Results 71 to 80 of about 4,848 (208)

Second-order QCD corrections to the thrust distribution in electron-positron annihilation. [PDF]

Physical Review Letters, 2007
We compute the next-to-next-to-leading-order (NNLO) QCD corrections to the thrust distribution in electron-positron annihilation. The corrections turn out to be sizable, enhancing the previously known next-to-leading-order prediction by about 15 ...
A. Ridder, T. Gehrmann, E. Glover, G. Heinrich   +3 more
semanticscholar   +1 more source

Constraining the annihilation of dark matter via cosmic-ray positrons and electrons [PDF]

, 2021
Suwitchaya Setthahirun, Maneenate Wechakama   +1 more
openalex   +1 more source

From polymer to SiOC glass: structure, microstructure, mechanical, and thermal properties

Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.
Abstract The transformation of a methyl‐siloxane into a SiOC glass in Ar and reactive CO2 atmosphere was studied through positron annihilation spectroscopy, infrared spectroscopy, density, and calorimetric measurements, whereas the mechanical properties were monitored by nanoindentation and the thermal diffusivity measured by the laser flash method ...
Mattia Biesuz, Adane M. Abebe, Levent Karacasulu, Sebastiano Mariazzi, Roberto S. Brusa, Daria Szewczyk, Nicola Pugno, Giacomo Sero, Maik Butterling, Maciej Oskar Liedke, Andreas Wagner, Eric Hirschmann, Michele Cassetta, Gian D. Sorarù   +13 more
wiley   +1 more source

Comment on “Nondispersive analytical solutions to the Dirac equation”

Physical Review Research, 2020
In our Comment we question the validity of the claim made by Campos and Cabrera [Phys. Rev. Res. 2, 013051 (2020)2643-156410.1103/PhysRevResearch.2.013051] that their solutions of the Dirac equation in an external time-dependent electromagnetic field ...
Iwo Bialynicki-Birula, Zofia Bialynicka-Birula   +1 more
doaj   +1 more source

Assessment of the backscattered skin dose from the beam stopper on Halcyon and Ethos radiotherapy systems

Journal of Applied Clinical Medical Physics, Volume 26, Issue 11, November 2025.
Abstract Background The backscatter contribution from the beam stopper to the exit‐side skin dose on the Halcyon and Ethos radiotherapy systems has not been studied, and this contribution cannot be separated by experimental methods. Purpose This study aimed to assess how the beam backscatter from the beam stopper contributes to the exit‐side skin dose.
Linda Lankinen, Jouko Lehtomäki, Ari Harju, Magdalena Constantin, Taoran Li   +4 more
wiley   +1 more source

MMAPS: Missing-Mass A-Prime Search

EPJ Web of Conferences, 2017
An experiment is proposed to search for dark photons via electron-positron annihilation into photon plus dark photon. The dark photon would be reconstructed in a missing-mass technique, thus ensuring complete model independent.
Alexander Jim
doaj   +1 more source

Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors

Journal of Advanced Ceramics, 2020
Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysis.
A. Luchechko, Y. Shpotyuk, O. Kravets, O. Zaremba, K. Szmuc, J. Cebulski, A. Ingram, R. Golovchak, O. Shpotyuk   +8 more
doaj   +1 more source

Direct Imaging of Hydrogen‐Driven Dislocation and Strain Field Evolution in a Stainless Steel Grain

Advanced Materials, Volume 37, Issue 45, November 13, 2025.
Using in situ Bragg coherent X‐ray diffraction imaging, 3D nanoscale strain maps of a stainless steel grain were measured during hydrogen charging. Results show dislocation relaxation and climb, elucidating the role of point defects in hydrogen‐modified deformation behavior.
David Yang, Mujan Seif, Guanze He, Kay Song, Adrien Morez, Benjamin de Jager, Dmytro Nykypanchuk, Ross J. Harder, Wonsuk Cha, Edmund Tarleton, Ian K. Robinson, Felix Hofmann   +11 more
wiley   +1 more source

Positron Annihilation Spectroscopy of Active Galactic Nuclei

Journal of Astronomy and Space Sciences, 2019
A regular and random components in the fluxes of quanta and particles from AGN is investigated. We consider the diffuse component and detect radiative feedback after the passage of cosmic rays and quanta through AGN.
Alexander V. Yushchenko, Yeuncheol Jeong   +1 more
doaj   +1 more source

Interactions Between Active Matters and Endogenous Fields

Advanced Materials, Volume 37, Issue 45, November 13, 2025.
This review synthesizes endogenous field information and computational methods in contexts such as cancer, wounds, and biofilms. It organizes NAMs and AAMs by sensing, transmitting, and executing functions, compares their limitations, and from these contrasts proposes design strategies for next‐generation AAMs, offering perspectives to foster ...
Jinwei Lin, Qiaoxin Guan, Jiangqi Feng, Shuqin Chen, Leilei Xu, Jianguo Guan, Samuel Sánchez   +6 more
wiley   +1 more source