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| CMS-SUS-19-003 ; CERN-EP-2019-192 | ||
| Search for top squark pair production in a final state with two tau leptons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 28 October 2019 | ||
| JHEP 02 (2020) 015 | ||
| Abstract: A search for pair production of the supersymmetric partner of the top quark, the top squark, in proton-proton collision events at $ \sqrt{s} = $ 13 TeV is presented in a final state containing hadronically decaying tau leptons and large missing transverse momentum. This final state is highly sensitive to high-${\tan\beta}$ or higgsino-like scenarios in which decays of electroweak gauginos to tau leptons are dominant. The search uses a data set corresponding to an integrated luminosity of 77.2 fb$^{-1}$, which was recorded with the CMS detector during 2016 and 2017. No significant excess is observed with respect to the background prediction. Exclusion limits at 95% confidence level are presented in the top squark and lightest neutralino mass plane within the framework of simplified models, in which top squark masses up to 1100 GeV are excluded for a nearly massless neutralino. | ||
| Links: e-print arXiv:1910.12932 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; HepData record ; CADI line (restricted) ; | ||
| Figures | |
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Figure 1:
Top squark pair production in proton-proton collisions at the LHC, producing pairs of b quarks and taus accompanied by neutrinos and LSPs in the final state. |
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Figure 1-a:
Top squark pair production in proton-proton collisions at the LHC, producing pairs of b quarks and taus accompanied by neutrinos and LSPs in the final state. |
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Figure 1-b:
Top squark pair production in proton-proton collisions at the LHC, producing pairs of b quarks and taus accompanied by neutrinos and LSPs in the final state. |
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Figure 1-c:
Top squark pair production in proton-proton collisions at the LHC, producing pairs of b quarks and taus accompanied by neutrinos and LSPs in the final state. |
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Figure 1-d:
Top squark pair production in proton-proton collisions at the LHC, producing pairs of b quarks and taus accompanied by neutrinos and LSPs in the final state. |
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Figure 2:
Distributions of the search variables ${{p_{\mathrm {T}}} ^\text {miss}}$, ${m_{\mathrm {T2}}}$, and ${H_{\mathrm {T}}}$ after event selection, for data and the predicted background. The histograms for the background processes are stacked, and the distributions for a few representative signal points corresponding to $ x = $ 0.5 and [$ m_{\tilde{\mathrm{t}}_{1}} $, $ m_{\tilde{\chi}^0_1} $] = [300, 100], [500, 350], and [800, 300] GeV are overlaid. The lower panel indicates the ratio of the observed data to the background prediction. The shaded bands indicate the statistical and systematic uncertainties on the background, added in quadrature. |
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Figure 2-a:
Distributions of the search variables ${{p_{\mathrm {T}}} ^\text {miss}}$, ${m_{\mathrm {T2}}}$, and ${H_{\mathrm {T}}}$ after event selection, for data and the predicted background. The histograms for the background processes are stacked, and the distributions for a few representative signal points corresponding to $ x = $ 0.5 and [$ m_{\tilde{\mathrm{t}}_{1}} $, $ m_{\tilde{\chi}^0_1} $] = [300, 100], [500, 350], and [800, 300] GeV are overlaid. The lower panel indicates the ratio of the observed data to the background prediction. The shaded bands indicate the statistical and systematic uncertainties on the background, added in quadrature. |
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Figure 2-b:
Distributions of the search variables ${{p_{\mathrm {T}}} ^\text {miss}}$, ${m_{\mathrm {T2}}}$, and ${H_{\mathrm {T}}}$ after event selection, for data and the predicted background. The histograms for the background processes are stacked, and the distributions for a few representative signal points corresponding to $ x = $ 0.5 and [$ m_{\tilde{\mathrm{t}}_{1}} $, $ m_{\tilde{\chi}^0_1} $] = [300, 100], [500, 350], and [800, 300] GeV are overlaid. The lower panel indicates the ratio of the observed data to the background prediction. The shaded bands indicate the statistical and systematic uncertainties on the background, added in quadrature. |
