Measurement of([I]cc++) production in pp collisions at √s=13 TeV

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2020,（2）
• 页码范围: 13-23
• 页数: 11页
• 语种: 英文
• DOI: 10.1088/1674-1137/44/2/022001

摘要

The production of ([I])cc++ baryons in proton-proton collisions at a centre-of-mass energy of √s =13 TeV is measured in the transverse-momentum range 4 ＜ PT ＜ 15 GeV/c and the rapidity range 2.0 ＜ y ＜ 4.5.The data used in this measurement correspond to an integrated luminosity of 1.7 fb-1,recorded by the LHCb experiment during 2016.The ratio of the ([I])cc++ production cross-section times the branching fraction of the ([I])cc++ → Λ+cK-π+π+ decay relative to the prompt Λc+ production cross-section is found to be (2.22 + 0.27 + 0.29)× 10-4,assuming the central value of the measured ([I])cc++ lifetime,where the first uncertainty is statistical and the second systematic.