摘要：
In recent years, the coexistence of different states in the neural system has attracted widespread interest. Researchers have found a coexisting state of spiking and resting in homogeneous networks, which is known as the chimera-like state. The real cortical network is a much more complex and heterogeneous network. Therefore, the excitatory-inhibitory cortical neuronal network is constructed based on Hodgkin-Huxley neuronal model in this paper, and the chimera-like state is further investigated in the heterogeneous network. It is found that the chimera-like state is related to the balance between excitatory and inhibitory synaptic currents. The excitatory coupling current can counteract the initial condition effect and promote synchronized firing of neurons in the network. The inhibitory coupling current desynchronizes the network and thus induces synaptic noise, resulting in an inverse bell-shaped dependence of the change in the number of spiking neurons. We analyzed the underlying mechanisms of synaptic noise in the phase plane diagram and found it has asymmetry for the neuronal state transition. In addition, neurons with low degrees have a higher probability of undergoing state transitions. Finally, we verified that the chimera-like state is robust to network topology and initial conditions. The results provide a new insight into neuronal interactions in heterogeneous networks and might help to reveal the mechanisms of coexistence of different states in the cortical network.
通讯机构：
[Huang, GM ] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
scalar magnetometer;subsea power cables;attitude-independent detection;route tracking;high sea condition
摘要：
To overcome the shortcoming wherein the accuracy of subsea cable detection can be affected by the determination of the bias vector, scale factors, and non-orthogonality corrections of the vector magnetometer, a real-time attitude-independent route tracking method for subsea power cables is investigated theoretically and experimentally by means of scalar magnetic field checking. The measurement of the magnetic field B-c produced by the current in a cable is made immune to the influence of the platform attitude by extracting the component of B-c along the geomagnetic field using a high-bandwidth self-oscillating optically pumped magnetometer. The self-oscillating frequency is proved to be independent of the attitude of the magnetometer with the theoretical model. Experiments are carried out to test the attitude-independent performance, and the effectiveness of route tracking is verified by the results of the sea experiment. The proposed method will effectively improve the ability to locate subsea cables under high sea conditions.
期刊：
Journal of Instrumentation,2024年19(03):C03031 ISSN：1748-0221
通讯作者：
Gao, C.;Zhang, D
作者机构：
[Yang, Y.] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.;[Yang, Y.] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.;[Gao, C.; Liu, L.; Zhang, D; Gao, C; Wang, H.; Qiao, Y.; Zhang, D.; Huang, G.; Liang, T.; Chen, K.; Hu, Z.; Sun, X.; Liu, J.] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.;[Tian, X.] Hubei Univ Sci & Technol, Sch Resources Environm Sci & Engn, Xianning 437100, Peoples R China.;[Song, Z.] Naval Univ Engn, Coll Elect Engn, Wuhan 430033, Peoples R China.
通讯机构：
[Zhang, D ; Gao, C] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.
关键词：
Analogue electronic circuits;CMOS readout of gaseous detectors;Front-end electronics for detector readout
摘要：
This paper presents the design and electrical test results of a low-noise front-end chip (named Topmetal-S) in a High-pressure Time Projection Chamber (TPC) for searching the neutrinoless double beta decay. The Topmetal-S has been fabricated in a 130 nm CMOS technology. The proposed front-end chip consists of a charge collection electrode, a Charge Sensitive Amplifier (CSA) and peripheral circuits. The test results indicate that the CSA features an input linear dynamic range of approximately 6.64 fC, a charge-conversion gain of about 220 mV/fC and an Equivalent Noise Charge (ENC) of approximately 115e(-) after a digital trapezoidal pulse shaper.
