Orientation phenomenon in ionization deceleration of electron-positron pairs in crystals

1993 ◽  
Vol 177 (1) ◽  
pp. 107-109
Author(s):  
A.A Grynenko ◽  
N.N Nasonov
Keyword(s):  
Electron Positron ◽  
Orientation Phenomenon

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.

scholarly journals Equilibration of the chiral asymmetry due to finite electron mass in electron-positron plasma

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
A. Boyarsky ◽  
V. Cheianov ◽  
O. Ruchayskiy ◽  
O. Sobol
Keyword(s):  
Electron Mass ◽  
Chiral Asymmetry ◽  
Electron Positron
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