scholarly journals Heavy Neutral Lepton searches at the LHC

2021 ◽  
Author(s):  
Matthias Komm
Keyword(s):  
Neutral Lepton

A note on searches for an intermediate-mass neutral lepton

1976 ◽  
Vol 19 (5) ◽  
pp. 655-657
Author(s):  
�. M. Lipmanov
Keyword(s):  
Intermediate Mass ◽  
Neutral Lepton

scholarly journals Review of accelerator-based searches for Neutral Long-Lived Particles

2019 ◽  
Vol 43 (169) ◽  
pp. 638-645
Author(s):  
Marta Losada
Keyword(s):  
Parameter Space ◽  
Coupling Strength ◽  
Current Status ◽  
Next Generation ◽  
Fixed Target ◽  
Beam Dump ◽  
Basic Formalism ◽  
Neutral Lepton

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.

SOME ASTROPHYSICAL CONSEQUENCES OF THE EXISTENCE OF A HEAVY STABLE NEUTRAL LEPTON

1996 ◽  
pp. 233-249
Author(s):  
J. E. GUNN ◽  
B. W. LEE ◽  
I. LERCHE ◽  
D. N. SCHRAMM ◽  
G. STEIGMAN
Keyword(s):  
Neutral Lepton

RACE DECAYS AND HEAVY NEUTRINO MIXING

1992 ◽  
Vol 07 (14) ◽  
pp. 1219-1222 ◽  
Author(s):  
ANDY ACKER ◽  
SANDIP PAKVASA
Keyword(s):  
Upper Bound ◽  
Branching Ratio ◽  
Heavy Neutrino ◽  
Neutrino Mixing ◽  
Neutral Lepton

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.

An accessible heavy neutral lepton

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

Search for heavy neutral leptons at the NA62 experiment at CERN

2018 ◽  
Vol 33 (31) ◽  
pp. 1844026
Author(s):  
Michal Zamkovsky
Keyword(s):  
Neutrino Mixing ◽  
Charged Kaon ◽  
Kaon Decays ◽  
Upper Limits ◽  
Neutral Lepton ◽  
Mixing Matrix

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.

Neutral lepton mass matrix

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

scholarly journals Search for heavy neutrinos at the NA48/2 and NA62 experiments at CERN

2018 ◽  
Vol 182 ◽  
pp. 02095
Author(s):  
Peruzzo Letizia
Keyword(s):  
Charged Kaon ◽  
Kaon Decay ◽  
Kaon Decays ◽  
Large Samples ◽  
Neutral Lepton

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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