Supersymmetric dark matter after LHC run 1

E. A. Bagnaschi, O. Buchmueller, R. Cavanaugh, M. Citron, A. De Roeck, M. J. Dolan, J. R. Ellis, H. Flächer, S. Heinemeyer, G. Isidori, S. Malik, D. Martínez Santos, K. A. Olive, K. Sakurai, K. J. de Vries, G. Weiglein

Research output: Contribution to journalArticlepeer-review

96 Scopus citations


Different mechanisms operate in various regions of the MSSM parameter space to bring the relic density of the lightest neutralino, $$\tilde{\chi }^0_{1}$$χ~10, assumed here to be the lightest SUSY particle (LSP) and thus the dark matter (DM) particle, into the range allowed by astrophysics and cosmology. These mechanisms include coannihilation with some nearly degenerate next-to-lightest supersymmetric particle such as the lighter stau $$\tilde{\tau }_{1}$$τ~1, stop $$\tilde{t}_{1}$$t~1 or chargino $$\tilde{\chi }^\pm _{1}$$χ~1±, resonant annihilation via direct-channel heavy Higgs bosons H / A, the light Higgs boson h or the Z boson, and enhanced annihilation via a larger Higgsino component of the LSP in the focus-point region. These mechanisms typically select lower-dimensional subspaces in MSSM scenarios such as the CMSSM, NUHM1, NUHM2, and pMSSM10. We analyze how future LHC and direct DM searches can complement each other in the exploration of the different DM mechanisms within these scenarios. We find that the $${\tilde{\tau }_1}$$τ~1 coannihilation regions of the CMSSM, NUHM1, NUHM2 can largely be explored at the LHC via searches for $$/ \!\!\!\! E_T$$/ET events and long-lived charged particles, whereas their H / A funnel, focus-point and $$\tilde{\chi }^\pm _{1}$$χ~1± coannihilation regions can largely be explored by the LZ and Darwin DM direct detection experiments. We find that the dominant DM mechanism in our pMSSM10 analysis is $$\tilde{\chi }^\pm _{1}$$χ~1± coannihilation: parts of its parameter space can be explored by the LHC, and a larger portion by future direct DM searches.

Original languageEnglish (US)
Article number500
JournalEuropean Physical Journal C
Issue number10
StatePublished - Oct 1 2015

Bibliographical note

Funding Information:
The work of O.B., J.E., S.M., K.A.O., K.S. and V. is supported in part by the London Centre for Terauniverse Studies (LCTS), using funding from the European Research Council via the Advanced Investigator Grant 267352. The work of R.C. is supported in part by the National Science Foundation under Grant No. PHY-1151640 at the University of Illinois Chicago and in part by Fermilab, operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy. This work of M.J.D. is supported in part by the Australia Research Council. The work of J.E. is also supported in part by STFC (UK) via the research Grant ST/L000326/1, and the work of H.F. is also supported in part by STFC (UK). The work of S.H. is supported in part by CICYT (Grant FPA 2013-40715-P) and by the Spanish MICINN’s Consolider-Ingenio 2010 Program under grant MultiDark CSD2009-00064. The work of D.M.-S. is supported by the European Research Council via Grant BSMFLEET 639068. The work of K.A.O. is supported in part by DOE Grant DE-SC0011842 at the University of Minnesota. The work of G.W. is supported in part by the Collaborative Research Center SFB676 of the DFG, “Particles, Strings and the early Universe”, and by the European Commission through the “HiggsTools” Initial Training Network PITN-GA-2012-316704.

Publisher Copyright:
© 2015, The Author(s).


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