The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics community.It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of...The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics community.It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or higher.The STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard Model.The STCF project in China is under development with an extensive R&D program.This document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.展开更多
Physical Background The Kunming Lake,with an area of 324 sq.km.during its flood water time,is the largest lake in Eastern Yunnan.More than twenty streams from the surrounding mountains empty into the lake which is dra...Physical Background The Kunming Lake,with an area of 324 sq.km.during its flood water time,is the largest lake in Eastern Yunnan.More than twenty streams from the surrounding mountains empty into the lake which is drained by the TangLang River to the upper Yangtze.展开更多
Tsunyi,one of the,largest cities in Kweichow Province,is situated at388 km.south of Chungking and r60 kin.north of Kweiyang.The presentpaper,deals with a small region around Tsunyi City;about 35 km.long and22 kin.wide...Tsunyi,one of the,largest cities in Kweichow Province,is situated at388 km.south of Chungking and r60 kin.north of Kweiyang.The presentpaper,deals with a small region around Tsunyi City;about 35 km.long and22 kin.wide(Fig.I).展开更多
In an agricultural country like China,with 3/4 of her people tilling soil for their living,land forms the principal source of the nation's wealth.The improvement of the living standard and indeed,the reconst-ructi...In an agricultural country like China,with 3/4 of her people tilling soil for their living,land forms the principal source of the nation's wealth.The improvement of the living standard and indeed,the reconst-ruction of the country at large,must depend on a thorough under-stan-di g of the presentconditions of land utilization so thatmeaures may be taken for rational use of nturalresources.展开更多
The importance of relative relief as a geographic factor is gradually being realized,but its significance in relation to both physiography and human activities has hardly been appreciated.The present paper tries to el...The importance of relative relief as a geographic factor is gradually being realized,but its significance in relation to both physiography and human activities has hardly been appreciated.The present paper tries to elucidate relative relief in its manifold relations,using Tsunyi District of Kweichow Province as an example.展开更多
基金supported by the National Key R&D Program of China under Contract No.2022YFA1602200the International Partnership Program of the Chineses Academy of Sciences under Grant No.211134KYSB20200057the STCF Key Technology Research and Development Project.
文摘The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics community.It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or higher.The STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard Model.The STCF project in China is under development with an extensive R&D program.This document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.
文摘Physical Background The Kunming Lake,with an area of 324 sq.km.during its flood water time,is the largest lake in Eastern Yunnan.More than twenty streams from the surrounding mountains empty into the lake which is drained by the TangLang River to the upper Yangtze.
文摘Tsunyi,one of the,largest cities in Kweichow Province,is situated at388 km.south of Chungking and r60 kin.north of Kweiyang.The presentpaper,deals with a small region around Tsunyi City;about 35 km.long and22 kin.wide(Fig.I).
文摘In an agricultural country like China,with 3/4 of her people tilling soil for their living,land forms the principal source of the nation's wealth.The improvement of the living standard and indeed,the reconst-ruction of the country at large,must depend on a thorough under-stan-di g of the presentconditions of land utilization so thatmeaures may be taken for rational use of nturalresources.
文摘The importance of relative relief as a geographic factor is gradually being realized,but its significance in relation to both physiography and human activities has hardly been appreciated.The present paper tries to elucidate relative relief in its manifold relations,using Tsunyi District of Kweichow Province as an example.
