scholarly journals Search for relativistic magnetic monopoles with ten years of the ANTARES detector data

2021 ◽  
Vol 16 (11) ◽  
pp. C11004
Author(s):  
J. Boumaaza ◽  
J. Brunner ◽  
A. Moussa ◽  
Y. Tayalati
Keyword(s):  
Cross Section ◽  
Magnetic Monopole ◽  
High Energy ◽  
Magnetic Monopoles ◽  
Neutrino Telescope ◽  
Grand Unification ◽  
Speed Of Light ◽  
Galactic Magnetic Fields ◽  
The Earth ◽  
Using Data

Abstract The presented study is an updated search for Magnetic Monopoles (MMs) using data taken with the ANTARES neutrino telescope over a period of 10 years (January 2008 to December 2017). In accordance with some Grand Unification Theories (GUT), MMs were created during the phase of symmetry breaking in the early Universe, and accelerated by inter-galactic magnetic fields. As a consequence of their high energy, they could cross the Earth and emit a significant signal in a Cherenkov-based telescope like ANTARES, for appropriate mass and velocity ranges. This analysis a new simulation of MMs taking into account the Kasama, Yang and Goldhaber (KYG) model for their cross section with matter. The results obtained for relativistic magnetic monopoles with β = v/c ⩾ 0.817, where v is the magnetic monopole velocity and c the speed of light in vacuum, are presented.

scholarly journals Phenomenology of magnetic black holes with electroweak-symmetric coronas

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Yang Bai ◽  
Joshua Berger ◽  
Mrunal Korwar ◽  
Nicholas Orlofsky
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Hawking Radiation ◽  
Large Scale ◽  
Scale Up ◽  
Planck Scale ◽  
High Energy ◽  
Magnetic Monopoles ◽  
The Earth ◽  
Parker Bound

Abstract Magnetically charged black holes (MBHs) are interesting solutions of the Standard Model and general relativity. They may possess a “hairy” electroweak-symmetric corona outside the event horizon, which speeds up their Hawking radiation and leads them to become nearly extremal on short timescales. Their masses could range from the Planck scale up to the Earth mass. We study various methods to search for primordially produced MBHs and estimate the upper limits on their abundance. We revisit the Parker bound on magnetic monopoles and show that it can be extended by several orders of magnitude using the large-scale coherent magnetic fields in Andromeda. This sets a mass-independent constraint that MBHs have an abundance less than 4 × 10−4 times that of dark matter. MBHs can also be captured in astrophysical systems like the Sun, the Earth, or neutron stars. There, they can become non-extremal either from merging with an oppositely charged MBH or absorbing nucleons. The resulting Hawking radiation can be detected as neutri- nos, photons, or heat. High-energy neutrino searches in particular can set a stronger bound than the Parker bound for some MBH masses, down to an abundance 10−7 of dark matter.

scholarly journals Searches for magnetic monopoles with IceCube

2018 ◽  
Vol 168 ◽  
pp. 04010 ◽  
Author(s):  
Anna Pollmann
Keyword(s):  
Particle Physics ◽  
Large Scale ◽  
Magnetic Monopole ◽  
High Energy ◽  
Magnetic Monopoles ◽  
Cherenkov Light ◽  
Beyond The Standard Model ◽  
Baryon Decay ◽  
Icecube Detector ◽  
Pass Through

Particles that carry a magnetic monopole charge are proposed by various theories which go beyond the Standard Model of particle physics. The expected mass of magnetic monopoles varies depending on the theory describing its origin, generally the monopole mass far exceeds those which can be created at accelerators. Magnetic monopoles gain kinetic energy in large scale galactic magnetic fields and, depending on their mass, can obtain relativistic velocities. IceCube is a high energy neutrino detector using the clear ice at the South Pole as a detection medium. As monopoles pass through this ice they produce optical light by a variety of mechanisms. With increasing velocity, they produce light by catalysis of baryon decay, luminescence in the ice associated with electronic excitations, indirect and direct Cherenkov light from the monopole track, and Cherenkov light from cascades induced by pair creation and photonuclear reactions. By searching for this light, current best limits for the monopole flux over a broad range of velocities was achieved using the IceCube detector. A review of these magnetic monopole searches is presented.

scholarly journals Grand unification magnetic monopoles inside the Earth (reply)

Nature ◽  
1981 ◽  
Vol 292 (5820) ◽  
pp. 273-273 ◽  
Author(s):  
RICHARD A. CARRIGAN
Keyword(s):  
Magnetic Monopoles ◽  
Grand Unification ◽  
The Earth

ON PRODUCTION OF MAGNETIC MONOPOLES VIA γγ FUSION AT HIGH ENERGY pp COLLISIONS

2006 ◽  
Vol 21 (38) ◽  
pp. 2873-2880 ◽  
Author(s):  
YU. KUROCHKIN ◽  
I. SATSUNKEVICH ◽  
DZ. SHOUKAVY ◽  
N. RUSAKOVICH ◽  
YU. KULCHITSKY
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
High Energy ◽  
Magnetic Monopoles ◽  
Pp Collisions ◽  
Pair Production Cross Section

We consider the production of magnetic monopoles via γγ fusion at high energy pp collisions. In the assumption that the monopole spin is equal 0, 1/2, 1, the monopole–antimonopole pair production cross-section by this mechanism at LHC energies is estimated and analyzed.

scholarly journals Indirect Searches for Dark Matter with IceCube

2019 ◽  
Vol 207 ◽  
pp. 04006
Author(s):  
Juan Antonio Aguilar Sánchez
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Gamma Rays ◽  
Direct Detection ◽  
Neutrino Telescope ◽  
The Sun ◽  
Particle Detector ◽  
Decay Products ◽  
The Earth ◽  
Modern Cosmology

