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Chinese Control Conference

作者： Wang Luo Haobin Dong Jian Ge Huan Liu Bingjie Bar Cheng Zhang Zhiwen Yuan Jun Zhu Haiyang Zhang Hubei Key Laboratory of Advance Control and Intelligent Automation for Complex Systems Wuhan Hubei China Science and Technology on Near-Surface Detection Laboratory Wuxi Jiangsu China

This paper presents an all-solid porous Ag/AgCl electric field sensor with ultralow-potential drift for detecting the seafloor electric field signals. The superiority of porous electrode compared with flat electrode on the polarization stability is expounded, and the technological process using solid state agglomeration in developing the all-solid porous Ag/AgCl electrode core are described. Moreover, a new sensor shell is proposed. Numerous parameters, e.g., polarization resistance, self-potential, drift, etc., of the proposed electrode are tested. The experimental results show that the self-potential is less than ±0.1 mV, the source resistance is less than 0.01H, and the drift potential is less than ±5μV/24h, which indicate the superior performance of the proposed Ag/AgCl electric field sensor for marine electric field exploration.

关键词： Electrodes Electric potential Resistance Electric fields Solids Thermal stability Sea measurements

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Evidence of the singly Cabibbo suppressed decay Λc+→pπ0

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Physical Review D 2024年第9期109卷 L091101-L091101页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso M. R. An Q. An Y. Bai O. Bakina I. Balossino Y. Ban V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang T. T. Chang W. L. Chang G. R. Che G. Chelkov C. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen W. S. Cheng S. K. Choi X. Chu G. Cibinetto S. C. Coen F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Y. Fan Y. L. Fan J. Fang S. S. Fang W. X. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng K. Fischer M. Fritsch C. Fritzsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain N. Hüsken W. Imoehl J. Jackson S. Jaeger S. Janchiv J. H. Jeong Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia H. J. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing T. Johansson X. K. S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke A. Khoukaz R. Kiuchi R. Kliemt O. B. Kolcu B. Kopf M. Kuessner A. Kupsc W. Kühn J. J. Lane P. Larin A. Lavania L. Lavezzi T. T. Lei Z. H. Lei H. Leithoff M. Lellmann T. Lenz C. Li C. H. Li Cheng Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Xinyang Normal University Xinyang 464000 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Jilin University Changchun 130012 People’s Republic of China Hunan Univers

Evidence for the singly Cabibbo suppressed decay Λc+→pπ0 is reported for the first time with a statistical significance of 3.7σ based on 6.0 fb−1 of e+e− collision data collected at center-of-mass energies between 4.600 and 4.843 GeV with the BESIII detector at the BEPCII collider. The absolute branching fraction of Λc+→pπ0 is measured to be (1.56−0.58+0.72±0.20)×10−4. Combining with the branching fraction of Λc+→nπ+, (6.6±1.3)×10−4, the ratio of the branching fractions of Λc+→nπ+ and Λc+→pπ0 is calculated to be 3.2−1.2+2.2. As an important input for the theoretical models describing the decay mechanisms of charmed baryons, our result indicates that the nonfactorizable contributions play an essential role and their interference with the factorizable contributions should not be significant. In addition, the absolute branching fraction of Λc+→pη is measured to be (1.63±0.31stat±0.11syst)×10−3.

关键词： Branching fraction Hadronic decays Charmed baryons Hadrons

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Search for the light hadron decay χc1(3872)→π+π−η

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Physical Review D 2024年第1期109卷 L011102-L011102页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso M. R. An Q. An Y. Bai O. Bakina I. Balossino Y. Ban V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang T. T. Chang W. L. Chang G. R. Che G. Chelkov C. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen W. S. Cheng S. K. Choi X. Chu G. Cibinetto S. C. Coen F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. L. Fan J. Fang S. S. Fang W. X. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng K. Fischer M. Fritsch C. Fritzsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain N. Hüsken W. Imoehl J. Jackson S. Jaeger S. Janchiv J. H. Jeong Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia H. J. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing T. Johansson X. K. S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang R. Kappert M. Kavatsyuk B. C. Ke A. Khoukaz R. Kiuchi R. Kliemt O. B. Kolcu B. Kopf M. Kuessner A. Kupsc W. Kühn J. J. Lane P. Larin A. Lavania L. Lavezzi T. T. Lei Z. H. Lei H. Leithoff M. Lellmann T. Lenz C. Li C. H. L Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Xinyang Normal University Xinyang 464000 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Jilin Univer

