Dark photon limits: A handbook

Caputo, Andrea; Millar, Alexander J.; O’Hare, Ciaran A. J.; Vitagliano, Edoardo

doi:10.1103/physrevd.104.095029

Cited by 174 publications

(140 citation statements)

References 202 publications

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“…A recent review can be found in Ref. [5]. A massive virtual photon produced by any process in a hadron-hadron collision has some probability of conversion to an A , governeed by the kinetic mixing parameter .…”

Section: Dark Photonsmentioning

confidence: 99%

“…[1][2][3]. There are many possible so-called portals; these are neutral particles that couple weakly to the SM and also to DM particles (but being unstable are not themselves DM candidates), such as dark photons [4][5][6], heavy neutral leptons [7,8], axion-like particles [9][10][11], and scalars or dark Higgs particles [12,13]. The proposed new CMS subsystem, FACET (Forward-Aperture CMS ExTension), can search for many such portals (called here X 0 ) depending only on their forward production cross section, momentum, mass m X 0 , and proper lifetime cτ .…”

Section: Introductionmentioning

confidence: 99%

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FACET: A new long-lived particle detector in the very forward region of the CMS experiment

Cerci,

Lazic

et al. 2022

Preprint

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We describe a proposal to add a set of very forward detectors to CMS for the high-luminosity era of the Large Hadron Collider to search for beyond the standard model long-lived particles, such as dark photons, heavy neutral leptons, axion-like particles, and dark Higgs bosons. The proposed subsystem is called FACET for Forward-Aperture CMS ExTension, and will be sensitive to any particles that can penetrate at least 50 m of magnetized iron and decay in an 18 m long, 1 m diameter vacuum pipe. The decay products will be measured in detectors using identical technology to the planned CMS Phase-2 upgrade.

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Section: Dark Photonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FACET: A new long-lived particle detector in the very forward region of the CMS experiment

Cerci,

Lazic

et al. 2022

Preprint

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“…Worthy of further investigation are also more detailed studies on the complementarity between our results and other observational probes of ultralight particles such as cosmological [231][232][233][234][235], astrophysical [236][237][238][239][240], astronomical [241][242][243][244][245], and laboratory tests [246][247][248][249][250]. On the more technical side, we have made rather minimal assumptions on the ultralight (pseudo)scalar sector, but these could be relaxed in order to entertain a scenario which is theoretically (and ideally observationally) richer, featuring for instance self-interactions and kinetic mixing between different fields.…”

Section: Discussionmentioning

confidence: 76%

Superradiance evolution of black hole shadows revisited

Roy,

Vagnozzi,

Visinelli

2021

Preprint

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Black hole (BH) shadows can be used to probe new physics in the form of ultra-light particles via the phenomenon of superradiant instability. By directly affecting the BH mass and spin, superradiance can lead to a time evolution of the BH shadow, which nonetheless has been argued to be unobservable through Very Long Baseline Interferometry (VLBI) over realistic observation timescales. We revisit the superradiance-induced BH shadow evolution including the competing effects of gas accretion and gravitational wave (GW) emission and, as a first step towards modelling realistic new physics scenarios which predict the existence of multiple ultra-light species, we study the system in the presence of two ultra-light bosons, whose combined effect could help reducing the shadow evolution timescale. We find that accretion and GW emission play a negligible role in our results (justifying previous simplified analyses), and that contrary to our intuition the inclusion of an additional ultra-light boson does not shorten the BH shadow evolution timescale and hence improve detection prospects. However, we point out an important subtlety concerning the observationally meaningful definition of the superradiance-induced BH shadow evolution timescale, which reduces the latter by about an order of magnitude, opening up the possibility of observing the superradiance-induced BH shadow evolution with upcoming VLBI arrays, provided angular resolutions just below the µas level can be reached. As a concrete example, we show that the angular size of the shadow of SgrA * can change by up to 0.6 µas over a period as short as 16 years, which further strengthens the scientific case for targeting the shadow of SgrA * with next-generation VLBI arrays.

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“…These constraints can be respected for sufficiently small couplings, and, as evident from (2.7), it is possible to simultaneously keep ∆V nonnegligible if the mediator mass m A D is sufficiently light. Numerous other constraints from colliders, beam dumps, fixed targets, meson decays, stellar cooling, anomalous magnetic dipole moments, etc., also apply in different regions of parameter space of (2.5) [73][74][75][76]. We will, however, defer these considerations to a future work.…”

Section: The Minimal Case As a Toy Modelmentioning

confidence: 99%

Quasi-Sterile Neutrinos from Dark Sectors I. BSM matter effects in neutrino oscillations and the short-baseline anomalies

Alves,

Louis,

deNiverville

2022

Preprint

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Quasi-sterile neutrinos are a natural consequence of dark sectors interacting with the Standard Model (SM) sector via neutrino-and vector-portals. Essentially, quasisterile neutrinos are light dark sector fermions with two generic properties: (i) they mix with the active neutrinos of the SM, and (ii) they are charged under a vector mediator that couples feebly to SM matter. Various interesting phenomenological consequences result from this class of particles. In this article, we investigate one such consequence: new, beyond the SM matter effects that can alter in-medium neutrino oscillations. In particular, for special windows of energy and matter densities, active neutrinos can resonantly oscillate into sterile neutrinos. We take advantage of this feature to build a quasi-sterile neutrino model that can explain the MiniBooNE and LSND anomalies, while remaining compatible with observations from long-baseline reactor-and accelerator-based neutrino experiments. This model is also likely compatible with the recent results reported by the MicroBooNE collaboration (albeit we cannot precisely quantify this claim due to a lack of information in MicroBooNE's public data releases to date). Implications for solar neutrinos and ν e disappearance searches are also briefly discussed.

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Dark photon limits: A handbook

Cited by 174 publications

References 202 publications

FACET: A new long-lived particle detector in the very forward region of the CMS experiment

FACET: A new long-lived particle detector in the very forward region of the CMS experiment

Superradiance evolution of black hole shadows revisited

Quasi-Sterile Neutrinos from Dark Sectors I. BSM matter effects in neutrino oscillations and the short-baseline anomalies

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