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Flavor and collider signatures of asymmetric dark matter

Kim, Ian-Woo and Zurek, Kathryn M. (2014) Flavor and collider signatures of asymmetric dark matter. Physical Review D, 89 (3). Art. no. 035008. ISSN 1550-7998. doi:10.1103/physrevd.89.035008.

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We consider flavor constraints on, and collider signatures of, asymmetric dark matter (ADM) via higher dimension operators. In the supersymmetric models we consider, R-parity-violating (RPV) operators carrying B−L interact with n dark matter particles X through an interaction of the form W=X^nO_(B−L), where O_(B−L)=qℓd^c, u^cd^cd^c, ℓℓe^c. This interaction ensures that the lightest ordinary supersymmetric particle is unstable to decay into the X sector, leading to a higher multiplicity of final state particles and reduced missing energy at a collider. Flavor-violating processes place constraints on the scale of the higher dimension operator, impacting whether the LOSP decays promptly. While the strongest limitations on RPV from n−n oscillations and proton decay do not apply to ADM, we analyze the constraints from meson mixing, μ−e conversion, μ→3e and b→sℓ+ℓ−. We show that these flavor constraints, even in the absence of flavor symmetries, allow parameter space for prompt decay to the X sector, with additional jets and leptons in exotic flavor combinations. We study the constraints from existing 8 TeV LHC Supersymmetry (SUSY) searches with (i) 2–6 jets plus missing energy and (ii) 1–2 leptons, 3–6 jets plus missing energy, comparing the constraints on ADM-extended supersymmetry with the usual supersymmetric simplified models.

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Additional Information:© 2014 American Physical Society. (Received 21 October 2013; published 19 February 2014) We thank Yuval Grossman, Michele Papucci and Lian-Tao Wang for discussions and Anson Hook for pointing out a problem in one of the Monte Carlo tools that we employ. We thank an anonymous referee for pointing out possible flavor violation from squark mass splitting and for checking a typo in the formulas. We also thank the Theory Group at Lawrence Berkeley National Laboratory for hospitality while part of this work was being completed. This work is supported by NSF CAREER Grant No. PHY 1049896, by the DOE under Contract No. de-sc0007859, and also in part by the CERN-Korean Fellowship through the National Research Foundation of Korea.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0007859
National Research Foundation of KoreaUNSPECIFIED
Issue or Number:3
Classification Code:PACS numbers: 12.60.Jv, 11.30.Hv, 12.60.−i, 95.35.+d
Record Number:CaltechAUTHORS:20190613-164148611
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96409
Deposited By: George Porter
Deposited On:17 Jun 2019 20:20
Last Modified:16 Nov 2021 17:20

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