X Y Z particles at BABAR

作     者：E.Prencipe 

作者机构：LAPP-Laboratoire de Annecy de Physique de Particules 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2010年第34卷第6期

页      面：644-649页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the US Department of Energy and National Science Foundation the Natural Sciences and Engineering Research Council (Canada) the Commissariat a l'Energie Atomique and Institut National de Physique Nucleaire et de Physique des Particules (France) the Bundesministerium fur Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany) the Istituto Nazionale di Fisica Nucleare (Italy) the Foundation for Fundamental Research on Matter (The Netherlands) the Research Council of Norway,the Ministry of Education and Science of the Russian Federation,Ministerio de Educacion y Ciencia (Spain) the Science and Technology Facilities Council (United Kingdom) Individuals have received support from the Marie-Curie IEF program (European Union) the A.P.Sloan Foundation 

主　　题：spectroscopy charmonium BABAR 

摘      要：This paper intends to shortly summarize the recent results on Spectroscopy, published from the BABAR Collaboration. The BABAR experiment is a B-factory, at SLAC, where asymmetric energy beams of electron-positron are accelerated and collide at the energy in the center of mass of T（4S）. In 9 years of data taking, BABAR had collected 433 fb^-1 equivalent luminosity on-peak-data at the T（4S） energy, 30 fb^-1 data at the T（3S） energy, 15 fb^-1 data at the T（2S） energy, and a scan around T（4S） was done, collecting 25 pb^-1 every 5 MeV. Thanks to the high luminosity achieved, it is possible to perform high precision measurements, and spectroscopy studies. An update on the measurement of the state X（3872） will be given, as final result published by using the whole dataset available. Then, a new preliminary Y（4260） measurement is reported, and the study of the invariant mass J/ψπ^＋π^- in ISR events is shown, where no evidence of the state Y（4050） is highlighted. As conclusion, the results on the angular distribution analysis performed on the state Z（4430） are reported.