The nature of dark matter remains one of the unsolved questions in modern cosmology and to understand its properties different experimental avenues are being explored. Indirect searches make use of the annihilation or decay products of dark matter as tracers to prove its existence. Unlike direct detections methods, indirect searches do not require specialized detectors as existing astro-particle experiments and facilities can be used to search for signatures of dark matter. Among the decay and annihilation products, neutrinos offer a unique way to search for dark matter since their low cross-section makes them capable of escaping from environments in which gamma rays will be absorbed, like the Sun or the Earth. The IceCube neutrino telescope is not only an excellent astro-particle detector, it also has lively program on dark matter searches with very competitive and complementary results to direct detection limits. These proceedings review the latests results of IceCube regarding the indirect search of dark matter with neutrinos.

scholarly journals Probing the Glashow resonance at electron–positron colliders

2020 ◽  
Vol 35 (13) ◽  
pp. 2050101
Author(s):  
I. Alikhanov
Keyword(s):  
Cross Section ◽  
Neutrino Flux ◽  
Cosmic Ray ◽  
High Energy ◽  
Final States ◽  
Ultra High Energy ◽  
Production Threshold ◽  
Neutrino Detectors ◽  
The Earth ◽  
Electron Positron

The Glashow resonance is a rapid enhancement of the cross-section for scattering of electron antineutrinos on electrons at the [Formula: see text] boson production threshold due to the [Formula: see text]-channel contribution. This resonance is being searched for at large volume neutrino detectors in which the reaction [Formula: see text] to be initiated by cosmic ray antineutrinos of energies about 6.3 PeV. The relatively small neutrino flux reaching the Earth together with the necessity of analyzing ultra-high-energy final states make such searches challenging. We argue here that the Glashow resonance may contribute to the process [Formula: see text]. By extending the method of the effective (equivalent) particles to the neutral leptons, we relate the distribution of the effective neutrinos in the electron to the total cross-section for [Formula: see text]. Our approach gives a good fit to the existing experimental data measured at the collider LEP at CERN and allows one to interpret these measurements as an observation of the Glashow resonance. We also discuss an advantage of future electron–positron colliders for probing the resonance.

scholarly journals The MoEDAL experiment: a new light on the high-energy frontier

2019 ◽  
Vol 377 (2161) ◽  
pp. 20190382 ◽  
Author(s):  
James L. Pinfold
Keyword(s):  
Magnetic Monopole ◽  
Magnetic Charge ◽  
High Energy ◽  
New Physics ◽  
Magnetic Monopoles ◽  
Centre Of Mass ◽  
Physics Program ◽  
8 Tev ◽  
Energy Frontier ◽  
Official Data

MoEDAL is a pioneering LHC experiment designed to search for anomalously ionizing messengers of new physics, such as the magnetic monopole. After a test run at 8 TeV centre-of-mass energy ( E cm ), it started official data taking at the LHC at an E cm of 13 TeV, in 2015. Its groundbreaking physics program defines a number of scenarios that yield potentially revolutionary insights into such foundational questions as: are there extra dimensions or new symmetries; what is the mechanism for the generation of mass; does magnetic charge exist; do topological particles exist; and what is the nature of dark matter? After a brief introduction, MoEDAL's progress to date will be reported, including its past, current and expected future physics output. Additionally, an upgrade to the MoEDAL detector consisting of two new subdetectors: MAPP (MoEDAL Apparatus for Penetrating Particles) now being prototyped at IP8; and MALL (MoEDAL Apparatus for very long-lived particles), will be presented. Finally, a possible astroparticle extension to MoEDAL, called Cosmic-MoEDAL, will be briefly described. This high altitude detector will allow the search for magnetic monopoles to be continued from the TeV scale to the GUT scale. This article is part of a discussion meeting issue ‘Topological avatars of new physics’.

Grand unification magnetic monopoles inside the Earth

Nature ◽  
1980 ◽  
Vol 288 (5789) ◽  
pp. 348-350 ◽  
Author(s):  
R. A. Carrigan
Keyword(s):  
Magnetic Monopoles ◽  
Grand Unification ◽  
The Earth

scholarly journals Grand unification magnetic monopoles inside the Earth

Nature ◽  
1981 ◽  
Vol 292 (5820) ◽  
pp. 273-273
Author(s):  
F. J. LOWES
Keyword(s):  
Magnetic Monopoles ◽  
Grand Unification ◽  
The Earth

In situ irradiation effects studies in medium- and high-voltage TEM

1995 ◽  
Vol 53 ◽  
pp. 234-235
Author(s):  
Charles W. Allen
Keyword(s):  
Cross Section ◽  
Particle Flux ◽  
Threshold Value ◽  
High Energy ◽  
Irradiation Damage ◽  
Defect Complexes ◽  
Lattice Position ◽  
Electrons And Ions ◽  
The Masses

With respect to structural consequences within a material, energetic electrons, above a threshold value of energy characteristic of a particular material, produce vacancy-interstial pairs (Frenkel pairs) by displacement of individual atoms, as illustrated for several materials in Table 1. Ion projectiles produce cascades of Frenkel pairs. Such displacement cascades result from high energy primary knock-on atoms which produce many secondary defects. These defects rearrange to form a variety of defect complexes on the time scale of tens of picoseconds following the primary displacement. A convenient measure of the extent of irradiation damage, both for electrons and ions, is the number of displacements per atom (dpa). 1 dpa means, on average, each atom in the irradiated region of material has been displaced once from its original lattice position. Displacement rate (dpa/s) is proportional to particle flux (cm-2s-1), the proportionality factor being the “displacement cross-section” σD (cm2). The cross-section σD depends mainly on the masses of target and projectile and on the kinetic energy of the projectile particle.

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