Author:
Cohen Timothy,Doss Joel,Freytsis Marat
Abstract
Abstract
We examine the robustness of collider phenomenology predictions for a dark sector scenario with QCD-like properties. Pair production of dark quarks at the LHC can result in a wide variety of signatures, depending on the details of the new physics model. A particularly challenging signal results when prompt production induces a parton shower that yields a high multiplicity of collimated dark hadrons with subsequent decays to Standard Model hadrons. The final states contain jets whose substructure encodes their non-QCD origin. This is a relatively subtle signature of strongly coupled beyond the Standard Model dynamics, and thus it is crucial that analyses incorporate systematic errors to account for the approximations that are being made when modeling the signal. We estimate theoretical uncertainties for a canonical substructure observable designed to be sensitive to the gauge structure of the underlying object, the two-point energy correlator $$ {e}_2^{\left(\beta \right)} $$
e
2
β
, by computing envelopes between resummed analytic distributions and numerical results from Pythia. We explore the separability against the QCD background as the confinement scale, number of colors, number of flavors, and dark quark masses are varied. Additionally, we investigate the uncertainties inherent to modeling dark sector hadronization. Simple estimates are provided that quantify one’s ability to distinguish these dark sector jets from the overwhelming QCD background. Such a search would benefit from theory advances to improve the predictions, and the increase in statistics using the data to be collected at the high luminosity LHC.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference127 articles.
1. J. Alwall, M.-P. Le, M. Lisanti and J.G. Wacker, Model-Independent Jets plus Missing Energy Searches, Phys. Rev. D 79 (2009) 015005 [arXiv:0809.3264] [INSPIRE].
2. J. Alwall, P. Schuster and N. Toro, Simplified Models for a First Characterization of New Physics at the LHC, Phys. Rev. D 79 (2009) 075020 [arXiv:0810.3921] [INSPIRE].
3. LHC New Physics Working Group collaboration, Simplified Models for LHC New Physics Searches, J. Phys. G 39 (2012) 105005 [arXiv:1105.2838] [INSPIRE].
4. M.J. Strassler and K.M. Zurek, Echoes of a hidden valley at hadron colliders, Phys. Lett. B 651 (2007) 374 [hep-ph/0604261] [INSPIRE].
5. T. Han, Z. Si, K.M. Zurek and M.J. Strassler, Phenomenology of hidden valleys at hadron colliders, JHEP 07 (2008) 008 [arXiv:0712.2041] [INSPIRE].
Cited by
27 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献