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Figure 2-c:
Distributions of the search variables ${{p_{\mathrm {T}}} ^\text {miss}}$, ${m_{\mathrm {T2}}}$, and ${H_{\mathrm {T}}}$ after event selection, for data and the predicted background. The histograms for the background processes are stacked, and the distributions for a few representative signal points corresponding to $ x = $ 0.5 and [$ m_{\tilde{\mathrm{t}}_{1}} $, $ m_{\tilde{\chi}^0_1} $] = [300, 100], [500, 350], and [800, 300] GeV are overlaid. The lower panel indicates the ratio of the observed data to the background prediction. The shaded bands indicate the statistical and systematic uncertainties on the background, added in quadrature. |
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Figure 3:
The 15 search regions defined in bins of ${{p_{\mathrm {T}}} ^\text {miss}}$, ${m_{\mathrm {T2}}}$, and ${H_{\mathrm {T}}}$. |
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Figure 4:
The purities (upper row), scale factors (middle row), and $ \text {SF}^{\mathrm{e} \mu} - \text {SF}^{\mu \mu} $ (bottom row) in the different bins (as defined in Fig. 3) of the ${\mathrm{t} \mathrm{\bar{t}}}$ CR for 2016 (left) and 2017 (right) data. The scale factor in bin 15 of the $ \mu\mu $ CR in 2016 is off the visible scale. Note that bins 14 and 15 are merged to provide a single SF for subsequent calculations. |
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Figure 4-a:
The purities (upper row), scale factors (middle row), and $ \text {SF}^{\mathrm{e} \mu} - \text {SF}^{\mu \mu} $ (bottom row) in the different bins (as defined in Fig. 3) of the ${\mathrm{t} \mathrm{\bar{t}}}$ CR for 2016 (left) and 2017 (right) data. The scale factor in bin 15 of the $ \mu\mu $ CR in 2016 is off the visible scale. Note that bins 14 and 15 are merged to provide a single SF for subsequent calculations. |
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Figure 4-b:
The purities (upper row), scale factors (middle row), and $ \text {SF}^{\mathrm{e} \mu} - \text {SF}^{\mu \mu} $ (bottom row) in the different bins (as defined in Fig. 3) of the ${\mathrm{t} \mathrm{\bar{t}}}$ CR for 2016 (left) and 2017 (right) data. The scale factor in bin 15 of the $ \mu\mu $ CR in 2016 is off the visible scale. Note that bins 14 and 15 are merged to provide a single SF for subsequent calculations. |
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Figure 5:
Event yields in the 15 search bins as defined in Fig. 3. The yields for the background processes are stacked, and those for a few representative signal points corresponding to $ x = $ 0.5 and [$ m_{\tilde{\mathrm{t}}_{1}}, m_{\tilde{\chi}^0_1} $] = [300, 100], [500, 350], and [800, 300] GeV are overlaid. The lower panel indicates the ratio of the observed data to the background prediction in each bin. The shaded bands indicate the statistical and systematic uncertainties in the background, added in quadrature. |
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Figure 6:
Exclusion limits at 95% CL for the pair production of top squarks decaying to a ${{\tau _\mathrm {h}}} {\tau _\mathrm {h}}$ final state, displayed in the $ {m_{\tilde{\mathrm{t}}_{1}}}$-$m_{\tilde{\chi}^0_1} $ plane for $ x = $ 0.25 (upper left), 0.5 (upper right) and 0.75 (lower), as described in Eq. (1). The color axis represents the observed limit in the cross section, while the black (red) lines represent the observed (expected) mass limits. The signal cross sections are evaluated using NNLO plus next-to-leading logarithmic (NLL) calculations. The solid lines represent the central values. The dashed red lines indicate the region containing 68% of the distribution of limits expected under the background-only hypothesis. The dashed black lines show the change in the observed limit due to variation of the signal cross sections within their theoretical uncertainties. |
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Figure 6-a:
