Results 61 to 70 of about 2,102 (188)

Holomorphic field theories and higher algebra

Bulletin of the London Mathematical Society, Volume 57, Issue 10, Page 2903-2974, October 2025.
Abstract Aimed at complex geometers and representation theorists, this survey explores higher dimensional analogs of the rich interplay between Riemann surfaces, Virasoro and Kac‐Moody Lie algebras, and conformal blocks. We introduce a panoply of examples from physics — field theories that are holomorphic in nature, such as holomorphic Chern‐Simons ...
Owen Gwilliam, Brian R. Williams
wiley   +1 more source

Higher-order QCD corrections to hadronic τ decays from Padé approximants

Journal of High Energy Physics, 2018
Perturbative QCD corrections to hadronic τ decays and e + e − annihilation into hadrons below charm are obtained from the Adler function, which at present is known in the chiral limit to five-loop accuracy.
Diogo Boito, Pere Masjuan, Fabio Oliani
doaj   +1 more source

Structure‐Function Relationships of Biomass‐Derived Materials for Zinc Metal Protection

Advanced Science, Volume 12, Issue 34, September 11, 2025.
This review analyses the mechanism of zinc anode degradation, focuses on the protective roles of the four major functional groups of carboxyl, amino, hydroxyl, and sulfonic acid groups in biomass materials, reveals the structure‐function relationship and synergistic effects of functional groups, and looks forward to the challenges and directions of ...
Qiwei Gao, Zhuo Chen, Ya He, Zhangxiang Hao, Junrun Feng   +4 more
wiley   +1 more source

The Quest for the Quark‐Gluon Plasma From the Perspective of Dynamical Models of Relativistic Heavy‐Ion Collisions

Astronomische Nachrichten, Volume 346, Issue 7-8, September 2025.
ABSTRACT The physics of heavy‐ion collisions is one of the most exciting and challenging directions of science for the last four decades. On the theoretical side one deals with a non‐abelian field theory, while on the experimental side today's largest accelerators are needed to enable these studies.
Marcus Bleicher, Elena Bratkovskaya
wiley   +1 more source

Heavy quark fragmentation in e + e − collisions to NNLO+NNLL accuracy in perturbative QCD

Journal of High Energy Physics
Fragmentation of heavy quarks into heavy-flavoured hadrons receives both perturbative and non-perturbative contributions. We consider perturbative QCD corrections to heavy quark production in e + e − collisions to next-to-next-to-leading order accuracy ...
Leonardo Bonino, Matteo Cacciari, Giovanni Stagnitto   +2 more
doaj   +1 more source

Sterile neutrino dark matter: impact of active-neutrino opacities

Journal of High Energy Physics, 2020
The resonant production of keV sterile-neutrino dark matter mainly takes place during the QCD epoch of the early universe. It has been argued that it could be strongly affected by the opacities (or damping rates) of active neutrinos, which receive non ...
Dietrich Bödeker, Alexander Klaus
doaj   +1 more source

Perturbative QCD

We give an introduction to perturbative Quantum Chromodynamics, focusing on a pedagogical description of concepts and methods to calculate cross sections measured at high energy colliders. After introducing basic concepts that allow for a perturbative expansion, such as factorisation and asymptotic freedom, we introduce loop integrals and the treatment
Heinrich, Gudrun, Olsson, Anton
openaire   +2 more sources

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 $α_s/π= 0.26$ 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

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

APPROACHING THE FINAL STATE IN PERTURBATIVE QCD [PDF]

International Journal of Modern Physics A, 2003
Infrared safe differential cross-sections, such as event shape distributions, can be measured over wide kinematic ranges, from regions where fixed order calculations are adequate to regions where nonperturbative dynamics dominate. Such observables provide an ideal laboratory for the study of the transition between weak and strong coupling in quantum ...
openaire   +1 more source