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PSR J1614-2230 May Include Hyperons

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Chinese Physics Letters 2011年第8期28卷 352-355页

作者： YU Zi DING Wen-Bo bao tmurbagan LIU Ning-Ning The College of Science Nanjing Forestry UniversityNanjing 210037 Department of Physics Bohai UniversityJinzhou 121000 College of Physics and Electronic Engineering Nanyang Normal UniversityNanyang 473061 Department of Basic Course Nanjing Institute of TechnologyNanjing 211167

In the framework of the relativistic mean field theory,it is found that recently discovered PSR J1614-2230 with mass of 1.97±0.04Mʘmay include hyperons when the weakly interacting light boson(WILB)is *** describe PSR J1614−2230 with the equation of state(EOS)including hyperons,the characteristic scale of the WILB(g^(2)/μ^(2))should lie in the range of 13–46(24–46)GeV^(−2) with the weak(strong)hyperon-hyperon(YY)*** measurements of inertial momentum and the total neutrino luminosity of the neutron star could be used to further constrain the characteristic scale of the *** more stringent constraint on the WILB is given,the mass measurement of the neutron star could not exclude any soft EOS.

关键词： interaction weakly momentum

Neutrino Emission and Cooling of Dark-Matter-Admixed Neutron Stars

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Chinese Physics Letters 2019年第4期36卷 91-94页

作者： Wen-Bo Ding Zi Yu Yan Xu Chun-Jian Liu tmurbagan bao College of Mathematics and Physics Bohai University College of Science Nanjing Forestry University Changchun Observatory National Astronomical Observatories Chinese Academy of Sciences College of Physics And Electronic Information Inner Mongolia University for the Nationalities

The GW170817 binary neutron star merger event in 2017 has raised great interest in the theoretical research f neutron stars. The structure and cooling properties of dark-matter-admixed neutron stars are studied here using relativistic mean field theory and cooling theories. The non-self-annihilating dark matter(DM) component is assumed to be ideal fermions, among which the weak interaction is considered. The results show that pulsars J1614-2230, J0348+0432 and EXO 0748-676 may all contain DM with the particle mass of 0.2–0.4 GeV. However,it is found that the effect of DM on neutron star cooling is complicated. Light DM particles favor the fast cooling of neutron stars, and the case is converse for middle massive DM. However, high massive DM particles, around1.0 GeV, make the low mass(around solar mass) neutron star still undergo direct Urca process of nucleons at the core, which leads the DM-admixed stars cool much more quickly than the normal neutron star, and cannot support the direct Urca process with a mass lower than 1.1 times solar mass. Thus, we may conjecture that if small(around solar mass) and super cold(at least surface temperature 5–10 times lower than that of the usual observed data) pulsars are observed, then the star may contain fermionic DM with weak self-interaction.

关键词： binary fermions massive

The third family of compact stars with the color-flavor locked quark core

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Chinese Science Bulletin 2013年第31期58卷 3731-3734页

作者： WANG HongYan LIU GuangZhou WU YaoRui XU Yan ZHU MingFeng bao tmurbagan College of Physics Jilin University College of Physics Beihua University College of Computer Science and Technology Jilin University Changchun Observatory National Astronomical Observatories Chinese Academy of Sciences Institute for Numerical Calculations College of Physics and Electronic Information Inner Mongolia University for the Nationalities

In this paper,we study the third family of compact stars with the color-flavor locked(CFL)quark *** relativistic mean field model is used for hadronic matter and the MIT bag model for CFL quark *** results of the calculation show a transitional behavior that goes from the hadron star range,through the transition range,into the CFL quark star *** the transition range,the third family of compact stars with the CFL quark matter core is found in the wide range of the CFL energy gap 100MeV≤<150 *** comparing with early investigations,we argue that the greatest possible third family of compact stars may be the hybrid stars with the CFL quark core.

