Constraining dark sectors at colliders: Beyond the effective theory approach

Harris, P.; Khoze, Valentin V.; Spannowsky, Michael; Williams, Ciaran

doi:10.1103/physrevd.91.055009

Cited by 127 publications

(151 citation statements)

References 132 publications

(200 reference statements)

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“…Our results can be easily generalized to Majorana fermions [5]), whose interactions with the SM occur via a pseudoscalar mediator a [4,[20][21][22][23][24], namely…”

Section: Simplified Pseudoscalar Portal For Dark Mattermentioning

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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“…Our results can be easily generalized to Majorana fermions [5]), whose interactions with the SM occur via a pseudoscalar mediator a [4,[20][21][22][23][24], namely…”

Section: Simplified Pseudoscalar Portal For Dark Mattermentioning

confidence: 99%

Simplified models for dark matter face their consistent completions

2017

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“…[27]). This allows us to study DM phenomenology in terms of a handful of masses and couplings [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] (with the further advantage of having the mediator in the spectrum) and allows us to combine mono-jet searches with complementary searches for resonances or mono-V events [46][47][48].…”

Section: Simplified Models For Vector Mediatorsmentioning

confidence: 99%

You can hide but you have to run: direct detection with vector mediators

DʼEramo

Kavanagh

Panci

2016

J. High Energ. Phys.

124

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We study direct detection in simplified models of Dark Matter (DM) in which interactions with Standard Model (SM) fermions are mediated by a heavy vector boson. We consider fully general, gauge-invariant couplings between the SM, the mediator and both scalar and fermion DM. We account for the evolution of the couplings between the energy scale of the mediator mass and the nuclear energy scale. This running arises from virtual effects of SM particles and its inclusion is not optional. We compare bounds on the mediator mass from direct detection experiments with and without accounting for the running. In some cases the inclusion of these effects changes the bounds by several orders of magnitude, as a consequence of operator mixing which generates new interactions at low energy. We also highlight the importance of these effects when translating LHC limits on the mediator mass into bounds on the direct detection cross section. For an axial-vector mediator, the running can alter the derived bounds on the spin-dependent DM-nucleon cross section by a factor of two or more. Finally, we provide tools to facilitate the inclusion of these effects in future studies: general approximate expressions for the low energy couplings and a public code runDM to evolve the couplings between arbitrary energy scales.

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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.

Self Cite

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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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Constraining dark sectors at colliders: Beyond the effective theory approach

Cited by 127 publications

References 132 publications

Simplified models for dark matter face their consistent completions

Simplified models for dark matter face their consistent completions

You can hide but you have to run: direct detection with vector mediators

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

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