With a data sample corresponding to an integrated luminosity of 11.5 fb−1 collected with the BESIII detector operating at the BEPCII storage ring, for the first time the light hadron decay χc1(3872)→π+π−η is searched for. While no significant signal is observed, the upper limits at the 90% confidence level for σ[e+e−→γχc1(3872)]B[χc1(3872)→π+π−η] at center of mass energies from 4.13 GeV to 4.34 GeV are determined. By normalizing to the χc1(3872)→π+π−J/ψ decay channel, a 90% confidence level upper limit for the branching fraction ratio R=B[χc1(3872)→π+π−η]/B[χc1(3872)→π+π−J/ψ]<0.12 is given. These measurements provide important inputs for understanding the internal structure of the χc1(3872) resonance.

关键词： Branching fraction Hadronic decays Exotic mesons

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Optimization of Overhauser magnetometer based on multi-channel frequency measurement algorithm

Optimization of Overhauser magnetometer based on multi-chann...

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Chinese Control Conference (CCC)

作者： Guanzhong Wang Haobin Dong Jian Ge Vang Luo Huan Liu Zhiwen Yuan Jun Zhu Haiyang Zhang Hubei Key Laboratory of Advance Control and Intelligent Automation for Complex Systems Wuhan Hubei China Science and Technology on Near-Surface Detection Laboratory Wuxi Jiangsu China

Overhauser magnetometer is a weak magnetic measuring instrument based on the dynamic nuclear polarization of free radical species. It has the characteristics of high precision, high sensitivity, low power consumption and continuous measurement. It is widely used in geophysics, aeromagnetic surveying, satellite Magnetic measuring, military and various engineering fields. Aiming at the problem that the measurement accuracy of the magnetometer prototype is low and the measurement effect is poor when the angle between the probe axis and the geomagnetic field is 0°, several optimization methods are proposed and the magnetometer is optimized by adding the frequency measurement channel on the basis of the prototype. Based on the standard deviation of GSM-19 measurement data, comparing the experimental data that use the multi -channel frequency measurement algorithm, the standard deviation of prototype data decreases from 0.397 to 0.203 when the angle between probe axial and geomagnetic field is 45°, the standard deviation of the prototype data decreases from 0.631 to 0.371 when the angle between probe axial and geomagnetic field is 0°, which provides an important reference for the follow-up optimization of the magnetometer.

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Partial wave analysis of + c.c.

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Journal of High Energy Physics 2025年第2期2025卷 1-24页

