报告一
【报告题目】Study the tetraquark (molecular) states with the QCD sum rules
【报告人】王志刚教授，华东电力大学
【报告地点】29幢414室
【报告时间】2024年1月10日,9:00-10:00
【报告内容】
In this report, we illustrate how to calculate the masses and decay widths of the tetraquark (molecular) states with the QCD sum rules, and divide the report in seven parts. In the first and second part, we explain the foundation of the QCD sum rules and the general steps in calculations. In the third part, we explain how to choose the input parameters. In the fourth part, we examine the reliability of the QCD sum rules. In the fifth and sixth parts, we give the mass spectrum of the tetraquark states and molecular states. In the seventh part, we illustrate how to calculate the decay widths.
报告二
【报告题目】Possible evidences from H(z) parameter data for physics beyond LCDM.
【报告人】杨荣佳教授，河北大学
【报告地点】29幢414室
【报告时间】2024年1月10日, 10:10-11:10
【报告内容】
We analyse H(z) parameter data with some conditions by using Lagrange mean value theorem in Calculus. We find that: (1) there exists decelerated phase at 1 sigma confidence level in the redshift range (0.38, 0.59); (2) the equation of state of dark energy may be less than -1 at 1 sigma confidence level at some redshifts in the redshift range (1.3, 1.53); (3) there exists accelerated phase at 1 sigma confidence level in the redshift range (1.037, 1.944). These results may provide possible evidences for physics beyond LCDM.
【报告人简介】
杨荣佳，清华大学博士，河北大学教授、博导，发表SCI论文50余篇，引用900余次；在暗能量宇宙学、黑洞物理学和修正引力等领域取得了较好的研究成果，受到了国内外学者的关注。主持完成国家自然科学基金项目2项、省自然科学基金面上项目2项等；曾获得河北省自然科学三等奖（排名第一）、河北省优秀硕士学位论文指导教师奖、河北省青少年学术创新奖等多项奖励；《科学通报》“爱因斯坦创建广义相对论100周年纪念专刊”特邀作者；EPL2011年度，最多引用的论文和最多引用的作者第25名。
邀请人：高先龙教授
