Thermodynamics of the electron–positron plasma at very high temperatures and sources of annihilation γ-quanta in our Galaxy [PDF]
Physics of Plasmas, 2023 Thermodynamic properties and equations of state of the electron–positron plasma (or gas) at high and very high temperatures (T≥170 keV) are derived and investigated.
A. Frolov
semanticscholar +1 more source
Novel method for the precise determination of the QCD running coupling from event shape distributions in electron-positron annihilation [PDF]
Physical Review D, 2019 We present a novel method for precisely determining the running QCD coupling constant ${\ensuremath{\alpha}}_{s}({Q}^{2})$ over a wide range of ${Q}^{2}$ from event shapes for electron-positron annihilation measured at a single annihilation energy $\sqrt{
Sheng-Quan Wang +4 more
semanticscholar +1 more source
Electron-positron annihilation freeze-out in the early universe [PDF]
Physical Review D, 2019 Electron-positron annihilation largely occurs in local thermal and chemical equilibrium after the neutrinos fall out of thermal equilibrium and during the Big Bang Nucleosynthesis (BBN) epoch. The effects of this process are evident in BBN yields as well
Luke C. Thomas +3 more
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Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order [PDF]
Journal of High Energy Physics, 2018 We study the production of polarized Λ-hyperons in electron-positron annihilation. We are particularly interested in the transverse-spin dependence of the cross section for unpolarized incident electron-positron pairs.
L. Gamberg +4 more
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Thrust distribution in electron-positron annihilation using the principle of maximum conformality [PDF]
Physical Review D, 2019 We present a comprehensive and self-consistent analysis for the thrust distribution by using the Principle of Maximum Conformality (PMC). By absorbing all nonconformal terms into the running coupling using PMC via renormalization group equation, the ...
Sheng-Quan Wang +3 more
semanticscholar +1 more source
The top-quark polarization beyond the Standard Model in electron–positron annihilation [PDF]
International Journal of Modern Physics A, 2019 Electron–positron annihilation into a pair of top quarks is considered at the energy of the future collider CLIC. Polarization components of the top quark are calculated with the [Formula: see text] and [Formula: see text] interactions which follow from ...
I. V. Truten, A. Korchin
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Testing entanglement of annihilation photons
Scientific Reports, 2023 We present a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest. Each annihilation photon has an energy that is five orders of magnitude higher than the energy of photons in optical ...
Alexander Ivashkin +7 more
doaj +1 more source
Explicit form of the R-ratio of electron–positron annihilation into hadrons
Journal of Physics G: Nuclear and Particle Physics, 2019 The explicit expression for the R-ratio of electron-positron annihilation into hadrons, which properly accounts for all the effects due to continuation of the spacelike perturbative results into the timelike domain, is obtained at an arbitrary loop level.
A. Nesterenko
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Annihilation of positrons, emitted at β+-decay with electrons of the daughter's atom [PDF]
Ядерна фізика та енергетика, 2010 The processes of photon creation or atom ionization during annihilation of positron with other electron of daughter’s atom at β+-decay are considered.
S. M. Fedotkin
doaj
Impacts of B-factory measurements on determination of fragmentation functions from electron-positron annihilation data [PDF]
, 2016 Fragmentation functions are determined for the pion and kaon by global analyses of charged-hadron production data in electron-positron annihilation. Accurate measurements were reported by the Belle and BaBar collaborations for the fragmentation functions
M. Hirai +5 more
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