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# Production of X(3872) accompanied by a photon or a pion

## by Ms. Liping He (Ohio State University)

Friday, May 31, 2019 from to (Asia/Shanghai)
at IHEP ( B326 )
 Description Abstract: 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. About the speaker: Aug. 2015 - now Ph.D student, The Ohio State University, Columbus, Ohio, USA Thesis advisor: Dr. Eric Braaten Sept. 2012 - Jun. 2015 Master in Physics, Lanzhou University, Lanzhou Thesis advisor: Dr. Xiang Liu Aug. 2008 - Jun. 2012 Bachelor in Physics, Lanzhou University, Lanzhou  Material: