Study of D^0-D^0 mixing at a giga-Z linear collider  

作　　者：LI HaiBo 1 & YANG MaoZhi 2 1 Institute of High Energy Physics,P.O.Box 918,Beijing 100049,China 2 School of Physics,Nankai University,Tianjin 300071,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第11期1953-1956,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported in part by the National Natural Science Foundation of China (Grant Nos.10575108,10521003,10735080,10975077,10821063,10835001 and 10979008);the National Key Basic Research Program (973 by MOST) (Grant No.2009CB825200);Knowledge Innovation Key Project of Chinese Academy of Sciences (Grant No.KJCX2-YW-N29);the 100 Talents Program of CAS,and the Knowledge Innovation Project of CAS (Grant No.U-612(IHEP)

摘　　要：The possibility of studying D 0-D 0 mixing at a giga-Z linear collider "Z factory" where 10 9 hadronic Z 0 decays can be accumulated is examined.We discuss the sensitivity for the measurements of neutral D mixing parameters.These results are compared to those attainable at B factories.We find that the typical decay length of the neutral D mesons at Z factory is about 10 times larger than that at B factory.In addition,the resolution of the vertex detector of a giga-Z factory is 2-3 times better than that of B factory.The proper time resolution at Z factory is about 20-30 times better than that at B factory.Therefore the determination of the mixing parameters at a giga-Z factory is more precise.The possibility of studying D 0-D 0 mixing at a giga-Z linear collider "Z factory" where 10 9 hadronic Z 0 decays can be accumulated is examined.We discuss the sensitivity for the measurements of neutral D mixing parameters.These results are compared to those attainable at B factories.We find that the typical decay length of the neutral D mesons at Z factory is about 10 times larger than that at B factory.In addition,the resolution of the vertex detector of a giga-Z factory is 2-3 times better than that of B factory.The proper time resolution at Z factory is about 20-30 times better than that at B factory.Therefore the determination of the mixing parameters at a giga-Z factory is more precise.

关 键 词：Z FACTORY D0 MESONS MIXING B FACTORY 

分 类 号：O572.214[理学—粒子物理与原子核物理]