作者机构：
[Jia-Hao Wang] College of Science, China Three Gorges University, Yichang 443002, China;Center for Astronomy and Space Sciences and Institute of Modern Physics, China Three Gorges University, Yichang 443002, China;Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China;[Sheng-Qin Feng] College of Science, China Three Gorges University, Yichang 443002, China<&wdkj&>Center for Astronomy and Space Sciences and Institute of Modern Physics, China Three Gorges University, Yichang 443002, China<&wdkj&>Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
通讯机构：
[Sheng-Qin Feng] C;College of Science, China Three Gorges University, Yichang 443002, China<&wdkj&>Center for Astronomy and Space Sciences and Institute of Modern Physics, China Three Gorges University, Yichang 443002, China<&wdkj&>Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
摘要：
The impact of rotation on the deconfinement phase transition under the Einstein-Maxwell system of the soft and the hard wall models in holographic quantum chromodynamics is studied in this paper. The metric by cylindrical coordinates with rotation is introduced into the system to calculate the Hawking temperature. The first holographic study on the influence of the radius of a homogeneous rotating system on the phase diagram is proposed. It is found that the phase transition temperature hardly changes with the rotation angular velocity for a small rotation radius. Only with a larger rotation radius can the change in rotational angular velocity significantly alter the phase transition temperature. The phase transition temperature decreases rapidly with the increase of rotation angular velocity as the rotation radius increases.
作者：
R. Aaij;A. S. W. Abdelmotteleb;C. Abellan Beteta;F. Abudinén;T. Ackernley;...
期刊：
Journal of High Energy Physics,2024年2024(4):1-52 ISSN：1029-8479
通讯作者：
P. Robbe
作者机构：
[R. Aaij; K. Akiba; A. Biolchini; J. de Boer; S. Ferreres Sole; E. Gabriel; M. D. Galati; R. E. Geertsema; L. M. Greeven; K. Heijhoff; W. Hulsbergen; E. Jans; T. Ketel; P. Koppenburg; I. Kostiuk; D. Magdalinski; A. Pellegrino; C. Sanchez Gras; A. Snoch; N. Tuning; M. van Veghel] Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands;[A. S. W. Abdelmotteleb; F. Abudinén; J. J. Back; A. Beck; T. Blake; M. F. Cicala; A. Davidson; T. Gershon; L. Grazette; R. J. Hunter; T. P. Jones; M. Kreps; T. Latham; M. Lehuraux; E. Muhammad; B. Pagare; L. Paolucci; M. Ramos Pernas; F. Swystun; M. Vesterinen; A. R. Wiederhold; M. Xu] Department of Physics, University of Warwick, Coventry, United Kingdom;[C. Abellan Beteta; M. Andersson; P. Andreola; V. Bellee; R. Bernet; C. Betancourt; Ia. Bezshyiko; A. Buonaura; D. C. Craik; D. De Simone; V. Denysenko; J. Eschle; S. Esen; M. Ferrillo; D. Lancierini; A. Mathad; K. Müller; P. Owen; O. Steinkamp; A. Terentev] Physik-Institut, Universität Zürich, Zürich, Switzerland;[T. Ackernley; T. J. V. Bowcock; J. Brown; G. Casse; A. J. Chadwick; C. A. Chavez Barajas; T. Halewood-leagas; J. Hammerich; T. Harrison; K. Hennessy; N. Howarth; D. Hutchcroft; P. J. Marshall; P. Naik; K. Rinnert; S. Scherl; T. Shears; E. Vilella Figueras] Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom;[B. Adeva; P. Baladron Rodriguez; S. Belin; A. Brea Rodriguez; A. Brossa Gonzalo; J. Cambon Bouzas; L. Carcedo Salgado; X. Cid Vidal; I. Corredoira; J. Dalseno; C. Eirea Orro; M. Fernandez Gomez; A. Gallas Torreira; B. Garcia Plana; C. Landesa Gomez; J. Lomba Castro; S. López Soliño; D. Martinez Santos; A. Morcillo Gomez; J. Novoa Fernandez; A. Pereiro Castro; M. Plo Casasus; C. Prouve; E. Rodriguez Fernandez; E. Rodriguez Rodriguez; M. Romero Lamas; A. Romero Vidal; R. A. Ruiz Fernandez; J. J. Saborido Silva; C. Santamarina Rios; S. Sellam; P. Vazquez Regueiro; C. Vázquez Sierra] Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
通讯机构：
[P. Robbe] U;Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
关键词：
QCD;Heavy Quark Production;Particle and Resonance Production;Hadron-Hadron Scattering
摘要：
The production of ψ(2S) mesons in proton-lead collisions at a centre-of-mass energy per nucleon pair of
$$ \sqrt{s_{\textrm{NN}}} $$
= 8.16 TeV is studied with the LHCb detector using data corresponding to an integrated luminosity of 34 nb−1. The prompt and nonprompt ψ(2S) production cross-sections and the ratio of the ψ(2S) to J/ψ cross-section are measured as a function of the meson transverse momentum and rapidity in the nucleon-nucleon centre-of-mass frame, together with forward-to-backward ratios and nuclear modification factors. The production of prompt ψ(2S) is observed to be more suppressed compared to pp collisions than the prompt J/ψ production, while the nonprompt productions have similar suppression factors.
