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Study of the N2 vibrational relaxation behaviors via the CO rovibrational thermometry.
J Chem Phys
December 2024
Deep Space Exploration Laboratory/Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, People's Republic of China.
This paper performed a comprehensive study of the thermal nonequilibrium effects of CO/Ar mixtures with various degrees of N2 additions and probed the N2 relaxation behaviors via the CO rovibrational thermometry. The rovibrational temperature time histories of shock-heated CO/N2/Ar mixtures were measured via a laser-absorption technique, and the corresponding vibrational relaxation data were summarized at 1890-3490 K. The measured results were compared with predictions from the Schwartz-Slawsky-Herzfeld (SSH) formula and the state-to-state (StS) approach (treating CO and N2 as pseudo-species).
View Article and Find Full Text PDFRadiative corrections: from medium to high energy experiments.
Eur Phys J A Hadron Nucl
April 2024
Institute of Nuclear Physics, Johannes Gutenberg-Universität, 55099 Mainz, Germany.
Radiative corrections are crucial for modern high-precision physics experiments, and are an area of active research in the experimental and theoretical community. Here we provide an overview of the state of the field of radiative corrections with a focus on several topics: lepton-proton scattering, QED corrections in deep-inelastic scattering, and in radiative light-hadron decays. Particular emphasis is placed on the two-photon exchange, believed to be responsible for the proton form-factor discrepancy, and associated Monte-Carlo codes.
View Article and Find Full Text PDFNext-to-Next-to-Leading Order QCD Corrections to Polarized Semi-Inclusive Deep-Inelastic Scattering.
Phys Rev Lett
November 2024
The Institute of Mathematical Sciences, Taramani, 600113 Chennai, India.
Article Synopsis
- Polarized semi-inclusive deep-inelastic scattering (SIDIS) plays a crucial role in understanding the proton spin puzzle.
- The study presents comprehensive results for polarized SIDIS at next-to-next-to-leading order (NNLO) in quantum chromodynamics, covering all relevant interactions.
- A numerical analysis highlights the importance of NNLO corrections and demonstrates reduced scale dependence, particularly for the kinematics relevant to future electron-ion collider experiments.
Polarized Semi-Inclusive Deep-Inelastic Scattering at Next-to-Next-to-Leading Order in QCD.
Phys Rev Lett
November 2024
Università degli Studi di Milano-Bicocca and INFN, Piazza della Scienza 3, 20216 Milano, Italy.
Semi-inclusive hadron production in longitudinally polarized deep-inelastic lepton-nucleon scattering is a powerful tool for resolving the quark flavor decomposition of the proton's spin structure. We present the full next-to-next-to-leading order QCD corrections to the coefficient functions of polarized semi-inclusive deep-inelastic scattering (SIDIS) in analytical form, enabling the use of SIDIS measurements in precision studies of the proton spin structure. The numerical impact of these corrections is illustrated by a comparison with data of polarized single-inclusive hadron spectra from the DESY HERMES and CERN COMPASS experiments.
View Article and Find Full Text PDFArticle Synopsis
- Ultra-wideband systems enhance the capacity of existing fiber networks by transferring power between different wavelength channels using the principle of inelastic inter-channel stimulated Raman scattering.
- Effective management of launch power is crucial for optimizing data throughput, and while particle swarm optimization can solve this issue, it is computationally intensive and sensitive to changes in the objective value.
- The paper presents a fast, data-driven deep neural network approach that significantly speeds up processing time while maintaining high throughput, along with an iterative greedy algorithm that offers a near-optimal solution with much lower computational demands.
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