关键词：紧凑型荧光灯夸克物质锁定同色相对论平均场模型家族恒星 CFL

Model Dependance of Hybrid Star Properties

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Model Dependance of Hybrid Star Properties

Bulk Properties of Hybrid Stars with the Color-Flavor Locked QuarkMatter Core

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： bao tmurbagan Institute of Physics and Electronic Engineering Nan Yang Normal University

We studied dependance of hybrid star properties on hadronic models and quark models describing hadronic matter phase and quark matter phase in the interior of hybrid *** employed several parameter sets(GL85,GL91,TM1,TM2) in the framework of relativistic mean field theory to describe hadron phase and effective mass bag model,mass-density-dependent quark model,NJL model and MIT bag model with density-dependent bag constant to describe quark *** results indicate that onset of hadron-quark phase transition,particle fractions,equations of state and corresponding mass-radius relations of hybrid stars are depend weekly on hadronic models while using quark models except NJL model,but strictly on quark models or model *** properties of hybrid stars are depend obviously on hadronic models when we use NJL model to depict quark *** also find that mass-density-dependent quark model and NJL model are suitable to describe hybrid stars with big masses,effective mass bag model and MIT bag model with density-dependent bag constant are suitable to describe hybrid stars with small masses.

关键词： hybrid star hadronic model quark model equations of state

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Chinese Physics Letters 2013年第6期30卷 58-62页

作者： WANG Hong-Yan LIU Guang-Zhou WU Yao-Rui XU Yan ZHU Ming-Feng bao tmurbagan ZHAO En-Guang College of Physics and College of Computer Science and Technology Jilin UniversityChangchun 130012 College of Physics Beihua UniversityJilin 132013 Changchun Observatory National Astronomical ObservatoriesChinese Academy of SciencesChangchun 130117 Institute for Numerical Calculations College of Physics and Electronic Information Inner Mongolia University for theNationalitiesTongliao 028043 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190

We investigate the influence of the energy gap(Δ)of the color-flavor locked(CFL)quark phase on the bulk properties of hybrid *** relativistic mean field model is used for hadronic matter and the MIT bag model for CFL quark *** our calculation results,we find that with the increase of the CFL energy gap there exists a transition behavior,which goes from the hadron star range through the transition range into the CFL quark star *** observation data of PRS J1614-2230 are in the hadron star range(withΔ<40MeV).We also find that with hyperons the equation of state(EOS)for the hybrid star matter with the CFL quark matter core has a small change,which can be disregarded.

关键词： quark hadron transition

Relativistic Correction on Neutrino Emission from Neutron Stars in Various Parameter Sets

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Communications in Theoretical Physics 2016年第10期65卷 474-478页

作者： Wen-Bo Ding Zhan-Qiang Qi Jia-Wei Hou Geng Mi tmurbagan bao Zi Yu Guang-Zhou Liu En-Guang Zhao College of Mathematics and Physics Bohai University Jinzhou 121000 China College of Chemistry Chemical Engineering and Food Safety Bohai University Jinzhou 121000 China College of Physics And Electronic Information Inner Mongolia University For The Nationalities Tongliao 028043 China College of Science Nanjing Forestry University Nanjing 210037 China Center for Theoretical Physics Jilin University Changchun 130023 China 6Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

In the relativistic mean field theory and cooling theories,relativistic correction on neutrino emission from neutron stars in four typical nuclear parameter sets,GM1,GL85,GPS250 and GPS300 is *** show that relativistic effect makes the neutrino emissivity,neutrino luminosity and cooling rate lower,compared with the nonrelativistic *** the influence of relativistic effect grows with the mass of the neutron ***300 set leads to the biggest fall in neutrino emissivity,whereas GM1 set leads to the largest disparity in cooling rate caused by relativistic effect.

