主講人(Lecturer)：Prof. Richard M. Talman, Cornell University,USA 

　　主持人(Chair)：Prof. Chuang Zhang, IHEP 

　　講座題目(Theme)：The Luminosity of Circular e+e- Higgs Factories 

　　內(nèi)容摘要 (Abstract)： 

　　The luminosity of circular e+e- Higgs Factories is discussed. It is shown that a single ring is superior to two rings. Beam separation is possible over the energy range from Z0 through Higgs to WW threshold. For various reasons it will be difficult to reduce the vertical beta function at the crossing point below 1 cm. Naively, this would cause a reduction in luminosity by a factor of 10 compared to the 1 mm value that some people have (optimistically but erroneously) adopted. But it is shown that the reduction in luminosity will only be about a factor of three, not ten (because the beam-beam tune-shift parameter can be increased). 

　　演講人簡介 (Lecturer’s short bio): 

　　I grew up in London, Canada, attended Ryerson (the same public school as Dave Jackson and Roger Penrose) and received B.A. and M.A. (mathematics) at University of Western Ontario.  I received PhD in Physics at Caltech in 1962 and have been at Cornell University ever since.  Initially I did experimental particle physics, for example building dE/dx detector of CLEO at CESR. Since then I have mainly been involved in accelerator physics, (sadly) including being group leader of instrumentation Group at the SSC. 

　　（參加此系列講座可計(jì)入職工繼續(xù)教育2小時(shí)）(Permanent Education Program) 

　　時(shí)間 (Time)：2014年5月13日（星期二）下午14：00 (May 13, 14:00) 

　　地點(diǎn) (Place)：5#廳二樓會(huì)議室（Hall No.5, Meeting Room）