Skip to main content
SpringerLink
Log in

Study of LHC searches for a lepton and many jets

  • Published:
Journal of High Energy Physics Aims and scope Submit manuscript

Abstract

Searches for new physics in high-multiplicity events with little or no missing energy are an important component of the LHC program, complementary to analyses that rely on missing energy. We consider the potential reach of searches for events with a lepton and six or more jets, and show they can provide increased sensitivity to many supersymmetric and exotic models that would not be detected through standard missing-energy analyses. Among these are supersymmetric models with gauge mediation, R-parity violation, and light hidden sectors. Moreover, ATLAS and CMS measurements suggest the primary background in this channel is from \( t\overline{t} \), rather than W +jets or QCD, which reduces the complexity of background modeling necessary for such a search. We also comment on related searches where the lepton is replaced with another visible object, such as a Z boson.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. ATLAS collaboration, G. Aad et al., Search for supersymmetric particles in events with lepton pairs and large missing transverse momentum in \( \sqrt{s} \) = 7 TeV proton-proton collisions with the ATLAS experiment, Eur. Phys. J. C 71 (2011) 1682 [arXiv:1103.6214] [INSPIRE].

    Article  ADS  Google Scholar 

  2. ATLAS collaboration, G. Aad et al., Search for an excess of events with an identical flavour lepton pair and significant missing transverse momentum in \( \sqrt{s} \) = 7 TeV proton-proton collisions with the ATLAS detector, Eur. Phys. J. C 71 (2011) 1647 [arXiv:1103.6208] [INSPIRE].

    Article  ADS  Google Scholar 

  3. ATLAS collaboration, G. Aad et al., Search for supersymmetry in pp collisions at \( \sqrt{s} \) = 7 TeV in final states with missing transverse momentum and B − jets, Phys. Lett. B 701 (2011)398 [arXiv:1103.4344] [INSPIRE].

    ADS  Google Scholar 

  4. ATLAS collaboration, G. Aad et al., Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in \( \sqrt{s} \) = 7 TeV proton-proton collisions, Phys. Lett. B 701 (2011) 186 [arXiv:1102.5290] [INSPIRE].

    ADS  Google Scholar 

  5. ATLAS collaboration, G. Aad et al., Search for supersymmetry using final states with one lepton, jets and missing transverse momentum with the ATLAS detector in \( \sqrt{s} \) = 7 TeV pp, Phys. Rev. Lett. 106 (2011) 131802 [arXiv:1102.2357] [INSPIRE].

    Article  ADS  Google Scholar 

  6. CMS collaboration, V. Khachatryan et al., Search for supersymmetry in pp collisions at 7 TeV in events with jets and missing transverse energy, Phys. Lett. B 698 (2011) 196 [arXiv:1101.1628] [INSPIRE].

    ADS  Google Scholar 

  7. CMS collaboration, S. Chatrchyan et al., Search for physics beyond the standard model in opposite-sign dilepton events at \( \sqrt{s} \) = 7 TeV, JHEP 06 (2011) 026 [arXiv:1103.1348] [INSPIRE].

    Article  ADS  Google Scholar 

  8. CMS collaboration, S. Chatrchyan et al., Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy at the LHC, JHEP 06 (2011) 077 [arXiv:1104.3168] [INSPIRE].

    Article  ADS  Google Scholar 

  9. CMS collaboration, S. Chatrchyan et al., Search for supersymmetry in events with a lepton, a photon and large missing transverse energy in pp collisions at \( \sqrt{s} \) = 7 TeV, JHEP 06 (2011)093 [arXiv:1105.3152] [INSPIRE].

    ADS  Google Scholar 

  10. ATLAS collaboration, Search for microscopic black holes in multi-jet final states with the ATLAS detector at \( \sqrt{s} \) = 7 TeV, ATLAS-CONF-2011-068 (2011).

  11. ATLAS collaboration, Search for new physics in multi-body final states at high invariant masses with ATLAS, ATLAS-CONF-2010-088 (2010).

  12. CMS collaboration, V. Khachatryan et al., Search for microscopic black hole signatures at the large hadron collider, Phys. Lett. B 697 (2011) 434 [arXiv:1012.3375] [INSPIRE].

    ADS  Google Scholar 

  13. CDF collaboration, T. Aaltonen et al., Search for new particles leading to Z + jets final states in \( p\overline{p} \) collisions at \( \sqrt{s} \) = 1.96 TeV, Phys. Rev. D 76 (2007) 072006 [arXiv:0706.3264] [INSPIRE].

