Towards resolving strongly-interacting dark sectors at colliders

Englert, Christoph; Nordström, Karl; Spannowsky, Michael

doi:10.1103/physrevd.94.055028

Cited by 11 publications

(7 citation statements)

References 118 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As r inv decreases, the distribution in ∆φ becomes peaked towards zero, demonstrating that 5 The ISR spectrum for r inv = 1 is not identical to that for a WIMP. While the number of WIMPs produced in each event is constant, the number of dark hadrons produced in a shower varies from event to event, which can affect the E T spectrum [91]. the missing energy becomes closely aligned along the direction of one of the jets in the event.…”

Section: Dark Sector Showers From Contact Operatorsmentioning

confidence: 99%

LHC searches for dark sector showers

Cohen

Lisanti

Lou

et al. 2017

J. High Energ. Phys.

126

View full text Add to dashboard Cite

This paper proposes a new search program for dark sector parton showers at the Large Hadron Collider (LHC). These signatures arise in theories characterized by strong dynamics in a hidden sector, such as Hidden Valley models. A dark parton shower can be composed of both invisible dark matter particles as well as dark sector states that decay to Standard Model particles via a portal. The focus here is on the specific case of 'semi-visible jets,' jet-like collider objects where the visible states in the shower are Standard Model hadrons. We present a Simplified Modellike parametrization for the LHC observables and propose targeted inclusive search strategies for regions of parameter space that are not covered by existing analyses. Following the 'mono-X' literature, the portal is modeled using either an effective field theoretic contact operator approach or with one of two ultraviolet completions; sensitivity projections are provided for all three cases. We additionally highlight that the LHC has a unique advantage over direct detection experiments in the search for this class of dark matter theories. arXiv:1707.05326v2 [hep-ph]

show abstract

Section: Dark Sector Showers From Contact Operatorsmentioning

confidence: 99%

LHC searches for dark sector showers

Cohen

Lisanti

Lou

et al. 2017

J. High Energ. Phys.

126

View full text Add to dashboard Cite

show abstract

“…A rapidly growing effort is being dedicated to the exploration of dark matter (DM) scenarios where the DM particle does not appear in isolation but as part of a richer dark sector, which may in particular feature new strong interactions [1][2][3][4][5][6][7]. Such dark sectors provide a variety of mechanisms to set the DM relic abundance [8][9][10][11][12] and lead to novel signatures at collider and fixed-target experiments [13][14][15][16][17][18]. Furthermore, dark sectors with significant self-interactions may explain astrophysical small scale structure observations that are in tension with predictions of collisionless cold DM simulations [19].…”

Section: Introductionmentioning

confidence: 99%

Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal

Bernreuther

Kahlhoefer

Krämer

et al. 2020

J. High Energ. Phys.

View full text Add to dashboard Cite

We study the cosmology and LHC phenomenology of a consistent strongly interacting dark sector coupled to Standard Model particles through a generic vector mediator. We lay out the requirements for the model to be cosmologically viable, identify annihilations into dark vector mesons as the dominant dark matter freeze-out process and discuss bounds from direct detection. At the LHC the model predicts dark showers, which can give rise to semi-visible jets or displaced vertices. Existing searches for di-jet resonances and for missing energy mostly probe the parameter regions where prompt decays are expected and constrain our model despite not being optimised for dark showers. We also estimate the sensitivity of dedicated analyses for semi-visible jets and emphasize the complementarity of different search strategies.

show abstract

“…One of the most interesting ramifications of SIMP models is that they naturally give rise to dark-matter self-interactions with cross sections sufficiently large that dark-matter scattering can have an observable impact on structure formation [97]. Such composite darkmatter models can have other phenomenological consequences as well, both at indirect-detection experiments [98,99] and at colliders [100][101][102][103]. Finally, the presence of additional non-Abelian gauge sectors, each with their own analogue of the QCD Θ-angle, could have potential implications for the physics of axions and axion-like particles [104].…”

Section: Discussionmentioning

confidence: 99%

Dynamical Dark Matter from strongly-coupled dark sectors

Huang

Thomas

2017

Phys. Rev. D

View full text Add to dashboard Cite

Dynamical Dark Matter (DDM) is an alternative framework for dark-matter physics in which the dark sector comprises a vast ensemble of particle species whose Standard-Model decay widths are balanced against their cosmological abundances. Previous studies of this framework have focused on a particular class of DDM ensembles-motivated primarily by Kaluza-Klein towers in theories with extra dimensions-in which the density of dark states scales roughly as a polynomial of the mass. In this paper, by contrast, we study the properties of a different class of DDM ensembles in which the density of dark states grows exponentially with mass. Ensembles with this Hagedorn-like property arise naturally as the "hadronic" resonances associated with the confining phase of a strongly-coupled dark sector; they also arise naturally as the gauge-neutral bulk states of Type I string theories. We study the dynamical properties of such ensembles, and demonstrate that an appropriate DDM-like balancing between decay widths and abundances can emerge naturally-even with an exponentially rising density of states. We also study the effective equations of state for such ensembles, and investigate some of the model-independent observational constraints on such ensembles that follow directly from these equations of state. In general, we find that such constraints tend to introduce correlations between various properties of these DDM ensembles such as their associated mass scales, lifetimes, and abundance distributions. For example, we find that these constraints allow DDM ensembles with energy scales ranging from the GeV scale all the way to the Planck scale, but that the total present-day cosmological abundance of the dark sector must be spread across an increasing number of different states in the ensemble as these energy scales are dialed from the Planck scale down to the GeV scale. Numerous other correlations and constraints are also discussed.

show abstract

Towards resolving strongly-interacting dark sectors at colliders

Cited by 11 publications

References 118 publications

LHC searches for dark sector showers

LHC searches for dark sector showers

Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal

Dynamical Dark Matter from strongly-coupled dark sectors

Contact Info

Product

Resources

About