Axionlike particles (ALPs) are predicted in many extensions of the standard model, and their masses can naturally be well below the electroweak scale. In the presence of couplings to electroweak bosons, these particles could be emitted in flavor-changing B meson decays. We report herein a search for an ALP, a, in the reaction B±→K±a, a→γγ using data collected by the BABAR experiment at SLAC. No significant signal is observed, and 90% confidence level upper limits on the ALP coupling to electroweak bosons are derived as a function of ALP mass, improving current constraints by several orders of magnitude in the range 0.175 GeV<4.78 GeV.

Search for an Axionlike Particle in B Meson Decays

Li Y.;Finocchiaro G.;Cenci R.;Gaz A.;Marchiori G.;Batignani G.;Lusiani Alberto
Membro del Collaboration Group
;
Ferroni F.;
2022

Abstract

Axionlike particles (ALPs) are predicted in many extensions of the standard model, and their masses can naturally be well below the electroweak scale. In the presence of couplings to electroweak bosons, these particles could be emitted in flavor-changing B meson decays. We report herein a search for an ALP, a, in the reaction B±→K±a, a→γγ using data collected by the BABAR experiment at SLAC. No significant signal is observed, and 90% confidence level upper limits on the ALP coupling to electroweak bosons are derived as a function of ALP mass, improving current constraints by several orders of magnitude in the range 0.175 GeV<4.78 GeV.
2022
Settore FIS/01 - Fisica Sperimentale
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.128.131802.pdf

accesso aperto

Tipologia: Published version
Licenza: Creative Commons
Dimensione 769.29 kB
Formato Adobe PDF
769.29 kB Adobe PDF

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: https://hdl.handle.net/11384/139389
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 5
  • OpenAlex ND
social impact