scholarly journals On the electron–positron energy asymmetry in KL→π0e+e−

2004 ◽  
Vol 586 (3-4) ◽  
pp. 307-313 ◽  
Author(s):  
Dao-Neng Gao
Keyword(s):  
Positron Energy ◽  
Electron Positron ◽  
Energy Asymmetry

scholarly journals Resolving the electron-positron mass annihilation mystery

2015 ◽  
Vol 1 (6) ◽  
pp. 250
Author(s):  
William S. Oakley
Keyword(s):  
Event Horizon ◽  
Space Time ◽  
Positive Energy ◽  
Positive Mass ◽  
Positron Energy ◽  
Curved Space ◽  
Field Curvature ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Low Energy Electrons

<p class="abstract"><span lang="EN-US">Mutual annihilation of low energy electrons and positrons results in two photons of equal energy. The annihilation is consistent with charge conservation but both particles have positive mass, so how do two positive masses annihilate? The issue is resolved by considering particles electromagnetic (EM) energy localized by curvature of the space-time metric. The curvature extends into the surrounding metric forming the particle’s gravitational field, usually attributed as due to mass by the observer, but only the curved space-time metric exists. In principle both positive and negative metric curvatures could exist and display positive and negative masses respectively, but both would possess positive energy. For the electron EM energy circulates in the observer domain and outside but close to an event horizon (EH), the positive metric curvature results in the impression of positive mass. Symmetry suggests positron energy circulates inside an EH and should have negative curvature. It is posited metric field curvature reverses on passage through an event horizon, thus the positron positive mass apparent to the observer arises from negative metric curvature inside the particle EH. The opposite metric curvatures of the electron and positron cancel on annihilation, eliminating their gravitational effects and thereby their apparent masses.</span></p>

scholarly journals Charge asymmetry in electron/positron energy loss in nuclear Bremsstrahlung

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Roman N. Lee ◽  
Andrey F. Pikelner
Keyword(s):  
Differential Equations ◽  
Energy Loss ◽  
Charge Asymmetry ◽  
High Energy ◽  
Coulomb Correction ◽  
Positron Energy ◽  
Incoming Particle ◽  
Electron Positron ◽  
The Difference ◽  
Arbitrary Energy

Abstract We calculate the leading Coulomb correction to the Bremsstrahlung energy loss in the electron-nucleus collisions for arbitrary energy of the incoming particle. This correction determines the charge asymmetry, i.e., the difference of electron and positron energy loss. The result is presented in terms of the classical polylogarithms Li2 and Li3. We use modern multiloop methods based on the IBP reduction and on the differential equations for master integrals. We provide both the threshold and the high-energy asymptotics of the found asymmetry and compare them with the available results.

Major Upgrade of the Beijing Electron-Positron Collider

2009 ◽  
Vol 2009 (3) ◽  
pp. 275-281 ◽  
Author(s):  
Hesheng Chen ◽  
Chuang Zhang ◽  
Weiguo Li
Keyword(s):  
Electron Positron

scholarly journals Search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c.

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
◽  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
...  
Keyword(s):  
Confidence Level ◽  
Branching Fraction ◽  
Center Of Mass ◽  
Leptonic Decay ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Upper Limit ◽  
Electron Positron

Abstract Using 10.1 × 109J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy $$ \sqrt{s} $$ s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction ℬ(J/ψ → D−e+νe + c. c.) < 7.1 × 10−8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.

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