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| CMS-PAS-B2G-20-004 | ||
| Search for resonant Higgs boson pair production in four b quark final state using large-area jets in proton-proton collisions at $\sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| July 2021 | ||
| Abstract: A search is presented for pair production of the standard model Higgs boson using data from proton-proton collisions at a centre-of-mass energy of 13 TeV, collected by the CMS experiment at the CERN LHC in 2016-2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The final state consists of two b quark-antiquark pairs. The search is conducted in the region of phase space where at least one of the pairs is highly Lorentz-boosted and is reconstructed as a single large-area jet. The other pair may be either similarly boosted or resolved, the latter reconstructed using two b-tagged jets. The data was found to be consistent with the measured standard model processes. Limits in the range 9.74-0.29 fb and 4.94-0.19 fb were set on the product of the cross sections and the branching fractions of the spin-0 radion and the spin-2 bulk graviton with a mass of 1-3 TeV, respectively, in the context of warped extradimensional models. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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| Figures | |
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Figure 1:
Slices of two-dimensional distributions of observed events and the post-fit templates in the LL pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. For this and following figures, the value of $\sigma $ in the lower panel is $\sigma = \sqrt {\sigma _{bkg}^2 + \sigma _{data}^2}$. |
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Figure 1-a:
Slices of two-dimensional distributions of observed events and the post-fit templates in the LL pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. For this and following figures, the value of $\sigma $ in the lower panel is $\sigma = \sqrt {\sigma _{bkg}^2 + \sigma _{data}^2}$. |
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Figure 1-b:
Slices of two-dimensional distributions of observed events and the post-fit templates in the LL pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. For this and following figures, the value of $\sigma $ in the lower panel is $\sigma = \sqrt {\sigma _{bkg}^2 + \sigma _{data}^2}$. |
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Figure 2:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
png pdf |
Figure 2-a:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
png pdf |
Figure 2-b:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
png pdf |
Figure 3:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
png pdf |
Figure 3-a:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
png pdf |
Figure 3-b:
Slices of two-dimensional distributions of observed events and the post-fit templates in the TT pass region, projected onto the $ {m_{\text {J}}} $ (left) and $ {m_\text {red}} $ (right) axes, including expected radion signal at 1500 GeV. |
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Figure 4:
Upper limits at 95% confidence level on $\sigma ({\mathrm{p}} {\mathrm{p}} \to \mathrm{X}) \mathcal {B}(\mathrm{X} \to \mathrm{b} {}\mathrm{\bar{b}} \mathrm{b} {}\mathrm{\bar{b}})$ for the narrow spin-0 radion (left) and the spin-2 bulk graviton (right) models. The predicted theoretical cross sections for the narrow radion and bulk graviton are also shown. |
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Figure 4-a:
