Results 31 to 40 of about 309,241 (282)

New physics, the cosmic ray spectrum knee, and $pp$ cross section measurements

, 2010
We explore the possibility that a new physics interaction can provide an explanation for the knee just above $10^6$ GeV in the cosmic ray spectrum. We model the new physics modifications to the total proton-proton cross section with an incoherent term ...
A.B. Kaidalov, Aparna Dixit, C. Amsler, D. Cline, D. Kazanas, Douglas W. McKay, E. Eichten, F. Halzen, F. Halzen, G. Kulikov, J. Blümer, K. Österberg, L. Anchordoqui, L. Durand, L. Durand, M. Amenomori, M. Honda, M. Masip, M.M. Block, M.M. Block, M.M. Block, M.M. Block, M.M. Block, M.M. Block, M.M. Block, N. Antoniou, N.N. Kalmykov, Pankaj Jain, Parama Mukherjee, R. Barcelo’, R. Durand, R. Wigmans, R.J. Glauber, R.M. Baltrusaitis, R.S. Fletcher, S. Ellis, S. Nikolsky, T. Gaisser, T.K. Gaisser, V. Barger   +39 more
core   +1 more source

Extreme Value Analysis of Ground Magnetometer Observations at Valentia Observatory, Ireland

Space Weather, 2023
Understanding global space weather effects is of great importance to the international scientific community, but more localized space weather predictions are important on a national level.
Alexandra Ruth Fogg, C. M. Jackman, J. Malone‐Leigh, P. T. Gallagher, A. W. Smith, M. Lester, M.‐T. Walach, J. E. Waters   +7 more
doaj   +1 more source

Neutrinos And Big Bang Nucleosynthesis [PDF]

, 2012
According to the standard models of particle physics and cosmology, there should be a background of cosmic neutrinos in the present Universe, similar to the cosmic microwave photon background.
Steigman, Gary
core   +4 more sources

Solution Of Wheeler-De Witt Equation, Potential Well And Tunnel Effect

, 2007
This paper uses the relation of the cosmic scale factor and scalar field to solve Wheeler-DeWitt equation, gives the tunnel effect of the cosmic scale factor a and quantum potential well of scalar field, and makes it fit with the physics of cosmic ...
A. Linde, A. Linde, D.H. Zhang, D.L. Wiltshire, E.W. Kolb, Gang Weng, J.A. Wheeler, P.J.E. Peebles, Y.G. Shen, Yong-Chang Huang   +9 more
core   +1 more source

Sun-to-Mud observations of the May and October storms of 2024: impacts on Ireland’s Space Weather

Journal of Space Weather and Space Climate
Near the peak of Solar Cycle 25 in 2024, Earth was impacted by two major solar eruptive events which triggered dramatic geomagnetic storm activity. In May 2024, multiple solar eruptive events generated the largest geomagnetic storm since the early 2000s;
Fogg Alexandra Ruth, Lucas Amy R., Hayes Laura A., Ivanov Serhii M., Walker Simon J., Malone-Leigh John, Murray Sophie A., Leahy Sadhbh R., Jackman Caitríona M., Gallagher Peter T.   +9 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

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

Testing Fundamental Physics with High-Energy Cosmic Rays [PDF]

, 2000
Cosmic rays may provide opportunities for probing fundamental physics. For example, ultra-high-energy cosmic rays might originate from the decays of metastable heavy particles, and astrophysical gamma rays can be used to test models of quantum gravity ...
Ellis, John
core   +1 more source

Cosmic-ray physics with IceCube

, 2011
IceCube as a three-dimensional air-shower array covers an energy range of the cosmic-ray spectrum from below 1 PeV to approximately 1 EeV. This talk is a brief review of the function and goals of IceTop, the surface component of the IceCube neutrino ...
Ahn, Apanasenko, Asakimori, Desiati, Etchegoyen, IceCube Collaboration, IceCube Collaboration, IceCube Collaboration, IceCube Collaboration, IceCube Collaboration, IceCube Collaboration, Kopenkin, Panov, Thomas K. Gaisser   +13 more
core   +1 more source

Raman Microscopy at the Organic–Inorganic Interfaces in Human Calcified Aortic Valves Shows the Co‐Existence of Whitlockite Crystals and Carbonated Hydroxyapatite‐Mineralized Collagen Fibrils

Advanced Functional Materials, EarlyView.
This study advances our understanding of aortic valve stenosis by capturing spatially resolved chemical and structural changes at the nanoscale. The findings highlight the potential of combined Raman and electron microscopy for understanding calcification mechanisms across diverse tissue types.
Robin H. M. Van der Meijden, Carolien T. A Kuster, Amber van Broekhoven, Raphaela Allgayer, Luco Rutten, Rona Roverts, Marta Cerruti, Elena Macías‐Sánchez, Jan Hein Cornel, Salloua el Messaoudi, Anat Akiva, Nico Sommerdijk   +11 more
wiley   +1 more source