Skip to main content
SpringerLink
Log in

Search for the EWK Production of Compressed SUSY with Soft Leptons

  • Chapter
  • First Online:
Electroweak Physics at the Large Hadron Collider with the ATLAS Detector

Part of the book series: Springer Theses ((Springer Theses))

  • 134 Accesses

Abstract

The previous chapters discuss the production of \(\tilde{\chi }_1^{\pm }\tilde{\chi }_2^{0}\) decaying via W and Z bosons to two or three leptons and missing energy. The assumption is that \(\tilde{\chi }_1^{\pm }\) and \(\tilde{\chi }_2^{0}\) were mass degenerate winos and the LSP, \(\tilde{\chi }_1^{0}\), is a bino. This chapter will also present a search of \(\tilde{\chi }_1^{\pm }\tilde{\chi }_2^{0}\) decaying via W and Z bosons to two leptons and missing energy. In this case, the assumption is that all SUSY particles are higgsinos, and the mass of the chargino, \(m(\tilde{\chi }_1^{\pm })\), is in between the mass of the two neutralinos. The production of higgsino particles result a compressed spectrum, as shown in Sect. 6.3.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 109.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Notes

  1. 1.

    The other way one could constrain \(\xi \) is by assuming the taus recoil against jets as: \(-\mathbf {p}_\mathrm {T}^\text {jet} = (1+\xi _1) \mathbf {p}_\mathrm {T}^{\ell _1} +(1+\xi _2) \mathbf {p}_\mathrm {T}^{\ell _2}\)  [24, 46].

References

  1. Muon g-2 Collaboration, Bennett GW, et al (2006) Final report of the Muon E821 anomalous magnetic moment measurement at BNL. Phys Rev D 73:072003. https://doi.org/10.1103/PhysRevD.73.072003, arXiv:hep-ex/0602035

  2. Hagiwara K, Liao R, Martin AD, Nomura D, Teubner T (2011) \((g-2)_\mu \) and \(\alpha (M_Z^2)\) re-evaluated using new precise data. J Phys G 38:085003. https://doi.org/10.1088/0954-3899/38/8/085003, arXiv:1105.3149 [hep-ph]

  3. Endo M, Hamaguchi K, Iwamoto S, Yoshinaga T (2014) Muon g-2 vs LHC in Supersymmetric Models. JHEP 01:123. https://doi.org/10.1007/JHEP01(2014)123, arXiv:1303.4256 [hep-ph]

  4. Ajaib MA, Dutta B, Ghosh T, Gogoladze I, Shafi Q (2015) Neutralinos and sleptons at the LHC in light of muon \((g-2)_{\mu }\). Phys Rev D 92(7):075033. https://doi.org/10.1103/PhysRevD.92.075033, arXiv:1505.05896 [hep-ph]

  5. ALEPH, DELPHI, L3, OPAL Experiments (2002) Combined LEP Chargino Results, up to 208 GeV for low DM, LEPSUSYWG/02-04.1. http://lepsusy.web.cern.ch/lepsusy/www/inoslowdmsummer02/charginolowdm_pub.html

  6. ALEPH, DELPHI, L3, OPAL Experiments (2004) Combined LEP Selectron/Smuon/Stau Results, 183–208 GeV, Lepsusywg/04-01.1. http://lepsusy.web.cern.ch/lepsusy/www/sleptons_summer04/slep_final.html

  7. ALEPH Collaboration (2002) Search for scalar leptons in \(e^+e^-\) collisions at center-of-mass energies up to 209 GeV. Phys Lett B 526:206–220. https://doi.org/10.1016/S0370-2693(01)01494-0, arXiv:hep-ex/0112011

  8. ALEPH Collaboration (2002) Search for charginos nearly mass degenerate with the lightest neutralino in \(e^+e^-\) collisions at center-of-mass energies up to 209 GeV. Phys Lett B 533:223–236. https://doi.org/10.1016/S0370-2693(02)01584-8, arXiv:hep-ex/0203020

  9. ALEPH Collaboration (2002) Absolute lower limits on the masses of selectrons and sneutrinos in the MSSM. Phys Lett B 544:73–88. https://doi.org/10.1016/S0370-2693(02)02471-1, arXiv:hep-ex/0207056

