摘要：
Semi-supervised classification has gained widespread popularity because of their superior ability to handle unlabeled samples in practical problems. This paper has presented a novel estimation error-ranked LSSVM method with double Mahalanobis-kernel which is used for semi-supervised classification. The main point is to construct two Mahalanobis distances in Hilbert space to form double Mahalanobis-kernel by considering the relationship between the characteristics of two sorts of samples, so as to reduce the influence of non-informational dimensions. Furthermore, the implementation of the proposed method is required to solve the label security problem of unlabeled samples. The unlabeled sample with the minimum evaluated error is selected for labeling, which effectively ensures the accuracy of the unlabeled sample labeling. This method not only considers the similarity of sample features, but also focuses on the security of unlabeled samples. And based on the experimental results of four artificial data sets and several UCI data sets, it verifies the effectiveness of the semi-supervised method with double Mahalanobis-kernel. Especially considering the experimental results of five disease diagnosis data sets, it demonstrates the potential of the proposed semi-supervised classification method in medical diagnosis.
摘要：
In this study, the possibility of observing a solar neutrino background in a future neutrinoless double beta decay experiment using a high-pressure gaseous (SeF6)-Se-82 TPC is investigated. Various contributions are simulated, and possible features that could be used for event classification are discussed; two types of backgrounds are identified. The rate of multi-site background events is approximately 0.63 events/(ton<middle dot>yr) in a 30 keV ROI window. This background could be effectively reduced to less than 0.0001 events/(ton<middle dot>yr) (95% C.L.) while maintaining a high signal efficiency of 93% by applying a selection based on the number of clusters and energy of the leading cluster. The rate of the single-electron background events is approximately 0.01 events/(ton<middle dot>yr) in the ROI. Assuming a reduction factor of 10 for the single-electron background events obtained via the algorithms developed for radioactive background rejection, the total background induced by the solar neutrino would be 0.001 events/(ton<middle dot>yr), which is sufficiently small for conducting ton-level experiments.
作者机构：
Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China;School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China;China Center of Advanced Science and Technology, Chinese Academy of Sciences, Beijing 100080, China;[Lin Qiu] Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China<&wdkj&>School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
摘要：
Motivated by the first observation of the double-charm tetraquark Tcc+(3875) by the LHCb Collaboration, we investigate the nature of Tcc+ as an isoscalar DD* hadronic molecule in a meson-exchange potential model incorporated by the coupled-channel effects and three-body unitarity. The D0D0π+ invariant mass spectrum can be well-described and the Tcc+ pole structure can be precisely extracted. Under the hypothesis that the interactions between the heavy flavor hadrons can be saturated by the light meson-exchange potentials, the near-threshold dynamics of Tcc+ can shed light on the binding of its heavy-quark spin symmetry (HQSS) partner D*D* ( I=0 ) and on the nature of other heavy hadronic molecule candidates such as X(3872) and Zc(3900) in the charmed-anticharmed systems. The latter states can be related to Tcc+ in the meson-exchange potential model with limited assumptions based on the SU(3) flavor symmetry relations. The combined analysis, on the one hand, indicates the HQSS breaking effects among those HQSS partners, and on the other hand, highlights the role played by the short and long-distance dynamics for the near threshold D(*)D(*) and D(*)D¯(*)+c.c. systems.
作者机构：
[Yu, Xue-Feng; He, Xingchen; Yu, XF; Liu, Yanliang; Liu, Wenjun; Li, Dong; Shi, Tongyu; Wang, Jiahong; Huang, Hao] Chinese Acad Sci, Shenzhen Inst Adv Technol, Mat Interfaces Ctr, Shenzhen, Guangdong, Peoples R China.;[Sun, XM; Sun, Xiangming; Gao, Chaosong; Wu, Meng] Cent China Normal Univ, Key Lab Quark & Lepton Phys, Wuhan, Hubei, Peoples R China.;[Zhang, Xin; Zhu, Jiongtao; Ge, Yongshuai; Liang, Dong] Chinese Acad Sci, Shenzhen Inst Adv Technol, Res Ctr Med Artificial Intelligence, Shenzhen, Guangdong, Peoples R China.;[Zheng, Hairong; Sheng, Zonghai; Ge, Yongshuai; Liang, Dong; Zheng, HR] Chinese Acad Sci, Shenzhen Inst Adv Technol, Paul C Lauterbur Res Ctr Biomed Imaging, Shenzhen, Guangdong, Peoples R China.;[Zheng, Hairong; Yu, Xue-Feng; Sheng, Zonghai; Ge, Yongshuai; Yu, XF; Liang, Dong; Zheng, HR] Chinese Acad Sci, Key Lab Biomed Imaging Sci & Syst, Shenzhen, Guangdong, Peoples R China.