Exclusion limits at 95% CL for the pair production of top squarks decaying to a ${{\tau _\mathrm {h}}} {\tau _\mathrm {h}}$ final state, displayed in the $ {m_{\tilde{\mathrm{t}}_{1}}}$-$m_{\tilde{\chi}^0_1} $ plane for $ x = $ 0.25 (upper left), 0.5 (upper right) and 0.75 (lower), as described in Eq. (1). The color axis represents the observed limit in the cross section, while the black (red) lines represent the observed (expected) mass limits. The signal cross sections are evaluated using NNLO plus next-to-leading logarithmic (NLL) calculations. The solid lines represent the central values. The dashed red lines indicate the region containing 68% of the distribution of limits expected under the background-only hypothesis. The dashed black lines show the change in the observed limit due to variation of the signal cross sections within their theoretical uncertainties. |
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Figure 6-b:
Exclusion limits at 95% CL for the pair production of top squarks decaying to a ${{\tau _\mathrm {h}}} {\tau _\mathrm {h}}$ final state, displayed in the $ {m_{\tilde{\mathrm{t}}_{1}}}$-$m_{\tilde{\chi}^0_1} $ plane for $ x = $ 0.25 (upper left), 0.5 (upper right) and 0.75 (lower), as described in Eq. (1). The color axis represents the observed limit in the cross section, while the black (red) lines represent the observed (expected) mass limits. The signal cross sections are evaluated using NNLO plus next-to-leading logarithmic (NLL) calculations. The solid lines represent the central values. The dashed red lines indicate the region containing 68% of the distribution of limits expected under the background-only hypothesis. The dashed black lines show the change in the observed limit due to variation of the signal cross sections within their theoretical uncertainties. |
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Figure 6-c:
Exclusion limits at 95% CL for the pair production of top squarks decaying to a ${{\tau _\mathrm {h}}} {\tau _\mathrm {h}}$ final state, displayed in the $ {m_{\tilde{\mathrm{t}}_{1}}}$-$m_{\tilde{\chi}^0_1} $ plane for $ x = $ 0.25 (upper left), 0.5 (upper right) and 0.75 (lower), as described in Eq. (1). The color axis represents the observed limit in the cross section, while the black (red) lines represent the observed (expected) mass limits. The signal cross sections are evaluated using NNLO plus next-to-leading logarithmic (NLL) calculations. The solid lines represent the central values. The dashed red lines indicate the region containing 68% of the distribution of limits expected under the background-only hypothesis. The dashed black lines show the change in the observed limit due to variation of the signal cross sections within their theoretical uncertainties. |
| Tables | |
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Table 1:
Relative systematic uncertainties from different sources in signal and background yields in the 2016 and 2017 analyses combined. These values are the weighted (by the yields in the respective bins) averages of the relative uncertainties in the different search regions. For the asymmetric uncertainties, the upper (lower) entry is the uncertainty due to the upward (downward) variation, which can be in the same direction as a result of taking the weighted average. The numbers in square brackets in the heading indicate the top squark and LSP masses in GeV, respectively. |
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Table 2:
Event yields along with statistical and systematic uncertainties in the 2016 and 2017 analyses combined, for different background sources and the total background in the 15 search bins, as defined in Fig. 3. The uncertainties that are smaller than 0.05 are listed as 0.0. The number of events observed in data is also shown. The notation used is $ \text {yield} ^{+\text {stat} +\text {syst}}_{-\text {stat}-\text {syst}} $. |
| Summary |
|
