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825 results on '"Cao, Fu"'

4. Direct measurement of the break-out 19F(p, γ)20Ne reaction in the China Jinping underground laboratory (CJPL)

Author

Chen, Yin-Ji, Zhang, Hao, Zhang, Li-Yong, He, Jian-Jun, deBoer, Richard James, Wiescher, Michael, Heger, Alexander, Kahl, David, Su, Jun, Odell, Daniel, Li, Xin-Yue, Wang, Jian-Guo, Zhang, Long, Cao, Fu-Qiang, Zhang, Zhi-Cheng, Jiang, Xin-Zhi, Wang, Luo-Huan, Li, Zi-Ming, Song, Lu-Yang, Sun, Liang-Ting, Wu, Qi, Li, Jia-Qing, Cui, Bao-Qun, Chen, Li-Hua, Ma, Rui-Gang, Li, Er-Tao, Lian, Gang, Sheng, Yao-De, Li, Zhi-Hong, Guo, Bing, and Liu, Wei-Ping

Published
2024
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13. Radial excitation of light mesons and the $\gamma \gamma^* \rightarrow \pi^0$ transition form factor

Author

Cao, Fu-Guang

Subjects
High Energy Physics - Phenomenology
Abstract

We investigate radial excitation of the quark-antiquark pair in the $\pi^0$ meson and its effects on the $\gamma \gamma^* \rightarrow \pi^0$ transition form factor in the framework of light-cone perturbative QCD. The existing constraints on the light-cone wave function of the lowest Fock state $|q { \bar q} \rangle$ in the $\pi^0$ meson allow a sizeable radial excitation of the quark-antiquark pair. We construct the light-cone wave function for the quark-antiquark pair in the first radially excited state (the 2S state) using a simple harmonic oscillator potential. The distribution amplitude obtained for the 2S state has two nodes in $x$ at low scale of $Q$ and thereby has a much strong scale dependence than the 1S state. Contributions from this radial excitation to the $\gamma \gamma^* \rightarrow \pi^0$ transition form factor exhibit different $Q^2$-dependence behavior from the ground state and thus can modify the prediction for the transition form factor in the medium-large region of $Q^2$., Comment: 10 pages, 4 figures; to appear in Phys. Rev. D

Published
2021
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29. Node Local Similarity Based Two-stage Density Peaks Algorithm for Overlapping Community Detection

Author

DUAN Xiao-hu, CAO Fu-yuan

Subjects
overlapping community detection, density peaks, node similarity, k-nearest neighbors, degree of membership, Computer software, QA76.75-76.765, Technology (General), T1-995
Abstract

In order to detect overlapping community structures in complex networks,the idea of density peaks clustering algorithm is introduced.However,applying the density peaks clustering algorithm to community detection still has problems such as how to measure the distance between nodes and how to generate overlapping partition results.Therefore,a node local similarity based two-stage density peaks algorithm for overlapping community detection is proposed (LSDPC).By combining hub promoted index and connection contribution degree,a new node local similarity index is defined,and the node distance is measured with the node local similarity.Then the local density and minimum distance of nodes are used to calculate their center values and Chebyshev inequality is used to select communities’ center nodes.The overlapping communities are obtained through initial assignment and overlapping assignment.Experimental results on real network datasets and synthetic network datasets show that the proposed algorithm can effectively detect overlapping community structure,and the results are better than that of other algorithms.

Published
2022
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30. Meaningful Details: The value of adding baseline dependence to the Neutrino-Dark Matter Effect

Author

Marks, William S. and Cao, Fu-Guang

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

The possible effect on the flavour spectra of astronomical neutrinos from a neutrino-dark matter interaction has been investigated for decoherent neutrinos. In this work, we report results calculated for coherent neutrinos. This was done with two different models for the neutrino dark-matter interactions: a flavour state interaction,as for the weak interaction in the Standard Model, and a mass state interaction, which is predicted by certain non-Standard Models (specifically Scotogenic models). It was found that using a coherent analysis dramatically increased the explorable parameter space for the neutrino-dark matter interaction. However, the detection of coherent astronomical neutrinos presents a significant challenge to experimentalists, because such a detection would require an improvement in energy resolution by at least six orders of magnitude, with similar improvements in astronomical distance determinations., Comment: 18 pages, 12 figures

Published
2018
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31. Extraction of neutrino mixing parameters from experiments with multiple identical detectors

Author

Cao, Fu-Guang and Marks, William S.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

The statistical method used in the analyses of measurements of neutrino oscillation mixing angle $\theta_{13}$ by the Daya Bay Collaboration is based on variational minimization of a $\chi^2$ function defined in terms of quantities of interest and pull factors which are introduced to deal with effects of systematic uncertainties. For both experiments, the number of parameters that need to be determined is great than the number of available data points (20 vs 6 for the Daya Bay and 12 vs 2 for the RENO). While the results for the mixing angle and the normalization factor were reported, results for the other parameters (pull factors) were omitted in their publications. There exist multiple sets of parameters from the minimization of the $\chi^2$ function. We investigate the sensitivity of the extracted mixing angle on this non-uniqueness of minimization results for the Daya Bay data using two methods of minimization. We report results for all parameters, including those of physics interest and pull factors. The obtained results for the mixing angle and the normalization factor are in agreement with those reported by the Daya Bay Collaboration. Furthermore, we present plots of confidence level contours in the space of the mixing angle and normalization factor. We also present results from fittings using a reduced $\chi^2$ function with fewer parameters than the one employed by the Daya Bay Collaboration., Comment: 14 pages, 2 figures

Published
2018
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