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Blast from the past II: constraints on heavy neutral leptons from the BEBC WA66 beam dump experiment

Abstract:
We revisit the search for heavy neutral leptons with the Big European Bubble Chamber in the 1982 proton beam dump experiment at CERN, focussing on those heavier than the kaon and mixing only with the tau neutrino, as these are far less constrained than their counterparts with smaller mass or other mixings. Recasting the previous search in terms of this model and including additional production and decay channels yields the strongest bounds to date, up to the tau mass. This applies also to our updated bounds on the mixing of heavy neutral leptons with the electron neutrino.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.21468/scipostphys.13.5.118

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
Linacre College
Role:
Author
ORCID:
0000-0002-3542-858X


Publisher:
SciPost
Journal:
SciPost Physics More from this journal
Volume:
13
Issue:
5
Article number:
118
Publication date:
2022-11-28
Acceptance date:
2022-10-05
DOI:
EISSN:
2542-4653


Language:
English
Pubs id:
1312192
Local pid:
pubs:1312192
Deposit date:
2022-12-20

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