报告题目：Fully Differential Study of Molecular Fragmentation in p + H2 Collisions

报告人：  Prof. Dr. Michael Schulz

Physics Department, Missouri University of Science and Technology, USA

时间：8月11日（星期五） 上午10：00

地点：中国科学院近代物理研究所5号楼911会议室

Michael Schulz

Education:

October 1987, Ph.D. (Physics), Thesis: "Capture with Simultaneous Excitation Studied by Two Photon Coincidences for S15+H2 Collisions", Advisor: Prof. Dr. R. Schuch, Universität Heidelberg

Sep. 2002 – present, Professor, Department of Physics, Missouri University of Science & Technology, Rolla, MO

Aug. 2003 – present, Director of Laboratory for Atomic, Molecular, and Optical Research (LAMOR) at Missouri University of Science & Technology, Rolla, MO

Jan. 2006 – present, Curators’ Professor of Physics, Department of Physics, Missouri University of Science & Technology, Rolla, MO

Professional affiliation:

American Physical Society (Fellow)

Honors and awards (from 2011):

Fulbright Scholarship, 2011

Extreme Matter Institute (EMMI) Visiting Professor (declined in favor of Mercator Award), 2011

Deutsche Forschungs-Gemeinschaft Mercator Award, 2011

APS Outstanding Referee Award, 2013

Featured author in Journal of Physics +, August 14, 2015

Research activities:

102 Invited talks at national and international meetings

43 Invited seminar talks

1 Book

159 publications (130 in refereed journals, 8 invited review articles/book chapters, 18 in conference proceedings, 1 manuscript(s) accepted for publication in or submitted to refereed journal, 1 review article/book chapter submitted, 1 book review)

206 contributions at meetings

报告题目：gluo-dissociaton of heavy quarkonium and heavy baryon versus heavy meson ratio

报告人：Dr. Min He (何敏) 南京理工大学

时间安排：8月11日15:00

地点：中国科学院近代物理研究所5号楼1006会议室

报告摘要

Heavy quarks (open heavy flavor) and heavy quarkonia (hidden heavy flavor) are valuable probes of the hot medium created in relativistic heavy-ion collisions. This talk consists of two distinct works about hidden and open heavy flavor probes, respectively. In the first part, I will present our recent revisit to the gluo-dissociation of heavy quarkonia in the quark-gluon plasma. Within the theoretical framework of QCD multiple expansion, gluo-dissociaton cross secton of various charmonia and bottomonia are newly and systematically derived and evaluated using quantum mechanical perturabation method. Notable is the inclusion and evaluation of a new (chromo-magnetic dipole) mechanism of gluo-dissocation, in addition to the traditional chromo-electric dipole transtion. The contribution of the former to the charmonium dissocation rate turns out to be significant for $\J\psi$ dissociation at temperatures close to $T_{\rm pc}$.

In the second part of the talk, I will present our recent calculation of the heavy baryon ($\Lambda_c$) and the heavy meson ($D_0$) ratio at RHIC and LHC energies, using realistic charm quark and light quark spectra. We first calculate the various light baryon over meson ratio in the coalescence plus fragmentation model and reproduce the experimentally observed enhancement at intermediate pT. Gaining constraints on the model as well as the light quark spectra this way, we further calcualte the $\Lambda_c$ over $D_0$ ratio within the same framework, arguing it to be a sensitive measure of the degree of the charm quark thermaliztion. In particular, we will compare the results from instantaneous coalescence model and a resonance recombination model.

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