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Monte Carlo Study on Singly Tagged D Mesons at BES-III

ZHAO Ming-Gang,YU Chun-Xu,LI Xue-Qian,

中国物理快报 , 2009,
Abstract: We present Monte Carlo studies on the singly tagged D mesons, which are crucial in the absolute measurements of D meson decays, based on a full Monte Carlo simulation for the BES-III detector, with the BES-III Offline Software System. The expected detection efficiencies and mass resolutions of the tagged D mesons are well estimated.
$η$ and $η^\prime$ Physics at BES-III  [PDF]
Hai-Bo Li
Physics , 2009, DOI: 10.1088/0954-3899/36/8/085009
Abstract: Decays of both $\eta$ and $\eta^\prime$ provide very useful information in our understanding of low-energy QCD, and experimental signatures for these decays would be extremely helpful at BES-III. The rare decays of the $\eta$ and $\eta^\prime$ mesons could serve as a low-energy test of the Standard Model and its beyond. The sensitivities of the measurements of $\eta$ and $\eta^\prime$ decays are discussed at BES-III, in which the $\eta$ and $\eta^\prime$ mesons are produced in the $\psi$ decays.
Physics at BES-III
Asner, D. M.;Barnes, T.;Bian, J. M.;Bigi, I. I.;Brambilla, N.;Boyko, I. R.;Bytev, V.;Chao, K. T.;Charles, J.;Chen, H. X.;Chen, J. C.;Chen, Y.;Chen, Y. Q.;Cheng, H. Y.;Dedovich, D.;Descotes-Genon, S.;Fu, C. D.;Tormo, X. Garcia i;Gao, Y. -N.;He, K. L.;He, Z. G.;Hu, J. F.;Hu, H. M.;Huang, B.;Jia, Y.;Jin, H. -Y.;Jin, S.;Kuang, Y. P.;Lacker, H.;Li, H. B.;Li, J. L.;Li, W. D.;Li, X. Y.;Liu, B. J.;Liu, H. H.;Liu, J.;Ma, H. L.;Ma, J. P.;Mao, Y. J.;Mo, X. H.;Olsen, S. L.;Pich, A.;Pineda, A.;Ping, R. G.;Qiao, C. F.;Qin, G.;Qin, H.;Roney, J. M.;Rong, G.;Roos, L.;Shen, X. Y.;Soto, J.;Stahl, A.;Sun, S. S.;T'Jampens, S.;Vairo, A.;Wang, P.;Wang, Y. F.;Wang, Y. K.;Wu, N.;Wu, Y. L.;Xing, Z. Z.;Xu, G. F.;Xu, M.;Yang, M.;Yang, M. Z.;Yang, Y. D.;Yuan, C. Z.;Zhang, D. H.;Zhang, D. Y.;Zhang, J. Y.;Zhang, Z. X.;Zhang, X. M.;Zhang, X. Y.;Zhang, Y. J.;Zhao, Q.;Zhemchugov, A.;Zheng, H. Q.;Zheng, Y. H.;Zhong, M.;Zhu, S. -L.;Zhu, Y. S.;Zhuravlov, V.;Zou, B. S.;Zou, J. H.
High Energy Physics - Phenomenology , 2008,
Abstract: This physics book provides detailed discussions on important topics in $\tau$-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental techniques for Dalitz-plot analyses, analysis tools to extract absolute branching fractions and measurements of decay constants, form factors, and CP-violation and \DzDzb-oscillation parameters. Programs of QCD studies and near-threshold tau-lepton physics measurements are also discussed.
Physics at BES-III  [PDF]
D. M. Asner,T. Barnes,J. M. Bian,I. I. Bigi,N. Brambilla,I. R. Boyko,V. Bytev,K. T. Chao,J. Charles,H. X. Chen,J. C. Chen,Y. Chen,Y. Q. Chen,H. Y. Cheng,D. Dedovich,S. Descotes-Genon,C. D. Fu,X. Garcia i Tormo,Y. -N. Gao,K. L. He,Z. G. He,J. F. Hu,H. M. Hu,B. Huang,Y. Jia,H. -Y. Jin,S. Jin,Y. P. Kuang,H. Lacker,H. B. Li,J. L. Li,W. D. Li,X. Y. Li,B. J. Liu,H. H. Liu,J. Liu,H. L. Ma,J. P. Ma,Y. J. Mao,X. H. Mo,S. L. Olsen,A. Pich,A. Pineda,R. G. Ping,C. F. Qiao,G. Qin,H. Qin,J. M. Roney,G. Rong,L. Roos,X. Y. Shen,J. Soto,A. Stahl,S. S. Sun,S. T'Jampens,A. Vairo,P. Wang,Y. F. Wang,Y. K. Wang,N. Wu,Y. L. Wu,Z. Z. Xing,G. F. Xu,M. Xu,M. Yang,M. Z. Yang,Y. D. Yang,C. Z. Yuan,D. H. Zhang,D. Y. Zhang,J. Y. Zhang,Z. X. Zhang,X. M. Zhang,X. Y. Zhang,Y. J. Zhang,Q. Zhao,A. Zhemchugov,H. Q. Zheng,Y. H. Zheng,M. Zhong,S. -L. Zhu,Y. S. Zhu,V. Zhuravlov,B. S. Zou,J. H. Zou
Physics , 2008,
Abstract: This physics book provides detailed discussions on important topics in $\tau$-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental techniques for Dalitz-plot analyses, analysis tools to extract absolute branching fractions and measurements of decay constants, form factors, and CP-violation and \DzDzb-oscillation parameters. Programs of QCD studies and near-threshold tau-lepton physics measurements are also discussed.
The BES-III experiment at the high luminosity Tau-Charm factory  [PDF]
Yi-Fang Wang
Physics , 2007,
Abstract: Interesting results from BES-II and other experiments raised actually many new questions which shall be answered by its upgrade program, BEPCII and BES-III. The design and current status of BEPCII and BES-III are reported.
Probing Dark force at BES-III/BEPCII  [PDF]
Hai-Bo Li,Tao Luo
Physics , 2009, DOI: 10.1016/j.physletb.2010.02.059
Abstract: We study an experimental search of a GeV scale vector boson at BES-III/BEPCII. It is responsible for mediating a new U(1)$_d$ interaction, as recently exploited in the context of weakly interacting massive particle dark matter. At low energy $e^+ e^-$ colliders this dark state can be efficiently probed. We discuss the direct productions of this light vector $U$ boson and the decay of this state with BES-III data and its foreseen larger data. In particular, we show that Higgs' strahlung in the dark sector can lead to multilepton signatures, which probe the physics range for kinetic mixing parameter $\epsilon \sim 10^{-4} -10^{-3}$ over a large portion of the parameter space.
Probe $Λ- \barΛ$ oscillation in $J/ψ\rightarrow Λ\,\barΛ$ decay at BES-III  [PDF]
X. W. Kang,H. B. Li,G. R. Lu
Physics , 2010,
Abstract: We discuss the possible searching for the oscillation by coherent $\Lambda\bar{\Lambda}$ production in $J/\psi \rightarrow \Lambda \bar{\Lambda}$ decay process. The sensitivity of measurement of $\Lambda - \bar{\Lambda}$ oscillation in the external field at BES-III experiment is considered. These considerations indicate an alternative way to probe the $\Delta B =2$ amplitude in addition to neutron oscillation experiments. Both coherent and time-dependent information can be used to extract $\Lambda -\bar{\Lambda}$ oscillation parameter. With one year's luminosity at BES-III, we can set an upper limit of $\delta m < 10^{-15}$ MeV at 90% confidence level, corresponding to about $10^{-6}$ s of $\Lam-\Lamb$ oscillation time.
Improvement of Beam Energy Measurement System for BES-III  [PDF]
Jianyong Zhang, Xiao Cai, Xiaohu Mochizuki, Muchnoi Nickolai, Achasov Mikhail, Elena Abakumova, Harris Fred
World Journal of Nuclear Science and Technology (WJNST) , 2016, DOI: 10.4236/wjnst.2016.64025
Abstract: The beam energy measurement system is significant and profit for both BES-III detector and BEPC-II accelerator. The detection of the high energy scattering photons is realized by virtue of the Compton backscattering principle. Many advanced techniques and precise instruments are employed to acquire the highly accurate measurement of positron/electron beam energy. During five years’ running period, in order to satisfy the requirement of data taking and enhance the capacity of measurement itself, the upgradation of system is continued, which involves the components reformation of laser and optics subsystem, replacement of view-port of the laser to vacuum insertion subsystem, the usage of electric cooling system for high purity germanium detector, and the refinement of data acquisition and processing subsystem. The upgrading of system guarantees the smooth and effective measuring of beam energy at BEPC-II and accommodates the accurate offline energy values for further physics analysis at BES-III.
Experimental sensitivity on searching for CP violation at BES-III

