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南京師范大學正式加入Belle II國際合作組

在10月18日至25日剛剛舉辦的第34屆Belle II國際合作組會議上,經合作組成員投票同意,南京師范大學繼中國的高能所、北大、中科大、北航、復旦、遼寧師大、蘇州大學和山東大學成為Belle II國際合作組的一名正式成員——中國在Belle II的第九名成員。南京師范大學物理科學與技術學院的易凱(YI KAI)教授、鐘彬副教授成為南京師范大學在Belle II的首批合作組成員,其中,易凱教授擔任南師在Belle II的負責人。

Belle II國際合作組實驗位于日本筑波市的高能加速器研究機構(KEK),其前身是第一代B介子工廠Belle實驗。Belle合作組及在美國的另一個B介子工廠BaBar實驗2001年在B介子系統中觀測到CP破壞(正反物質不對稱)過程,日本的理論學家小林誠和益川敏英因為事先預測這一結果而獲得了2008年諾貝爾物理學獎。

2010年,隨著Belle實驗運行結束,KEK聯合多家合作單位決定將B介子工廠全面升級為超級B介子工廠。其中,加速器首次采用了納米級的束流技術,其設計對撞亮度比之前提高了近40倍,達到世界最高對撞亮度。與此同時,KEK對探測器也進行了全面的升級。Belle II目前共有來自26個國家和地區116個合作單位的約1000名科學家共同參與,其主要物理目標包括研究正反物質不對稱、尋找超出標準模型的新物理、研究味物理及強子物理等。Belle II實驗 已于今年春天開始正式運行并采集實驗數據。預計未來Belle II將積累相當于其前身Belle實驗100倍的數據樣本,在高精度前沿領域的研究上做出獨特的貢獻。

南京師范大學粒子物理與核物理團隊已經在2005年加入了北京正負電子對撞機BES國際合作組,新的實驗小組將和團隊全體成員互補合作,力爭在Belle II實驗中做出南師獨特的貢獻,提高南京師范大學在國際上的聲譽并拓展其國際影響力。

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Nanjing Normal University joined Belle II international Collaboration


Nanjing Normal University became a member of Belle II collaboration—the ninth member from China, voted by Belle II Institution Board members in the Belle II 34thcollaboration meeting held in Japan from October 18 to 25, 2019. Prof. Kai Yi (contact person) and Associate Prof. Bin Zhong from the School of Physics and Technology are the first two members from Nanjing Normal University.

The Belle II is a new experiment located in Japan to study B physics after the Belle experiment which was one of the two B factories in the world before 2010. Another B factory, called Babar, was located in the Stanford Linear Accelerator Center in the united states. The two B-factory experiments observed the first large signals for CP violation (matter-antimatter asymmetries) in the B meson sector in 2001, which led to the 2008 Nobel Prize in Physics for Kobayashi and Maskawa.

An upgrade of both the accelerator and detector of Belle experiment was started in 2010, which is also the start of the Belle II experiment.The Belle II accelerator (SuperKEKB) is designed to achieve a peak luminosity a factor of forty times higher than the Belle accelerator, and all the Belle II sub-detectors have been upgraded to have much better performance. The Belle II experiment, one of the intensity frontiers in the world, has started to take data since this spring. It currently has about 1000 collaborators from more than 100 institutions in 26 different counties and regions, with a focus on studying CP violation, possible physics beyond the standard model, flavor physics and hadron physics. The total data to be accumulated at Belle II is expected to be 100 times of that accumulated by Belle experiment.

Nanjing Normal University has joined the BES (Beijing Spectrometer) experiment in 2005, another international collaboration located in Beijing, China. The new Belle II team will try to make unique contributions to earn international scientific honor, with help from the existing Particle Physics and Nuclear Physics team at Nanjing Normal University.

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    2019年11月04日

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