Search for new, weakly-coupled scaler boson using slow neutron scattering beam line

2015 Fiscal Year Final Research Report

• Project/Area Number: 25870160
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics; Quantum beam science
• Research Institution: The University of Tokyo
• Principal Investigator: Kamiya Yoshio 東京大学, 素粒子物理国際研究センター, 助教 (90434323)
• Research Collaborator: KOMAMIYA Sachio 東京大学, 大学院理学系研究科, 教授 (80126060)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 未知粒子探索 / 重力相互作用の検証 / 中性子ビーム / 2次元散乱分布測定 / キセノン原子ガス

Outline of Final Research Achievements

We searched new weakly-coupled scaler bosons by measuring the angular distribution of cold neutrons scattering off atomic xenon gas. Around 10 to the seventh scattering events in 72 hours were corrected at slow neutron scattering beam line. Measured scattering distribution was well described by the known scattering process, and no evidence for new particles was observed. Sensitivity of our experiment was world's best at 40 pm to 4 nm length scale, and the results improved the previous world's limits and gave new constraints for theoretically predicted particles.

Free Research Field

素粒子物理実験