Search for a muonic dark force at BABAR

Abstract : Many models of physics beyond the Standard Model predict the existence of new Abelian forces with new gauge bosons mediating interactions between "dark sectors" and the Standard Model. We report a search for a dark boson Z' coupling only to the second and third generations of leptons in the reaction e+e- -> mu+mu- Z', Z' -> mu+mu- using 514 fb-1 of data collected by the BABAR experiment. No significant signal is observed for Z' masses in the range 0.212 - 10 GeV. Limits on the coupling parameter g' as low as 7x10^-4 are derived, leading to improvements in the bounds compared to those previously derived from neutrino experiments.
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Physical Review D, American Physical Society, 2016, 94, pp.011102. 〈10.1103/PhysRevD.94.011102〉
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http://hal.in2p3.fr/in2p3-01331571
Contributeur : Claudine Bombar <>
Soumis le : mardi 14 juin 2016 - 09:42:20
Dernière modification le : jeudi 11 janvier 2018 - 06:14:22

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J.-P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Search for a muonic dark force at BABAR. Physical Review D, American Physical Society, 2016, 94, pp.011102. 〈10.1103/PhysRevD.94.011102〉. 〈in2p3-01331571〉

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