Triple prompt J/\psi hadroproduction and multiple-parton interaction

by Prof. Yu-Jie Zhang (Beihang University)

Friday 19 Nov 2021, 10:30 → 11:30 Asia/Shanghai

B105 (CHEP)

We propose that the process of triple prompt J/ψ hadroproduction is a very clean hard probe of multiple-parton interaction at high-energy hadron colliders, especially the least known triple-parton scattering (1902.04949). A first complete study is carried out by considering single-, double-, and triple-parton scatterings coherently. Our calculation shows that it is a golden channel to probe double- and triple-parton scatterings, as the single-parton scattering is strongly suppressed. The predictions of the (differential) cross sections in proton-proton collisions at the LHC and future higher-energy hadron colliders are given. Our study shows that its measurement is already feasible with the existing data collected during the period of the LHC run 2. A method is proposed to extract the triple-parton scattering contribution, and therefore it paves a way to study the possible triple-parton correlations in a proton. The experimental data of triple J/ψ meson hadroproduction is released by CMS Collaboration in 2111.05370. Their result confirms our conclusion that triple-J/ψ production is a golden channel to study DPS and TPS, with minimal SPS contamination. 个人简介： 张玉洁，1998-2002沈阳工业大学本科，2002-2007北京大学博士，2007-2009北京大学博士后，2009至今北京航空航天大学。主要研究方向是量子色动力学及重夸克偶素物理。 Tecent Meeting: https://meeting.tencent.com/dm/XTUUv3WZuMZZ Meeting ID：740 560 760