Results 41 to 50 of about 862 (207)

Responses of primary producers, anoxia, and chemical feedback to Late Glacial climate change: Insights from a paired lake approach

Journal of Quaternary Science, EarlyView.
Abstract Worldwide, lacustrine ecosystems are threatened by eutrophication and deoxygenation. Both processes are driven by the combined effects of human activities and climate change. Understanding the pre‐anthropogenic nexus between warming, eutrophication, deoxygenation, and related feedback is essential to determine how lakes respond to rapid ...
Noé R.M.M. Schmidhauser, Stan J. Schouten, Petra Zahajská, Andrea Lami, Jacqueline F.N. van Leeuwen, Rik Tjallingii, Hendrik Vogel, Martin Grosjean   +7 more
wiley   +1 more source

Pulsed plasma generator as laboratory source of axions or ALPs.

, 2009
Contribution to ...
Jacoby, Joachim, Teske, Christian, Tsagri, Mary, Zioutas, Konstantin   +3 more
openaire   +2 more sources

Long‐Term Nitrogen Addition Weakens the Linkage Between Phosphorus Cycling Gene Abundance and Phosphatase Activity Through Soil Acidification in a Larix gmelinii Plantation

Land Degradation &Development, EarlyView.
ABSTRACT Anthropogenic nitrogen (N) enrichment propels global forest ecosystems toward phosphorus (P) limitation, theoretically triggering the upregulation of microbial P‐acquisition capacity to maintain stoichiometric balance. However, the extent to which N addition regulates this adaptive capacity remains uncertain.
Xiang Zhang, Qiong Zhao, Liman Wei, Su Mei, Yonghong Ma, Linhui Wu, Yuan Zhao   +6 more
wiley   +1 more source

Constraining axion and ALP dark matter from misalignment during reheating

Physical Review D, 2023
We explore the phenomenology of QCD axion and axion-like particle (ALP) dark matter production via misalignment during inflationary reheating. We investigate scenarios involving inflaton oscillating in a generic potential $\sim ϕ^n$, considering inflaton decay and annihilation for reheating.
openaire   +2 more sources

Higher-Order Corrections to the Effective Field Theory of Low-Energy Axions

, 2023
Dark matter (DM) can be composed of a collection of axions, or axion-like particles (ALPs), whose existence is due to the spontaneous breaking of the Peccei–Quinn U(1) symmetry, which is the most compelling solution of the strong CP-problem of ...
Jorge Segovia, Álvaro Duenas-Vidal, Bryan Cordero-Patino   +2 more
core   +1 more source

A TES system for ALPS II - Status and Prospects [PDF]

The Any Light Particle Search II (ALPS II) is a Light-Shining-through-a-Wall experiment operating at DESY, Hamburg. Its goal is to probe the existence of axions and axion-like particles (ALPs), possible candidates for dark matter.
Isleif, Katharina Sophie, Gimeno, José Alejandro Rubiera, Othman, Gulden, Meyer, Manuel; id_orcid, Schwemmbauer, Christina, Shah, Rikhav, Lindner, Axel, Januschek, Friederike   +7 more
core   +2 more sources

Classification of three-family flavoured DFSZ axion models that have no domain wall problem

Journal of High Energy Physics
We provide an exhaustive classification of three-family DFSZ axion models that have no cosmological domain wall problem. This result is obtained by making the Peccei-Quinn symmetry flavour dependent in certain specific ways, thus reinforcing a possible ...
Peter Cox, Matthew J. Dolan, Maaz Hayat, Andrea Thamm, Raymond R. Volkas   +4 more
doaj   +1 more source

Trait convergence under warming: drought tolerance, not thermal limits, mediates native–invader dynamics in alpine ecosystems

Oikos, EarlyView.
Climate warming and plant invasions jointly alter alpine ecosystems, but the mechanisms underlying these interactions remain unclear. A key to predicting ecosystem vulnerability is whether native and invasive species can sustain performance as conditions warm.
Indira V. Leon‐Garcia, Julie R. Deslippe   +1 more
wiley   +1 more source

The ALPs from the top: searching for long lived axion-like particles from exotic top decays

Journal of High Energy Physics, 2022
Abstract We propose a search for long lived axion-like particles (ALPs) in exotic top decays. Flavour-violating ALPs appear as low energy effective theories for various new physics scenarios such as t-channel dark sectors or Froggatt-Nielsen models. In this case the top quark may decay to an ALP and an up- or charm-quark.
Adrian Carmona, Fatemeh Elahi, Christiane Scherb, Pedro Schwaller   +3 more
openaire   +4 more sources

Extra-dimensional axion expectations

Journal of High Energy Physics
Axions arising as modes of higher-dimensional gauge fields are known to offer a compelling solution to the axion quality problem and to naturally arise in string theory.
Matthew Reece
doaj   +1 more source