scholarly journals Heavy Neutral Lepton searches at the LHC

2021 ◽  
Author(s):  
Matthias Komm
Keyword(s):  
1976 ◽  
Vol 19 (5) ◽  
pp. 655-657
Author(s):  
�. M. Lipmanov

Author(s):  
Marta Losada

In this paper we present the current status of searches for neutral long-lived particles. The basic formalism that allows the determination of the number of expected long-lived particles is presented. Heavy neutral leptons can be a type of long-lived particles. The main observational motivations for the existence of heavy neutral lepton is covered as well. A summary of the main results from both collider searches and fixed target/beam dump experiments is presented. The outlook for next generation experiments and their impact on the parameter space of coupling strength and mass of heavy neutral leptons is also discussed.


Author(s):  
J. E. GUNN ◽  
B. W. LEE ◽  
I. LERCHE ◽  
D. N. SCHRAMM ◽  
G. STEIGMAN
Keyword(s):  

1992 ◽  
Vol 07 (14) ◽  
pp. 1219-1222 ◽  
Author(s):  
ANDY ACKER ◽  
SANDIP PAKVASA

From the experimental upper bound on the decay μ→eγ the mixing of a heavy neutral lepton (m>45 GeV ) with νe and νμ can be constrained to be [Formula: see text]. In turn this implies a contribution to KL→μe of no more than 2×10-15 in the branching ratio.


1982 ◽  
Vol 115 (6) ◽  
pp. 455-460 ◽  
Author(s):  
Chao-hsi Chang
Keyword(s):  

2018 ◽  
Vol 33 (31) ◽  
pp. 1844026
Author(s):  
Michal Zamkovsky

Search for heavy neutral lepton (HNL) production in charged kaon decays using the data collected by kaon experiments NA48/2 and NA62 at CERN are reported. Upper limits are established on the elements of the extended neutrino mixing matrix for heavy neutral lepton mass in the range 130–450 MeV, improving on the results from previous HNL production search.


1981 ◽  
Author(s):  
J. A. Harvey ◽  
P. Ramond ◽  
D. B. Reiss
Keyword(s):  

2018 ◽  
Vol 182 ◽  
pp. 02095
Author(s):  
Peruzzo Letizia

The NA48/2 experiment at CERN has collected large samples of charged kaons decaying into a pion and two muons for the search of heavy nuetrinos. In addition, its successor NA62 has set new limits on the rate of charged kaon decay into a heavy neutral lepton (HNL) and a lepton, with l = e; μ, using the data collected in 2007 and 2015. New limits on heavy neutrinos from kaon decays into pions, muons and positrons are presented in this report.


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