作者机构：
[Yang, Zhong; Wang, Xin-Nian] Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.;[Yang, Zhong; Wang, Xin-Nian] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[He, Yayun] South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China.;[He, Yayun] South China Normal Univ, Southern Nucl Sci Comp Ctr, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Guangdong, Peoples R China.;[Moult, Ian] Yale Univ, Dept Phys, New Haven, CT 06511 USA.
通讯机构：
[Yang, Z ] 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.
摘要：
Energy -energy correlators (EECs) are promising observables to study the dynamics of jet evolution in the quark -gluon plasma (QGP) through its imprint on angular scales in the energy flux of final -state particles. We carry out the first complete calculation of EECs using realistic simulations of high-energy heavy -ion collisions and dissect the different dynamics underlying the final distribution through analyses of jet propagation in a uniform medium. The EECs of gamma -jets in heavy -ion collisions are found to be enhanced by the medium response from elastic scatterings instead of induced gluon radiation at large angles. In the meantime, EECs are suppressed at small angles due to energy loss and transverse momentum broadening of jet shower partons. These modifications are further shown to be sensitive to the angular scale of the in -medium interaction, as characterized by the Debye screening mass. Experimental verification and measurement of such modifications will shed light on this scale and the short -distance structure of the QGP in heavy -ion collisions.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
Journal of High Energy Physics,2024年(1) ISSN：1029-8479
通讯作者：
Luo, Y
作者机构：
[Ketel, T.; Mulder, M.; Tuning, N.; Usachov, A.; Lukashenko, V; Galati, M. D.; Akiba, K.; Aaij, R.; Snoch, A.; De Bruyn, K.; Biolchini, A.; Kostiuk, I; Jans, E.; Heijhof, K.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; Onderwater, C. J. G.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Schubiger, M.; Hulsbergen, W.] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands.;[De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; de Souza Leite, J. Baptista; Torres, M. Cruz; Machado, D. Torres; Gomes, A.; Carneiro Da Graca, U. De Freitas; dos Reis, A. C.; Santoro, L.; Massaferri, A.] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil.;[De Paula, B. Souza; Lopes, J. H.; Polycarpo, E.; Souza De Almeida, F. L.; Gandelman, M.; Gobel, C.; Rangel, M. S.; Hicheur, A.; Nasteva, I; Barbosa, I. R.; Otalora Goicochea, J. M.; Gomes, A.; Garcia, L. Meyer; Rodrigues, F. Ferreira; De Paula, L.; Amato, S.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.;[Cai, H.; Bian, L.; Liu, G.; 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.; Li, P-R; Wang, J.; Chen, S.; Xu, Z.; Tobin, M.; Miao, D.; Liu, K.; Jiang, X.; Batsukh, B.; Zou, Q.; Feng, M.; Liu, S.] Inst High Energy Phys IHEP, Beijing, Peoples R China.
