Results 71 to 80 of about 4,122 (216)

QCD perturbation theory at low energies

Physical Review Letters, 1992
We apply the optimization procedure based on the Principle of Minimal Sensitivity to the third-order calculation of $\R$. The effective couplant remains finite, freezing to a value $ _s/ = 0.26$ at low energies. Using Poggio-Quinn-Weinberg smearing we find good agreement between theory and experiment right down to zero energy.
Mattingly, A. C., Stevenson, P. M.
openaire   +3 more sources

Holographic Duals of Symmetry Broken Phases

Fortschritte der Physik, Volume 72, Issue 12, December 2024.
Abstract A novel interpretation of Symmetry Topological Field Theories (SymTFTs) as theories of gravity is explored by proposing a holographic duality where the bulk SymTFT (with the gauging of a suitable Lagrangian algebra) is dual to the universal effective field theory (EFT) that describes spontaneous symmetry breaking on the boundary.
Andrea Antinucci, Francesco Benini, Giovanni Rizi   +2 more
wiley   +1 more source

Prompt neutrinos and intrinsic charm at SHiP

Journal of High Energy Physics, 2019
We present a new evaluation of the far-forward neutrino plus antineutrino flux and number of events from charm hadron decays in a 400 GeV proton beam dump experiment like the Search for Hidden Particles (SHiP).
Weidong Bai, Mary Hall Reno
doaj   +1 more source

Analysing the impacts of extreme torrential events using multi‐temporal LiDAR datasets—The Schöttlbach catchment, Upper Styria, Austria

Earth Surface Processes and Landforms, Volume 49, Issue 9, Page 2809-2824, July 2024.
The Schöttlbach catchment recorded two major flood events in July 2011 and August 2017. On the basis of reports, geomorphic mapping and the analysis of multi‐temporal LiDAR datasets, we tried to analyse the impacts on the local geomorphic system and constructed an event‐scaled sediment budget for the 2017 event. Abstract Extreme precipitation events in
Paul Krenn, Nicole Kamp, Stefanie Peßenteiner, Oliver Sass   +3 more
wiley   +1 more source

Machine learning bias correction and downscaling of urban heatwave temperature predictions from kilometre to hectometre scale

Meteorological Applications, Volume 31, Issue 3, May/June 2024.
Using conventional weather models, it is both difficult and computationally expensive to accurately simulate the urban heat island (UHI) at neighbourhood scale. We use machine learning to bias correct and downscale air temperature (T) predictions made by the Met Office operational regional forecast model to 100 m horizontal grid length over London, UK.
Lewis P. Blunn, Flynn Ames, Hannah L. Croad, Adam Gainford, Ieuan Higgs, Mathew Lipson, Chun Hay Brian Lo   +6 more
wiley   +1 more source

Revisiting $$B\rightarrow K^*\pi $$ B → K ∗ π and $$B\rightarrow K\rho $$ B → K ρ decays using the modified perturbative QCD approach

European Physical Journal C: Particles and Fields
We revisit $$B\rightarrow K^*\pi $$ B → K ∗ π and $$B\rightarrow K\rho $$ B → K ρ decay processes using the modified perturbative QCD approach, which is developed based on the perturbative QCD approach with a few improvements.
Ru-Xuan Wang, Mao-Zhi Yang
doaj   +1 more source

Holographic CBK relation

Physics Letters B, 2018
The Crewther–Broadhurst–Kataev (CBK) relation connects the Bjorken function for deep-inelastic sum rules (or the Gross–Llewellyn Smith function) with the Adler function for electron–positron annihilation in QCD; it has been checked to hold up to four ...
Gregory Gabadadze, Giorgi Tukhashvili
doaj   +1 more source

Sensitivity of Resonant Axion Haloscopes to Quantum Electromagnetodynamics

Annalen der Physik, Volume 536, Issue 1, January 2024.
The axion is a well‐motivated particle, which can also explain the existence of dark matter. Furthermore, if magnetic monopoles exist, interactions of electromagnetic fields with axions will be expanded from one parameter to three. In this article, new ways to search for axions are determined and a possible indirect way to determine if magnetically ...
Michael E. Tobar, Catriona A. Thomson, Benjamin T. McAllister, Maxim Goryachev, Anton V. Sokolov, Andreas Ringwald   +5 more
wiley   +1 more source

A new determination of higher-order QCD corrections to hadronic τ decays

Physics Letters B
We employ Levin-type sequence transformations to accelerate the convergence of the perturbative fixed-order expansion of the QCD correction δ(0) in terms of the strong coupling αs.
Gauhar Abbas, Vartika Singh
doaj   +1 more source

Limits on Dark Photons, Scalars, and Axion‐Electromagnetodynamics with the ORGAN Experiment

Annalen der Physik, Volume 536, Issue 1, January 2024.
The nature of dark matter is one of the biggest mysteries in the Universe. ORGAN is an experiment which seeks to understand dark matter by figuring out what it is made of. In this article, the current sensitivity of ORGAN to various promising dark matter candidates is presented, and the future sensitivity is projected.
Ben T. McAllister, Aaron Quiskamp, Ciaran A. J. O'Hare, Paul Altin, Eugene N. Ivanov, Maxim Goryachev, Michael E. Tobar   +6 more
wiley   +1 more source