Upper limits at 95% confidence level on $\sigma ({\mathrm{p}} {\mathrm{p}} \to \mathrm{X}) \mathcal {B}(\mathrm{X} \to \mathrm{b} {}\mathrm{\bar{b}} \mathrm{b} {}\mathrm{\bar{b}})$ for the narrow spin-0 radion (left) and the spin-2 bulk graviton (right) models. The predicted theoretical cross sections for the narrow radion and bulk graviton are also shown. |
png pdf |
Figure 4-b:
Upper limits at 95% confidence level on $\sigma ({\mathrm{p}} {\mathrm{p}} \to \mathrm{X}) \mathcal {B}(\mathrm{X} \to \mathrm{b} {}\mathrm{\bar{b}} \mathrm{b} {}\mathrm{\bar{b}})$ for the narrow spin-0 radion (left) and the spin-2 bulk graviton (right) models. The predicted theoretical cross sections for the narrow radion and bulk graviton are also shown. |
| Tables | |
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Table 1:
Event selection for the fully-merged topology. |
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Table 2:
Event selection for the semi-resolved topology. |
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Table 3:
Summary of the ranges of systematic uncertainties in the signal and background yields, for the combined fit of all ten regions for the radion resonance at 1500 GeV. |
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Table 4:
Radion observed 95% CL exclusion limits. |
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Table 5:
Graviton observed 95% CL exclusion limits. |
| Summary |
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A search is presented for the pair production of standard model Higgs bosons (HH), both decaying to a bottom quark-antiquark pair ($\mathrm{b\bar{b}}$), using data from proton-proton collisions at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb$^{-1}$. The search is conducted in the region of phase space where at least one of the Higgs bosons has a large Lorentz boost, so that the $\mathrm{H}\to\mathrm{b\bar{b}}$ decay products are collimated to form a single H jet. The search combines events with one H jet plus two b jets with events having two H jets, thus adding sensitivity to the previous analysis [32]. The results of the search are compared with predictions for the resonant production of a narrow Kaluza-Klein bulk graviton and a narrow radion in warped extradimensional models. The search is also sensitive to several beyond standard model non-resonant HH production scenarios. Such cases may arise either when an off-shell massive resonance produced in proton-proton collisions decays to HH, or through beyond standard model effects in the Higgs boson coupling parameters. The results are interpreted in terms of upper limits on the product of the cross section for the respective signal processes and the branching fraction to $\mathrm{H}\mathrm{H} \to \mathrm{b\bar{b}}\mathrm{b\bar{b}}$, at 95% confidence level. The upper limits range from 4.94 to 0.19 fb} for the bulk graviton and from 9.74 to 0.29 fb for the radion for the mass range 1-3 TeV. |
| 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) 01 | 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 | D. de Florian et al. | Handbook of LHC Higgs cross sections: 4. deciphering the nature of the Higgs sector | CERN-2017-002-M, CERN | 1610.07922 |
| 5 | D. de Florian and J. Mazzitelli | Higgs boson pair production at next-to-next-to-leading order in QCD | PRL 111 (2013) 201801 | 1309.6594 |
| 6 | J. Baglio et al. | The measurement of the Higgs self-coupling at the LHC: theoretical status | JHEP 04 (2013) 151 | 1212.5581 |
| 7 | L. Randall and R. Sundrum | A large mass hierarchy from a small extra dimension | PRL 83 (1999) 3370 | hep-ph/9905221 |
