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The discovery of the Higgs boson in 2012 represented a major milestone accomplished in the field of high-energy physics. Nevertheless, many issues need a deeper investigation. In recent times, there has been a great novel interest in the searches on two crucial aspects which still need confirmation and whose solution may turn out to be one and the same: the identity of the dark matter that pervades the universe and the existence of supersymmetric particles predicted by particle physics theory.

For this purpose, a new generation of accelerators is being designed, where the detection of the experimental signatures of dark matter and supersymmetric particles will be very challenging and will require the development of innovative experimental strategies and more performant detectors. This will imply a qualitative leap compared to the detection techniques used in the experimental apparatus presently in operation.

This Special Issue aims to recapitulate the state of the art and the new ideas in these fields. Highlights on possible innovative experimental techniques and phenomenological reviews providing hints on new detector designs and experimental detection strategies are welcome.

Prof. Dr. Marcello Abbrescia
Prof. Dr. Sabino Meola
Guest Editors

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Keywords

New detectors
New physics
Supersymmetry
Supersymmetric particles
Dark matter
Detector physics
Experimental techniques

Published Papers (2 papers)

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Research

61 pages, 3665 KiB

Open AccessArticle

Reactor Antineutrino Anomaly Reanalysis in Context of Inverse-Square Law Violation

by Vadim A. Naumov and Dmitry S. Shkirmanov

Universe 2021, 7(7), 246; https://doi.org/10.3390/universe7070246 - 15 Jul 2021

Cited by 4 | Viewed by 2337

Abstract

We discuss a possibility that the so-called reactor antineutrino anomaly (RAA), which is a deficit of the

{\bar{ν}}_{e}

rates in the reactor experiments in comparison to the theoretical expectations, can at least in part be explained by applying a quantum field-theoretical [...] Read more.

We discuss a possibility that the so-called reactor antineutrino anomaly (RAA), which is a deficit of the

{\bar{ν}}_{e}

rates in the reactor experiments in comparison to the theoretical expectations, can at least in part be explained by applying a quantum field-theoretical approach to neutrino oscillations, which in particular predicts a small deviation from the classical inverse-square law at short (but still macroscopic) distances between the neutrino source and detector. An extensive statistical analysis of the current reactor data on the integrated

{\bar{ν}}_{e}

event rates vs. baseline is performed to examine this speculation. The obtained results are applied to study another long-standing puzzle—gallium neutrino anomaly (GNA), which is a missing

ν_{e}

flux from

^{37}

Ar and

^{51}

Cr electron-capture decays as measured by the gallium–germanium solar neutrino detectors GALLEX and SAGE. Full article

(This article belongs to the Special Issue Innovative Detection Strategies for New Physics Searches)

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14 pages, 526 KiB

Open AccessArticle

Constraining CP4 3HDM with Top Quark Decays

by Igor P. Ivanov and Semyon A. Obodenko

Universe 2021, 7(6), 197; https://doi.org/10.3390/universe7060197 - 10 Jun 2021

Cited by 8 | Viewed by 1666

Abstract

CP4 3HDM is a unique three-Higgs-doublet model equipped with a higher-order

C P

-symmetry in the scalar and Yukawa sector. Based on a single assumption (the minimal model with a

C P

-symmetry of order 4 and no accidental symmetry), it leads to [...] Read more.

CP4 3HDM is a unique three-Higgs-doublet model equipped with a higher-order

C P

-symmetry in the scalar and Yukawa sector. Based on a single assumption (the minimal model with a

C P

-symmetry of order 4 and no accidental symmetry), it leads to a remarkable correlation between its scalar and Yukawa sectors, which echoes in its phenomenology. A recent scan of the parameter space of CP4 3HDM under the assumption of scalar alignment identified a few dozens of points which passed many flavor constraints. In the present work, however, we show that almost all of these points are now ruled out by the recent LHC searches of

t \to H^{+} b

with subsequent hadronic decays of

H^{+}

. Apart from a few points with charged Higgses heavier than the top quark, only one point survives all the checks, the model with an exotic, non-2HDM-like generation pattern of

H^{+}

couplings with quarks. One can expect many more points with exotic

H^{+}

couplings to quarks if the scalar alignment assumption is relaxed. Full article

(This article belongs to the Special Issue Innovative Detection Strategies for New Physics Searches)

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