A Search for the new particle sector via Higgs boson

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400298
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: JINNOUCHI Osamu 東京工業大学, 大学院理工学研究科, 准教授 (50360566)
• Co-Investigator(Renkei-kenkyūsha): UNNO Yoshinobu 大学共同利用機関法人, 高エネルギー加速器研究機構, 教授 (40151956)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ピクセル検出器開発 / 検出器物質量測定 / 長寿命粒子探索 / 国際研究者交流 / スイス / CERN

Outline of Final Research Achievements

The Search for a new particle in the hidden sector is carried out with the world highest energy collider, LHC. The particle in this sector has a weak coupling to the Standard Model particles, and is expected to decay in the middle of the detector away from the interaction point. These decay points are called, secondary vertices, and is the signature of the long lived particles. The developments have been made to improve the detection efficiency of the secondary vertices and the method for estimating the backgrounds occurring inside the detector materials. These methods were applied to 2012 data, and observed no significant events. The exclusion limit on the specific phenomenology models were obtained, and published in the journal paper. The silicon pixel detector is newly developed towards the High-Luminosity LHC upgrades, which is required to have a high radiation tolerance, and the capability to being operated in the very high particle flux environment.

Free Research Field

素粒子物理学実験