منابع مشابه
First results of the RPC commissioning at BESIII
The commissioning of the RPC-based muon detector in the BESIII experiment has been carried out. The RPC modules, front-end electronics, online and offline software of the muon system have been studied. The detector performances including efficiency, counting rate, noise ratio, spacial resolution, dark current, and muon charge ratio were obtained by cosmic ray data with and without magnetic fiel...
متن کاملBEPCII and BESIII
The Beijing Electron Collider is being upgraded (BEPCII) to a two-ring collider with a design luminosity of 1 × 10cm s at a center-of-mass energy of 3.89 GeV. It will operate between 2 and 4.2 GeV in the center of mass. With this luminosity, the BESIII detector will be able to collect, for example, 10 billion J/ψ events in one year of running. This will be a unique facility in the world opening...
متن کاملRecent highlights from BESIII: XYZ states
In this contribution we review recent results from the BESIII experiment. We focus on the investigation of XYZ states and the discovery of new charged charmonium like structures. Two isospin triplets Z(3900) and Z(4020) have been discovered, decaying into π±J/ψ and π±hc, respectively. Structures with compatible parameters have been found decaying to DD̄∗ and D∗D̄∗, respectively, suggesting that t...
متن کاملSearch for the lepton flavor violation process J = c ! e at BESIII
M. Ablikim, M.N. Achasov, O. Albayrak, D. J. Ambrose, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, J. Becker, J. V. Bennett, M. Bertani, J.M. Bian, E. Boger,* O. Bondarenko, I. Boyko, R. A. Briere, V. Bytev, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov,* G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, Y. B. Chen, H. P. Che...
متن کاملSpan Efficiencies of Wings at Low Reynolds Numbers
Elegant and inviscid analytical theory can predict the induced drag on lifting wings of finite span. The theoretical prediction is then often modified by multiplication with a dimensionless coefficient for which the departure from a value of 1 is used as a way to incorporate realistic and necessary departures from the idealizedmodel. Unfortunately, there are conflicting definitions of these dim...
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ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2010
ISSN: 1674-1137
DOI: 10.1088/1674-1137/34/12/001