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Symmetry
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Hidden Dark Sector in High Energy Physics
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Special Issue "Hidden Dark Sector in High Energy Physics"

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 31 December 2023 | Viewed by 6505

Special Issue Editor

Dr. Theodota Lagouri
E-Mail Website
Guest Editor
CERN-EP, Espl. des Particules 1, 1211 Meyrin, Switzerland
Interests: ATLAS experiment at LHC at CERN; Higgs physics

Special Issue Information

Dear Colleagues,

The Standard Model (SM), while extremely powerful as a description of strong, electromagnetic and weak interactions, is not a natural candidate to explain dark matter. Theoretical and experimental motivations exist for the existence of a hidden or dark sector of phenomena that couples either weakly or in a special way to SM fields. Hidden sectors near the weak scale are motivated by naturalness, thermal dark matter, electroweak baryogenesis but also represent a generic expectation for physics beyond the SM. If there is such a family of particles and interactions, they may be accessible experimentally at the Large Hadron Collider (LHC) at CERN and at future high energy colliders. As a prototypical hidden sector can be considered, there is the compelling possibility of a spontaneously broken dark U(1)D gauge symmetry, mediated by a vector boson called the dark photon (ZD). The search for such a hidden sector is an important component of the LHC physics program. The LHC provides a unique tool to explore such models where these new states can be produced using, for example, exotic Higgs boson decays to light scalars or light vectors and inclusive dark photon decays or associated productions as a portal to this hidden or dark sector that has remained inaccessible up to now.

Dr. Theodota Lagouri
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • high energy collider physics
  • LHC
  • hidden dark sector
  • exotic Higgs decays
  • dark photon
  • dark matter (DM)
  • beyond the Standard Model (BSM)

Published Papers (4 papers)

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Research

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Article
Particle Physics of the Dark Sector
by
Oliver Baker
,
Andrei Afanasev
,
Theodota Lagouri
,
Jingjing Pan
and
Christian Weber
Symmetry 2022, 14(11), 2238; https://doi.org/10.3390/sym14112238 - 25 Oct 2022
Viewed by 804
Abstract
The mystery associated with a proposed Dark Sector of phenomena that are separate from the standard model of particle physics is described. A Dark Sector may possess matter particles, force carriers which mediate their interactions, and new interactions and symmetries that are beyond [...] Read more.
The mystery associated with a proposed Dark Sector of phenomena that are separate from the standard model of particle physics is described. A Dark Sector may possess matter particles, force carriers which mediate their interactions, and new interactions and symmetries that are beyond the standard model of particle physics. Various approaches for Dark Sector searches are described, including those at the energy frontier at the Large Hadron Collider, in astrophysical interactions with both terrestrial experiments and those in space-born platforms. Searches using low energy photons from microwave energies in cryogenic environments to x-ray energies are also described. While there is no noncontroversial evidence for Dark Sector phenomena presently, new searches with more modern equipment and analysis methods are exploring regions of phase space that have not been available before now, indicating ongoing interest and excitement in this research. Full article
(This article belongs to the Special Issue Hidden Dark Sector in High Energy Physics)
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Review

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Review
Dark Photon Searches via Higgs Boson Production at the LHC and Beyond
by
Sanjoy Biswas
,
Emidio Gabrielli
and
Barbara Mele
Symmetry 2022, 14(8), 1522; https://doi.org/10.3390/sym14081522 - 26 Jul 2022
Cited by 2 | Viewed by 895
Abstract
Many scenarios beyond the standard model, aiming to solve long-standing cosmological and particle physics problems, suggest that dark matter might experience long-distance interactions mediated by an unbroken dark U(1) gauge symmetry, hence foreseeing the existence of a massless dark photon. [...] Read more.
Many scenarios beyond the standard model, aiming to solve long-standing cosmological and particle physics problems, suggest that dark matter might experience long-distance interactions mediated by an unbroken dark U(1) gauge symmetry, hence foreseeing the existence of a massless dark photon. Contrary to the massive dark photon, a massless dark photon can only couple to the standard model sector by means of effective higher dimensional operators. Massless dark photon production at colliders will then in general be suppressed at low energy by a UV energy scale, which is of the order of the masses of portal (messenger) fields connecting the dark and the observable sectors. A violation of this expectation is provided by dark photon production mediated by the Higgs boson, thanks to the non-decoupling Higgs properties. Higgs boson production at colliders, followed by the Higgs decay into a photon and a dark photon, provides then a very promising production mechanism for the dark photon discovery, being insensitive in particular regimes to the UV scale of the new physics. This decay channel gives rise to a peculiar signature characterized by a monochromatic photon with energy half the Higgs mass (in the Higgs rest frame) plus missing energy. We show how such resonant photon-plus-missing-energy signature can uniquely be connected to a dark photon production. Higgs boson production and decay into a photon and a dark photon as a source of dark photons is reviewed at the Large Hadron Collider, in light of the present bounds on the corresponding signature by the CMS and ATLAS collaborations. Perspectives for the dark photon production in Higgs-mediated processes at future e+e− colliders are also discussed. Full article
(This article belongs to the Special Issue Hidden Dark Sector in High Energy Physics)
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Review
Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders
by
Theodota Lagouri
Symmetry 2022, 14(7), 1299; https://doi.org/10.3390/sym14071299 - 22 Jun 2022
Cited by 1 | Viewed by 1037
Abstract
The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to Standard Model (SM) fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states to propose [...] Read more.
The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to Standard Model (SM) fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states to propose a specific candidate for dark matter (DM) in the universe or to explain astrophysical findings. If such a family of Beyond the Standard Model (BSM) particles and interactions exists, it is possible that they will be discovered experimentally at CERN’s Large Hadron Collider (LHC, s≅ 14 TeV) and future High Energy Colliders. The primary emphasis is on a few examples of searches undertaken at the LHC that are relevant to Higgs Hidden–Dark Sector Physics. These studies’ existing constraints and prospects are also reported. Full article
(This article belongs to the Special Issue Hidden Dark Sector in High Energy Physics)
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Review
Collider Searches for Dark Matter through the Higgs Lens
by
Spyros Argyropoulos
,
Oleg Brandt
and
Ulrich Haisch
Symmetry 2021, 13(12), 2406; https://doi.org/10.3390/sym13122406 - 13 Dec 2021
Cited by 19 | Viewed by 2660
Abstract
Despite the fact that dark matter constitutes one of the cornerstones of the standard cosmological paradigm, its existence has so far only been inferred from astronomical observations, and its microscopic nature remains elusive. Theoretical arguments suggest that dark matter might be connected to [...] Read more.
Despite the fact that dark matter constitutes one of the cornerstones of the standard cosmological paradigm, its existence has so far only been inferred from astronomical observations, and its microscopic nature remains elusive. Theoretical arguments suggest that dark matter might be connected to the symmetry-breaking mechanism of the electroweak interactions or of other symmetries extending the Standard Model of particle physics. The resulting Higgs bosons, including the 125 GeV spin-0 particle discovered recently at the Large Hadron Collider, therefore represent a unique tool to search for dark matter candidates at collider experiments. This article reviews some of the relevant theoretical models as well as the results from the searches for dark matter in signatures that involve a Higgs-like particle at the Large Hadron Collider. Full article
(This article belongs to the Special Issue Hidden Dark Sector in High Energy Physics)
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