通讯机构：
[Luo, Y ] T;Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
关键词：
Heavy Quark Production;Relativistic Heavy Ion Physics;QCD;Heavy Ion Experiments
摘要：
The production of prompt D+ and D-s(+) mesons is studied in proton-lead collisions at a centre-of-mass energy of root s(NN) = 5.02TeV. The data sample corresponding to an integrated luminosity of (1.58 +/- 0.02)nb(-1) is collected by the LHCb experiment at the LHC. The differential production cross-sections are measured using D+ and D-s(+) candidates with transverse momentum in the range of 0 < p(T) < 14 GeV/c and rapidities in the ranges of 1.5 < y* < 4.0 and -5.0 < y* < -2.5 in the nucleon-nucleon centre-of-mass system. For both particles, the nuclear modification factor and the forward-backward production ratio are determined. These results are compared with theoretical models that include initial-state nuclear effects. In addition, measurements of the cross-section ratios between D+, D-s(+) and D-0 mesons are presented, providing a baseline for studying the charm hadronization in lead-lead collisions at LHC energies.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
Journal of Instrumentation,2024年19(03):P03010 ISSN：1748-0221
通讯作者：
Stanislaus, S
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.; Snoch, A.; Biolchini, A.; Jans, E.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; van Veghel, M.; 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.;[Monk, M.; Fujii, Y.; Egede, U.; Lane, J. J.; Henderson, R. D. L.; Hadavizadeh, T.; Song, R.; Ward, J. A.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia.;[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] Ctr Brasileiro Pesquisas Fisicas 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.; Garcia, L. Meyer; Rodrigues, F. Ferreira; De Paula, L.; Nasteva, I.; Amato, S.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.;[Zheng, X. Z.; Ma, G. M.; Wang, Z.; Qu, S.; Qin, N.; 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.
通讯机构：
[Stanislaus, S ] U;Univ Oxford, Dept Phys, Oxford, England.
关键词：
Analysis and statistical methods;Detector alignment and calibration methods (lasers, sources, particle-beams);Large detector-systems performance;Performance of High Energy Physics Detectors
摘要：
Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy root s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z -> mu(+)mu(-) decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10(-4) GeV-1 level, improves the Z -> mu(+)mu(-) mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.
期刊：
Sustainable Materials and Technologies,2024年40:e00875 ISSN：2214-9937
通讯作者：
Wei Sun<&wdkj&>Zhihong Zhu
作者机构：
[Songlin Zhao; Chengcai Wang; Luhang Cai; Yipeng Chen; Zhihong Zhu] Institute of Nano-science and Nano-technology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, PR China;[Wei Sun] Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, PR China
通讯机构：
[Wei Sun] K;[Zhihong Zhu] I;Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, PR China<&wdkj&>Institute of Nano-science and Nano-technology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, PR China
摘要：
The fabrication of distinct sites on the carbonized substrate as bifunctional oxygen catalysts is pivotal for enhancing the practicality of Zn-air batteries, but remains a formidable challenge. Herein, a gas doping strategy is reported for anchoring Ni nanoparticles and further increasing FeNx sites on biomass-derived Fe, N, and P co-doped porous carbonized materials as highly efficient bifunctional electrocatalysts. The inherent porous structure and heteroatom of rattan tea provide a superior carrier for Fe and Ni-based active species. Notably, the as-prepared Ni@FeNPC/Fef shows unprecedented capability for oxygen reduction reaction and excellent catalytic activity for oxygen evolution reaction. In situ Raman spectroscopy studies shed light on the role of FeNx and heteroatom-doped carbon during the oxygen reduction reaction. Density functional theory calculations verify the catalytic mechanism on various active sites of Ni@FeNPC/Fef. Moreover, the Ni@FeNPC/Fef-based Zn-air battery maintains cyclic stability for over 400 h with negligible voltage degradation. This strategy endows a novel route for converting biomass into practical electrocatalysts for diverse energy-related systems.
