Searching for light higgsinos with b-jets and missing leptons


A recently proposed class of supersymmetric models predicts rather light and nearly mass-degenerate higgsinos, while the other superparticles are significantly heavier. In this paper we study the early LHC phenomenology of a benchmark model of this kind. If the squarks and gluinos, and in particular the lighter stop, are still light enough to be within reach, then evidence for our model can be found in hadronic SUSY searches. Moreover, with dedicated searches it will be possible to distinguish the light higgsino model from generic SUSY models with a bino LSP. Search channels with b-jets and with isolated leptons play a crucial role for model discrimination.


  1. [1]

    F. Brummer and W. Buchmüller, Light higgsinos as heralds of higher-dimensional unification, JHEP 07 (2011) 010 [arXiv:1105.0802] [INSPIRE].

    ADS  Article  Google Scholar 

  2. [2]

    H. Baer, V. Barger and P. Huang, Hidden SUSY at the LHC: the light higgsino-world scenario and the role of a lepton collider, JHEP 11 (2011) 031 [arXiv:1107.5581] [INSPIRE].

    ADS  Article  Google Scholar 

  3. [3]

    S. Bornhauser, M. Drees, S. Grab and J. Kim, Light stop searches at the LHC in events with two b-jets and missing energy, Phys. Rev. D 83 (2011) 035008 [arXiv:1011.5508] [INSPIRE].

    ADS  Google Scholar 

  4. [4]

    M. Papucci, J.T. Ruderman and A. Weiler, Natural SUSY endures, arXiv:1110.6926 [INSPIRE].

  5. [5]

    X.-J. Bi, Q.-S. Yan and P.-F. Yin, Probing light stop pairs at the LHC, arXiv:1111.2250 [INSPIRE].

  6. [6]

    N. Desai and B. Mukhopadhyaya, Constraints on supersymmetry with light third family from LHC data, arXiv:1111.2830 [INSPIRE].

  7. [7]

    C. Brust, A. Katz, S. Lawrence and R. Sundrum, SUSY, the third generation and the LHC, arXiv:1110.6670 [INSPIRE].

  8. [8]

    G.L. Kane, Perspectives on supersymmetry, World Scientific, Singapore (1998).

    MATH  Google Scholar 

  9. [9]

    C. Csáki, A. Falkowski, Y. Nomura and T. Volansky, New approach to the μ-Bμ problem of gauge-mediated supersymmetry breaking, Phys. Rev. Lett. 102 (2009) 111801 [arXiv:0809.4492] [INSPIRE].

    ADS  Article  Google Scholar 

  10. [10]

    A. De Simone, R. Franceschini, G.F. Giudice, D. Pappadopulo and R. Rattazzi, Lopsided gauge mediation, JHEP 05 (2011) 112 [arXiv:1103.6033] [INSPIRE].

    ADS  Article  Google Scholar 

  11. [11]

    Z. Lalak, S. Pokorski and K. Turzynski, Gravity in gauge mediation, JHEP 10 (2008) 016 [arXiv:0808.0470] [INSPIRE].

    MathSciNet  ADS  Article  Google Scholar 

  12. [12]

    B. Allanach, SOFTSUSY: a program for calculating supersymmetric spectra, Comput. Phys. Commun. 143 (2002) 305 [hep-ph/0104145] [INSPIRE].

    ADS  MATH  Article  Google Scholar 

  13. [13]

    J. Alwall et al., MadGraph/MadEvent v4: the new web generation, JHEP 09 (2007) 028 [arXiv:0706.2334] [INSPIRE].

    ADS  Article  Google Scholar 

  14. [14]

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

    ADS  Article  Google Scholar 

  15. [15]

    J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].

    ADS  Article  Google Scholar 

  16. [16]

    M. Mühlleitner, SDECAY: a Fortran code for SUSY particle decays in the MSSM, Acta Phys. Polon. B 35 (2004) 2753 [hep-ph/0409200] [INSPIRE].

    ADS  Google Scholar 

  17. [17]

    S. Ovyn, X. Rouby and V. Lemaitre, DELPHES, a framework for fast simulation of a generic collider experiment, arXiv:0903.2225 [INSPIRE].

  18. [18]

    N. Kidonakis, Top quark pair and single top production at Tevatron and LHC energies, PoS (ICHEP 2010) 059 [arXiv:1008.2460] [INSPIRE].

  19. [19]

    J.M. Campbell, R. Ellis and C. Williams, Vector boson pair production at the LHC, JHEP 07 (2011) 018 [arXiv:1105.0020] [INSPIRE].

    ADS  Article  Google Scholar 

  20. [20]

    P. Torrielli and S. Frixione, Matching NLO QCD computations with PYTHIA using MC@NLO, JHEP 04 (2010) 110 [arXiv:1002.4293] [INSPIRE].

    ADS  Article  Google Scholar 

  21. [21]

    L. Randall and D. Tucker-Smith, Dijet searches for supersymmetry at the LHC, Phys. Rev. Lett. 101 (2008) 221803 [arXiv:0806.1049] [INSPIRE].

    ADS  Article  Google Scholar 

  22. [22]

    CMS collaboration, SUSY searches with dijet events, CMS-PAS-SUS-08-005 (2008).

  23. [23]

    CMS collaboration, Search strategy for exclusive multi-jet events from supersymmetry at CMS, CMS-PAS-SUS-09-001 (2009).

Download references

Author information



Corresponding author

Correspondence to F. Brümmer.

Additional information

ArXiv ePrint: 1111.6005

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Bobrovskyi, S., Brümmer, F., Buchmüller, W. et al. Searching for light higgsinos with b-jets and missing leptons. J. High Energ. Phys. 2012, 122 (2012).

Download citation


  • Supersymmetry Phenomenology