Meson electromagnetic form factors

The electromagnetic structure of the pseudoscalar meson nonet is completely described by the sophisticated Unitary&Analytic model, respecting all known theoretical properties of the corresponding form factors.Comment: Invited talk on 12th International Workshop on Meson Production, Properties and Interaction Krakow, Poland, 31 May - 5 June 2012. (11 latex pages, 7 eps figures

One-photon decay of the tetraquark state X(3872)→γ+J/ψX(3872) \to \gamma + J/\psi in a relativistic constituent quark model with infrared confinement

We further explore the consequences of treating the X(3872) meson as a tetraquark bound state by analyzing its one-photon decay X => \gamma + J/psi in the framework of our approach developed in previous papers which incorporates quark confinement in an effective way. To introduce electromagnetism we gauge a nonlocal effective Lagrangian describing the interaction of the X(3872) meson with its four constituent quarks by using the P-exponential path-independent formalism. We calculate the matrix element of the transition X => \gamma+ J/psi and prove its gauge invariance. We evaluate the X=> \gamma + J/psi decay width and the longitudinal/transverse composition of the J/psi in this decay. For a reasonable value of the size parameter of the X(3872) meson we find consistency with the available experimental data. We also calculate the helicity and multipole amplitudes of the process, and describe how they can be obtained from the covariant transition amplitude by covariant projection.Comment: 13 pages, 5 figures. Typos corrected, version matching the one published in PR

Study on the Strategies of China Telecom Billing Solution

要满足中国电信未来的市场竞争策略，提升中国电信的市场地位。计费系统作为企业核心竞争力IT支撑系统的核心，必须满足日益复杂、多变的客户体验要求，提供融合业务支撑服务。 通过分析未来的市场运营环境，以及两种主要计费方案的优缺点，作者针对中国电信的企业信息化战略，提出了能够满足综合信息服务，聚焦客户的品牌经营，精确管理和全网运营要求的新的计费整体解决方案---NG-Billing。 新的计费整体解决方案结合了智能网在线计费方案与准实时计费方案的优点，用在线计费系统处理信用度较低用户和高费用高风险业务的计费，用准实时计费处理信用度较高用户的计费，并基于SID提供统一信息视图的整体计费解决方案。这一...To fulfill China Telecom’s future market competition strategy, and rise the ranking in China Telecom industry, the billing solution, as the core part of IT supporting system, has to meet the complexity and variable requirements and provides convergence service. By analysis of the future market operation needs, and current billing solutions’ advantages and disadvantages, following the China Telec...学位：管理学硕士院系专业：管理学院企业管理系_管理经济学学号：X20041500

Electromagnetic structure of Adrons and Analytical Characteristics of Form Factors Thereof

Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio