scenario with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ each. The limits are compared to the CMS result using 2016 data [10].
png pdf	Figure 4-c: Projection of expected MSSM ${{\mathrm {H}} \to {\tau} {\tau}}$ 95% CL upper limits based on 2016 data [10] for the tau-phobic scenario with YR18 systematic uncertainties. The limit shown for 6000 fb $^{-1}$ 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 fb $^{-1}$ 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

$\tau$ leptons have been shown, based on a data set of proton-proton collisions at

$\sqrt{s} =$ 13 TeV collected in 2016, corresponding to a total integrated luminosity of 35.9 fb

$^{-1}$ . The assumed integrated luminosity for the HL-LHC is 3000 fb

$^{-1}$ . 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

$\tan \beta$ of 36, 26, and 28 for the

${m_{\mathrm{h}}^{\text{mod+}}}$ , 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 $\sqrt{s} =$ 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 $^{\pm} \to \tau^{\pm}\nu_\tau$ decay channel in proton-proton collisions at $\sqrt{s}=$ 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 $\mathrm{b\overline{b}}$ pair in pp collisions at $\sqrt{s} =$ 13 TeV	JHEP 08 (2018) 113	CMS-HIG-16-018 1805.12191
10	CMS Collaboration	Search for additional neutral MSSM Higgs bosons in the $\tau\tau$ final state in proton-proton collisions at $\sqrt{s}=$ 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 $\mathrm{Z}\gamma^{*} \to \tau\tau$ cross section in pp collisions at $\sqrt{s} =$ 13 TeV and validation of $\tau$ 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