The signature of top squark pair production in final states with two tau leptons has been explored in data collected with the CMS detector during 2016 and 2017, corresponding to integrated luminosities of 35.9 and 41.3 fb$^{-1}$, respectively. The search was performed in the final state containing an oppositely charged hadronic tau lepton pair, at least one jet identified as likely to originate from the fragmentation of a b quark, and missing transverse momentum. The dominant standard model backgrounds were found to originate from top quark pair production and processes where jets were misidentified as hadronic tau lepton decays. Control samples in data were used to estimate these backgrounds, while other backgrounds were estimated using simulation. No significant excess was observed, and exclusion limits on the top squark mass in terms of the mass of the lightest neutralino were set at 95% confidence level within the framework of simplified models where the top squark decays via a chargino to final states including tau leptons. In such models, top squark masses are excluded up to 1100 GeV for an almost massless neutralino, and LSP masses up to 450 GeV are excluded for a top squark mass of 900 GeV. These results probe a region of the supersymmetric parameter space corresponding to high-${\tan\beta}$ and higgsino-like scenarios. |
| References | ||||
| 1 | P. Ramond | Dual theory for free fermions | PRD 3 (1971) 2415 | |
| 2 | Yu. A. Golfand and E. P. Likhtman | Extension of the algebra of Poincar$ \'e $ group generators and violation of p invariance | JEPTL 13 (1971) 323.[Pisma Zh. Eksp. Teor. Fiz. 13 (1971) 452] | |
| 3 | A. Neveu and J. H. Schwarz | Factorizable dual model of pions | NPB 31 (1971) 86 | |
| 4 | J. Wess and B. Zumino | A Lagrangian model invariant under supergauge transformations | PLB 49 (1974) 52 | |
| 5 | P. Fayet | Supergauge invariant extension of the Higgs mechanism and a model for the electron and its neutrino | NPB 90 (1975) 104 | |
| 6 | G. 't Hooft | Naturalness, chiral symmetry, and spontaneous chiral symmetry breaking | NATO Sci. Ser. B 59 (1980) 135 | |
| 7 | R. K. Kaul and P. Majumdar | Cancellation of quadratically divergent mass corrections in globally supersymmetric spontaneously broken gauge theories | NPB 199 (1982) 36 | |
| 8 | H. P. Nilles | Supersymmetry, supergravity and particle physics | PR 110 (1984) 1 | |
| 9 | S. P. Martin | A supersymmetry primer | hep-ph/9709356 | |
| 10 | G. R. Farrar and P. Fayet | Phenomenology of the production, decay, and detection of new hadronic states associated with supersymmetry | PLB 76 (1978) 575 | |
| 11 | H. Baer et al. | Collider phenomenology for supersymmetry with large tan$ \beta $ | PRL 79 (1997) 986 | hep-ph/9704457 |
| 12 | M. Guchait and D. P. Roy | Using $ \tau $ polarization as a distinctive SUGRA signature at LHC | PLB 541 (2002) 356 | hep-ph/0205015 |
| 13 | J. Alwall, P. Schuster, and N. Toro | Simplified models for a first characterization of new physics at the LHC | PRD 79 (2009) 075020 | 0810.3921 |
| 14 | LHC New Physics Working Group Collaboration | Simplified models for LHC new physics searches | JPG 39 (2012) 105005 | 1105.2838 |
| 15 | CMS Collaboration | Search for top squark pair production in pp collisions at $ \sqrt{s}= $ 13 TeV using single lepton events | JHEP 10 (2017) 019 | CMS-SUS-16-051 1706.04402 |
| 16 | CMS Collaboration | Search for top squarks and dark matter particles in opposite-charge dilepton final states at $ \sqrt{s}= $ 13 TeV | PRD 97 (2018) 032009 | CMS-SUS-17-001 1711.00752 |
| 17 | CMS Collaboration | Search for top-squark pair production in the single-lepton final state in pp collisions at $ \sqrt{s} = $ 8 TeV | EPJC 73 (2013) 2677 | CMS-SUS-13-011 1308.1586 |
| 18 | CMS Collaboration | Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at $ \sqrt{s}= $ 8 TeV | JHEP 07 (2016) 027 | CMS-SUS-14-015 1602.03169 |
| 19 | CMS Collaboration | Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at $ \sqrt{s} = $ 8 TeV using the $ \alpha_T $ variable | PLB 767 (2017) 403 | CMS-SUS-14-006 1605.08993 |
| 20 | CMS Collaboration | Searches for pair production of third-generation squarks in $ \sqrt{s}= $ 13 TeV pp collisions | EPJC 77 (2017) 327 | CMS-SUS-16-008 1612.03877 |
| 21 | CMS Collaboration | Search for direct production of supersymmetric partners of the top quark in the all-jets final state in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | JHEP 10 (2017) 005 | CMS-SUS-16-049 1707.03316 |
| 22 | CMS Collaboration | Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks | PRD 97 (2018) 012007 | CMS-SUS-16-050 1710.11188 |
| 23 | ATLAS Collaboration | Search for direct top squark pair production in final states with two leptons in $ \sqrt{s} = $ 13 TeV pp collisions with the ATLAS detector | EPJC 77 (2017) 898 | 1708.03247 |
