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中国科学技术大学科研部STAR组在高能核物理实验方面取得重要进展(图)
高能核物理 高能重离子碰撞
2022/11/18
中国科学技术大学高能核物理课题组与美国布鲁克海文国家实验室(BNL)和山东大学等单位的联合研究团队,在RHIC-STAR国际合作组中发挥重要作用,首次在高能重离子碰撞过程中观测到源自纯能量的物质/反物质对的产生,并发现该过程中存在真空双折射的迹象,文章2021年8月4日发表在《物理评论快报》 Phys. Rev. Lett.127(2021) 52302。
中国科学技术大学唐泽波、张一飞课题组与美国劳伦斯伯克利国家实验室(LBNL)等单位合作,在RHIC-STAR国际合作组中发挥重要作用,在相对论重离子碰撞物理中取得重要突破,首次在RHIC能区观测到粲重子Λc相对粲介子D0产额的增强现象。这一现象表明重味夸克在极端高温高密的新物质形态——夸克胶子等离子体中有不同于冷核物质中的强子化机制,对深入研究夸克胶子等离子体特性具有重要意义。研究成果发表在《物理...
山东大学高能核物理组在STAR实验上又取得一重要研究成果(图)
山东大学 高能核物理 STAR实验
2019/10/31
近日,山东大学前沿交叉科学青岛研究院粒子科学技术研究中心杨驰副研究员、博士后杨钱与来自中国科学技术大学和美国布鲁克海文国家实验室的合作者组成的研究团队,在RHIC-STAR实验的国际合作中观测到高能原子核擦边对撞中极低横动量J/psi粒子产额的反常增强,并在世界上首次测量了这种对撞中极低横动量J/psi粒子的动量转移分布。实验结果揭示了非超擦边核核碰撞中也伴随着矢量介子的相干光致产生。这个超强磁场...
近日,位于美国布鲁克海文国家实验的RHIC-STAR国际实验组在Physical Review D上以快速通讯发表了目前最精确的W玻色子单自旋不对称的实验结果(Phys. Rev. D99,051102,2019)。新的实验结果将帮助澄清一个困扰粒子物理领域多年的基本问题:质子的自旋是如何由组成它的夸克和胶子来携带的?发表的新结果首次清晰揭示:质子内众多的海夸克因为味道不同,而对质子自旋的贡献差异...
STAR experiment results from the beam energy scan program at RHIC
beam energy scan program RHIC STAR experiment results
2011/7/21
We present the first results using the STAR detector from the Beam Energy Scan (BES) program at the Relativistic Heavy-Ion Collider (RHIC). In this program, Au ion collisions at center of mass energie...
We present the first results using the STAR detector from the Beam Energy Scan (BES) program at the Relativistic Heavy-Ion Collider (RHIC).
Periodic Box FHNC calculations of neutron star crustal matter. (I)
Periodic Box FHNC calculations neutron star crustal matter
2011/7/20
Neutron star crustal matter, whose properties are relevant in many models aimed at explaining observed astrophysical phenomena, has so far always been studied using a mean field approach. In order to ...
Advancements in full jet reconstruction have made it possible to use jets as triggers in azimuthal angular correlations to study the modification of hard-scattered partons in the medium created in ult...
STAR Highlights
STAR Highlights
2011/7/20
We report selected results from STAR collaboration at RHIC, focusing on jet-hadron and jet-like correlations, quarkonium suppression and collectivity, di-electron spectrum in both p+p and Au+Au, and h...
In recent years, the study of dihadron correlations has been one of the primary methods used to investigate the propagation and modification of hard-scattered partons through the QGP. Due to recent ad...
多位中国科学家参加的美国布鲁克海文国家实验室RHIC-STAR国际合作组探测到氦核的反物质粒子——反氦核。这种新型粒子又名反阿尔法粒子,是迄今为止所能探测到的最重的反物质原子核。STAR国际合作组的该研究成果于4月24日在线发表在《自然》(Nature)杂志。
位于纽约长岛的美国布鲁克海文国家实验室的相对论重离子对撞机(RHIC)利用两束接近于光速的金核对撞来模拟宇宙大爆炸,产生类似于早期宇宙的...
Non-photonic electron-hadron correlations and non-photonic electron $v_2$ at STAR/RHIC
Non-photonic electron-hadron correlations non-photonic electron STAR/RHIC
2010/12/31
Non-photonic electrons (when $p_T >$ 3 GeV/$c$) represent the directions of the parent heavy quarks, and their angular correlations with charged hadrons provide a unique tool to study the relative con...
Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
Rapid Cooling of the Neutron Star Cassiopeia Neutron Superfluidity
2011/1/10
We propose that the recently observed cooling of the neutron star in Cassiopeia A is due to
enhanced neutrino emission from the onset of the breaking and formation of neutron Cooper pairs
in the 3P2...
The Importance of Strange Mesons in Neutron Star Properties
Strange Mesons Neutron Star Properties
2010/10/15
In order to obtain the properties of compact stellar objects, appropriate equations of state have to be used. In the literature, strange meson fields, namely the scalar meson field s¤(975) and the vec...