| 8 | R. Grober and M. Muhlleitner | Composite Higgs boson pair production at the LHC | JHEP 06 (2011) 020 | 1012.1562 |
| 9 | W. D. Goldberger and M. B. Wise | Modulus stabilization with bulk fields | PRL 83 (1999) 4922 | hep-ph/9907447 |
| 10 | O. DeWolfe, D. Z. Freedman, S. S. Gubser, and A. Karch | Modeling the fifth dimension with scalars and gravity | PRD 62 (2000) 046008 | hep-th/9909134 |
| 11 | C. Csaki, M. Graesser, L. Randall, and J. Terning | Cosmology of brane models with radion stabilization | PRD 62 (2000) 045015 | hep-ph/9911406 |
| 12 | H. Davoudiasl, J. L. Hewett, and T. G. Rizzo | Phenomenology of the Randall-Sundrum gauge hierarchy model | PRL 84 (2000) 2080 | hep-ph/9909255 |
| 13 | C. Csaki, M. L. Graesser, and G. D. Kribs | Radion dynamics and electroweak physics | PRD 63 (2001) 065002 | hep-th/0008151 |
| 14 | K. Agashe, H. Davoudiasl, G. Perez, and A. Soni | Warped gravitons at the LHC and beyond | PRD 76 (2007) 036006 | hep-ph/0701186 |
| 15 | G. F. Giudice, R. Rattazzi, and J. D. Wells | Graviscalars from higher dimensional metrics and curvature Higgs mixing | NPB 595 (2001) 250 | hep-ph/0002178 |
| 16 | ATLAS Collaboration | Search for Higgs boson pair production in the $ \gamma\gamma \mathrm{b\bar{b}} $ final state using pp collision data at $ \sqrt{s}= $ 8 TeV from the ATLAS detector | PRL 114 (2015) 081802 | 1406.5053 |
| 17 | ATLAS Collaboration | Search for Higgs boson pair production in the $ \mathrm{b\bar{b}}\mathrm{b\bar{b}} $ final state from pp collisions at $ \sqrt{s} = $ 8 TeV with the ATLAS detector | EPJC 75 (2015) 412 | 1506.00285 |
| 18 | ATLAS Collaboration | Searches for Higgs boson pair production in the $ \mathrm{H}\mathrm{H}\to \mathrm{b\bar{b}}\tau\tau $, $ \gamma\gamma \mathrm{W}\mathrm{W}^* $, $ \gamma\gamma\mathrm{b\bar{b}} $, $ \mathrm{b\bar{b}}\mathrm{b\bar{b}} $ channels with the ATLAS detector | PRD 92 (2015) 092004 | 1509.04670 |
| 19 | ATLAS Collaboration | Search for pair production of Higgs bosons in the $ \mathrm{b\bar{b}}\mathrm{b\bar{b}} $ final state using proton--proton collisions at $ \sqrt{s} = $ 13 TeV with the ATLAS detector | PRD 94 (2016) 052002 | 1606.04782 |
| 20 | ATLAS Collaboration | Search for pair production of Higgs bosons in the $ b\bar{b}b\bar{b} $ final state using proton-proton collisions at $ \sqrt{s} = $ 13 TeV with the ATLAS detector | JHEP 01 (2019) 030 | 1804.06174 |
| 21 | ATLAS Collaboration | Search for Resonant and Nonresonant Higgs Boson Pair Production in the $ {\mathrm{b\bar{b}}\tau^+\tau^-} $ Decay Channel in $ {\mathrm{p}}{\mathrm{p}} $ Collisions at $ \sqrt{s} = $ 13 TeV with the ATLAS Detector | PRL 121 (2018) 191801 | 1808.00336 |
| 22 | ATLAS Collaboration | Search for Higgs boson pair production in the $ \gamma\gamma \mathrm{b\bar{b}} $ final state with 13 TeV $ {\mathrm{p}}{\mathrm{p}} $ collision data collected by the ATLAS experiment | JHEP 11 (2018) 040 | 1807.04873 |
| 23 | CMS Collaboration | Searches for heavy Higgs bosons in two-Higgs-doublet models and for t $ \rightarrow $ ch decay using multilepton and diphoton final states in pp collisions at 8 TeV | PRD 90 (2014) 112013 | CMS-HIG-13-025 1410.2751 |
| 24 | CMS Collaboration | Search for Higgs boson pair production in the $ \mathrm{b\bar{b}}\tau\tau $ final state in proton-proton collisions at $ \sqrt{s}= $ 8 TeV | PRD 96 (2017) 072004 | CMS-HIG-15-013 1707.00350 |
| 25 | CMS Collaboration | Search for resonant pair production of Higgs bosons decaying to two bottom quark-antiquark pairs in proton-proton collisions at 8 TeV | PLB 749 (2015) 560 | CMS-HIG-14-013 1503.04114 |