  10. ALEPH Collaboration (2004) Absolute mass lower limit for the lightest neutralino of the MSSM from \(e^+e^-\) data at \(\sqrt{s}\) up to 209 GeV. Phys Lett B 583:247–263.https://doi.org/10.1016/j.physletb.2003.12.066

  11. DELPHI Collaboration (2003) Searches for supersymmetric particles in \(e^+e^-\) collisions up to 208 GeV and interpretation of the results within the MSSM. Eur Phys J C 31:421–479. https://doi.org/10.1140/epjc/s2003-01355-5, arXiv:hep-ex/0311019

  12. L3 Collaboration (2000) Search for charginos with a small mass difference with the lightest supersymmetric particle at \(\sqrt{s} =\) 189 GeV. Phys Lett B 482:31–42. https://doi.org/10.1016/S0370-2693(00)00488-3, arXiv:hep-ex/0002043

  13. L3 Collaboration (2004) Search for scalar leptons and scalar quarks at LEP. Phys Lett B 580:37–49. https://doi.org/10.1016/j.physletb.2003.10.010, arXiv:hep-ex/0310007

  14. OPAL Collaboration (2004) Search for anomalous production of dilepton events with missing transverse momentum in \(e^+e^-\) collisions at \(\sqrt{s} =\) 183 GeV to 209 GeV. Eur Phys J C 32:453–473. https://doi.org/10.1140/epjc/s2003-01466-y, arXiv:hep-ex/0309014

  15. OPAL Collaboration (2003) Search for nearly mass degenerate charginos and neutralinos at LEP. Eur Phys J C 29:479–489. https://doi.org/10.1140/epjc/s2003-01237-x, arXiv:hep-ex/0210043

  16. ATLAS Collaboration (2014) Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in \(pp\) collisions at \(\sqrt{s} = 8\;\text{TeV}\) with the ATLAS detector. JHEP 05:071. https://doi.org/10.1007/JHEP05(2014)071, arXiv:1403.5294 [hep-ex]

  17. ATLAS Collaboration (2014) Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in \(\sqrt{s} = 8\;\text{ TeV }\)\(pp\) collisions with the ATLAS detector. JHEP 04:169. https://doi.org/10.1007/JHEP04(2014)169, arXiv:1402.7029 [hep-ex]

  18. ATLAS Collaboration (2016) Search for the electroweak production of supersymmetric particles in \(\sqrt{s} = 8\;\text{ TeV }\)\(pp\) collisions with the ATLAS detector. Phys Rev D 93:052002. https://doi.org/10.1103/PhysRevD.93.052002, arXiv:1509.07152 [hep-ex]

  19. ATLAS Collaboration (2016) Dark matter interpretations of ATLAS searches for the electroweak production of supersymmetric particles in \(\sqrt{s} = 8\;\text{ TeV }\) proton–proton collisions. JHEP 09:175. https://doi.org/10.1007/JHEP09(2016)175, arXiv:1608.00872 [hep-ex]

  20. CMS Collaboration (2014) Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and \(W\),\(Z\), and Higgs bosons in \(pp\) collisions at \(8\;\text{ TeV }\). Eur Phys J C 74:3036. https://doi.org/10.1140/epjc/s10052-014-3036-7, arXiv:1405.7570 [hep-ex]

  21. CMS Collaboration (2016) Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton–proton collisions at \(\sqrt{s} = 8\;\text{ TeV }\). Phys Lett B 759:9. https://doi.org/10.1016/j.physletb.2016.05.033, arXiv:1512.08002 [hep-ex]

  22. CMS Collaboration, Search for electroweak production of charginos and neutralinos in multilepton final states in proton–proton collisions at \(\sqrt{s} = 13\;\text{ TeV }\). arXiv:1709.05406 [hep-ex]

  23. Han Z, Kribs GD, Martin A, Menon A (2014) Hunting quasidegenerate Higgsinos. Phys Rev D 89(7):075007. https://doi.org/10.1103/PhysRevD.89.075007, arXiv:1401.1235 [hep-ph]

  24. Baer H, Mustafayev A, Tata X (2014) Monojet plus soft dilepton signal from light higgsino pair production at LHC14. Phys Rev D 90(11):115007. https://doi.org/10.1103/PhysRevD.90.115007, arXiv:1409.7058 [hep-ph]

