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AMS Analysis Collaboration Meeting Convened in Beijing

AMS Analysis Collaboration Meeting Convened in Beijing

From April 19 to 22, the Alpha Magnetic Spectrometer (AMS) Analysis Meeting was held at the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences. At the opening ceremony, Professor CAO Jun, Director of IHEP, delivered a welcome address. On behalf of the institute, he extended a warm welcome to the experts and scholars from around the world. He also introduced the IHEP’s history, disciplinary structure, and its involvement in major international scientific collaborations. He emphasized that IHEP will continue to actively participate in the AMS international collaboration and advance frontier research in fundamental physics.

LHAASO Discovers a New Extreme Particle Accelerator in the Milky Way

LHAASO Discovers a New Extreme Particle Accelerator in the Milky Way

China’s national large science infrastructure LHAASO has made an important breakthrough in exploring the extreme universe. It has for the first time detected ultra-high-energy gamma rays exceeding 100 TeV from the gamma-ray binary LS I +61° 303, measuring its spectrum up to 200 TeV. The observed energy-dependent orbital modulation indicates the UHE photons come from accelerated high-energy protons colliding with stellar wind. Published in Physical Review Letters, the finding confirms gamma-ray binaries are potential PeVatrons, restricts current particle acceleration theories, and promotes future multi-messenger astronomy research, led by IHEP CAS.

Russian Federation Minister of Science and Higher Education Delegation Visits Dongguan Campus of IHEP

Russian Federation Minister of Science and Higher Education Delegation Visits Dongguan Campus of IHEP

A delegation led by Mr. FALKOV Valery, Minister of Science and Higher Education of the Russian Federation, visited the Dongguan Campus of the Institute of High Energy Physics of the Chinese Academy of Sciences on April 16. The two sides held in-depth exchanges on the operation of large-scale scientific facilities, applications of neutron science, cutting-edge research in particle physics, and bilateral scientific and technological cooperation, advancing China-Russia cooperation in nuclear physics, neutron physics, large-scale scientific facilities and other fields to a higher level.

LHAASO Discovers 'Aquila Booster', Challenging Theoretical Limits of Particle Acceleration in PWNe

LHAASO Discovers 'Aquila Booster', Challenging Theoretical Limits of Particle Acceleration in PWNe

LHAASO has detected PeV gamma-ray emission from the pulsar wind nebula powered by PSR J1849-0001 in Aquila. Despite its spin-down luminosity being only 1/50 of the Crab Pulsar, the nebula emits stronger PeV gamma rays than the Crab Nebula, with its spectrum extending to 2 PeV. Multi-wavelength analysis shows its particle acceleration efficiency reaches at least 27% of the theoretical limit, even exceeding 100% under classic termination shock models. Named the Aquila Booster, this finding strongly challenges traditional pulsar wind nebula acceleration theories. It proves extreme PeV acceleration may be common among such nebulae rather than unique to the Crab Nebula, providing key evidence for revising relativistic plasma and particle acceleration theories.

Delegation Led by President of Chiang Mai University Visits IHEP

Delegation Led by President of Chiang Mai University Visits IHEP

From April 10 to 13, a delegation led by Prof. Pongruk Sribanditmongkol, President of Chiang Mai University (CMU) in Thailand, and Assco. Prof. Winita Punyodom, Vice President of CMU, visited the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences. The delegation conducted in-depth discussions and exchanges, and visited relevant laboratories and large research infrastructures of IHEP. Prof. CAO Jun, Director of IHEP, Prof. WANG Sheng, Deputy Director, Prof. DONG Yuhui, Deputy Director, Prof. WEN Liangjian, Deputy Director, Academician CAO Zhen, and research fellows from various relevant fields attended the meeting respectively.

Observation of New Radiative Decays of Excited Hyperons Λ(1520)/Λ(1690) at BESIII

Observation of New Radiative Decays of Excited Hyperons Λ(1520)/Λ(1690) at BESIII

The BESIII Collaboration has made a breakthrough in excited hyperon radiative decays, first observing Λ(1520)→γΣ⁰ and Λ(1690)→γΣ⁰, published in Physical Review Letters (2026). Using 10 billion J/ψ events, both signals exceed 15σ statistical significance. The measured branching fraction ratio of Λ(1520)→γΛ to γΣ⁰ is 3.19, consistent with SU(3) symmetry but excluding some quark models. In contrast, Λ(1690) shows no Λ(1690)→γΛ signal (upper limit <8% of γΣ⁰ channel). This anomalous decay pattern challenges theoretical descriptions of light quark dynamics and hyperon internal structure.

BESIII Experiment Observes Threshold Enhancement Effect in Dipion System

BESIII Experiment Observes Threshold Enhancement Effect in Dipion System

The BESIII international collaboration has observed a distinct resonance-like structure near the dipion mass threshold in charmonium decays, published in Physical Review Letters on April 8, 2026. Analyzing 37 million ψ(3686)→π⁺π⁻J/ψ events from 2.7 billion ψ(3686) data, a narrow peak at ~285.6 MeV/c² with small width was found. Model comparisons suggest it arises from S‑D wave mixing and final‑state interactions, not a conventional new particle. This discovery provides a high‑precision window for studying low‑energy non‑perturbative QCD and strong interaction dynamics.

