Results 1 to 10 of about 6,586 (50)
GRB 181110A: Constraining the Jet Structure, Circumburst Medium and the Initial Lorentz Factor
Universe, 2022 The afterglow data of gamma ray bursts (GRBs) can be used to constrain the physical properties of the fireball (e.g., the jet structure and opening angle) and the circumburst medium.
Song Han +6 more
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An Unsupervised Machine Learning Method for Electron–Proton Discrimination of the DAMPE Experiment
Universe, 2022 Galactic cosmic rays are mostly made up of energetic nuclei, with less than 1% of electrons (and positrons). Precise measurement of the electron and positron component requires a very efficient method to reject the nuclei background, mainly protons.
Zhihui Xu +6 more
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Constraints on dark matter annihilation from the Event Horizon Telescope observations of M87*
Journal of High Energy Physics, 2022 The fast developments of radio astronomy open a new window to explore the properties of Dark Matter (DM). The recent direct imaging of the supermassive black hole (SMBH) at the center of M87 radio galaxy by the Event Horizon Telescope (EHT) collaboration
Guan-Wen Yuan +6 more
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Global QCD analysis and dark photons
Journal of High Energy Physics, 2023 We perform a global QCD analysis of high energy scattering data within the JAM Monte Carlo framework, including a coupling to a dark photon that augments the Standard Model (SM) electroweak coupling via kinetic mixing with the hypercharge B boson.
N. T. Hunt-Smith +6 more
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Quasi-Periodic Pulsations in an M-Class Solar Flare
Universe, 2023 We have studied the quasi-periodic pulsations (QPPs) of the M2.3 flare that occurred in the active region NOAA 12172 on 23 September 2014. Through the fast Fourier transform (FFT) method, we decompose the flare light curves into fast- and slowly-varying ...
Jun Xu +3 more
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Has the origin of the third-family fermion masses been determined?
Journal of High Energy Physics, 2021 Precision measurements of the Higgs couplings are, for the first time, directly probing the mechanism of fermion mass generation. The purpose of this work is to determine to what extent these measurements can distinguish between the tree-level mechanism ...
Michael J. Baker +2 more
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A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone
Nature Communications, 2021 Galactic center is one of the most important cosmic-ray sources. Here, the authors show GeV-TeV cosmic ray density in the central molecular zone is lower than the cosmic ray sea component, suggesting presence of high energy particle accelerator at the ...
Xiaoyuan Huang, Qiang Yuan, Yi-Zhong Fan
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Constraining Dark Boson Decay Using Neutron Stars
Universe, 2023 Inspired by the well-known anomaly in the lifetime of the neutron, we investigated its consequences inside neutron stars. We first assessed the viability of the neutron decay hypothesis suggested by Fornal and Grinstein within neutron stars, in terms of ...
Wasif Husain +2 more
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Combining outlier analysis algorithms to identify new physics at the LHC
Journal of High Energy Physics, 2021 The lack of evidence for new physics at the Large Hadron Collider so far has prompted the development of model-independent search techniques. In this study, we compare the anomaly scores of a variety of anomaly detection techniques: an isolation forest ...
Melissa van Beekveld +9 more
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Radiative muon mass models and (g − 2) μ
Journal of High Energy Physics, 2021 Recent measurements of the Higgs-muon coupling are directly probing muon mass generation for the first time. We classify minimal models with a one-loop radiative mass mechanism and show that benchmark models are consistent with current experimental ...
Michael J. Baker +2 more
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