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Searching for stable tetraquark states in QCD

  

  報(bào)告題目:Searching for stable tetraquark states in QCD 

  報(bào)告人:陳偉 教授 中山大學(xué) 

  時(shí)間:2019722日(星期一)15:00 

  地點(diǎn):近代物理所5號(hào)樓1006會(huì)議室 

  報(bào)告摘要:A compact tetraquark is composed of a pair of diquark-antidiquark. Such a configuration has been used to interpret some unexpected hadron states. Recently, there are some efforts on searching for stable tetraquarks. In this talk, I will present our recent studies for the stable tetraquark states, including the doubly-bottom ud\bar b\bar d, the triply bottom bb\bar b\bar q and the fully-bottom bb\bar b\bar b tetraquarks. We calculated the mass spectra for these tetraquark states in a systematical way. Our results show that some of these states lie below the corresponding two-body hadronic decay thresholds. Once produced, they can only decay via electromagnetic and weak interactions. Very probably these tetraquark states are stable.  

  報(bào)告人簡(jiǎn)介:陳偉,理學(xué)博士,中山大學(xué)物理學(xué)院教授,博士生導(dǎo)師。2007年本科畢業(yè)于蘭州大學(xué),2012年博士畢業(yè)于北京大學(xué)。2012年至2017年在加拿大薩省大學(xué)從事博士后工作,2017年回國(guó),任中山大學(xué)物理學(xué)院教授。主要研究方向?yàn)樾聫?qiáng)子態(tài)和奇異強(qiáng)子態(tài)。關(guān)注新強(qiáng)子態(tài)的產(chǎn)生、衰變和質(zhì)量譜等性質(zhì),在隱粲四夸克態(tài)、五夸克態(tài)以及混雜態(tài)方面的理論研究工作受到國(guó)內(nèi)外同行的關(guān)注。以第一作者或通訊作者身份在Phys. Rept.、PRL、PRD、JHEP 等高水平雜志發(fā)表相關(guān)論文40 余篇,總被引用次數(shù)1600 多次,h-index 為22。共有6 篇論文入選ESI 高被引論文(Highly Cited Paper),兩篇論文入選了熱點(diǎn)論文(Hot Paper)。擔(dān)任PRL, PRD, PLB, NPB, EPJC,EPJA, Frontiers of Physics和International Journal of Modern Physics A 等期刊的審稿人。獲歐洲物理雜志EPJ-2017 DistinguishedReferee,Physics Letters B - Most Valued Reviewer for 2017 和Chinese Physics C -Top Reviewer for 2018。