| 26 | CMS Collaboration | Searches for a heavy scalar boson H decaying to a pair of 125 GeV Higgs bosons hh or for a heavy pseudoscalar boson A decaying to Zh, in the final states with $ \text{h} \to \tau \tau $ | PLB 755 (2016) 217 | CMS-HIG-14-034 1510.01181 |
| 27 | CMS Collaboration | Search for two Higgs bosons in final states containing two photons and two bottom quarks in proton-proton collisions at 8 TeV | PRD 94 (2016) 052012 | CMS-HIG-13-032 1603.06896 |
| 28 | CMS Collaboration | Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks | EPJC 76 (2016) 371 | CMS-EXO-12-053 1602.08762 |
| 29 | CMS Collaboration | Search for Higgs boson pair production in events with two bottom quarks and two tau leptons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | PLB 778 (2018) 101 | CMS-HIG-17-002 1707.02909 |
| 30 | CMS Collaboration | Search for resonant and nonresonant Higgs boson pair production in the $ \mathrm{b}\overline{\mathrm{b}}\mathit{\ell}\nu\mathit{\ell}\nu $ final state in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | JHEP 01 (2018) 054 | CMS-HIG-17-006 1708.04188 |
| 31 | CMS Collaboration | Search for Higgs boson pair production in the $ \gamma\gamma\mathrm{b\bar{b}} $ final state in $ {\mathrm{p}}{\mathrm{p}} $ collisions at $ \sqrt{s} = $ 13 TeV | PLB 788 (2019) 7 | CMS-HIG-17-008 1806.00408 |
| 32 | CMS Collaboration | Search for a massive resonance decaying to a pair of Higgs bosons in the four b quark final state in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | PLB 781 (2018) 244 | 1710.04960 |
| 33 | CMS Collaboration | Search for resonant pair production of Higgs bosons decaying to bottom quark-antiquark pairs in proton-proton collisions at 13 TeV | JHEP 08 (2018) 152 | CMS-HIG-17-009 1806.03548 |
| 34 | M. Gouzevitch et al. | Scale-invariant resonance tagging in multijet events and new physics in Higgs pair production | JHEP 07 (2013) 148 | 1303.6636 |
| 35 | CMS Collaboration | Search for production of Higgs boson pairs in the four b quark final state using large-area jets in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | JHEP 01 (2019) 040 | CMS-B2G-17-019 1808.01473 |
| 36 | CMS Collaboration | The CMS experiment at the CERN LHC | JINST 3 (2008) S08004 | CMS-00-001 |
| 37 | CMS Collaboration | The CMS trigger system | JINST 12 (2017) P01020 | CMS-TRG-12-001 1609.02366 |
| 38 | CMS Trigger, Data Acquisition Group Collaboration | The CMS high level trigger | EPJC 46 (2006) 605 | hep-ex/0512077 |
| 39 | CMS Collaboration | Particle-flow reconstruction and global event description with the cms detector | JINST 12 (2017) P10003 | CMS-PRF-14-001 1706.04965 |
| 40 | M. Cacciari, G. P. Salam, and G. Soyez | The anti-$ {k_{\mathrm{T}}} $ jet clustering algorithm | JHEP 04 (2008) 063 | 0802.1189 |
| 41 | M. Cacciari, G. P. Salam, and G. Soyez | FastJet user manual | EPJC 72 (2012) 1896 | 1111.6097 |
| 42 | 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 |
| 43 | 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 |
| 44 | 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 |
| 45 | NNPDF Collaboration | Parton distributions for the LHC Run II | JHEP 04 (2015) 040 | 1410.8849 |
| 46 | L. A. Harland-Lang, A. D. Martin, P. Motylinski, and R. S. Thorne | Parton distributions in the LHC era: MMHT 2014 PDFs | EPJC 75 (2015) 204 | 1412.3989 |
| 47 | A. Buckley et al. | LHAPDF6: parton density access in the LHC precision era | EPJC 75 (2015) 132 | 1412.7420 |
| 48 | S. Carrazza, J. I. Latorre, J. Rojo, and G. Watt | A compression algorithm for the combination of PDF sets | EPJC 75 (2015) 474 | 1504.06469 |
