7 results on '"Ming-Gang Zhao"'
Search Results
2. Regioselective N-Addition/Substitution Reaction of α-Alkylidene Pyrazolinones with Propargyl Sulfonium Salts to Construct Allylthio-Containing Pyrazolones
- Author
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Xiao-Li Du, Jin-Yan Liang, Ming-gang Zhao, Xiao-Li Xu, and Shou-Jie Shen
- Subjects
Substitution reaction ,chemistry.chemical_compound ,chemistry ,010405 organic chemistry ,Sulfonium ,Organic Chemistry ,Propargyl ,Pyrazolones ,Regioselectivity ,010402 general chemistry ,01 natural sciences ,Combinatorial chemistry ,0104 chemical sciences - Abstract
The regioselective N-addition/substitution reaction between α-alkylidene pyrazolinones and propargyl sulfonium salts has been developed to construct functionalized allylthio-containing pyrazolones with moderate to excellent yields. α-Alkylidene pyrazolinones act as N-nucleophilic agents which are distinguished from reported C-nucleophilic reactions. Excellent regioselectivity, readily available starting materials, the broad range of substrates, gram-scale synthesis, and simple operation illustrate the synthetic advantages of this new reaction pathway.
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- 2019
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3. Combined inorganic base promoted N-addition/[2,3]-sigmatropic rearrangement to construct homoallyl sulfur-containing pyrazolones
- Author
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Xiao-Li Du, Jin-Yan Liang, Xiao-Li Xu, Ming-gang Zhao, Yue-Hua Wu, and Shou-Jie Shen
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chemistry.chemical_classification ,Annulation ,Base (chemistry) ,Sulfonium ,General Chemical Engineering ,2,3-sigmatropic rearrangement ,Regioselectivity ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Medicinal chemistry ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Propargyl ,Pyrazolones ,Rearrangement reaction ,0210 nano-technology - Abstract
The first sequentially combined inorganic base promoted N-addition/[2,3]-sigmatropic rearrangement reaction of α-alkylidene pyrazolinones and propargyl sulfonium salts has been reported to construct homoallyl sulfur-containing pyrazolones with moderate to excellent yields. α-Alkylidene pyrazolinones function as N-nucleophilic agents distinguished from the reported C-addition reactions. Propargyl sulfonium salts were first involved in the [2,3]-sigmatropic rearrangement protocol differentiated from the well-established annulation reactions. The excellent regioselectivity, the broad scope of substrates, gram-scale synthesis and convenient transformation embody the synthetic superiority of this cascade process.
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- 2019
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4. First experimental constraints on WIMP couplings in the effective field theory framework from CDEX
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X. C. Ruan, Y. C. Mao, Z. She, Ming-Gang Zhao, S. M. He, Qian Yue, Qing Wang, Shiyong Wu, Tao Xue, Hong-Jian He, QiuJu Guo, J. W. Hu, Yin Xu, H. Pan, Tianxi Sun, Z. Y. Zhou, Manoj Kumar Singh, Chang-Jian Tang, Li Wang, B. Liao, ZhongZhi Liu, Q. Y. Nie, Yulan Li, Hanxiong Huang, W. Y. Tang, Zhi Deng, Lei Zhang, Lakhwinder Singh, Hao Yu, Hao Ma, Xia Li, Wei Dai, Hao-Yang Xing, Yucheng Wu, C. S. Shang, Jin Li, Liu Yuanyuan, Jingjun Zhu, Hai-Peng An, Hau-Bin Li, M. Agartioglu, B. T. Zhang, L. He, YuChen Wang, J. H. Ning, Feng-Shou Zhang, T. C. Huang, Yuanjing Li, Xi Jiang, Jing Zhou, R. M. J. Li, X. Y. Guo, Jianmin Li, Ming Zeng, S. K. Liu, Yipeng Wang, Yi Wang, Henry T. Wong, Zhen Wang, Y. L. Yan, H. T. Jia, Zhi Zeng, Yu Liu, C. H. Fang, KangKang Zhao, N. Yi, Vivek Sharma, Yunhua Chen, Y. Y. Liu, Kejun Kang, L. T. Yang, Chunxu Yu, J. P. Chang, Jie Ren, Hui Gong, Jianping Cheng, X. P. Geng, Yang Tian, L. P. Jia, C. Y. Chiang, Jianbo Yue, F. K. Lin, MingXuan Li, Shin-Ted Lin, ZhenYu Zhang, Jing-Han Chen, N. C. Qi, and G. F. Wang
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Coupling ,Physics ,Particle physics ,Physics - Instrumentation and Detectors ,General Physics and Astronomy ,FOS: Physical sciences ,Instrumentation and Detectors (physics.ins-det) ,01 natural sciences ,High Energy Physics - Experiment ,Set (abstract data type) ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,WIMP ,China Dark Matter Experiment ,Weakly interacting massive particles ,0103 physical sciences ,Modulation (music) ,Effective field theory ,Limit (mathematics) ,010306 general physics ,010303 astronomy & astrophysics - Abstract
We present weakly interacting massive particles (WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment (CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level (C.L.) and improve over the current bounds in the low $m_{\chi}$ region. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the $m_{\chi}, Comment: version accepted by Science China-PMA, 8 pages, 8 figures
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- 2020
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5. Improved measurements of the absolute branching fractions of the inclusive decays D+(0)→ϕX
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Stefano Spataro, Antonio Amoroso, Hailong Ma, Ilaria BALOSSINO, Meike Kuessner, Alessio Mangoni, Hongbang Liu, Hajime Muramatsu, Xin Shi, Michela Greco, Alexey Zhemchugov, Qiang Zhao, Riccardo Farinelli, Xiaonan Li, Anatoliy Guskov, Jiahui Wei, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Onur Bugra Kolcu, Alfons Khoukaz, Vindhyawasini Prasad, Banzragch Tsednee, Patrik Adlarson, Johan Messchendorp, Ralf Kliemt, Peirong Li, Ming-Gang Zhao, Xiang Liu, Giulio Mezzadri, Fabio Cossio, and Karin Schoenning
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Nuclear physics ,Physics ,Annihilation ,010308 nuclear & particles physics ,0103 physical sciences ,Detector ,High Energy Physics::Experiment ,010306 general physics ,Branching (polymer chemistry) ,01 natural sciences - Abstract
By analyzing 2.93 fb(-1) of e(+)e(-) annihilation data taken at the center-of-mass energy root s = 3.773 GeV with the BESIII detector, we determine the branching fractions of the inclusive decays D ...
