Scalar simplified models for dark matter

Buckley, Matthew R.; Feld, David; Gonçalves, Dorival

doi:10.1103/physrevd.91.015017

Cited by 216 publications

(258 citation statements)

References 285 publications

(322 reference statements)

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“…The complementarity of different DM search avenues plays a very important role in the exploration of DM properties, and thus approaches which allow to fully exploit such complementarity have received a great deal of attention [3][4][5][6][7][8]. The leading two such approaches are effective field theories (EFTs) and DM simplified models.…”

Section: Introductionmentioning

confidence: 99%

Simplified models for dark matter face their consistent completions

2017

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Reprinted with permission from the American Physical Society: Physical Review D 95, 055027 c (2017) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modied, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Simplified dark matter models have been recently advocated as a powerful tool to exploit the complementarity between dark matter direct detection, indirect detection and LHC experimental probes. Focusing on pseudoscalar mediators between the dark and visible sectors, we show that the simplified dark matter model phenomenology departs significantly from that of consistent SUð2Þ L × Uð1Þ Y gauge invariant completions. We discuss the key physics that simplified models fail to capture, and its impact on LHC searches. Notably, we show that resonant mono-Z searches provide competitive sensitivities to standard mono-jet analyses at 13 TeV LHC.

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Section: Introductionmentioning

confidence: 99%

Simplified models for dark matter face their consistent completions

2017

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“…This approach turns out to be very useful and searches for dark matter at colliders are now commonly described in terms of simplified models with scalar, pseudo-scalar, vector and axial-vector mediators [34][35][36][37]. These simplified models have become the main vehicle for interpreting DM searches at the LHC [38,39] and for projecting the DM reach of future hadron colliders [40][41][42].…”

Section: Jhep06(2017)041mentioning

confidence: 99%

Simplified models of dark matter with a long-lived co-annihilation partner

Khoze

Plascencia

Sakurai

2017

J. High Energ. Phys.

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We introduce a new set of simplified models to address the effects of 3-point interactions between the dark matter particle, its dark co-annihilation partner, and the Standard Model degree of freedom, which we take to be the tau lepton. The contributions from dark matter co-annihilation channels are highly relevant for a determination of the correct relic abundance. We investigate these effects as well as the discovery potential for dark matter co-annihilation partners at the LHC. A small mass splitting between the dark matter and its partner is preferred by the co-annihilation mechanism and suggests that the co-annihilation partners may be long-lived (stable or meta-stable) at collider scales. It is argued that such long-lived electrically charged particles can be looked for at the LHC in searches of anomalous charged tracks. This approach and the underlying models provide an alternative/complementarity to the mono-jet and multi-jet based dark matter searches widely used in the context of simplified models with s-channel mediators. We consider four types of simplified models with different particle spins and coupling structures. Some of these models are manifestly gauge invariant and renormalizable, others would ultimately require a UV completion. These can be realised in terms of supersymmetric models in the neutralino-stau co-annihilation regime, as well as models with extra dimensions or composite models.

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“…The strongest limits are placed by collider searches for monojets and missing momentum [21,[45][46][47][48][49][50]. This signature is generated by the production of a and radiation of a gluon, such as in the Feynman diagrams in Fig.…”

Section: Iii1 S-channel Mediatormentioning

confidence: 99%

“…Instead, we consider "simplified models", effective low-energy theories that capture DM-SM interactions via dimension-4 Lagrangian terms [14][15][16][17][18][19][20][21][22][23][24][25]. In these models the new physics sector usually comprises of no more than the DM state and a mediator.…”

Section: Ii1 Literature Reviewmentioning

confidence: 99%

Forbidden dark matter at the weak scale via the top portal

2017

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At the tail of its velocity distribution, cold dark matter (DM) can annihilate at finite temperature to states heavier than itself. We explore the possibility that DM freezeout is dictated by these "forbidden annihilations" at the electroweak scale. Demanding that annihilation products be Standard Model particles, we find that for the forbidden mechanism to primarily set the DM relic abundance, DM must couple predominantly, if not solely, to top quarks. This can be arranged by invoking a non-trivial flavor structure such as Minimal Flavor Violation. We avail two avenues to achieve the correct thermal cross-section, requiring a mediator exchanged in the s-or t-channel. These simplified models submit easily to direct detection and collider searches, and necessarily hide from indirect detection signals. Viable supersymmetric spectra involving the forbidden mechanism may be found if combined with co-annihilation.

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Scalar simplified models for dark matter

Cited by 216 publications

References 285 publications

Simplified models for dark matter face their consistent completions

Simplified models for dark matter face their consistent completions

Simplified models of dark matter with a long-lived co-annihilation partner

Forbidden dark matter at the weak scale via the top portal

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