作者： Ablikim, M. Achasov, M. N. Adlarson, P. Afedulidis, O. Ai, X. C. Aliberti, R. Amoroso, A. An, Q. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R. A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G. F. Cao, N. Cetin, S. A. Chai, X. Y. Chang, J. F. Che, G. R. Chelkov, G. Chen, C. Chen, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. L. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Y. Q. Chen, Z. J. Chen, Z. Y. Choi, S. K. Cibinetto, G. Cossio, F. Cui, J. J. Dai, H. L. Dai, J. P. Dbeyssi, A. de Boer, R. E. Dedovich, D. Deng, C. Q. Deng, Z. Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X. X. Ding, Y. Dong, J. Dong, L. Y. Dong, M. Y. Dong, X. Du, M. C. Du, S. X. Duan, Y. Y. Duan, Z. H. Egorov, P. Fan, Y. H. Fang, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, Y. Q. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C. Q. Feng, J. H. Feng, Y. T. Fritsch, M. Fu, C. D. Fu, J. L. Fu, Y. W. Gao, H. Gao, X. B. Gao, Y. N. Gao, Yang Garbolino, S. Garzia, I. Ge, L. Ge, P. T. Ge, Z. W. Geng, C. Gersabeck, E. M. Gilman, A. Goetzen, K. Gong, L. Gong, W. X. Gradl, W. Gramigna, S. Greco, M. Gu, M. H. Gu, Y. T. Guan, C. Y. Guo, A. Q. Guo, L. B. Guo, M. J. Guo, R. P. Guo, Y. P. Guskov, A. Gutierrez, J. Han, K. L. Han, T. T. Hanisch, F. Hao, X. Q. Harris, F. A. He, K. K. He, K. L. Heinsius, F. H. Heinz, C. H. Heng, Y. K. Herold, C. Holtmann, T. Hong, P. C. Hou, G. Y. Hou, X. T. Hou, Y. R. Hou, Z. L. Hu, B. Y. Hu, H. M. Hu, J. F. Hu, S. L. Hu, T. Hu, Y. Huang, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, Y. S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Jeong, J. H. Ji, Q. Ji, Q. P. Ji, W. Ji, X. B. Ji, X. L. Ji, Y. Y. Jia, X. Q. Jia, Z. K. Jiang, D. Jiang, H. B. Jiang, P. C. Jiang, S. S. Jiang, T. J. Jiang, X. S. Jiang, Y. Jiao, J. B. Jiao, J. K. Jiao, Z. Jin, S. Jin, Y Institute of High Energy Physics Beijing People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk Russia Novosibirsk State University Novosibirsk Russia Uppsala University Uppsala Sweden Bochum Ruhr-University Bochum Germany Zhengzhou University Zhengzhou People’s Republic of China Johannes Gutenberg University of Mainz Mainz Germany University of Turin Turin Italy INFN Turin Italy University of Science and Technology of China Hefei People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing People’s Republic of China Southeast University Nanjing People’s Republic of China Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Ferrara Ferrara Italy Peking University Beijing People’s Republic of China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing People’s Republic of China University of Chinese Academy of Sciences Beijing People’s Republic of China National Centre for Nuclear Research Warsaw Poland Institute of Physics and Technology Ulaanbaatar Mongolia INFN Laboratori Nazionali di Frascati Frascati Italy Carnegie Mellon University Pittsburgh USA University of Muenster Muenster Germany Wuhan University Wuhan People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University Istanbul Turkey Nankai University Tianjin People’s Republic of China Moscow Institute of Physics and Technology Moscow Russia China University of Geosciences Wuhan People’s Republic of China Soochow University Suzhou People’s Republic of China Henan University Kaifeng People’s Republic of China Nanjing University Nanjing People’s Republic of China North China Electric Power University Beijing People’s Republic of China Tsinghua University Beijing People’s Republic of China Institute of Modern Physics Lanzhou People’s Republic of China Jilin University Changchun People’s Republic of China Hunan University Changsha People’s Republic of

Based on a sample of (2712.4 ± 14.3) × 106 ψ(3686) events collected with the BESIII detector, a partial wave analysis of the decay $$ \psi (3686)\to \Lambda {\overline{\Sigma}}^0{\pi}^0 $$ + c.c. is performed to investigate Λ* and Σ* resonances in the $$ {\pi}^0{\overline{\Sigma}}^0 $$ and π0Λ invariant mass distributions. Significant contributions are found from the Λ(1405), Λ(1520), Λ(1600), Λ(1670), Λ(1690), Λ(1800), Λ(1890), Λ(2325), Σ(1385), Σ(1660), Σ(1670), Σ(1750), and Σ(1910). The masses, widths, and production branching fractions for each component are determined. In addition, the branching fraction of $$ \psi (3686)\to \Lambda {\overline{\Sigma}}^0{\pi}^0 $$ + c.c. is measured to be (1.544 ± 0.013 ± 0.071) × 10−4 for the first time, where the first uncertainty is statistical and the second systematic.

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Observation of the singly Cabibbo-suppressed decay Λc+→Σ−K+π+

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Physical Review D 2024年第7期109卷 L071103-L071103页

The singly Cabibbo-suppressed decay Λc+→Σ−K+π+ is observed for the first time with a statistical significance of 5.4σ by using 4.5 fb−1 of e+e− collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. The absolute branching fraction of Λc+→Σ−K+π+ is measured to be (3.8±1.2stat±0.2syst)×10−4 in a model-independent approach. This is the first observation of a Cabibbo-suppressed Λc+ decay involving Σ− in the final state. The ratio of branching fractions between Λc+→Σ−K+π+ and the Cabibbo-favored decay Λc+→Σ−π+π+ is observed to be (0.4±0.1)sc2, where sc≡sinθc=0.2248 with θc the Cabibbo mixing angle.