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- 2019
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6. Limits on light WIMPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground Laboratory
- Author
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X. H. Zeng, Lakhwinder Singh, Hao Jiang, Hao-Yang Xing, Li Wang, Jing-Han Chen, Ming-Gang Zhao, Kejun Kang, Qiang Du, J. F. Yue, Shiyong Wu, Jianping Cheng, B. Sevda, Chang-Jian Tang, L. He, J. P. Chang, Tao Xue, Zhi Zeng, Hong Li, Qing Wang, Yucheng Wu, Yulan Li, Xichao Ruan, M. Aǧartioǧlu, Vivek Sharma, Hao Ma, Qian Yue, ZhongZhi Liu, J. F. Zhou, Hai-Peng An, N. Yi, Q. D. Hu, Ji-Min Wang, Henry T. Wong, L. T. Yang, W. Y. Tang, Jin Li, Yunhua Chen, Chunxu Yu, F. K. Lin, S. K. Liu, Ming Zeng, Song-Wei Yang, J. L. Ma, H. Pan, Jingjun Zhu, Hanxiong Huang, Zhi Deng, Xia Li, Yun-Hua Zhang, Shin-Ted Lin, Yuanjing Li, Wei Zhao, Man-Bin Shen, Zhong-Hua Zhu, Yang Tian, L. P. Jia, Yi Wang, J. W. Hu, Z. Y. Zhou, H. J. Yu, Xue-Qian Li, Jianmin Li, Yin Xu, Manoj Kumar Singh, Hau-Bin Li, Jie Ren, and Hui Gong
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Physics ,Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,Dark matter ,Astrophysics::Instrumentation and Methods for Astrophysics ,Massive particle ,China Jinping Underground Laboratory ,FOS: Physical sciences ,Astronomy and Astrophysics ,Scale (descriptive set theory) ,Instrumentation and Detectors (physics.ins-det) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,High Energy Physics - Experiment ,Semiconductor detector ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,WIMP ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Instrumentation - Abstract
We report results of a search for light weakly interacting massive particle (WIMP) dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory (CJPL). Constraints on WIMP-nucleon spin-independent (SI) and spin-dependent (SD) couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light WIMPs to 2 GeV and improve over our earlier bounds at WIMP mass less than 6 GeV., Comment: 10 pages, 10 figures
- Published
- 2018
- Full Text
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7. Looking for new physics via semi-leptonic and leptonic rare decays of D and D s
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X. Q. Hao, Xing-Dao Guo, Ming-Gang Zhao, Xue-Qian Li, and Hong-Wei Ke
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Physics ,Nuclear and High Energy Physics ,Particle physics ,High energy ,Large Hadron Collider ,010308 nuclear & particles physics ,Branching fraction ,Physics beyond the Standard Model ,High Energy Physics::Phenomenology ,Unparticle physics ,FOS: Physical sciences ,Astronomy and Astrophysics ,01 natural sciences ,Lower energy ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Instrumentation - Abstract
It is well recognized that looking for new physics at lower energy colliders is a tendency which is complementary to high energy machines such as LHC. Based on large database of BESIII, we may have a unique opportunity to do a good job. In this paper we calculate the branching ratios of semi-leptonic processes $D^+_s \to K^+ e^-e^+$, $D^+_s \to K^+ e^-\mu^+$ and leptonic processes $D^0 \to e^-e^+$, $D^0 \to e^-\mu^+$ in the frames of $U(1)'$ model, 2HDM and unparticle separately. It is found that both the $U(1)'$ and 2HDM may influence the semi-leptonic decay rates, but only the $U(1)'$ offers substantial contributions to the pure leptonic decays and the resultant branching ratio of $D^0 \to e^-\mu^+$ can be as large as $10^{-7}\sim10^{-8}$ which might be observed at the future super $\tau$-charm factory., Comment: 20 pages, 6 figures
- Published
- 2017
- Full Text
- View/download PDF
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