| 24 | ATLAS Collaboration | ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider | EPJC 75 (2015) 510 | 1506.08616 |
| 25 | ATLAS Collaboration | Search for top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in $ \sqrt s = $ 8 TeV pp collisions with the ATLAS detector | JHEP 11 (2014) 118 | 1407.0583 |
| 26 | ATLAS Collaboration | Search for direct top-squark pair production in final states with two leptons in pp collisions at $ \sqrt{s} = $ 8TeV with the ATLAS detector | JHEP 06 (2014) 124 | 1403.4853 |
| 27 | ATLAS Collaboration | Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in $ \sqrt{s}= $ 13 TeV pp collisions with the ATLAS detector | PRD 94 (2016) 052009 | 1606.03903 |
| 28 | ATLAS Collaboration | Search for top squarks decaying to tau sleptons in pp collisions at $ \sqrt{s}= $ 13 TeV with the ATLAS detector | PRD 98 (2018) 032008 | 1803.10178 |
| 29 | CMS Collaboration | The CMS experiment at the CERN LHC | JINST 3 (2008) S08004 | CMS-00-001 |
| 30 | CMS Collaboration | The CMS trigger system | JINST 12 (2017) P01020 | CMS-TRG-12-001 1609.02366 |
| 31 | C. Oleari | The POWHEG BOX | Nuclear Physics B - Proceedings Supplements 205 (2010) 36, . Loops and Legs in Quantum Field Theory | |
| 32 | P. Nason | A new method for combining NLO QCD with shower Monte Carlo algorithms | JHEP 11 (2004) 040 | hep-ph/0409146 |
| 33 | S. Frixione, P. Nason, and C. Oleari | Matching NLO QCD computations with parton shower simulations: the POWHEG method | JHEP 11 (2007) 070 | 0709.2092 |
| 34 | S. Alioli, P. Nason, C. Oleari, and E. Re | A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX | JHEP 06 (2010) 043 | 1002.2581 |
| 35 | S. Frixione, P. Nason, and G. Ridolfi | A positive-weight next-to-leading-order Monte Carlo for heavy flavour hadroproduction | JHEP 09 (2007) 126 | 0707.3088 |
| 36 | S. Alioli, P. Nason, C. Oleari, and E. Re | NLO single-top production matched with shower in POWHEG: s- and t-channel contributions | JHEP 09 (2009) 111 | 0907.4076 |
| 37 | J. Alwall et al. | The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations | JHEP 07 (2014) 079 | 1405.0301 |
| 38 | T. Sjostrand et al. | An Introduction to PYTHIA 8.2 | CPC 191 (2015) 159 | 1410.3012 |
| 39 | CMS Collaboration | Investigations of the impact of the parton shower tuning in Pythia 8 in the modelling of $ \mathrm{t\overline{t}} $ at $ \sqrt{s}= $ 8 and 13 TeV | CMS-PAS-TOP-16-021 | CMS-PAS-TOP-16-021 |
| 40 | CMS Collaboration | Event generator tunes obtained from underlying event and multiparton scattering measurements | EPJC 76 (2016) 155 | CMS-GEN-14-001 1512.00815 |
| 41 | CMS Collaboration | Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements | CMS-GEN-17-001 1903.12179 |
|
| 42 | GEANT4 Collaboration | GEANT4--a simulation toolkit | NIMA 506 (2003) 250 | |
| 43 | W. Beenakker, R. Hopker, M. Spira, and P. M. Zerwas | Squark and gluino production at hadron colliders | NPB 492 (1997) 51 | hep-ph/9610490 |
| 44 | A. Kulesza and L. Motyka | Threshold resummation for squark-antisquark and gluino-pair production at the LHC | PRL 102 (2009) 111802 | 0807.2405 |
| 45 | A. Kulesza and L. Motyka | Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC | PRD 80 (2009) 095004 | 0905.4749 |
| 46 | W. Beenakker et al. | Soft-gluon resummation for squark and gluino hadroproduction | JHEP 12 (2009) 041 | 0909.4418 |
| 47 | W. Beenakker et al. | Squark and gluino hadroproduction | Int. J. Mod. Phys. A 26 (2011) 2637 | 1105.1110 |
| 48 | A. Giammanco | The fast simulation of the CMS experiment | J. Phys. Conf. Ser. 513 (2014) 022012 | |
| 49 | CMS Collaboration | Particle-flow reconstruction and global event description with the CMS detector | JINST 12 (2017) P10003 | CMS-PRF-14-001 1706.04965 |
| 50 | M. Cacciari, G. P. Salam, and G. Soyez | The anti-$ {k_{\mathrm{T}}} $ jet clustering algorithm | JHEP 04 (2008) 063 | 0802.1189 |
| 51 | M. Cacciari, G. P. Salam, and G. Soyez | FastJet user manual | EPJC 72 (2012) 1896 | 1111.6097 |
| 52 | CMS Collaboration | Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV | JINST 12 (2017) P02014 | CMS-JME-13-004 1607.03663 |
| 53 | CMS Collaboration | Jet algorithms performance in 13 TeV data | CMS-PAS-JME-16-003 | CMS-PAS-JME-16-003 |
| 54 | CMS Collaboration | Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV | JINST 13 (2018) P05011 | CMS-BTV-16-002 1712.07158 |
