Results 131 to 140 of about 1,662,373 (351)

Very-high-energy gamma-ray astronomy

The European Physical Journal Special Topics, 2022
D. Bose, V. Chitnis
semanticscholar   +1 more source

Low‐Loss Parowax‐Imprinted Diffractive Neural Network for Orbital Angular Momentum Terahertz Holographic Imaging

Advanced Photonics Research, EarlyView.
This work introduces a low‐loss diffractive neural network, fabricated using an imprinting technique with parowax material, for recognizing and manipulating the topological charge of orbital angular momentum (OAM) waves. It is also demonstrated that the low‐loss diffractive network can perform mathematical operations based on the topological charges of
Wei Jia, Miguel A. Gomez, Steve Blair, Michael A. Scarpulla, Berardi Sensale‐Rodriguez   +4 more
wiley   +1 more source

A Pythagoras-like theorem for CP violation in neutrino oscillations

Physics Letters B, 2023
The probabilities of νμ→νe and ν‾μ→ν‾e oscillations in vacuum are determined by the CP-conserving flavor mixing factors Rij≡Re(UμiUejUμj⁎Uei⁎) and the universal Jarlskog invariant of CP violation Jν≡(−1)i+jIm(UμiUejUμj⁎Uei⁎) (for i,j=1,2,3 and ...
Shu Luo, Zhi-zhong Xing
doaj  

Journey of X-ray astronomy: Indian perspectives [PDF]

arXiv
X-ray astronomy is a mature area of observational astronomy. After the discovery of the first non-solar X-ray source in 1962, X-ray astronomy proliferated during the Apollo era's space race. Then, it matured as an established area of research during the period of Great Observatories, and now it has become an indispensable tool to understand a wide ...
arxiv  

Astronomy in Argentina [PDF]

arXiv, 2012
This article analyses the current state of Astronomy in Argentina and describes its origins. We briefly describe the institutions where astronomical research takes place, the observational facilities available, the training of staff and professionals, and the role of the institutions in scientific promotion.
arxiv  

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research, EarlyView.
This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
wiley   +1 more source

Progress, challenges, and future steps in data assimilation for convection‐permitting numerical weather prediction: Report on the virtual meeting held on 10 and 12 November 2021

Atmospheric Science Letters, Volume 24, Issue 1, January 2023., 2023
We report on a meeting on progress and challenges in convection‐permitting data assimilation. Novel developments include the assimilation of novel observations such as cloud‐affected satellite radiances, ground‐based profiling networks and aircraft data, as well as methodological advancements in error covariance modelling, and progress in operational ...
Guannan Hu, Sarah L. Dance, Ross N. Bannister, Hristo G. Chipilski, Oliver Guillet, Bruce Macpherson, Martin Weissmann, Nusrat Yussouf   +7 more
wiley   +1 more source

Enhanced four-body decays of charged Higgs bosons into off-shell pseudoscalar Higgs and $$W^\pm $$ W ± boson pairs in a lepton-specific 2-Higgs doublet model

European Physical Journal C: Particles and Fields
We study the time-honoured decay $$H^\pm \rightarrow A W^\pm $$ H ± → A W ± but for the first time, we do so for the case of both A and $$W^\pm $$ W ± being off-shell, therefore computing a $$1\rightarrow 4$$ 1 → 4 body decay.
Stefano Moretti, Muyuan Song
doaj   +1 more source

The CAT imaging telescope for very-high-energy gamma-ray astronomy [PDF]

, 1998
Aurélien Barrau, R. Bazer‐Bachi, E. Beyer, H. Cabot, M. Cerutti, L.‐M. Chounet, G. Debiais, B. Degrange, H. Delchini, J.P. Denance, G. Descotes, J. P. Dezalay, A. Djannati-Ataı̈, D. Dumora, P. Espigat, B. Fabre, P. Fleury, G. Fontaine, R. George, C. Ghesquière, J. Gilly, P. Goret, C. Gouiffès, J.-C. Gouillaud, C. Grégory, I. A. Grenier, L. Iacoucci, L. Kalt, S. Le Bohec, Isabelle Malet, C. Meynadier, J.P. Mols, P. Mora de Freitas, R. Morano, G. Morinaud, F. Münz, M. Palatka, T. Palfrey, E. Paré, Y. Pons, M. Punch, J. Québert, K. Ragan, C. Renault, M. Rivoal, L. Rob, P. Schovánek, D. A. Smith, A. Tabary, J.‐P. Tavernet, F. Toussenel, J. Vrána   +51 more
openalex   +1 more source

High energy neutrino astronomy with KM3NeT

Journal of Physics: Conference Series, 2020
Abstract The KM3NeT Collaboration aims at the observation of high neutrino sources in the Universe and at the determination of the neutrino mass hierarchy. This talk is focused on ARCA. The deployment of the first Detection Units at 3500 m depth offshore CapoPassero (Italy) started and two are in operation.
openaire   +2 more sources