期刊
PHYSICAL REVIEW D
卷 94, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.94.011102
关键词
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资金
- BABAR
- SLAC
- US Department of Energy
- National Science Foundation
- Natural Sciences and Engineering Research Council (Canada)
- Commissariat a l'Energie Atomique (France)
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung (Germany)
- Deutsche Forschungsgemeinschaft (Germany)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Foundation for Fundamental Research on Matter (The Netherlands)
- Research Council of Norway
- Ministry of Education and Science of the Russian Federation
- Ministerio de Economia y Competitividad (Spain)
- Science and Technology Facilities Council (United Kingdom)
- Binational Science Foundation (U.S.-Israel)
- Marie-Curie IEF program (European Union)
- A. P. Sloan Foundation (USA)
- STFC [ST/N000420/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Physics [1404070] Funding Source: National Science Foundation
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 7 x 10(-4) are derived, leading to improvements in the bounds compared to those previously derived from neutrino experiments.
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