Results 41 to 50 of about 2,678 (202)

Revisiting the SN1987A gamma-ray limit on ultralight axion-like particles [PDF]

, 2014
We revise the bound from the supernova SN1987A on the coupling of ultralight axion-like particles (ALPs) to photons. In a core-collapse supernova, ALPs would be emitted via the Primakoff process, and eventually convert into gamma rays in the magnetic ...
A. Mirizzi, A. Payez, A. Payez, A. Ringwald, Alessandro Mirizzi, Alexandre Payez, ALPS collaboration, Andreas Ringwald, Carmelo Evoli, CAST collaboration, D. Horns, E.N. Alekseev, E.N. Alekseev, F. Tavecchio, G. Carosi, G.G. Raffelt, I.G. Irastorza, IAXO collaboration, J.F. Cooper, LAT collaboration, M. Meyer, M.S. Pshirkov, Maurizio Giannotti, P. Arias, R. Almy, R. Ballou, R. Jansson, S. Angus, S. Blinnikov, Tobias Fischer   +29 more
core   +1 more source

Efficient Numerical Framework for Geothermal Energy Production Optimization in Fracture‐Controlled Reservoirs

International Journal for Numerical Methods in Fluids, EarlyView.
We introduce an efficient open‐source numerical framework for the automated search for the placements of injection and production wells in hot fracture‐controlled reservoirs that sustainably optimize geothermal energy production. We model the reservoirs as discrete fracture networks in 3D. The fluid flow and heat transport in the reservoirs are modeled
Ondřej Pártl, Ernesto Meneses Rioseco
wiley   +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

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

The International Axion Observatory (IAXO) [PDF]

, 2011
The International Axion Observatory (IAXO) is a new generation axion helioscope aiming at a sensitivity to the axion-photon coupling of a few 10$^{12}$ GeV$^{-1}$, i.e. 1 - 1.5 orders of magnitude beyond the one currently achieved by CAST.
Avignone, F. T., Cantatore, G., Carmona, J. M., Caspi, S., Dafni, T., Davenport, M., Dudarev, A., Fanourakis, G., Ferrer-Ribas, E., Galan, J., Garcia, J. A., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Hoffmann, D. H. H., IAXO Collaboration, Iguaz, F. J., Irastorza, I. G., Jakovcic, K., Krcmar, M., Lakic, B., Lindner, A., Luzon, G., Papaevangelou, T., Pivovaroff, M., Raffelt, G., Redondo, J., Rodriguez, A., Russenschuck, S., Ruz, J., Shilon, I., Ten Kate, H., Tomas, A., Troitsky, S., van Bibber, K., Villar, J. A., Vogel, J., Walckiers, L., Zioutas, K.   +39 more
core   +2 more sources

Recurrent drought amplifies drought impacts and increases seasonal synchrony in mountain grassland communities

Oikos, EarlyView.
Climate change increases the recurrence of drought events with strong repercussions on grassland ecosystems. While the effects of single drought events on ecosystem structure and functioning are well understood, it is largely unknown whether and how recurrent drought events modify ecosystem responses to subsequent drought.
Lena M. Müller, Michael Bahn, Maximillian Weidle, Georg Leitinger, Dina in 't Zandt   +4 more
wiley   +1 more source

ALPINIST: Axion-Like Particles In Numerous Interactions Simulated and Tabulated

Journal of High Energy Physics, 2022
Proton beam dump experiments are among the most promising strategies to search for light and feebly interacting states such as axion-like particles (ALPs). The interpretation of these experiments is however complicated by the wide range of ALP models and
Jan Jerhot, Babette Döbrich, Fatih Ertas, Felix Kahlhoefer, Tommaso Spadaro   +4 more
doaj   +1 more source

Shifts in phenology influence synchrony of flowering plants and their pollinators along an elevation gradient

Oikos, EarlyView.
Climatic conditions alter the phenology of species, which may threaten the synchrony of biotic interactions. However, how phenological synchrony across entire communities of plants and their pollinators responds to varying environmental conditions remains poorly understood.
Mikko Tiusanen, Anna Norberg, Anna‐Liisa Laine   +2 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

Effective field theories of axion, ALP and dark photon

Journal of High Energy Physics
Abstract With the help of Young tensor technique, we enumerate the complete and independent set of effective operators up to dim-8 for the extension of the standard model with a Goldstone boson by further imposing the Adler’s zero condition in the soft momentum limit.
Huayang Song, Hao Sun, Jiang-Hao Yu
openaire   +4 more sources