应6163银河net163am刘翔教授邀请，俄亥俄州立大学物理在读博士何丽萍来访并作学术报告。欢迎广大师生届时参加！

题目：Production of X(3872) and a Photon or a Pion

时间：2019年6月3日（星期一）上午9：30

地点：格致楼3016报告厅

摘要：The discovery of dozens of unexpected exotic hadrons containing a heavy quark and its antiquark presents a major challenge to our understanding of QCD. A consensus has not even been reached on the nature of the first one to be discovered: the X(3872). The observation in its decay modes has not been effective in discriminating between different models. There may be aspects of the production of X(3872) that are more effective at discriminating between models than the decays of X(3872).

If the X(3872) is a weakly bound charm-meson molecule, it can be produced by the creation of $D^{*0} \bar{D}^0$ or $D^0\bar{D}^{∗0)$ at short distances followed by the formation of the bound state from the charm-meson pairs. It can also be produced by the creation of $D^∗ \bar D^∗$ at short distances followed by the rescattering of the charm mesons into X(3872) and a photon or X(3872) and a pion. In this talk, I would talk about the production of X(3872) and a photon in electron positron collisions and the production of X(3872) and a pion from B meson decay and at hadron colliders, based on X(3872) as a loosely bound charm-meson molecule.

报告人简介：

何丽萍，2008-2012 兰州大学物理学基地班， 2012-2015 兰州大学理论物理硕士，导师：刘翔教授 。2015 至今， 俄亥俄州立大学物理博士在读，导师：Dr. Eric Braaten.