Light gauge boson interpretation for (g − 2) μ and the KL → π 0 + (invisible) anomaly at the J-PARC KOTO experiment

Yongsoo Jho; Sung Mook Lee; Seong Chan Park; Yeji Park; Po Yan Tseng

doi:10.1007/JHEP04(2020)086

Light gauge boson interpretation for (g − 2)_μ and the K_L → π ⁰ + (invisible) anomaly at the J-PARC KOTO experiment

Yongsoo Jho, Sung Mook Lee, Seong Chan Park, Yeji Park, Po Yan Tseng

Department of Physics

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Abstract We discuss a list of possible light gauge boson interpretations for the long- standing experimental anomaly in (g − 2)_μ and also recent anomalous excess in K_L→ π⁰ + (invisible) events at the J-PARC KOTO experiment. We consider two models: i) L_μ− L_τ gauge boson with heavy vector-like quarks and ii) (L_μ− L_τ) + є(B₃− L_τ) gauge boson in the presence of right-handed neutrinos. When the light gauge boson has mass close to the neutral pion in order to satisfy the Grossman-Nir bound, the models successfully explain the anomalies simultaneously while satisfying all known experimental constraints. We extensively provide the future prospect of suggested models.

Original language	English
Article number	86
Journal	Journal of High Energy Physics
Volume	2020
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2020)086
Publication status	Published - 2020 Apr 1

Bibliographical note

Funding Information:
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

Publisher Copyright:
© 2020, The Author(s).

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP04(2020)086

Cite this

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title = "Light gauge boson interpretation for (g − 2) μ and the KL → π 0 + (invisible) anomaly at the J-PARC KOTO experiment",

abstract = "Abstract We discuss a list of possible light gauge boson interpretations for the long- standing experimental anomaly in (g − 2)μ and also recent anomalous excess in KL→ π0 + (invisible) events at the J-PARC KOTO experiment. We consider two models: i) Lμ− Lτ gauge boson with heavy vector-like quarks and ii) (Lμ− Lτ) + є(B3− Lτ) gauge boson in the presence of right-handed neutrinos. When the light gauge boson has mass close to the neutral pion in order to satisfy the Grossman-Nir bound, the models successfully explain the anomalies simultaneously while satisfying all known experimental constraints. We extensively provide the future prospect of suggested models.",

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AU - Park, Seong Chan

AU - Park, Yeji

AU - Tseng, Po Yan

N1 - Funding Information: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited Publisher Copyright: © 2020, The Author(s).

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N2 - Abstract We discuss a list of possible light gauge boson interpretations for the long- standing experimental anomaly in (g − 2)μ and also recent anomalous excess in KL→ π0 + (invisible) events at the J-PARC KOTO experiment. We consider two models: i) Lμ− Lτ gauge boson with heavy vector-like quarks and ii) (Lμ− Lτ) + є(B3− Lτ) gauge boson in the presence of right-handed neutrinos. When the light gauge boson has mass close to the neutral pion in order to satisfy the Grossman-Nir bound, the models successfully explain the anomalies simultaneously while satisfying all known experimental constraints. We extensively provide the future prospect of suggested models.

AB - Abstract We discuss a list of possible light gauge boson interpretations for the long- standing experimental anomaly in (g − 2)μ and also recent anomalous excess in KL→ π0 + (invisible) events at the J-PARC KOTO experiment. We consider two models: i) Lμ− Lτ gauge boson with heavy vector-like quarks and ii) (Lμ− Lτ) + є(B3− Lτ) gauge boson in the presence of right-handed neutrinos. When the light gauge boson has mass close to the neutral pion in order to satisfy the Grossman-Nir bound, the models successfully explain the anomalies simultaneously while satisfying all known experimental constraints. We extensively provide the future prospect of suggested models.

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