Abstract
We propose to study the leptonic decays W± → e±e±μ ∓ ν and W± → μ±μ±e ∓ ν at the LHC to discover sterile neutrinos with masses below MW , and discriminate their Majorana or Dirac character. These decays are induced by a sterile neutrino N that goes on mass shell in the intermediate state. We find that, even though the final (anti-)neutrino goes undetected and thus lepton number is unchecked, one can distinguish between the Majorana vs. Dirac character of the intermediate sterile neutrino by comparing the production of e±e±μ ∓ vs. μ±μ±e ∓, provided the N-e and N-μ mixings are different enough. Alternatively, one can also distinguish the Majorana vs. Dirac character by studying the energy spectra of the opposite charge lepton, a method that works even if the N-e and N-μ mixings are equal.
| Original language | English |
|---|---|
| Article number | 012157 |
| Journal | Journal of Physics: Conference Series |
| Volume | 888 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2017 Sep 20 |
| Event | 27th International Conference on Neutrino Physics and Astrophysics, Neutrino 2016 - South Kensington, United Kingdom Duration: 2016 Jul 4 → 2016 Jul 9 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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Majorana vs. Dirac sterile neutrinos lighter than MW at the LHC. / Dib, C. O.; Kim, C. S.; Wang, K.; Zhang, J.
In: Journal of Physics: Conference Series, Vol. 888, No. 1, 012157, 20.09.2017.Research output: Contribution to journal › Conference article
TY - JOUR
T1 - Majorana vs. Dirac sterile neutrinos lighter than MW at the LHC
AU - Dib, C. O.
AU - Kim, C. S.
AU - Wang, K.
AU - Zhang, J.
PY - 2017/9/20
Y1 - 2017/9/20
N2 - We propose to study the leptonic decays W± → e±e±μ ∓ ν and W± → μ±μ±e ∓ ν at the LHC to discover sterile neutrinos with masses below MW , and discriminate their Majorana or Dirac character. These decays are induced by a sterile neutrino N that goes on mass shell in the intermediate state. We find that, even though the final (anti-)neutrino goes undetected and thus lepton number is unchecked, one can distinguish between the Majorana vs. Dirac character of the intermediate sterile neutrino by comparing the production of e±e±μ ∓ vs. μ±μ±e ∓, provided the N-e and N-μ mixings are different enough. Alternatively, one can also distinguish the Majorana vs. Dirac character by studying the energy spectra of the opposite charge lepton, a method that works even if the N-e and N-μ mixings are equal.
AB - We propose to study the leptonic decays W± → e±e±μ ∓ ν and W± → μ±μ±e ∓ ν at the LHC to discover sterile neutrinos with masses below MW , and discriminate their Majorana or Dirac character. These decays are induced by a sterile neutrino N that goes on mass shell in the intermediate state. We find that, even though the final (anti-)neutrino goes undetected and thus lepton number is unchecked, one can distinguish between the Majorana vs. Dirac character of the intermediate sterile neutrino by comparing the production of e±e±μ ∓ vs. μ±μ±e ∓, provided the N-e and N-μ mixings are different enough. Alternatively, one can also distinguish the Majorana vs. Dirac character by studying the energy spectra of the opposite charge lepton, a method that works even if the N-e and N-μ mixings are equal.
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U2 - 10.1088/1742-6596/888/1/012157
DO - 10.1088/1742-6596/888/1/012157
M3 - Conference article
AN - SCOPUS:85032433675
VL - 888
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012157
ER -