Search for Axionlike Particles Produced in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Collisions at Belle II
書誌事項
- タイトル別名
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- Search for Axionlike Particles Produced in e⁺e⁻ Collisions at Belle II
抄録
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⁻ → γa, a → γγ in the mass range 0.2 < ma < 9.7 GeV/c² 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 gaγγ of ALPs to photons at the level of 10⁻³ GeV⁻¹. The limits are the most restrictive to date for 0.2 < ma < 1 GeV/c².
source:https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.161806
収録刊行物
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- Physical Review Letters
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Physical Review Letters 125 (16), 161806-, 2020-10-14
American Physical Society.
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詳細情報 詳細情報について
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- CRID
- 1050568617148931840
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- NII論文ID
- 120006950612
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- ISSN
- 00319007
- 10797114
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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