LHAASO's high-precision measurement of the helium spectrum above 0.1 PeV: New Clues to the Origin of High-Energy Cosmic Rays

LHAASO's high-precision measurement of the helium spectrum above 0.1 PeV: New Clues to the Origin of High-Energy Cosmic Rays

Recently, the Large High Altitude Air Shower Observatory (LHAASO) achieved a breakthrough in high-precision, element-resolved measurements of cosmic-ray spectra in the "knee" region. The LHAASO Collaboration has observed unexpected variations in the flux of helium nuclei in cosmic rays as a function of energy per nucleus, along with novel features in the evolution of cosmic ray abundance resulting from these variations. The results were published online on March 26, 2026, in Physical Review Letters (Phys. Rev. Lett. 136, 121001 (2026)); the paper was selected as an Editors' Suggestion and featured by APS Physics. The work was led by the Institute of High Energy Physics, Chinese Academy of Sciences, with collaborators from Sapienza University of Rome and other institutions. The corresponding authors, all from the Institute of High Energy Physics, are WANG Liping, MA Lingling, ZHANG Shoushan, and CHEN Suhong.

The Fourth Meeting of HEPS International Advisory Committee Held in Beijing

The Fourth Meeting of HEPS International Advisory Committee Held in Beijing

Huairou, Beijing, March 25-27, 2026 –The fourth meeting of High Energy Photon Source (HEPS) International Advisory Committee (IAC) was held at the HEPS campus chaired by Harald Reichert from DESY and co-chaired by Zhentang ZHAO from SARI. The three-day meeting brought together 21 leading international experts to review the project's progress and future plans.

A New Method for Predicting Individualized Onset Time of Alzheimer's Disease

A New Method for Predicting Individualized Onset Time of Alzheimer's Disease

The pathological process of Alzheimer’s disease (AD) begins decades before the onset of clinical dementia symptoms. In recent years, the efficacy of newly approved anti-amyloid-beta (Aβ) therapies has been shown to depend critically on early intervention, making accurate prediction of individual dementia onset time in the pre-symptomatic stage an urgent clinical need. However, existing approaches often overlook the temporal heterogeneity among different biomarkers and typically rely on longitudinal follow-up data, limiting their applicability in real-world clinical settings where only single cross-sectional assessments are available.

News

AMS Analysis Collaboration Meeting Convened in Beijing
AMS Analysis Collaboration Meeting Convened in Beijing

From April 19 to 22, the Alpha Magnetic Spectrometer (AMS) Analysis Meeting was held at the Institute of High Energy Physics (IHEP), Chinese Academ...

LHAASO Discovers a New Extreme Particle Accelerator in the Milky Way
LHAASO Discovers a New Extreme Particle Accelerator in the Milky Way

China’s national large science infrastructure LHAASO has made an important breakthrough in exploring the extreme universe. It has for the first ti...

Russian Federation Minister of Science and Higher Education Delegation Visits Dongguan Campus of IHEP
Russian Federation Minister of Science and Higher Education Delegation Visits Dongguan Campus of IHEP

A delegation led by Mr. FALKOV Valery, Minister of Science and Higher Education of the Russian Federation, visited the Dongguan Campus of the Insti...

LHAASO Discovers 'Aquila Booster', Challenging Theoretical Limits of Particle Acceleration in PWNe
LHAASO Discovers 'Aquila Booster', Challenging Theoretical Limits of Particle Acceleration in PWNe

LHAASO has detected PeV gamma-ray emission from the pulsar wind nebula powered by PSR J1849-0001 in Aquila. Despite its spin-down luminosity being ...

Delegation Led by President of Chiang Mai University Visits IHEP
Delegation Led by President of Chiang Mai University Visits IHEP

From April 10 to 13, a delegation led by Prof. Pongruk Sribanditmongkol, President of Chiang Mai University (CMU) in Thailand, and Assco. Prof. Win...

Observation of New Radiative Decays of Excited Hyperons Λ(1520)/Λ(1690) at BESIII
Observation of New Radiative Decays of Excited Hyperons Λ(1520)/Λ(1690) at BESIII

The BESIII Collaboration has made a breakthrough in excited hyperon radiative decays, first observing Λ(1520)→γΣ⁰ and Λ(1690)→γΣ⁰, publis...

BESIII Experiment Observes Threshold Enhancement Effect in Dipion System
BESIII Experiment Observes Threshold Enhancement Effect in Dipion System

The BESIII international collaboration has observed a distinct resonance-like structure near the dipion mass threshold in charmonium decays, publis...

LHAASO's high-precision measurement of the helium spectrum above 0.1 PeV: New Clues to the Origin of High-Energy Cosmic Rays
LHAASO's high-precision measurement of the helium spectrum above 0.1 PeV: New Clues to the Origin of High-Energy Cosmic Rays

Recently, the Large High Altitude Air Shower Observatory (LHAASO) achieved a breakthrough in high-precision, element-resolved measurements of cosmi...

The Fourth Meeting of HEPS International Advisory Committee Held in Beijing
The Fourth Meeting of HEPS International Advisory Committee Held in Beijing

Huairou, Beijing, March 25-27, 2026 –The fourth meeting of High Energy Photon Source (HEPS) International Advisory Committee (IAC) was held at the...

A New Method for Predicting Individualized Onset Time of Alzheimer's Disease
A New Method for Predicting Individualized Onset Time of Alzheimer's Disease

The pathological process of Alzheimer’s disease (AD) begins decades before the onset of clinical dementia symptoms. In recent years, the efficacy ...

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