Results 51 to 60 of about 2,018,508 (172)

Muon Pair Production by Electron-Photon Scatterings [PDF]

open access: yes, 2001
The cross section for muon pair productions by electrons scattering over photons, $\sigma_{MPP}$, is calculated analytically in the leading order. It is pointed out that for the center-of-mass energy range, $s \geq 5 m^{2}_{\mu}$, the cross section for $\
A. Kusenko   +7 more
core   +2 more sources

The Filament Rift: ΛCDM’s Structural Challenge against Observation

open access: yesThe Astrophysical Journal
This study presents the first extended comparison of cosmic filaments identified in Sloan Digital Sky Survey (SDSS) DR10 observations ( z  
Saeed Tavasoli, Parsa Ghafour
doaj   +1 more source

High energy gamma ray astronomy [PDF]

open access: yes
High energy gamma ray astronomy has evolved with the space age. Nonexistent twenty-five years ago, there is now a general sketch of the gamma ray sky which should develop into a detailed picture with the results expected to be forthcoming over the next ...
Fichtel, Carl E.
core   +4 more sources

High Energy Cosmic Neutrinos [PDF]

open access: yes, 1999
While the general principles of high-energy neutrino detection have been understood for many years, the deep, remote geographical locations of suitable detector sites have challenged the ingenuity of experimentalists, who have confronted unusual ...
Barwick, Steven W.
core   +2 more sources

Soft bootstrap and effective field theories

open access: yesJournal of High Energy Physics, 2019
The soft bootstrap program aims to construct consistent effective field theories (EFT’s) by recursively imposing the desired soft limit on tree-level scattering amplitudes through on-shell recursion relations.
Ian Low, Zhewei Yin
doaj   +1 more source

Intersecting surface defects and instanton partition functions

open access: yesJournal of High Energy Physics, 2017
We analyze intersecting surface defects inserted in interacting four-dimensional N = 2 $$ \mathcal{N}=2 $$ supersymmetric quantum field theories. We employ the realization of a class of such systems as the infrared fixed points of renormalization group ...
Yiwen Pan, Wolfger Peelaers
doaj   +1 more source

High Energy Cosmic Neutrinos Astronomy: The ANTARES Project [PDF]

open access: yes, 1998
Neutrinos may offer a unique opportunity to explore the far Universe at high energy. The ANTARES collaboration aims at building a large undersea neutrino detector able to observe astrophysical sources (AGNs, X-ray binary systems, ...) and to study ...
Basa, S.
core   +2 more sources

Results of MAGIC on Galactic sources

open access: yes, 2008
MAGIC is a single-dish Cherenkov telescope located on La Palma (Spain), hence with an optimal view on the Northern sky. Sensitive in the 30 GeV-30 TeV energy band, it is nowadays the only ground-based instrument being able to measure high-energy gamma ...
Felix A. Aharonian   +4 more
core   +2 more sources

Chiral algebras, localization and surface defects

open access: yesJournal of High Energy Physics, 2018
Four-dimensional N $$ \mathcal{N} $$ = 2 superconformal quantum field theories contain a subsector carrying the structure of a chiral algebra. Using localization techniques, we show for the free hypermultiplet that this structure can be accessed directly
Yiwen Pan, Wolfger Peelaers
doaj   +1 more source

Testing loop quantum gravity by quasi-periodic oscillations: rotating blackholes

open access: yesEuropean Physical Journal C: Particles and Fields
We investigate a compelling model of a rotating black hole that is deformed by the effects of loop quantum gravity (LQG). We present a simplified metric and explore two distinct geometries: one in which the masses of the black hole and white hole are ...
Jafar Khodagholizadeh   +3 more
doaj   +1 more source

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