Results 71 to 80 of about 4,135 (229)

Grand Color axion

Journal of High Energy Physics, 2022
We present a model that solves the strong CP problem via an axion parametrically heavier than the standard one. Within this picture the Standard Model quarks are embedded into a larger non-abelian Grand Color group that at high scales splits into ...
Alessandro Valenti, Luca Vecchi, Ling-Xiao Xu   +2 more
doaj   +1 more source

Energetic axion-like particle production in galaxies

, 2011
Relativistic axion-like particles (ALPs) originating from the stellar interiors, along with the ones coming from photon-ALP mixing in the galactic magnetic fields, contribute together to make an energetic component of the ALP content of the universe ...
Eleftheriadis, Christos, Liolios, Anastasios, Manousos, Athanasios   +2 more
core   +1 more source

Origin, evolution and biogeographic dynamics of the European rabbit (Oryctolagus cuniculus) in Southwestern Europe

The Anatomical Record, EarlyView.
Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley   +1 more source

Solutions to axion electromagnetodynamics and new search strategies of sub-μeV axion

Journal of High Energy Physics, 2023
The Witten effect implies the electromagnetic interactions between axions and magnetic monopoles, and the quantum electromagnetodynamics (QEMD) properly describes interactions of electric charges, magnetic charges and photons.
Tong Li, Rui-Jia Zhang, Chang-Jie Dai
doaj   +1 more source

Macro‐ and microclimate interactively shape species diversity of multiple taxa in mountain landscapes

Ecography, EarlyView.
Macroclimate is a key driver of biodiversity, but habitat conditions can modulate the local microclimate by amplifying or buffering macroclimatic temperatures. The interplay between microclimatic modulation and macroclimatic temperature is crucial for shaping local biodiversity in a warming world, but remains poorly understood across life forms.
Lisa Samira Geres, Tobias Richter, Rupert Seidl, Sebastian König, Anne Chao, Chun‐Huo Chiu, Mareike Kortmann, Oliver Mitesser, Jörg Müller, Julia Rothacher, Claus Bässler, Sebastian Seibold   +11 more
wiley   +1 more source

The axion-photon mixing in non-linear electrodynamic scenarios

Journal of High Energy Physics, 2022
In this contribution, we re-assess some aspects of axionic electrodynamics by coupling non-linear electromagnetic effects to axion physics. We present a number of motivations to justify the coupling of the axion to the photon in terms of a general non ...
J. M. A. Paixão, L. P. R. Ospedal, M. J. Neves, J. A. Helayël-Neto   +3 more
doaj   +1 more source

Unveiling the Crystal Structure of Sanidine: A Polarized Raman and Ab Initio Simulation Exploration

Journal of Raman Spectroscopy, EarlyView.
This study combines polarized Raman spectroscopy and ab initio calculations to assign theoretical vibrational modes to observed spectra. Polarized Raman spectra were collected in six geometries (40–1200 cm−1). Theoretical predictions via DFT show good agreement with experiments, though some discrepancies point to influences like trace elements and ...
Michele Cassetta, Luca Bellucci, Sabrina Nazzareni, Francesco Vetere, Marco Giarola, Gino Mariotto   +5 more
wiley   +1 more source

Coherent Detection of Ultra-weak Electromagnetic Fields

, 2018
We explore the application of heterodyne interferometry for a weak-field coherent detection scheme. The methods detailed here will be used in ALPS II, an experiment designed to search for weakly-interacting, sub-eV particles.
Barke, Simon, Bush, Zachary R., Hallal, Ayman, Hollis, Harold, Messineo, Giuseppe, Mueller, Guido, Spector, Aaron D., Tanner, D. B.   +7 more
core   +1 more source

Automatic determination of glymphatic flow with the DTI‐ALPS‐index along the principal axis system in native imaging space corrects for head and fiber orientation

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose The aim of this work is to make the DTI along the perivascular space (DTI‐ALPS‐index) more robust with respect to region selection and the orientation of the head and fibers. We propose to address this matter by using the principal diffusion directions and an automated, atlas‐based region of interest (ROI) placement.
Ali Ajouz, Olav Jansen, Lynn Johann Frohwein, Svea Seehafer, Naomi Larsen, Jan‐Bernd Hövener   +5 more
wiley   +1 more source

Composite ALPs in Composite Higgs Models

Journal of High Energy Physics
We study the effective Lagrangian for the Axion-Like Particle (ALP) arising in a class of composite Higgs models. We discuss the peculiarities of the coupling to the quark sector specific of these models, including flavor violating terms.
Gabriele Ferretti
doaj   +1 more source