Measurement of Absolute Amount of Anti-Quarks in Proton at SeaQuest Experiment

2015 Fiscal Year Final Research Report

• Project/Area Number: 25800133
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Nakano Kenichi 東京工業大学, 理工学研究科, 助教 (20525779)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 陽子 / 反クォーク分布 / フレーバー非対称性 / Drell-Yan反応

Outline of Final Research Achievements

The Drell-Yan process from proton+proton and proton+deuteron reactions was measured using proton beam and liquid hydrogen/deuterium targets at Fermilab in USA. It is aimed at deriving the asymmetry and the absolute amounts of anti-up and anti-down quarks in the proton. Physics data were accumulated in three data-taking periods from H25/11 to H28/07 (planned), and in the first period a detector for absolute beam intensity was developed and installed. The physics data were analyzed and a preliminary result of the asymmetry of anti-up and anti-down quarks was obtained.

Free Research Field

素粒子・原子核物理学実験