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Search for an invisibly decaying $Z^prime$ boson at Belle II in $e^+ e^- o μ^+ μ^- (e^pm μ^mp)$ plus missing energy final states

Belle II Collaboration
•
I. Adachi
•
P. Ahlburg
altro
V. I. Zhukova
2019
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
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 $Z^prime$ in the process $e^+ e^- o mu^+ mu^- Z^prime$ and of a lepton-flavor-violating $Z^prime$ in $e^+ e^- o e^pm mu^mp Z^prime$. 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 $L_mu-L_ au$ theory, into upper limits on the $Z^prime$ coupling constant at the level of $5 imes 10^-2div1$ for $M_Z^primeleq 6$ GeV/$c^2$.
DOI
10.1103/PhysRevLett.124.141801
WOS
WOS:000523637800002
Archivio
http://hdl.handle.net/11368/2955116
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85084169899
https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.124.141801
Diritti
open access
FVG url
https://arts.units.it/bitstream/11368/2955116/4/PhysRevLett.124.141801.pdf
Soggetti
  • High Energy Physics -...

  • High Energy Physics -...

Web of Science© citazioni
47
Data di acquisizione
Mar 28, 2024
Visualizzazioni
10
Data di acquisizione
Apr 19, 2024
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