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.

Search for a muonic dark force at BaBar

FERRONI, Fernando;
2016

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 − → 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.
Physics and Astronomy (miscellaneous)
File in questo prodotto:
File Dimensione Formato  
PostPrint_2016_PhysRevD_Lees.pdf

accesso aperto

Tipologia: Documento in Post-print
Licenza: Accesso gratuito
Dimensione 903.83 kB
Formato Adobe PDF
903.83 kB Adobe PDF Visualizza/Apri
2016_PhysRevD_Lees.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Licenza: Non pubblico
Dimensione 1.58 MB
Formato Adobe PDF
1.58 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/832
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 139
  • ???jsp.display-item.citation.isi??? 95
social impact