Results 61 to 70 of about 3,908 (165)

Solid-state crystallization, oxygen-vacancy rich mesopores and stable triad-silanol nests in ZSM-5 catalyst induced by electron-beam irradiation and calcination

Journal of Science: Advanced Materials and Devices
Mesopores and silanol nests are known two technological keys that essentially control the catalytic performance of ZSM-5 zeolite. However, designing and controlling them without using chemicals so that the produced ZSM-5 can have strongly enhanced ...
La Ly Nguyen, Tran Dong Xuan, Cao Van Chung, Le Phuc Nguyen, Ngo Thuy Phuong, Pham Thi Hue, Nguyen Thi Ngoc Hue, Nguyen Van Tiep, Nguyen Vu Minh Trung, Andrzej Drozdziel, Marcin Turek, Krzysztof Pyszniak, Hoang Anh Tuan Kiet, Hoang-Duy Nguyen, Thuy-Phuong Thi Pham, Nguyen Ngoc Anh, Nguyen Chinh Chien, Thi Thanh Huyen Nguyen, Nguyen Quang Hung, Luu Anh Tuyen   +19 more
doaj   +1 more source

Analysis of the CMD-3 detector data: selection of low-energy electron-positron annihilation into KKππ⁰ [PDF]

, 2023
Artem Uskov
openalex   +1 more source

Electron-positron annihilation into heavy leptons at two loops

Journal of High Energy Physics
We calculate the NNLO QED corrections to the C-even part of differential cross section of e + e − → μ + μ − process. We neglect power corrections in the electron mass and obtain the result in terms of Goncharov’s polylogarithms.
Roman E. Gerasimov, Petr A. Krachkov, Roman N. Lee   +2 more
doaj   +1 more source

About the creation of proton–antiproton pair at electron–positron collider in the energy range of ψ(3770) mass

Nuclear Physics B, 2014
The process of electron–positron annihilation into proton–antiproton pair is considered within the vicinity of ψ(3770) resonance. The interference between the pure electromagnetic intermediate state and the ψ(3770) state is evaluated.
A.I. Ahmadov, Yu.M. Bystritskiy, E.A. Kuraev, P. Wang   +3 more
doaj   +1 more source

Dark matter “transporting” mechanism explaining positron excesses

Journal of High Energy Physics, 2018
We propose a novel mechanism to explain the positron excesses, which are observed by satellite-based telescopes including PAMELA and AMS-02, in dark matter (DM) scenarios.
Doojin Kim, Jong-Chul Park, Seodong Shin
doaj   +1 more source

Electron-positron pair production and annihilation spectral features from compact sources [PDF]

, 1995
A. Niedźwiecki, A. A. Zdziarski, P. Coppi   +2 more
openalex   +1 more source

A reanalysis of event shape distributions in electron-positron annihilation

Journal of High Energy Physics
Theoretical calculations for event shape observables are often determined by using the conventional scale setting; i.e. the procedure defined by setting the renormalization scale to the center-of-mass energy μ r = s $$ \sqrt{s} $$ and evaluating ...
Zhu-Yu Ren, Sheng-Quan Wang, Jian-Ming Shen, Xing-Gang Wu, Leonardo Di Giustino   +4 more
doaj   +1 more source

Review of e+e− → π+π−η

EPJ Web of Conferences, 2018
In this talk we review the current experimental status of electron-positron annihilation into π+π-η as well as the theoretical models to describe the data. Application of the CVC hypothesis to get the τ- decay to π-π0η branching fraction is discussed and
Shekhovtsova Olga
doaj   +1 more source

Studies of stainless steel exposed to sandblasting

Nukleonika, 2015
The influence of sandblasting on surface and subsurface of stainless steel is investigated using variable energy positron beam (VEP), positron annihilation spectroscopy (PAS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Samples
Horodek Paweł, Eseev Marat K., Kobets Andrey G.   +2 more
doaj   +1 more source

Positron-Annihilation Lifetime Spectroscopy using Electron Bremsstrahlung [PDF]

, 2015
A. Wagner, W. Anwand, Maik Butterling, T. E. Cowan, F. Fiedler, F Fritz, M. Kempe, R. Krause‐Rehberg   +7 more
openalex   +1 more source