通讯机构：
[Sun, XM ; Yu, XF; Ge, YS ; Zheng, HR; Yu, XF ] C;Chinese Acad Sci, Shenzhen Inst Adv Technol, Mat Interfaces Ctr, Shenzhen, Guangdong, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys, Wuhan, Hubei, Peoples R China.;Chinese Acad Sci, Shenzhen Inst Adv Technol, Res Ctr Med Artificial Intelligence, Shenzhen, Guangdong, Peoples R China.;Chinese Acad Sci, Shenzhen Inst Adv Technol, Paul C Lauterbur Res Ctr Biomed Imaging, Shenzhen, Guangdong, Peoples R China.
摘要：
High performance X-ray detector with ultra-high spatial and temporal resolution are crucial for biomedical imaging. This study reports a dynamic direct-conversion CMOS X-ray detector assembled with screen-printed CsPbBr3, whose mobility-lifetime product is 5.2 x 10-4 cm2 V-1 and X-ray sensitivity is 1.6 x 104 mu C Gyair-1 cm-2. Samples larger than 5 cmx\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\times$$\end{document}10 cm can be rapidly imaged by scanning this detector at a speed of 300 frames per second along the vertical and horizontal directions. In comparison to traditional indirect-conversion CMOS X-ray detector, this perovskite CMOS detector offers high spatial resolution (5.0 lp mm-1) X-ray radiographic imaging capability at low radiation dose (260 nGy). Moreover, 3D tomographic images of a biological specimen are also successfully reconstructed. These results highlight the perovskite CMOS detector's potential in high-resolution, large-area, low-dose dynamic biomedical X-ray and CT imaging, as well as in non-destructive X-ray testing and security scanning. Biomedical X-ray imaging requires high spatial and temporal resolution of the detectors. Liu et al. report a screen-printed perovskite direct-conversion X-ray CMOS imager with a spatial resolution of 5 lp mm-1 and a speed of 300 fps for low-dose 2D radiography and 3D computed tomography imaging.
作者机构：
[Wenchang Xiang; Dewen Cao] Physics Division, Guangzhou Maritime University, Guangzhou 510725, China;[Daicui Zhou] Key Laboratory of Quark and Lepton Physics (MOE), and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
摘要：
We use the refined hot spot model to study the valence quark shape of the proton with the deeply virtual Compton scattering at high energies in the color glass condensate framework. To investigate the individual valence quark shape, a novel treatment of the valence quark width is employed. We calculate the cross-sections for coherent and incoherent deeply virtual Compton scattering using, for the first time, different widths ( and ) for the profile density distributions of the up and down quarks instead of using the same width as in the literature. We find that the cross-sections calculated with at each collision energy are consistent with each other, which is in agreement with theoretical expectations, whereas those computed with show some discrepancies. This outcome implies that the up quark might emit more gluons than the down quark, leading to at high energy. The impact of energy on the outcome is estimated. Our results show that as the collision energy increases, the aforementioned discrepancies are not only significantly broadened, but also shift to a relatively smaller momentum transfer range at the future Electron-Ion Collider (EIC) and Large Hadron Electron Collider (LHeC) energies, which indicates that the EIC and LHeC can provide an unprecedented chance to access the shape of the valence quark of the proton.
