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2018年6月27日至7月1日，BESⅢ国际合作组2018年夏季会议在中国科学院高能物理研究所举办。来自北京大学等18家国内合作单位和来自德国、意大利、俄罗斯、瑞典、英国、美国、巴基斯坦等国外合作单位的一百多名学者和研究生参加了会议。会议由BESⅢ国际合作组发言人苑长征研究员主持。
Physics program of open charm and heavy cc states at the BES-Ⅲ experiment
D semileptonic decays D+(s) purely leptonic decays CKM matrix elements Standard Model D0D0 mixing CP violation in D decays
2010/5/7
We present the physics program of the open charm and heavy cc states above the DD production energy threshold, which will be studied with the BES-Ⅲ detector at the BEPC-Ⅱ collider in the coming years....
Primary vertex reconstruction based on the Kalman filter technique at BESⅢ
primary vertex Kalman method BESⅢ
2009/12/24
Primary vertex reconstruction is crucial to estimate the beam profile in collision experiments. We study the principle of an iterative process, called the Kalman filter method, and apply it to primary...
The absolute energy calibration with photons from π0's for the BESⅢ EMC is discussed. Using 3 million hadronic events, the preliminary results are
presented. Precision of about 1% in the photon energ...
BESⅢ track fitting algorithm
BESⅢ main drift chamber track fitting algorithm Kalman filter method
2009/9/17
A track fitting algorithm based on the Kalman filter method has been developed for BESⅢ of BEPCⅡ. The effects of multiple scattering and energy loss when the charged particles go through the detecto...
Monte Carlo study on the low momentum μ-π identification of the BESⅢ EM calorimeter
BESⅢ calorimeter particle identification artificial neural network
2009/9/17
The BESⅢ detector has a high-resolution electromagnetic calorimeter which can be used for low momentum μ-π identification. Based on Monte Carlo simulations, μ-π separation was studied. A multilayer pe...
The recent observations of the purely leptonic decay Ds+→μ+νμ and τ+ντ at CLEO-c and B factory may allow a possible contribution from a charged Higgs boson. One such measurement of the decay constant ...
A simulation study on the measurement of D0-D0 mixing parameter y at BESⅢ
likelihood electron identification D0-D0 mixing mixing parameter y
2009/8/17
We established a method on measuring the D0-D0 mixing parameter y for BESⅢ experiment at the BEPCⅡ e+e－ collider. In this method, the doubly tagged π(3770) →D0-D0 events, with one D decays to CP-eigen...
Recently, both BaBar and Belle experiments found evidences of neutral D mixing. In this paper, we discuss the sensitivities of the measurements of D mixing parameters at BESⅢ. With CP tag technique at...
We present a brief remark and introduction to event generators for tau-charm physics currently used at BESⅢ, including KKMC, BesEvtGen, Bhlumi, Bhwide, Babayaga and inclusive Monte-Carlo event generat...
Design and implementation of the detector control system for the BESⅢ drift chamber cosmic ray test
Detector Control System drift chamber LabVIEW
2009/8/14
After the construction of the BESⅢ drift chamber, a long period of cosmic rays test is necessary to verify its performance. This also provides a good opportunity to integrate the detector readout ele...
Design and assembly of the CsI(Tl) crystal module of the BESⅢ electro-magnetic calorimeter
BESⅢ electro-magnetic calorimeter CsI(Tl) crystal crystal module
2009/8/14
The CsI(Tl) crystal modules of the Beijing Spectrometer Ⅲ (BESⅢ) electro-magnetic calorimeter (EMC) were designed and assembled through Monte Carlo simulation and experiments. After the assembly was ...
Determination of event start time at BESⅢ
event start time time-of-flight drift-chamber track reconstruction
2009/8/14
The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the per...
Installation and cosmic ray test of the high voltage system of the BESⅢ drift chamber
BESⅢ drift chamber high voltage system cosmic ray test installation
2009/8/14
After examination of the designed high voltage power supply system of the BESⅢ drift chamber in the beam test of the full length prototype of drift chamber, a full system covering all the channels of ...