Search for $Z^{'} rightarrow mu^{+} mu^{-}$ in the $L_mu {-} L_tau$ gauge-symmetric model at Belle

Czank, T.*; Tanida, Kiyoshi ; Belle Collaboration*; 209 of others*

We search for a new gauge boson that couples only to heavy leptons and their corresponding neutrinos in the process $e^{+} e^{-} rightarrow Z'(rightarrow mu^{+}mu^{-}) mu^{+}mu^{-}$ , using a 643 fb $^{-1}$ data sample collected by the Belle experiment at or near the resonances at the KEKB collider. For the first time, effects due to initial state radiation are used in estimating the detection efficiency. No signal is observed in the mass range of 0.212 $- 10 GeV/${it c}^2$$ and we set an upper limit on the coupling strength, , constraining as a possible contributor to the anomalous magnetic dipole moment of muon.

Language	:	English
Journal	:	Physical Review D
Volume	:	106
Number	:	1
Pages	:	p.012003_1 - 012003_10
Publication Year/Month	:	2022/07
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Paper URL	:	https://doi.org/10.1103/PhysRevD.106.012003
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Registration No. : AA20240661
JAEA Abstracts No. : 53000314
Paper Submission No. : 29107

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Search for in the gauge-symmetric model at Belle

Search for $Z^{'} rightarrow mu^{+} mu^{-}$ in the $L_mu {-} L_tau$ gauge-symmetric model at Belle