Search for an Invisibly Decaying Z ' Boson at Belle II in e(+)e(-) -> mu(+)mu(-) (e(+/-)mu(-/+)) Plus Missing Energy Final States

Download
Author
Adachi, I; Ahlburg, P; Aihara, H; Akopov, N; Aloisio, A; Ky, NA; Asper, DM; Atmacan, H; Aushev, T; Aushev, V; ...Date
2020-04-06Source Title
Physical Review LettersPublisher
AMER PHYSICAL SOCUniversity of Melbourne Author/s
Milesi, MarcoAffiliation
School of PhysicsMetadata
Show full item recordDocument Type
Journal ArticleCitations
Adachi, I., Ahlburg, P., Aihara, H., Akopov, N., Aloisio, A., Ky, N. A., Asper, D. M., Atmacan, H., Aushev, T., Aushev, V., Aziz, T., Babu, V., Baehr, S., Bambade, P., Banerjee, S., Bansal, V., Barrett, M., Baudot, J., Becker, J. ,... Zhukova, V. (2020). Search for an Invisibly Decaying Z ' Boson at Belle II in e(+)e(-) -> mu(+)mu(-) (e(+/-)mu(-/+)) Plus Missing Energy Final States. PHYSICAL REVIEW LETTERS, 124 (14), https://doi.org/10.1103/PhysRevLett.124.141801.Access Status
Open AccessAbstract
Theories beyond the standard model often predict the existence of an additional neutral boson, the Z^{'}. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z^{'} in the process e^{+}e^{-}→μ^{+}μ^{-}Z^{'} and of a lepton-flavor-violating Z^{'} in e^{+}e^{-}→e^{±}μ^{∓}Z^{'}. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an L_{μ}-L_{τ} theory, into upper limits on the Z^{'} coupling constant at the level of 5×10^{-2}-1 for M_{Z^{'}}≤6 GeV/c^{2}.
Export Reference in RIS Format
Endnote
- Click on "Export Reference in RIS Format" and choose "open with... Endnote".
Refworks
- Click on "Export Reference in RIS Format". Login to Refworks, go to References => Import References