학술논문

Search for an Axionlike Particle in B Meson Decays
Document Type
article
Source
Physical Review Letters. 128(13)
Subject
Nuclear and Plasma Physics
Particle and High Energy Physics
Physical Sciences
BABAR Collaboration
Mathematical Sciences
Engineering
General Physics
Mathematical sciences
Physical sciences
Language
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