| 55 | CMS Collaboration | Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at $ \sqrt{s} = $ 8 TeV | JINST 10 (2015) P06005 | CMS-EGM-13-001 1502.02701 |
| 56 | CMS Collaboration | Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JINST 13 (2018) P06015 | CMS-MUO-16-001 1804.04528 |
| 57 | CMS Collaboration | Performance of missing transverse momentum reconstruction in proton-proton collisions at $ \sqrt{s} = $ 13 TeV using the CMS detector | JINST 14 (2019) P07004 | CMS-JME-17-001 1903.06078 |
| 58 | CMS Collaboration | Performance of reconstruction and identification of $ {\tau} $ leptons decaying to hadrons and v$ _{\tau} $ in pp collisions at $ \sqrt{s}= $ 13 TeV | JINST 13 (2018) P10005 | CMS-TAU-16-003 1809.02816 |
| 59 | C. G. Lester and D. J. Summers | Measuring masses of semiinvisibly decaying particles pair produced at hadron colliders | PLB 463 (1999) 99 | hep-ph/9906349 |
| 60 | A. Barr, C. Lester, and P. Stephens | $ {m_{\mathrm{T}2}}: $ The truth behind the glamour | JPG 29 (2003) 2343 | hep-ph/0304226 |
| 61 | A. J. Barr and C. Gwenlan | The race for supersymmetry: Using $ {m_{\mathrm{T}2}} $ for discovery | PRD 80 (2009) 074007 | 0907.2713 |
| 62 | CMS Collaboration | Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two $ \tau $ leptons and two jets in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JHEP 03 (2019) 170 | CMS-EXO-17-016 1811.00806 |
| 63 | CMS Collaboration | Search for supersymmetry in events with a $ \tau $ lepton pair and missing transverse momentum in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | JHEP 11 (2018) 151 | CMS-SUS-17-003 1807.02048 |
| 64 | CMS Collaboration | Measurement of the inelastic proton-proton cross section at $ \sqrt{s}= $ 13 TeV | JHEP 07 (2018) 161 | CMS-FSQ-15-005 1802.02613 |
| 65 | A. Kalogeropoulos and J. Alwall | The SysCalc code: A tool to derive theoretical systematic uncertainties | 1801.08401 | |
| 66 | CMS Collaboration | CMS luminosity measurements for the 2016 data taking period | CMS-PAS-LUM-17-001 | CMS-PAS-LUM-17-001 |
| 67 | CMS Collaboration | CMS luminosity measurement for the 2017 data-taking period at $ \sqrt{s} = $ 13 TeV | CMS-PAS-LUM-17-004 | CMS-PAS-LUM-17-004 |
| 68 | CMS Collaboration | Measurement of the differential Drell-Yan cross section in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | CMS-SMP-17-001 1812.10529 |
|
| 69 | CMS Collaboration | Measurements of $ \mathrm{t\overline{t}} $ differential cross sections in proton-proton collisions at $ \sqrt{s}= $ 13 TeV using events containing two leptons | JHEP 02 (2019) 149 | CMS-TOP-17-014 1811.06625 |
| 70 | ATLAS Collaboration | Measurement of the $ W^+W^- $ production cross section in pp collisions at a centre-of-mass energy of $ \sqrt{s} = $ 13 TeV with the ATLAS experiment | PLB 773 (2017) 354 | 1702.04519 |
| 71 | CMS Collaboration | Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | Submitted to JHEP | CMS-TOP-18-009 1907.11270 |
| 72 | CMS Collaboration | Measurement of differential cross sections and charge ratios for $ t $-channel single top quark production in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | Submitted to EPJC (2019) | CMS-TOP-17-023 1907.08330 |
| 73 | CMS Collaboration | Measurements of the pp $ \to $ WZ inclusive and differential production cross section and constraints on charged anomalous triple gauge couplings at $ \sqrt{s} = $ 13 TeV | JHEP 04 (2019) 122 | CMS-SMP-18-002 1901.03428 |
| 74 | CMS Collaboration | Measurement of the differential cross sections for the associated production of a $ W $ boson and jets in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | PRD 96 (2017) 072005 | CMS-SMP-16-005 1707.05979 |
| 75 | The ATLAS Collaboration, The CMS Collaboration, The LHC Higgs Combination Group | Procedure for the LHC Higgs boson search combination in summer 2011 | CMS-NOTE-2011-005 | |
| 76 | T. Junk | Confidence level computation for combining searches with small statistics | Nucl. Instrum. Meth A 434 (1999) 435 | |
| 77 | A. L. Read | Presentation of search results: the CLs technique | JPG 28 (2002) 2693 | |
| 78 | G. Cowan, K. Cranmer, E. Gross, and O. Vitells | Asymptotic formulae for likelihood-based tests of new physics | EPJC 71 (2011) 1554 | 1007.1727 |
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