scholarly journals Some constraints on neutral heavy leptons from flavor-conserving decays of theZboson

1995 ◽  
Vol 51 (7) ◽  
pp. 3569-3577 ◽  
Author(s):  
G. Bhattacharya ◽  
Pat Kalyniak ◽  
I. Melo
Keyword(s):  
Heavy Leptons ◽  
Neutral Heavy Leptons

scholarly journals Use ofΔφ-angle test to rule out neutral heavy leptons

1979 ◽  
Vol 19 (7) ◽  
pp. 2204-2206 ◽  
Author(s):  
Carl H. Albright ◽  
J. Smith
Keyword(s):  
Heavy Leptons ◽  
Neutral Heavy Leptons ◽  
Rule Out

scholarly journals Phenomenology of neutral heavy leptons

1997 ◽  
Vol 55 (3) ◽  
pp. 1453-1465 ◽  
Author(s):  
Pat Kalyniak ◽  
I. Melo
Keyword(s):  
Heavy Leptons ◽  
Neutral Heavy Leptons

scholarly journals Probing leptogenesis

2018 ◽  
Vol 33 (05n06) ◽  
pp. 1842005 ◽  
Author(s):  
E. J. Chun ◽  
G. Cvetič ◽  
P. S. B. Dev ◽  
M. Drewes ◽  
C. S. Fong ◽  
...  
Keyword(s):  
Beta Decay ◽  
Neutrino Oscillation ◽  
Necessary Conditions ◽  
Experimental Tests ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Symmetric Model ◽  
High Scale ◽  
Heavy Leptons ◽  
Neutral Heavy Leptons

The focus of this paper lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated from oscillations, as well as leptogenesis from out-of-equilibrium decays. As the Akhmedov–Rubakov–Smirnov (ARS) mechanism allows for heavy neutrinos in the GeV range, this opens up a plethora of possible experimental tests, e.g. at neutrino oscillation experiments, neutrinoless double beta decay, and direct searches for neutral heavy leptons at future facilities. In contrast, testing leptogenesis from out-of-equilibrium decays is a quite difficult task. We comment on the necessary conditions for having successful leptogenesis at the TeV-scale. We further discuss possible realizations and their model specific testability in extended seesaw models, models with extended gauge sectors, and supersymmetric leptogenesis. Not being able to test high-scale leptogenesis directly, we present a way to falsify such scenarios by focusing on their washout processes. This is discussed specifically for the left–right symmetric model and the observation of a heavy [Formula: see text], as well as model independently when measuring [Formula: see text] washout processes at the LHC or neutrinoless double beta decay.

scholarly journals Right-handed neutral heavy leptons in e+e− annihilation?

1977 ◽  
Vol 68 (1) ◽  
pp. 71-75 ◽  
Author(s):  
Benedikt Humpert ◽  
P.N. Scharbach
Keyword(s):  
Heavy Leptons ◽  
Neutral Heavy Leptons
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