    ADS  Google Scholar 

  14. D0 collaboration, V. Abazov et al., A quasi model independent search for new physics at large transverse momentum, Phys. Rev. D 64 (2001) 012004 [hep-ex/0011067] [INSPIRE].

    ADS  Google Scholar 

  15. D0 collaboration, B. Abbott et al., A quasi-model-independent search for new high p T physics at DO, Phys. Rev. Lett. 86 (2001) 3712 [hep-ex/0011071] [INSPIRE].

    Article  ADS  Google Scholar 

  16. CDF collaboration, T. Aaltonen et al., Model-independent and quasi-model-independent search for new physics at CDF, Phys. Rev. D 78 (2008) 012002 [arXiv:0712.1311] [INSPIRE].

    ADS  Google Scholar 

  17. CDF collaboration, T. Aaltonen et al., Global search for new physics with 2.0 fb −1 at CDF, Phys. Rev. D 79 (2009) 011101 [arXiv:0809.3781] [INSPIRE].

    ADS  Google Scholar 

  18. CDF collaboration, T. Aaltonen et al., Model-independent global search for new high-p T physics at CDF, arXiv:0712.2534 [INSPIRE].

  19. CMS collaboration, MUSIC — An automated scan for deviations between data and Monte Carlo simulation, PAS-EXO-08-005 (2008).

  20. CMS collaboration, Model unspecific search for new physics in pp collisions at \( \sqrt{s} \) = 7 TeV, PAS-EXO-10-021 (2010).

  21. ATLAS collaboration, A search for new high-mass phenomena producing top quarks with the ATLAS experiment, ATLAS-CONF-2011-070 (2011).

  22. ATLAS collaboration, Search for strong gravity effects in same-sign dimuon final states, ATLAS-CONF-2011-065 (2011).

  23. CMS collaboration, A model independent search for new physics in an inclusive di-lepton event sample, PAS-EXO-10-024 (2010).

  24. CMS collaboration, Search for supersymmetry in events with photons and low missing transverse energy, PAS-SUS-12-014 (2012).

  25. ATLAS collaboration, G. Aad et al., Hunt for new phenomena using large jet multiplicities and missing transverse momentum with ATLAS in 4.7 fb −1 of \( \sqrt{s} \) = 7 TeV proton-proton collisions, JHEP 07 (2012) 167 [arXiv:1206.1760] [INSPIRE].

    Article  ADS  Google Scholar 

  26. CMS collaboration, S. Chatrchyan et al., Jet production rates in association with W and Z bosons in pp collisions at \( \sqrt{s} \) = 7 TeV, JHEP 01 (2012) 010 [arXiv:1110.3226] [INSPIRE].

    Article  ADS  Google Scholar 

  27. ATLAS collaboration, G. Aad et al., Study of jets produced in association with a W boson in pp collisions at \( \sqrt{s} \) = 7 TeV with the ATLAS detector, Phys. Rev. D 85 (2012) 092002 [arXiv:1201.1276] [INSPIRE].

    ADS  Google Scholar 

  28. T. Appelquist, H.-C. Cheng and B.A. Dobrescu, Bounds on universal extra dimensions, Phys. Rev. D 64 (2001) 035002 [hep-ph/0012100] [INSPIRE].

    ADS  Google Scholar 

  29. E. Katz, private communication.

  30. T. Gregoire and E. Katz, A composite gluino at the LHC, JHEP 12 (2008) 084 [arXiv:0801.4799] [INSPIRE].

    Article  ADS  Google Scholar 

  31. N. Arkani-Hamed, A.G. Cohen and H. Georgi, Electroweak symmetry breaking from dimensional deconstruction, Phys. Lett. B 513 (2001) 232 [hep-ph/0105239] [INSPIRE].

    MathSciNet  ADS  Google Scholar 

  32. N. Arkani-Hamed, A. Cohen, E. Katz, A. Nelson, T. Gregoire, et al., The minimal moose for a little Higgs, JHEP 08 (2002) 021 [hep-ph/0206020] [INSPIRE].

    Article  MathSciNet  ADS  Google Scholar 

  33. E. Katz, J.-y. Lee, A.E. Nelson and D.G. Walker, A composite little Higgs model, JHEP 10 (2005)088 [hep-ph/0312287] [INSPIRE].

    Article  MathSciNet  ADS  Google Scholar 

  34. C.T. Hill and R.J. Hill, T − parity violation by anomalies, Phys. Rev. D 76 (2007) 115014 [arXiv:0705.0697] [INSPIRE].

