| 2 | Experimental review of the T(1S,2S,3S)physics at e^(+)e^(-) colliders and the LHC显示文摘The three lowest-lying r states,ie,r(1S),T(2S),and r(35),composed of b pairs and below the BB threshold,provide a good platform for the researches of hadronic physics and physics beyond the Standard Model.They can be produced directly in ete--colliding experiments,such as CLEO,Babar,and Belle,with low continuum backgrounds.In these experiments,many measurements of the exclusive r(1S)and r(2S)decays into light hadrons,which shed light on the'80%rule'for the Okubo-Zweig-lizuka suppressed decays in the bottomonium sector,were carried out.Meanwhile,many studies of the charmonium and bottomonium productions in r(1S,2S,3S)decays were performed,to distinguish different Quantum Chromodynamics(QCD)models.Besides,exotic states and new physics were also extensively explored in r(1S,2S,3S)decays at CLEO,BaBar,and Bell.The r(1S,2S,3S)states can also be produced in p collisions and in ollisions involving heavy ions.The precision measurements of their cross sections and polarizations at the large hadron collider(LHC),especially in the CMS,ATLAS,and LHCb experiments,help to understand r production mechanisms in Pp collisions.The observation of the sequential r suppession in heavy ion collisions at CMS,LHCb,and ALICE is of great importance for verifying the quark-gluon plasma predicted by QCD.In this article,we review the experimental results on T(1S,2S,3S)at e+e-colliders and the LHC,and summarize their prospects at Belle II and the LHC. | Sen Jia Xingyu Zhou Chengping Shen | 2020 | Frontiers of physics2020，15，6： | 0 |
| 3 | Nickel-Catalyzed Cross-Electrophile Coupling of Triazine Esters with Aryl Bromides显示文摘Cross-electrophile coupling of triazine esters with aryl bromides could be facilely accomplished by employing nickel as catalyst,magnesium as metal mediator,and lithium chloride as additive.The reactions proceeded efficiently in THF at room temperature through C—O bond activation to afford an array of structurally different diaryl ketones in moderate to good yields with wide functional group tolerance.Control experiments showed that nickel,magnesium,lithium chloride,and THF are all indispensable for the good performance of the coupling reaction.Preliminary mechanistic exploration indicated that in situ formed arylmagnesium reagent by the insertion of magnesium into aryl bromide might serve as the key intermediate of the cross-coupling.The method which avoids the utilization of moisture-labile and relatively difficult-to-obtain organometallics is step-economical,cost-efficient,and operationally simple,potentially serving as an attractive alternative to documented methods. | Xiang Liu Cai-Yu He Hao-Nan Yin Chengping Miao Xue-Qiang Chu Weidong Rao Hao Xu Xiaocong Zhou Zhi-Liang Shen | 2023 | Chinese Journal of Chemistry2023，41，24： | 0 |
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