On December 1st 2010 the proposal of the COMPASS II Experiment 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 QCDrelated chal lenges, 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 singlepolarised pioninduced Drell–Yan muon production and in SIDIS on a liquid hydrogen tar get (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

COMPASS-II

CHIOSSO, Michela
2013-01-01

Abstract

On December 1st 2010 the proposal of the COMPASS II Experiment 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 QCDrelated chal lenges, 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 singlepolarised pioninduced Drell–Yan muon production and in SIDIS on a liquid hydrogen tar get (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
2013
Spin2012
Dubna, Russia
17-22 September 2012
44
6
882
885
M. Chiosso
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/158078
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