Fast Simulation Software Research Articles

Prospects of CP violation in Λ decay with a polarized electron beam at the STCF* *Supported by the National Key R&D Program of China (2022YFA1602200), the Science and Technology Innovation Program of Hunan Province, China (2020RC3054) and the International Partnership Program of the Chinese Academy of Sciences (211134KYSB20200057)

Based on Monte Carlo (MC) events produced from a longitudinally-polarized electron beam, the sensitivity of the violation of Λ decay is studied using fast simulation software. In addition, the decay can be used to optimize the detector response using the interface provided by the fast simulation software. In the future, the STCF is expected to obtain 3.4 trillion events, and the statistical sensitivity of the violation of Λ decay via the process is expected to reach when the electron beam polarization is 80%.

Sensitivity of CP violation of Λ decay in J/ψ → ΛΛ̄ at STCF

The process of [Formula: see text] is studied using [Formula: see text] [Formula: see text] Monte Carlo (MC) events at [Formula: see text] GeV with a fast simulation software at future Super Tau Charm Facility (STCF). The statistical sensitivity for CP violation is determined to be the order of [Formula: see text] by measuring the asymmetric parameters of the [Formula: see text] decay. Furthermore, the decay of [Formula: see text] also serves as a benchmark process to optimize the detector responses using the interface provided by the fast simulation software.

Feasibility study of D_s^+ rightarrow tau ^+ nu _{tau } decay and test of lepton flavor universality with leptonic D_s^+ decays at STCF

We report a sensitive study of D_s^+ rightarrow tau ^+ nu _{tau } decay via tau ^+ rightarrow e^+ nu _e bar{nu }_{tau } with an integrated luminosity of 1 ab^{-1} at the center-of-mass energy of 4.009 GeV at a future Super Tau Charm Facility (STCF). Under the help of the fast simulation software package, the statistical sensitivity for the absolute branching fraction of D_s^+ rightarrow tau ^+ nu _{tau } is determined to be 2times 10^{-4}. Combining with our previous prospect of D_s^+ rightarrow mu ^+ nu _{mu }, the ratio of the branching fractions for D_s^+ rightarrow tau ^+ nu _{tau } over D_s^+ rightarrow mu ^+ nu _{mu } can achieve a relative statistical precision of 0.5%, which will provide the most stringent test of the tau -mu lepton flavor universality in heavy quark decays. Taking the decay constant f_{D_s^+} from lattice QCD calculations or the CKM matrix element |V_{cs}| from the CKMfitter group as an input, the relative statistical uncertainties for |V_{cs}| and f_{D_s^+} are estimated to be 0.3% and 0.2%, respectively.

Prospects of CKM elements |V_{cs}| and decay constant f_{D_{s}^+} in D_s^+rightarrow mu ^+nu _mu decay at STCF

We report a feasibility study of pure leptonic decay D_s^+rightarrow mu ^+nu _mu by using a fast simulation software package at STCF. With an expected luminosity of 1~mathrm {ab}^{-1} collected at STCF at a center-of-mass energy of 4.009 GeV, the statistical sensitivity of the branching fraction is determined to be 0.3%. Combining this result with the c rightarrow s quark mixing matrix element |V_{cs}| determined from the current global Standard Model fit, the statistical sensitivity of D_s^+ decay constant, f_{D_s^+}, is estimated to be 0.2%. Alternatively, combining the current results of f_{D_s^+} calculated by lattice QCD, the statistical sensitivity of |V_{cs}| is determined to be 0.2%, which helps probe possible new physics beyond Standard Model. The unprecedented precision to be achieved at STCF will provide a precise calibration of QCD and rigorous test of Standard Model.

Time Resolution of the 4H-SiC PIN Detector

We address the determination of the time resolution for the 100 μm 4H-SiC PIN detectors fabricated by Nanjing University (NJU). The time response to β particles from a 90Sr source is investigated for the detection of the minimum ionizing particles (MIPs). We study the influence of different reverse voltages, which correspond to different carrier velocities and device sizes, and how this correlates with the detector capacitance. We determine a time resolution (94 ± 1) ps for a 100 μm 4H-SiC PIN detector. A fast simulation software, termed RASER (RAdiation SEmiconductoR), is developed and validated by comparing the waveform obtained from simulated and measured data. The simulated time resolution is (73 ± 1) ps after considering the intrinsic leading contributions of the detector to time resolution.

