Search for an Axionlike Particle in B Meson Decays

(BaBar Collaboration)

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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<ma<4.78 GeV.

Original languageEnglish
Article number131802
JournalPhysical Review Letters
Volume128
Issue number13
DOIs
StatePublished - 1 Apr 2022

Funding

FundersFunder number
Stichting voor Fundamenteel Onderzoek der Materie
National Science Foundation
Institut National de Physique Nucléaire et de Physique des Particules
Science and Technology Facilities Council
A. P. Sloan Foundation
Instituto Nazionale di Fisica Nucleare
Norges Forskningsråd
Ministerio de Economía y Competitividad
Bundesministerium für Bildung und Forschung
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Deutsche Forschungsgemeinschaft
European Commission
U.S. Department of Energy
Marie Curie
Ministry of Education and Science of the Russian Federation
Natural Sciences and Engineering Research Council of Canada
United States-Israel Binational Science FoundationU.S.-Israel
UK Research and Innovation53706

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