Abstract
We examine the collider signatures of a WIMP dark matter scenario comprising a singlet fermion and an SU(2) n-plet fermion, with a focus on n = 3 and n = 5. The singlet and n-plet masses are of the order of the electroweak scale. The n-plet contains new charged particles which will be copiously pair-produced at the LHC. Small mixing angles and near-degenerate masses, both of which feature naturally in these models, give rise to long-lived particles and their characteristic collider signatures. In particular, the n = 5 model can be constrained by displaced lepton searches independently of the mixing angle, generically ruling out 5-plet masses below about 280 GeV. For small mixing angles, we show that there is a parameter range for which the model reproduces the observed thermal relic density but is severely constrained by disappearing track searches in both the n = 3 and the n = 5 cases. The n = 3 model is further constrained by soft di-lepton searches irrespective of whether any of the new particles are long-lived.
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References
M. Cirelli, N. Fornengo and A. Strumia, Minimal dark matter, Nucl. Phys. B 753 (2006) 178 [hep-ph/0512090] [INSPIRE].
M. Cirelli and A. Strumia, Minimal dark matter: model and results, New J. Phys. 11 (2009) 105005 [arXiv:0903.3381] [INSPIRE].
T. Golling et al., Physics at a 100 TeV pp collider: beyond the standard model phenomena, CERN Yellow Report (2017) 441 [arXiv:1606.00947] [INSPIRE].
M. Cirelli et al., Gamma ray tests of minimal dark matter, JCAP 10 (2015) 026 [arXiv:1507.05519] [INSPIRE].
A. Bharucha, F. Brümmer and R. Ruffault, Well-tempered n-plet dark matter, JHEP 09 (2017) 160 [arXiv:1703.00370] [INSPIRE].
L. Di Luzio, R. Gröber, J.F. Kamenik and M. Nardecchia, Accidental matter at the LHC, JHEP 07 (2015) 074 [arXiv:1504.00359] [INSPIRE].
B. Ostdiek, Constraining the minimal dark matter fiveplet with LHC searches, Phys. Rev. D 92 (2015) 055008 [arXiv:1506.03445] [INSPIRE].
L. Lopez Honorez, M.H.G. Tytgat, P. Tziveloglou and B. Zaldivar, On minimal dark matter coupled to the Higgs, JHEP 04 (2018) 011 [arXiv:1711.08619] [INSPIRE].
S. Kumar Agarwalla, K. Ghosh and A. Patra, Sub-TeV quintuplet minimal dark matter with left-right symmetry, JHEP 05 (2018) 123 [arXiv:1803.01670] [INSPIRE].
H. Baer et al., Exploring the BWCA (Bino-Wino Co-Annihilation) scenario for neutralino dark matter, JHEP 12 (2005) 011 [hep-ph/0511034] [INSPIRE].
N. Arkani-Hamed, A. Delgado and G.F. Giudice, The well-tempered neutralino, Nucl. Phys. B 741 (2006) 108 [hep-ph/0601041] [INSPIRE].
M. Ibe, A. Kamada and S. Matsumoto, Mixed (cold+warm) dark matter in the bino-wino coannihilation scenario, Phys. Rev. D 89 (2014) 123506 [arXiv:1311.2162] [INSPIRE].
N. Nagata, H. Otono and S. Shirai, Probing bino-wino coannihilation at the LHC, JHEP 10 (2015) 086 [arXiv:1506.08206] [INSPIRE].
K. Rolbiecki and K. Sakurai, Long-lived bino and wino in supersymmetry with heavy scalars and higgsinos, JHEP 11 (2015) 091 [arXiv:1506.08799] [INSPIRE].
P. Chardonnet, P. Salati and P. Fayet, Heavy triplet neutrinos as a new dark matter option, Nucl. Phys. B 394 (1993) 35 [INSPIRE].
G. Brooijmans et al., Les Houches 2017: physics at TeV colliders new physics working group report, arXiv:1803.10379 [INSPIRE].
K. Griest and D. Seckel, Three exceptions in the calculation of relic abundances, Phys. Rev. D 43 (1991) 3191 [INSPIRE].
Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, Astron. Astrophys. 594 (2016) A13 [arXiv:1502.01589] [INSPIRE].
M. Ibe, S. Matsumoto and R. Sato, Mass splitting between charged and neutral winos at two-loop level, Phys. Lett. B 721 (2013) 252 [arXiv:1212.5989] [INSPIRE].
R.T. D’Agnolo, D. Pappadopulo and J.T. Ruderman, Fourth exception in the calculation of relic abundances, Phys. Rev. Lett. 119 (2017) 061102 [arXiv:1705.08450] [INSPIRE].
M. Garny, J. Heisig, B. Lülf and S. Vogl, Coannihilation without chemical equilibrium, Phys. Rev. D 96 (2017) 103521 [arXiv:1705.09292] [INSPIRE].
CMS collaboration, Search for displaced supersymmetry in events with an electron and a muon with large impact parameters, Phys. Rev. Lett. 114 (2015) 061801 [arXiv:1409.4789] [INSPIRE].
CMS collaboration, Search for displaced leptons in the e-μ channel, CMS-PAS-EXO-16-022 (2016).
ALEPH, DELPHI, L3 and OPAL experiments, Combined LEP chargino results, up to 208 GeV for low DM, LEPSUSYWG/02-04.1.
ALEPH, DELPHI, L3 and OPAL experiments, Combined LEP chargino results, up to 208 GeV for large m 0, LEPSUSYWG/01-03.1.
CMS collaboration, Search for heavy stable charged particles with 12.9 fb −1 of 2016 data, CMS-PAS-EXO-16-036 (2016).
CMS collaboration, Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at \( \sqrt{s}=13 \) TeV, CMS-PAS-SUS-16-048 (2016).
ATLAS collaboration, Search for long-lived charginos based on a disappearing-track signature in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, JHEP 06 (2018) 022 [arXiv:1712.02118] [INSPIRE].
ATLAS collaboration, Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at \( \sqrt{s} = 8 \) TeV with the ATLAS detector, Phys. Rev. D 88 (2013) 112006 [arXiv:1310.3675] [INSPIRE].
CMS collaboration, Search for disappearing tracks in proton-proton collisions at \( \sqrt{s} = 8 \) TeV, JHEP 01 (2015) 096 [arXiv:1411.6006] [INSPIRE].
T. Sjöstrand et al., An introduction to PYTHIA 8.2, Comput. Phys. Commun. 191 (2015) 159 [arXiv:1410.3012] [INSPIRE].
A. Alloul et al., FeynRules 2.0 — A complete toolbox for tree-level phenomenology, Comput. Phys. Commun. 185 (2014) 2250 [arXiv:1310.1921] [INSPIRE].
J. Alwall et al., MadGraph 5: going beyond, JHEP 06 (2011) 128 [arXiv:1106.0522] [INSPIRE].
C. Degrande et al., UFO — The Universal FeynRules Output, Comput. Phys. Commun. 183 (2012) 1201 [arXiv:1108.2040] [INSPIRE].
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Bharucha, A., Brümmer, F. & Desai, N. Next-to-minimal dark matter at the LHC. J. High Energ. Phys. 2018, 195 (2018). https://doi.org/10.1007/JHEP11(2018)195
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DOI: https://doi.org/10.1007/JHEP11(2018)195