Feasibility study of measuring brightarrow sgamma photon polarisation in D^0rightarrow K_1(1270)^- e^+nu _e at STCF

We report a sensitive study of measuring brightarrow sgamma photon polarisation in D^{0}rightarrow K_1(1270)^-e^+nu _e with an integrated luminosity of mathscr {L} = 1 ab^{-1} at a center-of-mass energy of 3.773 GeV at a future Super Tau Charm Facility. More than 61,000 signals of D^{0}rightarrow K_1(1270)^-e^+nu _e are expected. Based on a fast simulation software package, the statistical sensitivity for the ratio of up-down asymmetry is estimated to be 1.5times 10^{-2} by performing a two-dimensional angular analysis in D^{0}rightarrow K_1(1270)^-e^+nu _e. Combining with measurements of up-down asymmetry in Brightarrow K_1gamma , the photon polarisation in brightarrow sgamma can be determined model-independently.

Feasibility study of CP violation in decays at the Super Tau Charm Facility * *Supported by the Double First-Class university project foundation of USTC, USTC Research Funds of the Double First-Class Initiative YD2030002005 and the National Natural Science Foundation of China (11625523). The author XWK is supported by the National Natural Science Foundation of China (11805012) and the Fundamental Research

We report a feasibility study for violation in decays at a Super Tau Charm Facility (STCF). With an expected luminosity of 1 ab collected by STCF per year at a center-of-mass energy of 4.26 GeV, the statistical sensitivity for CP violation is determined to be of order by measuring the decay-rate difference between and . The analysis is performed using a reliable fast simulation software package, which can describe the detector responses properly and vary the responses flexibly for further optimization. Moreover, the energy-dependent efficiencies for reconstructing are presented. The expected CP sensitivity is proportional to in the energy region from 4.0 to 5.0 GeV. The sensitivity of CP violation is of order with 10 ab integrated luminosity, which is equivalent to ten years' data taking in this energy region at STCF.

Wind turbine control: open-source software for control education, standardization and compilation

Standardized, easy to use, and preferably open-source research software is an important aspect in supporting and solidifying the wind turbine community. To this end, three contributions in the form of open-source software projects are presented in this paper. First, a community-driven wind turbine baseline controller, the Delft Research Controller (DRC), is presented. The DRC is applicable to high-fidelity simulation software that uses the DISCON controller interface. The controller distinguishes itself by the variety of available control and estimation implementations, its ease of use, and the universal applicability to wind turbine models. Secondly, in the wake of the DRC, the SimulinkDRC graphical controller design and compilation environment has been developed. Users having access to Simulink can benefit from the convenient way of controller development the tool provides. Finally, the FASTTool has been developed for educational purposes, by focusing on the graphical aspect of wind turbine (controller) design. The tool simplifies interaction with the advanced FAST simulation software, by comprehensive visualizations and analysis tools. This paper demonstrates and describes the functionality of all three software projects.

SMARTPOP: inferring the impact of social dynamics on genetic diversity through high speed simulations.

BackgroundSocial behavior has long been known to influence patterns of genetic diversity, but the effect of social processes on population genetics remains poorly quantified – partly due to limited community-level genetic sampling (which is increasingly being remedied), and partly to a lack of fast simulation software to jointly model genetic evolution and complex social behavior, such as marriage rules.ResultsTo fill this gap, we have developed SMARTPOP – a fast, forward-in-time genetic simulator – to facilitate large-scale statistical inference on interactions between social factors, such as mating systems, and population genetic diversity. By simultaneously modeling genetic inheritance and dynamic social processes at the level of the individual, SMARTPOP can simulate a wide range of genetic systems (autosomal, X-linked, Y chromosomal and mitochondrial DNA) under a range of mating systems and demographic models. Specifically designed to enable resource-intensive statistical inference tasks, such as Approximate Bayesian Computation, SMARTPOP has been coded in C++ and is heavily optimized for speed and reduced memory usage.ConclusionSMARTPOP rapidly simulates population genetic data under a wide range of demographic scenarios and social behaviors, thus allowing quantitative analyses to address complex socio-ecological questions.