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Search for Axionlike Particles Produced in e(+)e(-) Collisions at Belle II

Title
Search for Axionlike Particles Produced in e(+)e(-) Collisions at Belle II
Author
천병구
Issue Date
2020-10
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 125, no. 16, article no. 161806
Abstract
We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e(+)e(-) -˃ gamma a, a -˃ gamma gamma in the mass range 0.2 ˂ m(a) ˂ 9.7 GeV/c(2) using data corresponding to an integrated luminosity of (445 +/- 3) pb(-1). Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength g(a gamma gamma) of ALPs to photons at the level of 10(-3) GeV-1. The limits are the most restrictive to date for 0.2 ˂ m(a) ˂ 1 GeV/c(2).
URI
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.161806https://repository.hanyang.ac.kr/handle/20.500.11754/171822
ISSN
0031-9007; 1079-7114
DOI
10.1103/PhysRevLett.125.161806
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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