摘要：
Zincophilic property and high electrical conductivity are both very important parameters to design novel Zn anode for aqueous Zn-ion batteries (AZIBs). However, single material is difficult to exhibit zincophilic property and high electrical conductivity at the same time. Herein, originating from theoretical calculation, a zincophilic particle regulation strategy is proposed to address these limitations and carbon coated Na3V2(PO4)3 is taken as an example to be a protective layer on zinc metal (NVPC@Zn). Na3V2(PO4)3 (NVP) is a common cathode material for Zn-ion batteries, which is zincophilic. Carbon materials not only offer an electron pathway to help Zn deposition onto NVPC surface, but also enhance the zinc nucleophilicity of Na3V2(PO4)3. Hence, this hybrid coating layer can tune zinc deposition and resist side reactions such as hydrogen generation and Zn metal corrosion. Experimentally, a symmetrical battery with NVPC@Zn electrode displays highly reversible plating/stripping behavior with a long cycle lifespan over 1800 h at 2 mA cm-2, much better than carbon and Na3V2(PO4)3 solely modified Zn electrodes. When the Na3V2(PO4)3 is replaced with zincophobic Al2O3 or zincophilic V2O3, the stability of the modified zinc anodes is also prolonged. This strategy expands the option of zincophilic materials and provides a general and effective way to stabilize the Zn electrode. (c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
摘要：
In mm -wave massive multiple -input -multiple -output (MIMO) systems, accurate channel state information (CSI) at the base station (BS) is the key knowledge to obtain the performance gain. Consequently, the user is not only required to complete the channel estimation, but also to feedback CSI to the BS. However, large-scale antenna arrays result in a substantial feedback overhead, which poses a challenging issue. Furthermore, the accuracy requirements of channel estimation and CSI feedback depend on the computing capacity of the user. In this paper, we propose a joint channel estimation and multiple -compression -rate feedback (JCEMF) scheme, and adopt centralized learning (CL) and federated learning (FL) strategies for the scheme. According to the limited computational resources available to users, the JCEMF scheme enables various lengths of feedback bits to change the feedback overhead. Additionally, the users in FL train the local models using their own datasets and upload the local model updates to the BS, thereby reducing communication overhead and protecting data privacy. Specifically, an estimation network is designed for the user to estimate the channel from the received signal. In the CSI feedback process, we introduce an MCRF network, which can achieve CSI compression and reconstruction with different numbers of feedback bits. Simulation results verify that the proposed approach shows good performance of joint channel estimation and multiple -compression -rate CSI feedback in different channel conditions.
期刊：
Neural Computing and Applications,2024年 ISSN：0941-0643
通讯作者：
Qu, SC
作者机构：
[Qu, Shaocheng; Zheng, Wei; Tang, Qian] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zheng, Wei] Kashi Univ, Coll Phys & Elect Engn, Kashi 844000, Xinjiang, Peoples R China.
通讯机构：
[Qu, SC ] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Cellular neural network;Memristor;Sliding mode control;Chaotic synchronization;Secure communication
摘要：
The purpose of this research is to investigate the synchronization and control for uncertain memristor-based cellular neural network and its application in secure communication. To address the issue, a novel sliding mode function is designed, on which the system states can effectively converge to the equilibrium point after reaching the sliding mode surface. Moreover, the corresponding controller is constructed by employing the proposed sliding mode function. The proposed control strategy achieves the synchronization of the uncertain memristor-based cellular neural network, and effectively addresses the integral saturation existing in traditional one. In addition, the control performance, including convergence speed, control accuracy, robustness and security, are significantly enhanced. Furthermore, the stability of the system is discussed based on Lyapunov theory. Finally, comparative tests and application examples are presented to verify the effectiveness of the proposed scheme.
作者机构：
[Tang, Qian; Zhang, Chen] College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China;[Qu, Shaocheng] College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China. Electronic address: qushaocheng@mail.ccnu.edu.cn;[Tu, Zhengwen] College of Mathematics and Statistics, Chongqing Three Gorges University, Chongqing, 404100, China;[Cao, Yuting] School of Aeronautics and Astronautics, University of Electronic Science and Technology, Chengdu, 611731, China
通讯机构：
[Qu, Shaocheng] C;College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China. Electronic address:
关键词：
Average dwell time;Impulsive control;Prescribed-time synchronization;Switching complex networks
摘要：
The specified convergence time, designated by the user, is highly attractive for many high-demand applications such as industrial robot control, missile guidance, and autonomous vehicles. For the application of neural networks in the field of secure communication and power systems, the importance of prescribed-time synchronization(PTs) and stable performance of the system is more prominent. This paper introduces a prescribed-time controller without the fractional power function and sign function, which can reach synchronization at a prescribed time and greatly reduce the chattering phenomenon of neural networks. Additionally, by constructing synchronizing/desynchronizing impulse sequences, the PTs of switching complex networks(SCN) is achieved with impulse effects, where the time sequences of switching and impulse occurrences in the networks are constrained by the average dwell time. This approach effectively reduces the impact of frequent mode switching on network synchronization, and the synchronization time can be flexibly adjusted within any physically allowable range to accommodate different application requirements. Finally, the effectiveness of the proposed control strategy is demonstrated by two examples.