关键词： Hadronic decays Charmed baryons

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Observation of ψ(3770)→ηJ/ψ

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Physical Review D 2023年第9期107卷 L091101-L091101页

作者： M. Ablikim M. N. Achasov P. Adlarson S. Ahmed M. Albrecht R. Aliberti A. Amoroso M. R. An Q. An X. H. Bai Y. Bai O. Bakina R. Baldini Ferroli I. Balossino Y. Ban V. Batozskaya D. Becker K. Begzsuren N. Berger M. Bertani D. Bettoni F. Bianchi J. Bloms A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. Chelkov C. Chen G. Chen H. S. Chen M. L. Chen S. J. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Z. J. Chen W. S. Cheng G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong S. X. Du P. Egorov Y. L. Fan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng K. Fischer M. Fritsch C. D. Fu H. Gao Y. N. Gao Yang Gao I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl M. Greco L. M. Gu M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo R. P. Guo Y. P. Guo A. Guskov T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold M. Himmelreich T. Holtmann G. Y. Hou Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang Z. Huang T. Hussain N. Hüsken W. Imoehl M. Irshad J. Jackson S. Jaeger S. Janchiv Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji H. B. Jiang S. S. Jiang X. S. Jiang Y. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing T. Johansson N. Kalantar-Nayestanaki X. S. Kang R. Kappert M. Kavatsyuk B. C. Ke I. K. Keshk A. Khoukaz P. Kiese R. Kiuchi R. Kliemt L. Koch O. B. Kolcu B. Kopf M. Kuemmel M. Kuessner A. Kupsc W. Kühn J. J. Lane J. S. Lange P. Larin A. Lavania L. Lavezzi Z. H. Lei H. Leithoff M. Lellmann T. Lenz C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. Li H. B. Li H. J. Li H. N. Li J. Q. Li J. S. Li J. W. Li Ke Li L. J. Li L. K. Li Lei Li M. H. Li P. R. Li S. X. Li S. Y. Li T. Li W. D. Li W. G. Li X. H. Li X. Institute of High Energy Physics Beijing 100049 People’s Republic of China G.I. Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Helmholtz Institute Mainz Staudinger Weg 18 D-55099 Mainz Germany Bochum Ruhr-University D-44780 Bochum Germany Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China University of Jinan Jinan 250022 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Wuhan University Wuhan 430072 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Hunan University Changsha 410082 People’s Republic of China Shandong University Jinan 250100 People’s Republic of China Yunnan University Kunming 6505

Using a data sample collected with the BESIII detector operating at the BEPCII storage ring, the Born cross section of the process e+e−→ηJ/ψ at a center-of-mass energy s=3.773 GeV is measured to be (8.88±0.87±0.42) pb. We fit the cross section line shape before correcting for the initial state radiation from s=3.773 to 4.600 GeV to obtain the branching fraction B(ψ(3770)→ηJ/ψ). We obtain B(ψ(3770)→ηJ/ψ)=(11.3±5.9±1.1)×10−4 when the ψ(3770) decay amplitude is added coherently to the other contributions, and (8.7±1.0±0.8)×10−4 when it is added incoherently. Here the quoted uncertainties are statistical and systematic, respectively. In both cases, the statistical significance of ψ(3770) resonance is above 7σ. This is the first time the decay ψ(3770)→ηJ/ψ is observed with a statistical significance greater than 5σ.

关键词： Particle interactions Particle production Quarkonia Lepton colliders

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Search for diphoton decays of an axionlike particle in radiative J/ψ decays

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Physical Review D 2024年第3期110卷 L031101-L031101页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso M. R. An Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. R. Che G. Chelkov C. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen S. K. Choi X. Chu G. Cibinetto S. C. Coen F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng K. Fischer M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain N. Hüsken N. in der Wiesche M. Irshad J. Jackson S. Jaeger S. Janchiv J. H. Jeong Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner A. Kupsc W. Kühn J. J. Lane P. Larin L. Lavezzi T. T. Lei Z. H. Lei Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China North China Electric Power University Beijing 102206 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Jilin University Changchun 130012 People’s Republic of China Hunan University Changsha 410082 P

We search for the diphoton decay of a light pseudoscalar axionlike particle, a, in radiative J/ψ decays, using 1010 J/ψ events collected with the BESIII detector. We find no evidence of a signal and set upper limits at the 95% confidence level on the product branching fraction B(J/ψ→γa)×B(a→γγ) and the axionlike particle photon coupling constant gaγγ in the ranges of (3.7–48.5)×10−8 and (2.2–101.8)×10−4 GeV−1, respectively, for 0.18≤ma≤2.85 GeV/c2. These are the most stringent limits to date in this mass region.

