COMPASS-II

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• 作者：M. Chiosso (1)
  
• 刊名：Physics of Particles and Nuclei
• 出版年：2013
• 出版时间：November 2013
• 年：2013
• 卷：44
• 期：6
• 页码：882-885
• 全文大小：
• 作者单位：M. Chiosso (1)
  
  1. INFN, Sezione di Torino and University of Torino, V. P. Giuria 1, 10125, Torino, Italy
  
• ISSN：1531-8559

文摘

On December 1st 2010 the proposal of the COMPASS-II Experiment [1] has been approved by the CERN Research Board. After almost ten years of important results achieved by the COMPASS Collaboration in both nucleon spin physics, with the use of muon beam, and hadron spectroscopy, using hadron beams, this second phase offers now a unique chance to address in the very near future newly opened QCD-related challenges, at very moderate upgrade cost, thanks to the versatility of the COMPASS apparatus [2]. This implies mainly study of chiral perturbation theory (ChPT), by measuring the pion polarizability through Primakoff reaction; generalized parton distributions (GPDs), by measuring exclusive deeply virtual compton scattering (DVCS) and hard exclusive meson production (DVMP); transverse momentum dependent parton distributions (TMDs) in single-polarised pion-induced Drell-Yan muon production and in SIDIS on a liquid hydrogen target (in parallel to DVCS). An overview of the COMPASS-II proposal is presented here, with a main focus on the new upcoming investigation of the nucleon structure via the Drell-Yan and DVCS processes.