作者机构：
School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;[Zhiming Li; Yuanfang Wu] Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China;[Ye-Yin Zhao] School of Physics and Electronic Engineering, Sichuan University of Science and Engineering (SUSE), Zigong 643000, China;[Yunshan Cheng; Gang Wang] Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA;[Lizhu Chen] School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China<&wdkj&>Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
摘要：
Hyperorder cumulants C5/C1 and C6/C2 of net-baryon distributions are anticipated to offer crucial insights into the phase transition from quark-gluon plasma to hadronic matter in heavy-ion collisions. However, the accuracy of C5 and C6 is highly contingent on the fine shape of the distribution's tail, the detectable range of which could be essentially truncated by low statistics. In this paper, we use the fast Skellam-based simulations, as well as the ultrarelativistic quantum molecular dynamics model, to assess the impact of limited statistics on the measurements of C5/C1 and C6/C2 of net-proton distributions at lower energies available at the BNL Relativistic Heavy Ion Collider. Both ratios decrease from the unity baseline as we reduce statistics and could even turn negative without a pertinent physics mechanism. By incorporating statistics akin to experimental data, we can replicate the net-proton C5/C1 and C6/C2 values comparable to the corresponding measurements for Au+Au collisions at sNN=7.7 , 11.5, and 14.5 GeV. Our findings underscore a caveat to the interpretation of the observed beam energy dependence of hyperorder cumulants.
摘要：
The functional neurons are basic building blocks of the nervous system and are responsible for transmitting information between different parts of the body. However, it is less known about the interaction between the neuron and the field. In this work, we propose a novel functional neuron by introducing a flux-controlled memristor into the FitzHugh-Nagumo neuron model, and the field effect is estimated by the memristor. We investigate the dynamics and energy characteristics of the neuron, and the stochastic resonance is also considered by applying the additive Gaussian noise. The intrinsic energy of the neuron is enlarged after introducing the memristor. Moreover, the energy of the periodic oscillation is larger than that of the adjacent chaotic oscillation with the changing of memristor-related parameters, and same results is obtained by varying stimuli-related parameters. In addition, the energy is proved to be another effective method to estimate stochastic resonance and inverse stochastic resonance. Furthermore, the analog implementation is achieved for the physical realization of the neuron. These results shed lights on the understanding of the firing mechanism for neurons detecting electromagnetic field.
摘要：
Stochastic resonance and energy consumption are significant for information processing and transmission in the neural system. In this paper, we constructed an excitatory–inhibitory cortical neuronal network to investigate the response of the system to weak signals and the corresponding energy consumption. The findings indicate that the excitability of neurons modulates the performance of signal response. Furthermore, the performance of signal response exhibits a bell-shaped dependence on ion channel noise, which is a typical manifestation of the stochastic resonance phenomenon. Stochastic resonance also exists in the network with increasing noise at different excitatory coupling strengths and inhibitory coupling strengths. Furthermore, it is found that the neuronal system obtains optimal transmission of the weak signal at a lower energy consumption. It illustrates that there is a certain economy and efficiency in the signal transmission. At weak inhibitory coupling strength, an optimal excitatory coupling strength exists to allow the neuronal network to make the optimal transmission of the weak signal. However, the phenomenon of double resonant peaks occurs at strong inhibitory coupling strength, which is due to the balance of excitatory and inhibitory synaptic currents. Finally, we demonstrated the robustness of the results to network topology and initial conditions. The results of this paper may contribute to the understanding of signal transmission and its energy consumption in cortical networks.
摘要：
Non-profit sports organizations increasingly participate in government service procurement, seeking vital resources. This study conducted interviews with staff members of sports non-profit organizations in the central provinces of China to understand the impact of participating in government service procurement on non-profit sports organizations. The data was analyzed using NVivo12 software, in conjunction with Resource Dependency Theory (RDT) to propose three subject categories relevant to the subjects of this study, namely (a) resources obtained by the organisation, (b) attitudes of the organisation towards the government and (c) specific behaviours taken by the organisation. The -'government-public duality' of sports non-profit organisations in China makes the government purchase of services, not a fully marketable option. Organizations exhibit proactive behaviors beyond contractual obligations to nurture relationships. This study emphasizes the need to prevent the alienation of non-profit sports organizations in government service procurement, underscoring the importance of fostering and enhancing collaboration in the sports field.
