Measurement of Drell-Yan Cross-Section in COMPASS

Chia-Yu Hsieh^1*, Wen-Chen Change¹

¹Physics Department, Academia Sinica, Taipei, Taiwan

* Presenter:Chia-Yu Hsieh, email:cyhsieh0531@gmail.com

The COMPASS experiment at CERN performed in 2015 and 2018 Drell-Yan measurements using a 190 GeV negative pion beam scattering off a NH3 target and nuclear aluminium and tungsten targets. We will present the differential cross section obtained from that measurement in the kinematic in x-Feynman, transverse momentum, and mass. The results will be valuable input for constraining parton distribution functions (PDFs) of the pion. We will present preliminary results on Drell-Yan cross sections and compare them to fixed-order QCD calculations with different pion PDFs. The kinematic dependence of nuclear effects in Drell-Yan production will be investigated by comparing the cross sections from three targets of different nuclear mass.

Keywords: Drell-Yan cross section, Parton Distribution Function, Transverse Momentum Distribution Function, Nuclear Effect