Latest News
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China Focus: China, Denmark to deepen cooperation on green innovation
BEIJING, May 21 (Xinhua) -- Senior officials and scholars from China and Denmark have pledged to deepen cooperation on green innovation during an event marking the 75th anniversary of diplomatic relations between the two countries.
Scientific and technological cooperation has always been an important part of China-Denmark relations, contributing significantly to economic development, social progress, and the improvement of people's livelihoods in both countries, noted Chinese Minister of Science and Technology Yin Hejun.
He made the remarks while addressing the China-Denmark Green Research & Innovation Day, held simultaneously in Beijing and Copenhagen on Monday (Beijing time).
In the face of pressing global challenges like climate change, it is more important than ever for countries, including China and Denmark, to strengthen exchanges and cooperation in jointly advancing green and zero-carbon sustainable development, he said.
Yin emphasized green innovation as a key direction in bilateral sci-tech cooperation. China is steadfast in pursuing its green development path, he stressed, noting that Denmark, a global pioneer in the green transition, has achieved remarkable success in renewable energy, green transportation and resource recycling that offer valuable lessons for China.
Monday's event was jointly hosted by China's Ministry of Science and Technology and Denmark's Ministry of Higher Education and Science. It featured a series of activities, including the China-Denmark Cooperation Forum on Science, Technology and Innovation. The Beijing venue of the event was the Sino-Danish College (SDC) under the University of Chinese Academy of Sciences.
The two countries signed a number of cooperation agreements covering policy alignment, technological research and development, and industrial incubation at the event.
Speaking at the event, Chinese Ambassador to Denmark Wang Xuefeng said that China and Denmark share broad consensus on addressing climate change, advancing global sustainable development, and promoting open international cooperation in science and technology.
China is ready to work with Denmark through cooperation in sci-tech innovation to explore solutions to global challenges, jointly address the challenges of the times, foster shared peace and development, and help build a global sci-tech community, Wang noted.
Christina Egelund, Minister of Higher Education and Science of Denmark, delivered a speech at the event and reaffirmed commitments of the two countries to addressing global challenges and taking effective action to promote a stronger, greener and healthier global development.
"We have agreed to work towards these goals by cooperating in areas of mutual interest within science, technology, innovation and higher education," she said, adding that the event proved that "we are committed to putting action into achieving our shared goals."
Anders Siegumfeldt, Deputy Head of Mission at the Embassy of Denmark in Beijing, said in his video speech that China and Denmark do share a common goal of building greener societies.
Highlighting Denmark's collaboration with Chinese institutions and businesses on innovative solutions -- from offshore wind and green urban planning to sustainable agriculture and clean energy systems -- he called for the two countries to continue working together toward a more sustainable and prosperous future.
China and Denmark have jointly convened 21 sessions of the Joint Committee Meeting on Scientific and Technological Cooperation. The cooperation in technological innovation between the two countries has continued to deepen, with increasingly close connections between science and technology authorities, universities, research institutions, and enterprises. Significant achievements have been made in scientific collaboration and exchanges across fields such as energy, environment, water resources, healthcare, agriculture, and green development.
Source: Xinhua
Editor: GAO Yuan
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Research News
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Breakthrough: CP Violation Established in Bayron Decays
At the 59th “Rencontres de Moriond EW", the LHCb collaboration announced a landmark discovery: the first observation of Charge-Parity (CP) violation in baryon decays. This breakthrough may provide further insight into one of the universe’s most profound mysteries: why matter dominates over antimatter. The research team led by Professor Zheng Yangheng and Qian Wenbin from the University of Chinese Academy of Sciences (UCAS) played an important role in this achievement.
According to the Big Bang theory, matter and antimatter should have been created in equal amounts 13.8 billion years ago. Yet today, our universe is made almost entirely of matter. CP violation—a subtle asymmetry in how particles and antiparticles behave—is essential to explain this imbalance. While CP violation was first detected in mesons (particles made of quark-antiquark pairs) in 1964 (a discovery awarded the Nobel Prize), it had never been observed in baryons (three-quark particles like protons and neutrons) until now.
The LHCb team, including UCAS scientists, analyzed proton-proton collision data from the LHCb detector and observed a statistically significant difference (exceeding five standard deviations) between the decay rates of bottom baryons and anti-bottom baryons. This definitive sign of CP violation in baryon decays fills a six-decade gap in particle physics. Baryons, the building blocks of visible matter, may hold the key to understanding the universe’s matter-antimatter asymmetry. This discovery not only confirms a key prediction of the Standard Model but also opens new avenues to explore physics beyond it.
Figure 1: LHCb data showing the asymmetry between (left) bottom baryon and (right) anti-bottom baryon decays, marking the first discovery of CP violation in baryon decays.
The LHCb collaboration comprises approximately 1,800 researchers from 100 institutions across 24 countries. Since joining in 2015, researchers from UCAS have made significant contributions, including precision measurements of CP-violation phases, hadron spectroscopy studies, and investigations into heavy-flavor hadron production. Their work has led to several important discoveries, including a new type of CP violation in charmless three-body B decays and the observation of hadronic states like the double-charmed baryon and doubly charged tetraquark.
“To track down CP violation in baryon decays, we first identified all the potential decay channels and worked together with collaborators to analyze each one”, explained Associate Professor Qian Wenbin. “Completing these studies required more than a decade of dedicated work”, said Professor Zheng Yangheng. Beyond the current breakthrough, their team recently reported evidence of CP violation in a specific three-body baryon decay mode, published as an Editor's Suggestion in Physical Review Letters (March 12, 2025), and featured in Physics.
The definitive observation of CP violation in baryons opens a new window for future studies. With further upgrades of the detector, physicists in the LHCb collaboration are now poised to study CP violation with unprecedented precision. These advances could help us reconstruct the pivotal moments 13.8 billion years ago that determined the survival of matter over antimatter, bringing us closer to solving one of science's greatest mysteries.
Further readings:
LHCb preprint on discovery of CP violation in baryon decays：https://arxiv.org/abs/2503.16954
LHCb publication on evidence of CP violation in baryon decays：https://doi.org/10.1103/PhysRevLett.134.101802
News from APS：https://physics.aps.org/articles/v18/56
LHCb news：https://lhcb-outreach.web.cern.ch/2025/03/25/observation-of-the-different-behaviour-of-baryonic-matter-and-antimatter/ and https://lhcb-outreach.web.cern.ch/2024/11/08/
CERN news：https://home.cern/news/press-release/physics/new-piece-matter-antimatter-puzzle
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