关键词： Axions Electroweak symmetry breaking Extensions of Higgs sector

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Search for the decay χc1(3872)→π+π−χc1

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Physical Review D 2024年第7期109卷 L071101-L071101页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso M. R. An Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang T. T. Chang W. L. Chang G. R. Che G. Chelkov C. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen S. K. Choi X. Chu G. Cibinetto S. C. Coen F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng K. Fischer M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez T. T. Han W. Y. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain N. Hüsken N. in der Wiesche M. Irshad J. Jackson S. Jaeger S. Janchiv J. H. Jeong Q. Ji Q. P. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia H. J. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson X. K. S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi R. Kliemt O. B. Kolcu B. Kopf M. Kuessner A. Kupsc W. Kühn J. J. Lane P. Larin A. Lavania L. Lavezzi T. Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy Liaoning Normal University Dalian 116029 People’s Republic of China University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Xinyang Normal University Xinyang 464000 People’s Republic of China Nankai University Tianjin 300071 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China North China Electric Power University Beijing 102206 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of

Using a data sample corresponding to an integrated luminosity of 10.9 fb−1 collected at center-of-mass energies from 4.16 to 4.34 GeV with the BESIII detector, we search for the decay χc1(3872)→π+π−χc1 in the radiative production e+e−→γχc1(3872). No significant signal is observed, and the ratio for the branching fraction of χc1(3872)→π+π−χc1 to χc1(3872)→π+π−J/ψ is measured as R≡B[χc1(3872)→π+π−χc1]B[χc1(3872)→π+π−J/ψ]<0.18 at 90% confidence level. An upper limit on the product of the cross section σ[e+e−→γχc1(3872)] and the branching fraction B[χc1(3872)→π+π−χc1] at each center-of-mass energy is also given. These measurements favor the nonconventional charmonium nature of the χc1(3872) state.

关键词： Branching fraction Exotic mesons

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Measurements of Born cross sections for e+e−→Λc+Λ¯c(2595)−+c.c. and e+e−→Λc+Λ¯c(2625)−+c.c. at s=4918.0 and 4950.9 MeV

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Physical Review D 2024年第7期109卷 L071104-L071104页

作者： M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. R. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi X. Chu G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng K. Fischer M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche M. Irshad J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner X. Kui A. Kupsc W. Kühn J. Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Uppsala University Box 516 SE-75120 Uppsala Sweden Bochum Ruhr-University D-44780 Bochum Germany Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Istitute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China China University of Geosciences Wuhan 430074 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Nanjing University Nanjing 210093 People’s Republic of China North China Electric Power University Beijing 102206 People’s Republic of China Tsinghua University Beijing 100084 People’s Republic of China Institute of Modern Physics Lanzhou 730000 People’s Republic of China Jilin Univers

Using e+e− collision data collected with the BESIII detector operating at the BEPCII collider, the Born cross sections of e+e−→Λc+Λ¯c(2595)−+c.c. and e+e−→Λc+Λ¯c(2625)−+c.c. are measured for the first time at center-of-mass energies of s=4918.0 and 4950.9 MeV. Nonzero cross sections are observed very close to the production threshold. The measured Born cross sections of e+e−→Λc+Λ¯c(2625)−+c.c. are about 2–3 times greater than those of e+e−→Λc+Λ¯c(2595)−+c.c., providing the similar behavior as semileptonic decays of Λb0, but different behavior from that in the hadronic decays of Λb0. The Born cross sections are 15.6±3.1±0.9 pb and 29.4±3.7±2.7 pb for e+e−→Λc+Λ¯c(2595)−+c.c., and are 43.4±4.0±4.1 pb and 76.8±6.5±4.2 pb for e+e−→Λc+Λ¯c(2625)−+c.c. at s=4918.0 and 4950.9 MeV, respectively. Based on the polar angle distributions of the Λ¯c(2625)− and Λc(2625)+, the form-factor ratios |GE|2+3|GM|2/|GC| are determined for e+e−→Λc+Λ¯c(2625)−+c.c. for the first time, which are 5.95±4.07±0.15 and 0.94±0.32±0.02 at s=4918.0 and 4950.9 MeV, respectively. All of these first uncertainties are statistical and second systematic.

关键词： Strong interaction Baryons Charm quark Charmed baryons Exotic baryons Form factors

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