High-Energyγ-Ray Source from Electron-Positron Pair Annihilation
نویسندگان
چکیده
منابع مشابه
Final–state Radiation in Electron–positron Annihilation into Pion Pair
In this article the final-state radiation (FSR) of the hard photon in e−(p1) + e(p2) → γ ∗(Q) → π(p+) + π −(p−) + γ(k) reaction is considered in the framework of ChPT with vector ρ and axial–vector a1 mesons 1) (the FSR diagrams are shown in Fig.1). Our consideration of FSR is motivated by the necessity to study model dependence of the next-to-leading order hadronic contribution a μ to anomalou...
متن کاملDevelopment of an electron - positron source for positron annihilation lifetime spectroscopy : FINAL REPORT
searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggesstions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Hi...
متن کاملInterference fragmentation functions in electron-positron annihilation
We study the process of electron-positron annihilation into back-to-back jets, where in each jet a pair of hadrons is detected. The orientation of these two pairs with respect to each other can be used to extract the interference fragmentation functions in a clean way, for instance from BELLE or BABAR experiment data. This is of relevance for studies of the transversity distribution function. I...
متن کاملExtracting α s from Electron – Positron Annihilation around 10 GeV
The total cross section for electron–positron annihilation into hadrons is calculated in the region just below the B meson threshold. QCD corrections up to third order, quark mass effects, initial state radiation, the running of α QED and the tails of the Υ resonances are included in the prediction. For given α s the prediction is accurate to 0.5 percent. An experimental measurement with the co...
متن کاملg-ray spectra from positron annihilation on atoms and molecules
Positron annihilation on a wide variety of atoms and molecules is studied. Room-temperature positrons confined in a Penning trap are allowed to interact with molecules in the form of low-pressure gases so that the interaction is restricted to binary encounters between a positron and a molecule. Data are presented for the g-ray spectra resulting from positrons annihilating in such interactions. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review
سال: 1965
ISSN: 0031-899X
DOI: 10.1103/physrev.137.b730