    ADS  Google Scholar 

  35. CMS collaboration, S. Chatrchyan et al., Search for new physics with jets and missing transverse momentum in pp collisions at \( \sqrt{s} \) = 7 TeV, JHEP 08 (2011) 155 [arXiv:1106.4503] [INSPIRE].

    Article  ADS  Google Scholar 

  36. V. Pavlunin and D. Stuart, Background modeling in new physics searches using forward events at LHC, Phys. Rev. D 78 (2008) 035012 [arXiv:0806.2338] [INSPIRE].

    ADS  Google Scholar 

  37. J. Alwall, P. Demin, S. de Visscher, R. Frederix, M. Herquet, et al., MadGraph/MadEvent v4: the new web generation, JHEP 09 (2007) 028 [arXiv:0706.2334] [INSPIRE].

    Article  ADS  Google Scholar 

  38. T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].

    Article  ADS  Google Scholar 

  39. M. Mangano, Fermilab Monte Carlo workshop (2002), unpublished.

  40. T. Plehn, D. Rainwater and P.Z. Skands, Squark and gluino production with jets, Phys. Lett. B 645 (2007) 217 [hep-ph/0510144] [INSPIRE].

    ADS  Google Scholar 

  41. A. Papaefstathiou and B. Webber, Effects of QCD radiation on inclusive variables for determining the scale of new physics at hadron colliders, JHEP 06 (2009) 069 [arXiv:0903.2013] [INSPIRE].

    Article  ADS  Google Scholar 

  42. J. Alwall, K. Hiramatsu, M.M. Nojiri and Y. Shimizu, Novel reconstruction technique for new physics processes with initial state radiation, Phys. Rev. Lett. 103 (2009) 151802 [arXiv:0905.1201] [INSPIRE].

    Article  ADS  Google Scholar 

  43. CMS collaboration, Combination of top pair production cross sections in pp collisions at 7 TeV and comparisons with theory, PAS-TOP-11-001 (2011).

  44. ATLAS collaboration, Measurement of the top quark pair production cross-section with ATLAS in pp collisions at \( \sqrt{s} \) = 7 TeV in dilepton final states, ATLAS-CONF-2011-034 (2011).

  45. M. Cacciari, G.P. Salam and G. Soyez, The \( {{\overline{k}}_t} \) jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].

    Article  ADS  Google Scholar 

  46. K.T. Matchev and S.D. Thomas, Higgs and Z boson signatures of supersymmetry, Phys. Rev. D 62 (2000) 077702 [hep-ph/9908482] [INSPIRE].

    ADS  Google Scholar 

  47. M.J. Strassler, Possible effects of a hidden valley on supersymmetric phenomenology, hep-ph/0607160 [INSPIRE].

  48. ATLAS collaboration, G. Aad et al., Search for supersymmetry using final states with one lepton, jets and missing transverse momentum with the ATLAS detector in \( \sqrt{s} \) = 7 TeV pp, Phys. Rev. Lett. 106 (2011) 131802 [arXiv:1102.2357] [INSPIRE].

    Article  ADS  Google Scholar 

  49. J. Pumplin, D. Stump, J. Huston, H. Lai, P.M. Nadolsky, et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].

    Article  ADS  Google Scholar 

  50. J. Conway et al., Pretty good simulation of high energy collisions, http://physics.ucdavis.edu/~conway/research/software/pgs/pgs4-general.htm.

Download references

Author information

Authors and Affiliations

  1. Princeton Center for Theoretical Science, Princeton, NJ, 08544, U.S.A.

    Mariangela Lisanti

  2. Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2L 2Y5, Canada

    Philip Schuster & Natalia Toro

  3. Institute for Advanced Study, Princeton, New Jersey, 08540, U.S.A.

    Philip Schuster & Natalia Toro

  4. Rutgers University, New Brunswick, New Jersey, 08854, U.S.A.

    Matthew Strassler

Authors
  1. Mariangela Lisanti
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Philip Schuster
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Matthew Strassler
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Natalia Toro
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Mariangela Lisanti.

Additional information

ArXiv ePrint: 1107.5055

Rights and permissions

Reprints and permissions

About this article

Cite this article

Lisanti, M., Schuster, P., Strassler, M. et al. Study of LHC searches for a lepton and many jets. J. High Energ. Phys. 2012, 81 (2012). https://doi.org/10.1007/JHEP11(2012)081

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/JHEP11(2012)081

Keywords

Search

Navigation