Search

Your search keyword '"Zhang, Shenghui"' showing total 650 results
Start Over Author "Zhang, Shenghui"
650 results on '"Zhang, Shenghui"'

2. Contribution of coherent electron production to measurements of heavy-flavor decayed electrons in heavy-ion collisions

Author

Zhang, Shenghui, Ma, Rongrong, Ji, Yuanjing, Tang, Zebo, Yang, Qian, Zhang, Yifei, and Zha, Wangwei

Subjects
High Energy Physics - Phenomenology
Abstract

Heavy quarks, produced at early stages of heavy-ion collisions, are an excellent probe of the Quark-Gluon Plasma (QGP) also created in these collisions. Electrons from open heavy-flavor hadron decays (HFE) are good proxies for heavy quarks, and have been measured extensively in the last two decades to study QGP properties. These measurements are traditionally carried out by subtracting all known background sources from the inclusive electron sample. More recently, a significant enhancement of $e^+e^-$ pair production at very low transverse momenta was observed in peripheral heavy-ion collisions. The production characteristics is consistent with coherent photon-photon interactions, which should also constitute a background source to the HFE measurements. In this article, we provide theoretical predictions for the contribution of coherent electron production to HFE as a function of transverse momentum, centrality and collision energy in Au+Au and Pb+Pb collisions.

Published
2023

38. High intrinsic $ZT$ in InP$_3$ monolayer at room temperature

Author

Zhang, Shenghui, Niu, Xiaobin, Xie, Yiqun, Gong, Kui, Shao, Hezhu, Hu, Yibin, and Wang, Yin

Subjects
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Two-dimensional thermoelectric materials with a figure of merit $ZT$, which is greater than 2.0 at room temperature, would be highly desirable in energy conversion since the efficiency is competitive to conventional energy conversion techniques. Here, we propose that the indium triphosphide (InP$_3$) monolayer offers an extraordinary $ZT$ of 2.2 at 300 K by using quantum calculations within the ballistic thermal transport region. A remarkably low and isotropic phononic thermal conductivity is founded, which is due to flat lattice vibration modes. This low thermal conductivity takes a major responsibility to the impressively high $ZT$. Moreover, a large $ZT$ that is greater than 1.5 can be maintained, even if a 1% mechanic extension is applied on the lattice. These results suggest that the InP$_3$ monolayer is a promising candidate for low dimensional thermoelectric applications.

Published
2018
Full Text
View/download PDF

39. Multiplicity Dependence of Charged Particle, $\phi$ Meson and Multi-strange Particle Productions in p+p Collisions at $\sqrt{\rm s}$ = 200 GeV with PYTHIA Simulation

Author

Zhang, Shenghui, Zhou, Long, Zhang, Yifei, Zhang, Mingwei, Li, Cheng, Shao, Ming, Sun, Yongjie, and Tang, Zebo

Subjects
High Energy Physics - Phenomenology, Nuclear Theory
Abstract

We report the multiplicity dependence of charged particle productions for $\pi^{\pm}$, $K^{\pm}$, $p$, $\overline{p}$ and $\phi$ meson at $|y| < 1.0$ in p+p collisions at $\sqrt{\rm s}$ = 200 GeV with $\rm PYTHIA$ simulation. The impact of parton multiple interactions and gluon contributions is studied and found to be possible sources of the particle yields splitting as a function of $p_T$ with respect to multiplicity. No obvious particle species dependence for the splitting is observed. The multiplicity dependence on ratios of $K^-/\pi^-$, $K^+/\pi^+$, $\overline{p}/\pi^-$, $p/\pi^+$ and $\Lambda/K^{0}_{s}$ in mid-rapidity in p+p collisions is found following the similar tendency as that in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV from RHIC, which heralds the similar underlying initial production mechanisms despite the differences in the initial colliding systems., Comment: 6 pages, 11 figures

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results