  25. Giudice GF, Han T, Wang K, Wang L-T (2010) Nearly degenerate gauginos and dark matter at the LHC. Phys Rev D 81:115011. https://doi.org/10.1103/PhysRevD.81.115011, arXiv:1004.4902 [hep-ph]

  26. Schwaller P, Zurita J (2014) Compressed electroweakino spectra at the LHC. JHEP 03:060. https://doi.org/10.1007/JHEP03(2014)060, arXiv:1312.7350 [hep-ph]

  27. Gori S, Jung S, Wang L-T (2013) Cornering electroweakinos at the LHC. JHEP 10:191. https://doi.org/10.1007/JHEP10(2013)191, arXiv:1307.5952 [hep-ph]

  28. Dutta B, Ghosh T, Gurrola A, Johns W, Kamon T, Sheldon P, Sinha K, Wang K, Wu S (2015) Probing compressed sleptons at the LHC using vector boson fusion processes. Phys Rev D 91(5):055025. https://doi.org/10.1103/PhysRevD.91.055025, arXiv:1411.6043 [hep-ph]

  29. Han Z, Liu Y (2015) MT2 to the Rescue—searching for Sleptons in compressed spectra at the LHC. Phys Rev D 92(1):015010. https://doi.org/10.1103/PhysRevD.92.015010, arXiv:1412.0618 [hep-ph]

  30. Barr A, Scoville J (2015) A boost for the EW SUSY hunt: monojet-like search for compressed sleptons at LHC14 with 100 fb \(^{-1}\). JHEP 04:147. https://doi.org/10.1007/JHEP04(2015)147, arXiv:1501.02511 [hep-ph]

  31. ATLAS Collaboration (2018) Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at \(\sqrt{s}=13\) TeV with the ATLAS detector. Phys Rev D97(5):052010. https://doi.org/10.1103/PhysRevD.97.052010, arXiv:1712.08119 [hep-ex]

  32. ATLAS Collaboration (2010) The ATLAS simulation infrastructure. Eur Phys J C 70:823. https://doi.org/10.1140/epjc/s10052-010-1429-9, arXiv:1005.4568 [physics.ins-det]

  33. GEANT4 Collaboration, Agostinelli S, et al (2003) GEANT4—a simulation toolkit. Nucl Instrum Meth A 506:250. https://doi.org/10.1016/S0168-9002(03)01368-8

  34. ATLAS Collaboration (2010) The simulation principle and performance of the ATLAS fast calorimeter simulation FastCaloSim, ATL-PHYS-PUB-2010-013. https://cds.cern.ch/record/1300517

  35. Gleisberg T, Höche S, Krauss F, Schönherr M, Schumann S, Siegert F, Winter J (2009) Event generation with SHERPA 1.1. JHEP 02:007. https://doi.org/10.1088/1126-6708/2009/02/007, arXiv:0811.4622 [hep-ph]

  36. Bothmann E, et al (2019) Event generation with Sherpa 2.2. SciPost Phys 7(3):034. https://doi.org/10.21468/SciPostPhys.7.3.034, arXiv:1905.09127 [hep-ph]

  37. Alioli S, Nason P, Oleari C, Re E (2010) A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX. JHEP 06:043. https://doi.org/10.1007/JHEP06(2010)043, arXiv:1002.2581 [hep-ph]

  38. Alioli S, Nason P, Oleari C, Re E (2009) NLO Higgs boson production via gluon fusion matched with shower in POWHEG. JHEP 04:002. https://doi.org/10.1088/1126-6708/2009/04/002, arXiv:0812.0578 [hep-ph]

  39. Nason P, Oleari C (2010) NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG. JHEP 02:037. https://doi.org/10.1007/JHEP02(2010)037, arXiv:0911.5299 [hep-ph]

  40. Djouadi A, Muhlleitner MM, Spira M (2007) Decays of supersymmetric particles: the program SUSY-HIT (SUspect-SdecaY-Hdecay-InTerface). Acta Phys Polon B 38:635–644 arXiv:hep-ph/0609292

    ADS  Google Scholar 

  41. ATLAS Collaboration (2016) Performance of pile-up mitigation techniques for jets in \(pp\) collisions at \(\sqrt{s}=8\) TeV using the ATLAS detector. Eur Phys J C76(11):581. https://doi.org/10.1140/epjc/s10052-016-4395-z, arXiv:1510.03823 [hep-ex]

