J/ψ-pair resonances by LHCb: a new revolution?
LHCb新发现的双J/ψ共振态:一次新的革命?作者机构:Dipartimento di Fisica and INFNSapienza Universitàdi RomaPiazzale Aldo Moro 2.1-00185 RomaItaly T.D.Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China
出 版 物:《Science Bulletin》 (科学通报(英文版))
年 卷 期:2020年第65卷第23期
页 面:1949-1951页
核心收录:
学科分类:07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
摘 要:In a research article appeared in this journal[1], the LHCb Collaboration has presented an extraordinary result on the mass spectrum of J/ψ-pairs produced in proton-proton high energy collisions. The spectrum shows: a narrow structure around 6:9 GeV matching the lineshape of a resonance and a broad structure just above twice the J/ψ mass. In the same region, more resonances may be present, not clearly distinguished within present statistics(see Fig. 1). A new spectroscopy is waiting for us, that of fully charm tetraquarks, which parallels the spectroscopy of charmonia revealed by the J/ψ discovery of 1974.