摘要：
PURPOSE: Lack of adequate physical exercise is the main reason for the frequent occurrence of health problems among Chinese college students. The purpose of this study is to explore the effects of control beliefs on cardiovascular fitness among college students and the mediating role of subjective exercise experience and exercise adherence in it. METHODS: The Control Belief Scale, the Subjective Exercise Experience Scale (SEES), and the Exercise Adherence Scale were used to investigate 1854 freshmen and sophomores in Nantong and Suzhou, China. Cardiovascular fitness data for college students from the National Student Physical Health Standard and SPSS 23.0 statistical analysis software were used to carry out statistics and analyses on the questionnaires. Correlation analysis, regression analysis, and mediation models were used to assess control beliefs, subjective exercise experiences, exercise adherence, and cardiovascular fitness. RESULTS: The control belief of college students was directly related to cardiovascular fitness (effect value: 0.121), the mediating effect through subjective exercise experience was not significant, indirectly related through the mediating effect of exercise adherence (effect value: 0.101), and indirectly related through the mediating effect of subjective exercise experience and exercise adherence (effect value: 0. 019). The positive prediction effect of control belief on cardiovascular fitness of college students was significant (β = 0.267, P < 0.001), and the positive prediction effect of control belief on cardiovascular fitness of college students was still significant (β = 0.121, P < 0.01) after adding the intermediary variables (subjective exercise experience and exercise adherence). CONCLUSIONS: The cardiovascular fitness of college students was not only directly affected by control beliefs but also affected by the chain mediating effect of subjective exercise experience and exercise adherence. Therefore, it is necessary to improve the control beliefs, subjective exercise experiences, and exercise adherence of college students to improve their cardiovascular fitness level and enhance their physical health.
摘要：
The security performance of image encryption schemes based on chaotic systems has been greatly improved. Specifically, those chaotic systems with high-dimension or special attractors have shown more benefits for enhancing performance. By introducing the tangent function, a 4-dimensional chaotic system with infinite coexisting attractors is constructed. And the dynamical behaviors are analyzed through phase diagrams, bifurcation diagrams, Lyapunov exponent spectrum and spectral entropy complexity diagram. The results demonstrate that the system exhibits self-replication with respect to the initial value y0 and possesses rich dynamical properties, such as infinite coexisting attractors, sensitivity to initial values and period-doubling bifurcation. These characteristics make it suitable for chaotic cryptography applications. Subsequently, a lossless double color image encryption scheme is designed based on the constructed system. The scheme adopts a diffusion-scrambling-diffusion processing method, and cleverly utilizes the information of the original plaintext image in the scrambling process, which significantly enhances the ability to resist known plaintext attacks or selected plaintext attacks. The experimental results verify that the designed algorithm not only effectively encrypts color and grayscale images, but also allows for encryption images of any size. Moreover, the algorithm implementation process is efficient and ensures high security performance, effectively resisting differential attacks, rotation attacks and cropping attacks. This research exploration on the chaotic characteristics of the nonlinear high-dimensional system and its application in image encryption is expected to provide theoretical guidance in the field of secure communication.
作者机构：
[Jiang, Zefang; Yuan, Xuefei; Ye, Shasha; Jiang, ZF] Hubei Engn Univ, Dept Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Jiang, Zefang; Jiang, ZF] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Jiang, ZF ] H;Hubei Engn Univ, Dept Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.
关键词：
global polarization splitting;Lambda/Lambda hyperons;hydrodynamic model CLVisc;finite net baryon density
摘要：
We present a systematic study of the global polarization of Lambda and Lambda hyperons in Au+Au collisions at root s(NN)=19.6 GeV using the viscous hydrodynamic model CCNU-LBNL-Viscous hydrodynamic model (CLVisc) with a modified 3D optical Glauber model initial condition. The global polarization splitting as a function of transverse momentum and rapidity is investigated. It is shown that the magnitude of the net baryon density and its longitudinal titled geometry at the initial stage both have significant effects on the global polarization splitting of Lambda and Lambda over bar hyperons. Specifically, an increase in the magnitude of the net baryon density leads to a corresponding minor increase in the global polarization splitting. Similarly, alterations in the tilted geometry of net baryon density results in significant changes in the splitting of the global polarization.
摘要：
The simplicial contagion model is employed to study the spreads of two epidemics with mutation in high-order networks. The original epidemic can give birth to a mutated epidemic, but not vice versa. Numerical simulations and mean-field theory results reveal that the spread of the mutated epidemic is entirely dependent on the original epidemic if it cannot spread independently. Conversely, the spread of the original epidemic is entirely inhibited when mutated epidemic spreads by itself. The stability analysis of mean-field theory explains the extinction of the original epidemic and the emergence of a bistable region. Two stable equilibrium points remain unchanged despite variations in parameters like the original epidemic's infection probabilities and mutation rates. While the neighborhood of the stable equilibrium points is regulated by the above parameters. Our conclusions have also been validated in real-world networks.
