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Picture two children playing on swings in a playground. One is a daredevil, launching themselves high off the ground in big arcs. The other daydreams, swinging gently.
Neutrinos are tricky beasts. Alone among known fundamental particles, they suffer from an identity crisis – if it were possible to put them on a weighing scale, you would unpredictably measure one of ...
The Super Proton Synchrotron (SPS) lives up to its superlative designation. It’s CERN’s second-largest accelerator and is the last link in the accelerator chain that feeds particle beams to the Large ...
Today, at the EPS-HEP Conference 2021, the ATLAS collaboration announced the first observation of a rare process: the simultaneous production of three W bosons.
MoEDAL bags a first（图）
MoEDAL实验 粒子对撞机 施温格机制 磁单极子
2023/5/29
The Monopole and Exotics Detector at the Large Hadron Collider (MoEDAL) does what it says on the tin. It searches for magnetic monopoles – hypothetical particles with either a “north” or a “south” mag...
Coming soon to a lab tabletop near you: a method of magneto-thermal imaging that offers nanoscale and picosecond resolution previously available only in synchrotron facilities.
The LHCb collaboration has measured a difference in mass between two particles of 0.00000000000000000000000000000000000001 grams – or, in scientific notation, 10-38 g. The result, reported in a paper ...
These now-iconic detectors are critical to a new era of exploration for the ATLAS experiment. In the coming years, a major upgrade to the LHC – known as the High-Luminosity LHC – aims to crank up the ...
LS2 Report: An upgraded Inner Tracking System joins the ALICE detector（图）
ALICE 检测器 LS2 像素探测器
2023/5/30
After two nerve-wracking months dedicated to the installation of the ALICE detector’s new Inner Tracking System (ITS), Corrado Gargiulo’s mechanical engineering team, in charge of the installation, ca...
今年4月，南华大学核科学技术学院郑波教授指导的硕士研究生黄麟钦作为第一完成人在国际高能物理领域top期刊PhysicalReviewD上以BESIII合作组名义发表题为“Measurement of the Born cross sections for e+e-→η′π+π-at center-of-mass energies between 2.00 and 3.08 GeV”的文章。
匈牙利魏格纳物理研究中心和瑞典隆德大学的科研人员发现了奇子（Odderon）存在的最新证据。相关论文发表于2021年3月《欧洲物理杂志》第81期。奇子是一种准粒子，对于理解标准模型中的强相互作用力非常重要。当奇数个夸克（构成物质的微小粒子）在质子和反质子碰撞过程中短暂地闪进闪出时，准粒子就会出现。如果在这个碰撞场景中出现了奇子，那么粒子自身的碰撞与粒子和反粒子的碰撞之间就存在碰撞截面（物理学术语，...
Today the LHCb experiment at CERN announced new results which, if confirmed, would suggest hints of a violation of the Standard Model of particle physics. The results focus on the potential violation ...
The best-known particle in the lepton family is the electron, a key building block of matter and central to our understanding of electricity. But the electron is not an only child. It has two heavier ...
四粲夸克组成的新粒子“现身”——或助理解质子和中子如何形成
四粲夸克组成 新粒子 质子 中子
2020/7/6
据欧洲核子研究中心（CERN）官网1日报道，该机构的大型强子对撞机底夸克实验（LHCb）合作组首次观察到一种由4个粲夸克组成的新粒子，这一发现将帮助物理学家更好地理解夸克之间如何紧密“相拥”，形成质子和中子等复合粒子，并有助发现新物理学。夸克通常三两成群，形成名为“强子”的粒子。但几十年来，理论学家预测存在四夸克和五夸克强子——所谓的“四夸克态”（tetraquarks）和“五夸克态”（penta...