Zhao Ming-Gang,Rong Gang,Ma Hai-Long,Zhang Da-Hua,

中国物理 B , 2009,
Abstract: The $CP$ violation in the $D$ system is predicted to be an unobserved level in the Standard Model. In this paper, we describe the method of searching for $CP$ violation decay processes with the coherently produced $D^0\bar D^0$ mesons from the $\psi(3770)$ decay. The $CP$ violation decay processes can be searched for at the BES-III experiment. The experimental sensitivity for searching for the $CP$ violation can reach about a $10^{-4}$ level with a $\psi(3770)$ data sample of about $20$ fb$^{-1}$.
Study of a0(980)-f0(980) mixing at BES III and study of charged kappa at BES II  [PDF]
Beijiang Liu
Physics , 2010,
Abstract: Recent BES results on light scalars are reported in this talk, including the observation of a charged kappa decaying to K pi0 with 5.8 * 10^7 J/psi data at BES II and the direct measurements of a0(980)-f0(980) mixing in the processes J/psi --> phi f0(980) --> phi a0(980) --> phi eta pi0 and chi_c1 --> pi0 a0(980) --> pi0 f0(980) --> pi0 pi+ pi- with 2.26 * 10^8 J/psi data and 1.06 * 10^8 psi' data at BES III.
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