作者机构：
[Zhao, D.] Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Wang, J. B.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.; Li, D.] Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Wang, J. B.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.] Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.] Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, P.; Meng, L. Q.; Xue, M. Y.; Zhu, W. W.; Zhang, L.; Chen, Y. T.; Miao, X. L.; Niu, J. R.; Niu, C. H.; Qian, L.; Yuan, M.; Li, D.; Yue, Y. L.] Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China.
通讯机构：
[Wang, N ] C;Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China.;Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.
摘要：
We report the timing analysis of PSR J1846-0513, a pulsar discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in Commensal Radio Astronomy FAST Survey. The pulsar possesses a spin period of 23.36 ms and a spin-down rate ( P ) of 1.0106(3) x 10-18 s s-1, and it is located in an eccentric orbit (e similar to 0.208) with an orbital period of 0.61 days. The characteristic age and surface magnetic field of the pulsar are found to be 366.62 Myr and 4.9178 x 109 G, respectively, indicating that it is a recycled pulsar. Using over two years of timing data, we measure the periastron advance omega = 0.8956(8) deg yr-1. By assuming that this effect is purely relativistic, we have estimated the total mass M = 2.6287(35)M circle dot and obtained an upper limit for the pulsar mass and a lower limit for the companion's mass. Our results indicate that this is a double neutron star system.
通讯机构：
[Zhang, DL; Chen, K ; Wang, HL] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.;Hubei Prov Engn Res Ctr Silicon Pixel Chip & Detec, Wuhan 430079, Peoples R China.
关键词：
CMOS readout of gaseous detectors;Front-end electronics for detector readout;Gaseous imaging and tracking detectors;Time projection Chambers (TPC)
摘要：
Within the project of building a time projection chamber using 100 kg of high-pressure 82SeF6 gas to search for the neutrinoless double -beta decay in the NvDEx collaboration, we are developing a CMOS charge sensor, named Topmetal-S, which is tailored for the experiment to detect the ions without gas amplification. In this work, the performance of the sensor is presented. The equivalent noise charge of the sensor is measured to be about 120 to 140 e- depending on the operating point, with the charge injection capacitance calibrated against external capacitors. The signal waveforms are investigated with various chip parameters and experimental settings. In addition to electrons, both negatively and positively charged ions could be detected, and their waveforms are studied using air and SF6 gases. Using the sensor, the mobility of negative ions in ambient air in the atmospheric pressure is measured to be 1.555 +/- 0.038 cm2 center dot V-1 center dot s-1. Our study demonstrates that the Topmetal-S chip could be used as the ion detection charge sensor for the experiment. Further work is ongoing to reduce the noise of the sensor and to develop a small readout plane with tens of the sensors.
作者机构：
[Qiang Wang; Jia-Hao Shi; Zhi-Ying Qin; Wen-Chao Zhang] School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China;[An-Ke Lei] Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China;[Zhi-Lei She] School of Mathematical and Physical Sciences, Wuhan Textile University, Wuhan 430200, China;[Yu-Liang Yan; Ben-Hao Sa] China Institute of Atomic Energy, P. O. Box 275 (10), Beijing 102413, China;[Kai-Fan Ye] School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China<&wdkj&>Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
摘要：
In this work we investigate the J/ψ production in proton-proton collisions at the center-of-mass energy (s) equal to 2.76, 5.02, 7, 8, and 13 TeV with the parton and hadron cascade model PACIAE 2.2a. It is based on PYTHIA but extended considering the partonic and hadronic rescatterings before and after hadronization, respectively. In the PYTHIA sector the J/ψ production quantum chromodynamics processes are selected specially and a bias factor is proposed correspondingly. The calculated total cross sections, the transverse momentum differential, and the rapidity differential cross sections of J/ψ in the forward rapidity region reproduce the corresponding experimental measurements reasonably well. In the mid-rapidity region, the double-differential cross sections at s=5.02 , 7, and 13 TeV are also in a good agreement with the experimental data. Moreover, we interpolate the double-differential cross section as well as the total cross section of J/ψ in the mid-rapidity region at s=8 TeV, which could be validated if the experimental data are available.