期刊：
Physica A-Statistical Mechanics and its Applications,2024年637:129533 ISSN：0378-4371
通讯作者：
Liu, FY
作者机构：
[Yang, Chunbin; Liu, Feiyi; Deng, Weibing; Li, Wei; Chen, Xiangna; Liu, FY] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Liu, Feiyi; Deng, Weibing; Li, Wei; Liu, FY] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Liu, Feiyi; Papp, Gabor; Liu, FY] Eotv Lorand Univ, Inst Phys, 1-A Pazmany P Setany, H-1117 Budapest, Hungary.;[Chen, Shiyang] Baoshan Univ, Sch Engn & Technol, Baoshan 678000, Peoples R China.;[Shen, Jianmin] Max Planck Inst Math Sci, D-04103 Leipzig, Germany.
通讯机构：
[Liu, FY ] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Eotv Lorand Univ, Inst Phys, 1-A Pazmany P Setany, H-1117 Budapest, Hungary.
摘要：
Machine learning techniques exhibit significant performance in discriminating different phases of matter and provide a new avenue for studying phase transitions. We investigate the phase transitions of three dimensional q -state Potts model on cubic lattice by using a transfer learning approach, Domain Adversarial Neural Network (DANN). With the unique neural network architecture, it could evaluate the high -temperature (disordered) and low -temperature (ordered) phases, and identify the first and second order phase transitions. Meanwhile, by training the DANN with a few labeled configurations, the critical points for q = 2, 3, 4 and 5 can be predicted with high accuracy, which are consistent with those of the Monte Carlo simulations. These findings would promote us to learn and explore the properties of phase transitions in high -dimensional systems.
摘要：
The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy of
$$ \sqrt{s} $$
= 13 TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb−1 collected by the LHCb experiment. The measurement is performed with both J/ψ mesons in the transverse momentum range 0 < pT < 14 GeV/c and rapidity range 2.0 < y < 4.5. The cross-section of this process is measured to be 16.36 ± 0.28 (stat) ± 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference ∆y between the two J/ψ mesons. The effective cross-section of double-parton scattering is measured to be σeff = 13.1 ± 1.8 (stat) ± 2.3 (syst) mb. The distribution of the azimuthal angle ϕCS of one of the J/ψ mesons in the Collins-Soper frame and the pT-spectrum of the J/ψ pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of ⟨cos 2ϕCS⟩ and ⟨cos 4ϕCS⟩ are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
EUROPEAN PHYSICAL JOURNAL C,2024年84(3) ISSN：1434-6044
通讯作者：
Aaij, R
作者机构：
[Ketel, T.; Tuning, N.; Usachov, A.; de Boer, J.; Lukashenko, V.; Galati, M. D.; Heijhoff, K.; Magdalinski, D.; Akiba, K.; Aaij, R.; Aaij, R; Snoch, A.; Biolchini, A.; Jans, E.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Kostiuk, I.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.;[Baptista de Souza Leite, J.; De Freitas Carneiro Da Graca, U.; Massafferri, A.; Cruz Torres, M.; De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; Gomes, A.; Torres Machado, D.; dos Reis, A. C.; Santoro, L.] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil.;[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Souza De Almeida, F. L.; Gandelman, M.; Rangel, M. S.; Ferreira Rodrigues, F.; Hicheur, A.; Otalora Goicochea, J. M.; Gomes, A.; De Paula, L.; Nasteva, I.; Amato, S.; Meyer Garcia, L.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.;[Zheng, X. Z.; Ma, G. M.; Wang, Z.; Qu, S.; Qin, N.; Ren, Z.; Xu, L.; Tou, D. Y.; Wang, J.; Li, A.; Zhang, Y. Z.; Hu, X.; Song, Y.; Tan, Y.; Gong, G.; Lian, Z.; Kang, Y.; Qi, H. R.; Zhu, X.; Luo, Y.; Yang, D.; Mu, H.; Zeng, M.; Dong, C.; Zhang, L.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.;[Lu, Y.; Li, Y.; Yuan, X.; Sheng, S.; Li, T.; Wang, J.; Chen, S.; Xu, Z.; Tobin, M.; Miao, D.; Jiang, X.; Batsukh, B.; Zou, Q.; Feng, M.; Liu, S.; Xiang, Z.] Inst High Energy Phys IHEP, Beijing, Peoples R China.