| 49 | J. Butterworth et al. | PDF4LHC recommendations for LHC Run II | JPG 43 (2016) 023001 | 1510.03865 |
| 50 | T. Sjostrand et al. | An Introduction to PYTHIA 8.2 | CPC 191 (2015) 159 | 1410.3012 |
| 51 | S. Frixione, G. Ridolfi, and P. Nason | A positive-weight next-to-leading-order Monte Carlo for heavy flavour hadroproduction | JHEP 09 (2007) 126 | 0707.3088 |
| 52 | S. Frixione, P. Nason, and C. Oleari | Matching NLO QCD computations with parton shower simulations: the POWHEG method | JHEP 11 (2007) 070 | 0709.2092 |
| 53 | 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 |
| 54 | P. Skands, S. Carrazza, and J. Rojo | Tuning Pythia 8.1: the Monash 2013 tune | EPJC 74 (2014) 3024 | 1404.5630 |
| 55 | CMS Collaboration | Measurement of the top quark mass with lepton+jets final states using $ {\mathrm{p}}{\mathrm{p}} $ collisions at $ \sqrt{s} = $ 13 TeV | EPJC 78 (2018) 891 | CMS-TOP-17-007 1805.01428 |
| 56 | M. Czakon and A. Mitov | Top++: A program for the calculation of the top-pair cross-section at hadron colliders | CPC 185 (2014) 2930 | 1112.5675 |
| 57 | GEANT4 Collaboration | GEANT4---a simulation toolkit | NIMA 506 (2003) 250 | |
| 58 | J. Allison et al. | Geant4 developments and applications | IEEE Trans. Nucl. Sci. 53 (2006) 270 | |
| 59 | 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 |
| 60 | D. Krohn, J. Thaler, and L.-T. Wang | Jet trimming | JHEP 02 (2010) 084 | 0912.1342 |
| 61 | M. Dasgupta, A. Fregoso, S. Marzani, and G. P. Salam | Towards an understanding of jet substructure | JHEP 09 (2013) 029 | 1307.0007 |
| 62 | A. J. Larkoski, S. Marzani, G. Soyez, and J. Thaler | Soft drop | JHEP 05 (2014) 146 | 1402.2657 |
| 63 | ATLAS and CMS Collaborations | Combined measurement of the Higgs boson mass in $ pp $ collisions at $ \sqrt{s}= $ 7 and 8 tev with the ATLAS and CMS experiments | PRL 114 (2015) 191803 | 1503.07589 |
| 64 | CMS Collaboration | Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at $ \sqrt{s}= $ 13 TeV | JHEP 11 (2017) 047 | CMS-HIG-16-041 1706.09936 |
| 65 | K. S. Cranmer | Kernel estimation in high-energy physics | CPC 136 (2001) 198--207 | hep-ex/0011057 |
| 66 | CMS Collaboration | Jet algorithms performance in 13 TeV data | CMS-PAS-JME-16-003 | CMS-PAS-JME-16-003 |
| 67 | CMS Collaboration | Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV | JINST 13 (2017) P05011 | CMS-BTV-16-002 1712.07158 |
| 68 | R. Barlow and C. Beeston | Fitting using finite Monte Carlo samples | CPC 77 (1993) 219 | |
| 69 | J. S. Conway | Incorporating nuisance parameters in likelihoods for multisource spectra | in Proceedings, PHYSTAT 2011 Workshop on Statistical Issues Related to Discovery Claims in Search Experiments and Unfolding, CERN 2011 | 1103.0354 |
| 70 | A. L. Fitzpatrick, J. Kaplan, L. Randall, and L.-T. Wang | Searching for the Kaluza-Klein graviton in bulk RS models | JHEP 09 (2007) 013 | hep-ph/0701150 |
| 71 | A. Oliveira | Gravity particles from warped extra dimensions, predictions for LHC | 1404.0102 | |
| 72 | ATLAS and CMS Collaborations, The LHC Higgs Combination Group | Procedure for the LHC Higgs boson search combination in Summer 2011 | CMS-NOTE-2011-005 | |
| 73 | G. Cowan, K. Cranmer, E. Gross, and O. Vitells | Asymptotic formulae for likelihood-based tests of new physics | EPJC 71 (2011) 1554 | 1007.1727 |
| 74 | A. L. Read | Presentation of search results: The CL$ _\text{s} $ technique | JPG 28 (2002) 2693 | |
| 75 | T. Junk | Confidence level computation for combining searches with small statistics | NIMA 434 (1999) 435 | hep-ex/9902006 |
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