Results 81 to 90 of about 838,240 (250)

The frontiers of the virtual photons program at MAMI

EPJ Web of Conferences, 2012
The most recent results and the future physics program of the high precision electron-scattering experiment at MAMI are briefly outlined. The A1 high-resolution spectrometers facility allows for a unique quality of virtual photon experiments.
Schlimme B. S., Sanchez Lorente A., Sànchez Majos S., Saito T., Pochodzalla J., Nakamura S. N., Nagao S., Nungesser L., Müller U., Molitor M., Middleton D. G., Merkel H., Hirose S., Hashimoto H, Mar Gòmez Rodríguez, Gogami T., Fujii Y., Friščic I., Fonvieille H., Esser A., Distler M. O., Denig A., Debenjak L., Bosnar D., Böhm R., Ayerbe Gayoso C., Achenbach P., Sfienti C., Schoth M., Schulz F., Širca S., Tang L., Thiel M., Tsukada K., Walcher T.   +34 more
doaj   +1 more source

Gravitational wave signatures from domain wall and strong first-order phase transitions in a two complex scalar extension of the Standard Model

Journal of High Energy Physics, 2021
We consider a simple extension of Standard Model by adding two complex singlet scalars with a U(1) symmetry. A discrete Z 2 × Z 2 ′ $$ {\mathcal{Z}}_2\times {\mathcal{Z}}_2^{\prime } $$ symmetry is imposed in the model and the added scalars acquire a non
Avik Paul, Upala Mukhopadhyay, Debasish Majumdar   +2 more
doaj   +1 more source

Astrophysical origin of high-energy cosmic neutrinos

EPJ Web of Conferences, 2015
The origin of high-energy cosmic neutrinos is a new interesting mystery in astroparticle physics. The present data suggest interesting connection to cosmic-ray and/or gamma-ray sources.
Murase Kohta
doaj   +1 more source

The Plasma Proton Environment Within Saturn's F‐G Ring Gap as Observed by the Cassini Plasma Spectrometer Ion Mass Spectrometer During Saturn Orbit Insertion

Journal of Geophysical Research: Space Physics, Volume 130, Issue 2, February 2025.
Abstract We report on the detection of protons and the potential detection of H2+ between Saturn's F and G rings based on Cassini Plasma Spectrometer (CAPS) Ion Mass Spectrometer (IMS) time‐of‐flight (TOF) composition measurements acquired during Saturn Orbit Insertion (SOI) outbound pass. The range in dipole L shell is 2.3 < L < 2.8.
E. C. Sittler Jr., A. K. Woodson, R. E. Johnson, J. F. Cooper, W.‐L. Tseng, S. J. Sturner, D. J. Chornay, H. T. Smith, D. G. Simpson, D. B. Reisenfeld   +9 more
wiley   +1 more source

What do we expect to learn from γ-beam experiments related to nuclear astrophysics at ELI-NP? [PDF]

EPJ Web of Conferences
This paper addresses some of the of open problems in photonuclear physics which await to be resolved using high-brilliance γ-ray beams, such as precise measurements of total or partial cross sections of photonuclear reactions related to astroparticle ...
Balabanski Dimiter L.
doaj   +1 more source

Addressing the high-f problem in pseudo-Nambu–Goldstone boson dark energy models with dark matter–dark energy interaction

European Physical Journal C: Particles and Fields, 2020
We consider a dark energy scenario driven by a scalar field $$\phi $$ ϕ with a pseudo-Nambu–Goldstone boson (pNGB) type potential $$V(\phi )=\mu ^4 \left( 1+ \mathrm{cos}(\phi /f) \right) $$ V ( ϕ ) = μ 4 1 + cos ( ϕ / f ) .
Upala Mukhopadhyay, Avik Paul, Debasish Majumdar   +2 more
doaj   +1 more source

Multi‐Photon 3D Laser Micro‐Printed Plastic Scintillators for Applications in Low‐Energy Particle Physics

Advanced Functional Materials, Volume 35, Issue 2, January 9, 2025.
Many modern detector systems require structured scintillators in combination with photo‐detectors. This requirement can be fulfilled by 3D printing plastic scintillators which becomes more and more relevant. However, the resolution and surface quality of 1‐photon‐based 3D printing techniques are not sufficient for many applications.
Jannis Weinacker, Sebastian Kalt, Anton Huber, Nathanael Gutknecht, Jonathan Ludwig Günter Schneider, Niclas Maximilian Bojanowski, Tom Geigle, Markus Steidl, Martin Wegener   +8 more
wiley   +1 more source

The KASCADE Cosmic-ray Data Centre KCDC: granting open access to astroparticle physics research data

European Physical Journal C: Particles and Fields, 2018
The ‘KASCADE Cosmic ray Data Centre’ is a web portal (https://kcdc.ikp.kit.edu), where the data of the astroparticle physics experiment KASCADE-Grande are made available for the interested public.
A. Haungs, D. Kang, S. Schoo, D. Wochele, J. Wochele, W. D. Apel, J. C. Arteaga-Velázquez, K. Bekk, M. Bertaina, J. Blümer, H. Bozdog, I. M. Brancus, E. Cantoni, A. Chiavassa, F. Cossavella, K. Daumiller, V. de Souza, F. Di Pierro, P. Doll, R. Engel, B. Fuchs, D. Fuhrmann, A. Gherghel-Lascu, H. J. Gils, R. Glasstetter, C. Grupen, D. Heck, J. R. Hörandel, T. Huege, K. H. Kampert, H. O. Klages, K. Link, P. Łuczak, H. J. Mathes, H. J. Mayer, J. Milke, B. Mitrica, C. Morello, J. Oehlschläger, S. Ostapchenko, M. Petcu, T. Pierog, H. Rebel, M. Roth, H. Schieler, F. G. Schröder, O. Sima, G. Toma, G. C. Trinchero, H. Ulrich, A. Weindl, J. Zabierowski   +51 more
doaj   +1 more source

Astroparticle physics obtaining more attention from a new type of audience

Journal of Physics: Conference Series, 2021
Cosmic-ray muography is a group of density-imaging techniques based on directional measurements of muon attenuation in liquid or solid media. The foundations of this emerging multidisciplinary research field were already laid in the 1950s-1970s, but the ...
M. Holma, J. Joutsenvaara, P. Kuusiniemi
semanticscholar   +1 more source

THE IMPACT OF SUZAKU MEASUREMENTS ON ASTROPARTICLE PHYSICS

Acta Polytechnica, 2013
Results from the Suzaku X-ray broad-band observations of clusters of galaxies are summarized. Aiming at understanding the physics of gas heating/particle acceleration and the cluster dynamical evolution, we search for non-thermal hard X-ray emission from
Naomi Ota
doaj   +1 more source