作者机构：
[Ketel, T.; Mulder, M.; Tuning, N.; Perez, D. H. Campora; Usachov, A.; de Boer, J.; de Vries, J. A.; Lukashenko, V.; Galati, M. D.; Heijhoff, K.; Akiba, K.; Aaij, R.; Aaij, R; Snoch, A.; De Bruyn, K.; Biolchini, A.; Martinez, M. Lucio; Jans, E.; Vos, K.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; Onderwater, C. J. G.; Bolognani, C. S.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Pawley, C. J.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Nicotra, D.; Raven, G.; Sole, S. Ferreres; Kostiuk, I.; Schubiger, M.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.;[Da Graca, U. De Freitas Carneiro; Massafferri, A.; De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; Torres, M. Cruz; Machado, D. Torres; Gomes, A.; dos Reis, A. C.; Santoro, L.; Leite, J. Baptista de Souza] CBPF, Rio De Janeiro, Brazil.;[De Paula, B. Souza; Lopes, J. H.; Goicochea, J. M. Otalora; Polycarpo, E.; Gandelman, M.; Rangel, M. S.; Hicheur, A.; Barbosa, I. R.; Gomes, A.; Garcia, L. Meyer; Rodrigues, F. Ferreira; Goebel, C.; De Paula, L.; Nasteva, I.; Amato, S.; De Almeida, F. L. Souza] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil.;[Cai, H.; Bian, L.; Liu, G.; Xian, S.; Wang, Z.; Qu, S.; Qin, N.; Li, T.; Ren, Z.; Xu, L.; Tou, D. Y.; Huang, X.; Li, H.; Wang, J.; Li, A.; Hu, X.; Hu, J.; Song, Y.; Tan, Y.; Gong, G.; Wang, X.; Bursche, A.; Lian, Z.; Kang, Y.; Fang, B.; Qi, H. R.; Zhu, X.; Sun, L.; Luo, Y.; Yang, D.; Mu, H.; Zeng, M.; Dong, C.; Zhang, L.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.;[Lu, Y.; Li, Y.; Yuan, X.; Sheng, S.; Li, T.; Wang, J.; Feo, M.; Chen, S.; Xu, Z.; Tobin, M.; Miao, D.; Jiang, X.; Batsukh, B.; Zou, Q.; Liu, S.; Xiang, Z.] IHEP, Beijing, Peoples R China.
摘要：
The first observation of the singly Cabibbo-suppressed 0c -> -K thorn and 0c -> -z thorn decays is reported, using proton -proton collision data at a center -of -mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be Bo0c ->-K thorn thorn Bo0c ->-z thorn thorn 1/4 1/26.08 ⠂ 0.51ostat thorn ⠂ 0.40osyst thorn ⠃%; Bo0c ->-z thorn thorn Bo0c ->-z thorn thorn 1/4 1/215.81 ⠂ 0.87ostat thorn ⠂ 0.44osyst thorn ⠂ 0.16oext thorn ⠃%. In addition, using the 0c -> -z thorn decay channel, the 0c baryon mass is measured to be Mo0c thorn 1/4 2695.28 ⠂ 0.07ostat thorn ⠂ 0.27osyst thorn ⠂ 0.30oext thorn MeV; improving the precision of the previous world average by a factor of 4.
作者机构：
[Dengke Zhou; Jianhua Fang; Chenchen Miao; Huaxi Chen; Yi Feng; Jintao Xie; Xu Zhang; Chenwu Jin; Han Wang; Yinan Ke; Xuerong Guo] Research Center for Astronomical Computing, Zhejiang Laboratory, Hangzhou, China;[Mengyao Xue] National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China;Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing, China;University of Chinese Academy of Sciences, Beijing, China;New Cornerstone Science Laboratory, Shenzhen, China
通讯机构：
[Pei Wang; Di Li] N;National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China<&wdkj&>Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing, China<&wdkj&>National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China<&wdkj&>University of Chinese Academy of Sciences, Beijing, China<&wdkj&>New Cornerstone Science Laboratory, Shenzhen, China
摘要：
Globular clusters harbor numerous millisecond pulsars, but long-period pulsars (P ≳ 100 ms) are rarely found. In this study, we employed a fast folding algorithm to analyze observational data from multiple globular clusters obtained by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), aiming to detect the existence of long-period pulsars. We estimated the impact of the median filtering algorithm in eliminating red noise on the minimum detectable flux density (Smin) of pulsars. Subsequently, we successfully discovered two isolated long-period pulsars in M15 with periods approximately equal to 1.928451 and 3.960716 s, respectively. On the
$$P - \dot P$$
diagram, both pulsars are positioned below the spin-up line, suggesting a possible history of partial recycling in X-ray binary systems disrupted by dynamical encounters later on. According to timing results, these two pulsars exhibit remarkably strong magnetic fields. If the magnetic fields were weakened during the accretion process, then a short duration of accretion might explain the strong magnetic fields of these pulsars.