作者机构：
[Cao, Shanshan; Xing, Wen-Jing] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China.;[Qin, Guang-You; Xing, Wen-Jing] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Qin, GY ] C;[Cao, SS ] S;Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
摘要：
The quenching of light and heavy flavor hadrons in relativistic heavy-ion collisions probes the color and flavor dependences of parton energy loss through a color-deconfined quark-gluon plasma (QGP), and thus reveals the properties of QCD matter at extremely high density and temperature. By combining a next-to-leading order perturbative QCD calculation of parton production, a general ansatz of parton energy loss functions and parton fragmentation functions, we calculate the nuclear modification of various hadron species -- charged hadrons, D mesons and B-decayed J/psi -- over a wide transverse momentum regime. Comparing our calculations to the experimental data using the Bayesian statistical analysis, we perform a first simultaneous extraction of the energy loss functions of gluons (g), light quarks (q), charm quarks (c) and bottom quarks (b) inside the QGP. We find that the average parton energy loss at high energies follows the expected hierarchy of <Delta E-g >><Delta E-q >similar to <Delta E-c >><Delta Eb >, while the parton energy loss distribution can further test the QCD calculations of parton interaction with the dense nuclear matter. We also find that the reduction of experimental uncertainties can significantly improve the precision of the extracted parton energy loss functions inside the QGP.
关键词：
Hot spot model;Exclusive vector meson production;Color Glass Condensate
摘要：
We show within proton hot spot picture that the exclusive vector meson production in electron-proton deeply inelastic scattering is sensitive to the individual width of the constituent quarks of the proton. For comparison, we calculate the exclusive J/Psi production cross-sections in three cases, B-u >= B-d, B-u < B-d and B-u not equal B-u(' )not equal B-d, where the B-u, B-u(') and Bd denote the widths of two up quarks and a down quark. We find that only results calculated with B-u >= B-d can give a reasonable description of the exclusive J/Psi production cross-section data at HERA. To test that our results are independent of the details of the model, we retain the average width of the three constituent quarks unchanged and compute the exclusive J/Psi production cross-sections with contribution weight by setting different proportional coefficients (W-u and W-d) for the up and down quarks, respectively. It shows that the results calculated with W-u >= W-d can well reproduce the exclusive J/Psi production data at HERA, while the opposite case cannot describe the HERA data. These interesting findings seem to indicate that the up quark has more gluons around it than the down quark at high energy although the spatial distribution of gluons fluctuates event-by-event. To ensure the relevant results independent of the species of the vector meson, we also calculate the rho production cross-sections with the same group of parameters used in the exclusive J/Psi production and compare the predictions with the HERA data. It shows that all the results computed in the exclusive rho productions are consistent with the findings obtained in the exclusive J/Psi productions.
作者机构：
[Zeng, Chunhua; Zeng, CH; Sun, Peng; Zhao, Yuxiang] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China.;[Zeng, Chunhua; Zeng, CH] Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China.;[Zeng, Chunhua; Zeng, CH; Sun, Peng; Zhao, Yuxiang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Dong, Hongxin] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China.;[Dong, Hongxin] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China.
通讯机构：
[Zeng, CH ] C;Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China.;Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
摘要：
We present a phenomenological extraction of transversity distribution functions and Collins fragmentation functions by simultaneously fitting to semi -inclusive deep inelastic scattering and electron -positron annihilation data. The analysis is performed within the transverse -momentum -dependent factorization formalism, and sea quark transversity distributions are taken into account for the first time. We find the u over bar quark favors a negative transversity distribution, while that of the d over bar quark is consistent with zero according to the current accuracy. In addition, based on a combined analysis of world data and simulated data, we quantitatively demonstrate the impact of the proposed Electron -Ion Collider in China on precise determinations of the transversity distributions, especially for sea quarks, and the Collins fragmentation functions.
