Projected NA62 sensitivity to heavy neutral lepton production in K+ -> pi(0)e(+) N decays
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Projected NA62 sensitivity to heavy neutral lepton production in K+ -> pi(0)e(+) N decays. / Tastet, Jean-Loup; Goudzovski, Evgueni; Timiryasov, Inar; Ruchayskiy, Oleg.
I: Physical Review D, Bind 104, Nr. 5, 055005, 08.09.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Projected NA62 sensitivity to heavy neutral lepton production in K+ -> pi(0)e(+) N decays
AU - Tastet, Jean-Loup
AU - Goudzovski, Evgueni
AU - Timiryasov, Inar
AU - Ruchayskiy, Oleg
PY - 2021/9/8
Y1 - 2021/9/8
N2 - Heavy neutral leptons (HNLs) appear in many extensions of the Standard Model of particle physics. In this study, we investigate to which extent the NA62 experiment at CERN could improve the existing bounds on the HNL mixing angle vertical bar Ue vertical bar(2) by performing a missing mass search in K+ -> pi(0)e(+)N decays in flight. We show that the limit vertical bar Ue vertical bar(2) similar or equal to 2 x 10(-6) can be reached with the currently available data in the mass range 125-144 MeV, which is currently not well covered by production searches. Future data, together with a dedicated trigger and/or improvements in rejection of out-of-acceptance photons, can improve this limit by another order of magnitude.
AB - Heavy neutral leptons (HNLs) appear in many extensions of the Standard Model of particle physics. In this study, we investigate to which extent the NA62 experiment at CERN could improve the existing bounds on the HNL mixing angle vertical bar Ue vertical bar(2) by performing a missing mass search in K+ -> pi(0)e(+)N decays in flight. We show that the limit vertical bar Ue vertical bar(2) similar or equal to 2 x 10(-6) can be reached with the currently available data in the mass range 125-144 MeV, which is currently not well covered by production searches. Future data, together with a dedicated trigger and/or improvements in rejection of out-of-acceptance photons, can improve this limit by another order of magnitude.
KW - DARK-MATTER
KW - MASSES
KW - SIMULATION
KW - NEUTRINOS
KW - VMSM
U2 - 10.1103/PhysRevD.104.055005
DO - 10.1103/PhysRevD.104.055005
M3 - Journal article
VL - 104
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 5
M1 - 055005
ER -
ID: 280058215