New constraint on dark photon at T2K off-axis near detector

IF 5 1区物理与天体物理 Q1 PHYSICS, PARTICLES & FIELDS

Journal of High Energy Physics Pub Date : 2023-11-10 DOI:10.1007/jhep11(2023)056

Takeshi Araki, Kento Asai, Tomoya Iizawa, Hidetoshi Otono, Takashi Shimomura, Yosuke Takubo

引用次数: 1

Abstract

A bstract The T2K experiment is one of the most powerful long-baseline experiments to investigate neutrino oscillations. The off-axis near detector called ND280 is installed 280 m downstream from the neutrino production target to measure the neutrino energy spectrum. In this paper, we study the capability of the ND280 detector to search for the dark photon produced through the meson rare decay and proton bremsstrahlung processes at the proton beam dump. We find that the ten-year operation of T2K with the ND280 detector excludes the unexplored parameter region for the dark photon mass and kinetic mixing. We also show that a broader parameter region can be searched by the ND280 in the future T2K operation for dark photon as well as U(1) B−L gauge boson.

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T2K离轴近探测器暗光子的新约束

T2K实验是研究中微子振荡的最强大的长基线实验之一。离轴近探测器ND280安装在中微子产生目标下游280米处，用于测量中微子能谱。本文研究了ND280探测器在质子束流场中搜索介子稀有衰变和质子轫致辐射过程产生的暗光子的能力。我们发现，在ND280探测器的十年运行中，T2K排除了暗光子质量和动力学混合的未探测参数区域。我们还表明，ND280在未来的T2K操作中可以搜索到更宽的参数区域，用于暗光子和U(1) B−L规范玻色子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of High Energy Physics PHYSICS, PARTICLES & FIELDS-

CiteScore

10.00

自引率

46.30%

发文量

2107

审稿时长

12 weeks

期刊介绍： The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).