2026-04-17T21:41:30Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1194102025-12-05T16:42:17Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Graugés Pous, Eugeni author BABAR Collaboration author 2018-01-30T12:14:28Z 2018-01-30T12:14:28Z 2016-07-19 2018-01-30T12:14:28Z 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 − → μ + μ − Z ′ , Z ′ → μ + μ − 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 7 × 10 − 4 are derived, leading to improvements in the bounds compared to those previously derived from neutrino experiments. Partícules (Matèria) Matèria fosca (Astronomia) Particles Dark matter (Astronomy) Search for a muonic dark force at BaBar