  42. ATLAS Collaboration (2016) Optimisation of the ATLAS \(b\)-tagging performance for the 2016 LHC Run, ATL-PHYS-PUB-2016-012. https://cds.cern.ch/record/2160731

  43. ATLAS Collaboration (2016) Performance of \(b\)-jet identification in the ATLAS experiment. JINST 11:P04008. https://doi.org/10.1088/1748-0221/11/04/P04008, arXiv:1512.01094 [hep-ex]

  44. The ATLAS transverse-momentum trigger performance at the LHC in 2011, Tech Rep ATLAS-CONF-2014-002, CERN, Geneva, Feb, 2014. https://cds.cern.ch/record/1647616

  45. ATLAS Collaboration (2017) Performance of the ATLAS trigger system in 2015. Eur Phys J C77(5):317. https://doi.org/10.1140/epjc/s10052-017-4852-3, arXiv:1611.09661 [hep-ex]

  46. CMS Collaboration Collaboration (2016) Search for new physics in the compressed mass spectra scenario using events with two soft opposite-sign leptons and missing transverse momentum at \(\sqrt{s}=13~\rm TeV\). Tech Rep CMS-PAS-SUS-16-025, CERN, Geneva. https://cds.cern.ch/record/2205866

  47. ATLAS Collaboration (2012) Measurement of the \(W W\) cross section in \(\sqrt{s} = 7\,\text{ TeV }\)\(pp\) collisions with the ATLAS detector and limits on anomalous gauge couplings. Phys Lett B 712:289. https://doi.org/10.1016/j.physletb.2012.05.003, arXiv:1203.6232 [hep-ex]

  48. Prospects for Higgs Boson searches using the \(H\rightarrow WW^{(*)}\rightarrow \ell \nu \ell \nu \) decay mode with the ATLAS detector for 10 TeV. Tech Rep ATL-PHYS-PUB-2010-005, CERN, Geneva, Jun, 2010. https://cds.cern.ch/record/1270568

  49. Jet calibration and systematic uncertainties for jets reconstructed in the ATLAS detector at \(\sqrt{s}=13\) TeV. Tech Rep ATL-PHYS-PUB-2015-015, CERN, Geneva, July, 2015. https://cds.cern.ch/record/2037613

  50. ATLAS Collaboration (2017) Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at \(\sqrt{s} = 13\) TeV with the ATLAS detector. Phys Rev D96(7):072002. https://doi.org/10.1103/PhysRevD.96.072002, arXiv:1703.09665 [hep-ex]

  51. Expected performance of missing transverse momentum reconstruction for the ATLAS detector at \(\sqrt{s}= 13~\text{ TeV }\). Tech Rep ATL-PHYS-PUB-2015-023, CERN, Geneva, July, 2015. https://cds.cern.ch/record/2037700

  52. Butterworth J, et al (2016) PDF4LHC recommendations for LHC Run II. J Phys G 43:023001. https://doi.org/10.1088/0954-3899/43/2/023001, arXiv:1510.03865 [hep-ph]

  53. Baak M, Besjes GJ, Cte D, Koutsman A, Lorenz J, Short D (2015) HistFitter software framework for statistical data analysis. Eur Phys J C 75:153. https://doi.org/10.1140/epjc/s10052-015-3327-7, arXiv:1410.1280 [hep-ex]

  54. Cowan G, Cranmer K, Gross E, Vitells O (2011) Asymptotic formulae for likelihood-based tests of new physics. Eur Phys J C 71:1554. https://doi.org/10.1140/epjc/s10052-011-1554-0, arXiv:1007.1727 [physics.data-an]

Download references

Author information

Authors and Affiliations

  1. Physics Department, Lawrence Berkeley National Laboratory, Berkeley, CA, USA

    Elodie Resseguie

Authors
  1. Elodie Resseguie
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Elodie Resseguie .

Rights and permissions

Reprints and permissions

Copyright information

© 2020 The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Resseguie, E. (2020). Search for the EWK Production of Compressed SUSY with Soft Leptons. In: Electroweak Physics at the Large Hadron Collider with the ATLAS Detector. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-57016-3_10

Download citation

Publish with us

Policies and ethics

Search

Navigation