Results 111 to 120 of about 4,135 (229)

Terrestrial axion/ALP searches

, 2018
X-ray astronomy and fundamental physics, Newport Pagnell, United Kingdom, 24 Oct 2018 - 25 Oct ...
openaire   +2 more sources

Breeding habitat preferences and niche partitioning of insectivorous songbirds in Alpine grasslands

Ibis, EarlyView.
Alpine grasslands are increasingly facing pressures of climate and land‐use changes. Higher temperatures and pastoral abandonment lead to treeline shift and to bush encroachment, while agricultural intensification causes soil eutrophication and landscape homogenization. Alpine grasslands in Europe host important populations of mountain specialists that
Yann Rime, Pius Korner, Barbara Helm, Valentin Amrhein, Christoph M. Meier   +4 more
wiley   +1 more source

Searches for heavy QCD axions via dimuon final states

Journal of High Energy Physics, 2023
Heavy QCD axions are well-motivated extensions of the QCD axion that address the quality problem while still solving the strong CP problem. Owing to the gluon coupling, critical for solving the strong CP problem, these axions can be produced in ...
Raymond T. Co, Soubhik Kumar, Zhen Liu
doaj   +1 more source

Evolutionary history and interspecific gene flow in six Coenonympha butterfly species in Europe Histoire évolutive et flux de gène entre six espèces de papillons du genre Coenonympha en Europe

Insect Conservation and Diversity, EarlyView.
We analysed genomic data from six closely related Coenonympha butterflies to explore their diversification history across Europe. Despite widespread secondary gene flow, the six species remain genetically distinct, even in areas where their distribution ranges overlap.
Thibaud Camizuli, Matthew Greenwood, Delphine Rioux, Elena Zakharova, Laurence Després   +4 more
wiley   +1 more source

Vacuum metastability from Axion-Higgs criticality

Journal of High Energy Physics
Self-organised criticality, realised through cosmological dynamics in the early universe, is an alternative paradigm for addressing the electroweak hierarchy problem.
Maximilian Detering, Tevong You
doaj   +1 more source

Disentangling Atmospheric and Water Shortage Stresses Is Key to Anticipate Forest Dynamics With Climate Change

Journal of Biogeography, EarlyView.
ABSTRACT Aim Studies assessing changes in vegetation with climate change have not separated atmospheric and water shortage stresses, although they drive different vegetation patterns in relation to continentality, water balance and bedrock types. We aim to assess how these two stresses will likely impact forest communities.
Richard Michalet, Benjamin Roux, Jean‐Paul Maalouf, Philippe Choler   +3 more
wiley   +1 more source

Axion production in the η → ππa decay within SU(3) chiral perturbation theory

Journal of High Energy Physics
We study the axion and axion-like particle production from the η → ππa decay within the SU(3) chiral perturbation theory up to the one-loop level. The conventional SU(3) chiral low energy constants are found to be able to reabsorb all the divergences ...
Jin-Bao Wang, Zhi-Hui Guo, Zhun Lu, Hai-Qing Zhou   +3 more
doaj   +1 more source

Cosmological bounds on pseudo Nambu-Goldstone bosons

, 2012
We review the cosmological implications of a relic population of pseudo Nambu-Goldstone bosons (pNGB) with an anomalous coupling to two photons, often called axion-like particles (ALPs).
, D. Cadamuro, D. Fixsen, Davide Cadamuro, E.W. Kolb, G. Vertongen, G.G. Raffelt, J. Hamann, J. Hamann, Javier Redondo, P. Arias ., Particle Data Group collaboration, R.H. Cyburt ., S. Dodelson, S. Sarkar, S. Seager, WMAP collaboration   +16 more
core   +1 more source

Axion-like particle (ALP) portal freeze-in dark matter confronting ALP search experiments

Journal of High Energy Physics
Abstract The relic density of Dark Matter (DM) in the freeze-in scenario is highly dependent on the evolution history of the universe and changes significantly in a non-standard (NS) cosmological framework prior to Big Bang Nucleosynthesis (BBN). In this scenario, an additional species dominates the energy budget of the universe at
Dilip Kumar Ghosh, Anish Ghoshal, Sk Jeesun   +2 more
openaire   +3 more sources

Island Life and Interspecific Dynamics Influence Body Size, Distribution and Ecological Niche of Long‐Eared Bats

Journal of Biogeography, EarlyView.
ABSTRACT Aims Island ecosystems represent a paramount opportunity to investigate interspecific interactions and ecological niche dynamics under constrained conditions. This study investigates how insularity and species coexistence influence the spatial distribution, ecological niche differentiation, and morphological adaptations of long‐eared bats ...
Luciano Bosso, Gaetano Fichera, Mauro Mucedda, Ermanno Pidinchedda, Michael Veith, Sonia Smeraldo, Pier Paolo De Pasquale, Emiliano Mori, Leonardo Ancillotto   +8 more
wiley   +1 more source