关键词： neutron star neutrino emission relativistic correction parameter set

水溶性TGA-CdTe量子点的超快弛豫动力学过程探究

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物理学报 2015年第11期64卷 90-96页

作者：韩元春包特木尔巴根内蒙古民族大学物理与电子信息学院通辽028043

本文以三个不同粒径(1#:2.3 nm,2#:2.8 nm和3#:3.5 nm)的巯基乙酸包覆的Cd Te量子点(thioglycolic acid capped Cd Te quantum dots,TGA-Cd Te QDs)样品为研究对象,其时间相关单光子计数(time-correlated single photon counting,TCSPC)实验得到的时间分辨光谱显示,三个量子点的荧光平均寿命依次是～6 ns,～10 ns和～12 ns,其动力学过程包括慢过程和快过程两部分.随其粒径尺寸的增加,其慢过程延长,快过程在变短.然后,通过瞬态吸收和荧光上转换两种基于飞秒的时间分辨光谱技术,对TGA-Cd Te量子点的带间弛豫过程做了探究.实验结果显示,三个TGA-Cd Te量子点样品,随其粒径增大,最高激发态和最低激发态填充速率减慢,其中,最高激发态从0.33 ps增加至0.79 ps;最低激发态从0.53 ps增至～1 ps.另外,由瞬态吸收和荧光上转换两种时间分辨手段相结合,可得到Cd Te量子点带间弛豫的完整图像,结果显示了TGA-Cd Te量子点的一个本征特征:即在基态漂白恢复过程中的初始上升阶段,荧光上转换信号要慢于瞬态吸收信号.这可以为量子点在光电转换应用上提供帮助.

关键词： TGA-CdTe量子点飞秒时间分辨光谱激子动力学

Breit夸克势的不同次正规化与η_c-J/ψ等的质量劈裂

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物理学报 2016年第4期65卷 39-45页

作者：吉日木图敖登包特木尔巴根内蒙古医科大学计算机信息学院呼和浩特010110 内蒙古民族大学物理与电子信息学院通辽028043

用夸克势模型研究结构相同而自旋和轨道量子数不同的介子之间质量劈裂是检验势模型有效性的重要手段之一.在以往的用各种夸克势模型计算质量劈裂工作中,当轻介子和重介子一起计算时,-很容易劈裂,而η_c-J/ψ等的劈裂都很难达到实验值.... 详细信息

用夸克势模型研究结构相同而自旋和轨道量子数不同的介子之间质量劈裂是检验势模型有效性的重要手段之一.在以往的用各种夸克势模型计算质量劈裂工作中,当轻介子和重介子一起计算时,-很容易劈裂,而η_c-J/ψ等的劈裂都很难达到实验值.这里首先用正规化形状因子μ~2/(q^2+μ~2),对完整的动量空间中的Breit夸克势的第三项实施二次正规化,除了第一项库仑势和第七项常数项势,对其余的项实施一次正规化,然后用来计算质量劈裂.研究计算发现,只有当屏蔽质量μ取为关于折合质量μ_r=m_im_j/(m_i+m_j)的三阶多项式时,轻介子π-ρ和重介子η_c-J/ψ,η_b-γ(1s),还有χ_(c0)-χ_(c1)-χ_(c2)等的劈裂精确达到实验值,同时其他介子质量也都比以往得到较大的改善.因此,本文给出了一个有效的夸克势模型.

关键词：非相对论夸克势模型介子束缚态正规化质量劈裂

X射线在Au-SiO_2界面剂量增强系数与Au厚度关系的模拟研究

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固体电子学研究与进展 2013年第5期33卷 425-427,440页

作者：张建芳特木尔巴根内蒙古民族大学物理与电子信息学院内蒙古通辽028043

用蒙特卡罗（MonteCarlo）方法计算Au—SiOz界面的剂量增强系数（DEF）随能量的变化关系及不同厚度的Au对Au—SiOz界面剂量增强系数的影响。结果表明：界面下的DEF与Au的厚度有关，当Au厚度从1gm增加到9tam，DEF随之增大；当Au厚度超过9... 详细信息

用蒙特卡罗（MonteCarlo）方法计算Au—SiOz界面的剂量增强系数（DEF）随能量的变化关系及不同厚度的Au对Au—SiOz界面剂量增强系数的影响。结果表明：界面下的DEF与Au的厚度有关，当Au厚度从1gm增加到9tam，DEF随之增大；当Au厚度超过9tam，随Au厚度增加DEF减小。当x射线能量为10～250keV时，界面附近SiO。一侧存在不同程度的剂量增强，而且在整个能量范围内出现了两个明显的峰值，其中剂量增强系数最大值达40．4。

关键词： X射线半导体蒙特卡罗方法界面剂量增强