Abstract
We present two minimal extensions of the standard model, each giving rise to baryogenesis. They include heavy color-triplet scalars interacting with a light Majorana fermion that can be the dark matter (DM) candidate. The electroweak charges of the new scalars govern their couplings to quarks of different chirality, which leads to different collider signals. These models predict monotop events at the LHC and the energy spectrum of decay products of highly polarized top quarks can be used to establish the chiral nature of the interactions involving the heavy scalars and the DM. Detailed simulation of signal and standard model background events is performed, showing that top quark chirality can be distinguished in hadronic and leptonic decays of the top quarks.
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References
P. Agrawal and V. Rentala, Identifying dark matter interactions in monojet searches, JHEP 05 (2014) 098 [arXiv:1312.5325] [INSPIRE].
J. Andrea, B. Fuks and F. Maltoni, Monotops at the LHC, Phys. Rev. D 84 (2011) 074025 [arXiv:1106.6199] [INSPIRE].
J.F. Kamenik and J. Zupan, Discovering Dark Matter Through Flavor Violation at the LHC, Phys. Rev. D 84 (2011) 111502 [arXiv:1107.0623] [INSPIRE].
J. Wang, C.S. Li, D.Y. Shao and H. Zhang, Search for the signal of monotop production at the early LHC, Phys. Rev. D 86 (2012) 034008 [arXiv:1109.5963] [INSPIRE].
A. Kumar, J.N. Ng, A. Spray and P.T. Winslow, Tracking down the top quark forward-backward asymmetry with monotops, Phys. Rev. D 88 (2013) 075012 [arXiv:1308.3712] [INSPIRE].
E. Alvarez, E. Coluccio Leskow, J. Drobnak and J.F. Kamenik, Leptonic Monotops at LHC, Phys. Rev. D 89 (2014) 014016 [arXiv:1310.7600] [INSPIRE].
B. Fuks, P. Richardson and A. Wilcock, Studying the sensitivity of monotop probes to compressed supersymmetric scenarios at the LHC, Eur. Phys. J. C 75 (2015) 308 [arXiv:1408.3634] [INSPIRE].
R. Allahverdi and B. Dutta, Natural GeV Dark Matter and the Baryon-Dark Matter Coincidence Puzzle, Phys. Rev. D 88 (2013) 023525 [arXiv:1304.0711] [INSPIRE].
R. Allahverdi, B. Dutta and K. Sinha, Cladogenesis: Baryon-Dark Matter Coincidence from Branchings in Moduli Decay, Phys. Rev. D 83 (2011) 083502 [arXiv:1011.1286] [INSPIRE].
B. Dutta, Y. Gao and T. Kamon, Probing Light Nonthermal Dark Matter at the LHC, Phys. Rev. D 89 (2014) 096009 [arXiv:1401.1825] [INSPIRE].
CMS collaboration, Searches for electroweak neutralino and chargino production in channels with Higgs, Z and W bosons in pp collisions at 8 TeV, Phys. Rev. D 90 (2014) 092007 [arXiv:1409.3168] [INSPIRE].
CMS collaboration, Search for Monotop Signatures in Proton-Proton Collisions at \( \sqrt{s}=8 \) TeV, Phys. Rev. Lett. 114 (2015) 101801 [arXiv:1410.1149] [INSPIRE].
CMS collaboration, Search for new physics in a boosted hadronic monotop final state using 12.9 fb−1 of \( \sqrt{s}=13 \) TeV data, CMS-PAS-EXO-16-040 (2016).
E.L. Berger, Q.-H. Cao, J.-H. Yu and H. Zhang, Measuring Top Quark Polarization in Top Pair plus Missing Energy Events, Phys. Rev. Lett. 109 (2012) 152004 [arXiv:1207.1101] [INSPIRE].
J. Alwall, M. Herquet, F. Maltoni, O. Mattelaer and T. Stelzer, MadGraph 5: Going Beyond, JHEP 06 (2011) 128 [arXiv:1106.0522] [INSPIRE].
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].
T. Sjöstrand et al., An introduction to PYTHIA 8.2, Comput. Phys. Commun. 191 (2015) 159 [arXiv:1410.3012] [INSPIRE].
DELPHES 3 collaboration, J. de Favereau et al., DELPHES 3, A modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
M. Cacciari, FastJet: A code for fast k t clustering and more, hep-ph/0607071 [INSPIRE].
J. Anderson et al., Snowmass Energy Frontier Simulations, arXiv:1309.1057 [INSPIRE].
CMS collaboration, Performance of b tagging at \( \sqrt{s}=8 \) TeV in multijet, ttbar and boosted topology events, CMS-PAS-BTV-13-001 (2013).
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ArXiv ePrint: 1507.02271
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Allahverdi, R., Dalchenko, M., Dutta, B. et al. Distinguishing standard model extensions using monotop chirality at the LHC. J. High Energ. Phys. 2016, 46 (2016). https://doi.org/10.1007/JHEP12(2016)046
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DOI: https://doi.org/10.1007/JHEP12(2016)046