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Detecting neutrinos from supernova bursts in PandaX-4T

Chinese physics C 2024年第7期48卷 14-21页

作者：庞彬宇阿布都沙拉木·阿布都克力木薄子豪陈葳谌勋程晨成兆侃崔祥仪樊英杰方德清符长波付孟婷耿立升 Karl Giboni 顾琳慧郭绪元韩晨成韩柯何昶达何金荣黄迪黄彦霖黄俊挺黄周侯汝全侯钰季向东巨永林李晨翔李家富李名川李帅杰李涛林箐刘江来陆聪聪芦晓盈罗棱尹罗云阳马文博马余刚冒亚军孟月宁旭阳祁宁春钱志成任祥祥 Nasir Shaheed 尚晓凤邵熙元申国防司琳孙文良谈安迪陶奕王安庆王萌王秋红王少博王思广王为王秀丽王舟魏月环武蒙蒙邬维浩夏经铠肖梦姣肖翔谢鹏伟燕斌斌颜玺雨杨继军杨勇姚玉坤喻纯旭袁影苑哲鑫宁张丹张敏桢张鹏张世博张澍张涛张洋张瀛心张园园赵力郑其斌周济芳周宁周小朋周永周钰博 New Cornerstone Science laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai200240China research center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237ShandongChina key laboratory of Particle physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237ShandongChina school of physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan research Institute Chengdu 610213China school of physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of nuclear engineering and Technology Sun Yat-Sen UniversityZhuhai519082China Department of physics Yantai UniversityYantai 264005China key laboratory of nuclear physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China school of physics Peking UniversityBeijing 100871China school of physics Beihang UniversityBeijing 102206China international research center for nuclei and particles in the cosmos&beijing key laboratory of advanced nuclear materials and physics Beihang UniversityBeijing 100191China school of physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China school of Medical Instrument and Food engineering University of Shanghai for Science and TechnologyShanghai 200093China school of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of physics University of MarylandCollege ParkMaryland 20742USA State key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern physics University of Science and Technology of ChinaHefei 230026China school of physics Nankai UniversityTian

Neutrinos from core-collapse supernovae are essential for understanding neutrino physics and stellar ***-phase xenon dark matter detectors can be used to track explosions of galactic supernovae by detecting neutrinos through coherent elastic neutrino-nucleus *** this study,a variation of progenitor masses and explosion models are assumed to predict neutrino fluxes and spectra,which result in the number of expected neutrino events ranging from 6.6 to 13.7 at a distance of 10 kpc over a 10-s duration with negligible backgrounds at *** specialized triggering alarms for monitoring supernova burst neutrinos are *** efficiency of detecting supernova explosions at various distances in the Milky Way is *** alarms will be implemented in the real-time supernova monitoring system at PandaX-4T in the near future,which will provide supernova early warnings for the astronomical community.

关键词： core-collapse supernovae neutrinos liquid xenon detectors supernova early warnings

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Waveform simulation in PandaX-4T

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Chinese physics C 2024年第7期48卷 1-13页

作者：李家富阿卜杜萨拉姆薄子豪陈葳谌勋程晨成赵侃崔祥仪樊英杰方德清耿立升 Karl Giboni 郭绪元韩晨成韩柯何昶达何金荣黄迪黄俊挺黄周侯汝全侯钰季向东巨永林李晨翔李名川李帅杰李涛林箐刘江来陆聪聪芦晓盈罗棱尹罗云阳马文博马余刚冒亚军孟月宁旭阳庞彬宇祁宁春钱志成任祥祥 Nasir Shaheed 尚晓凤邵熙元申国防司琳孙文良谈安迪陶奕王安庆王萌王秋红王少博王思广王为王秀丽王旭王舟魏月环武蒙蒙邬维浩吴渊肖梦姣肖翔燕斌斌阎玺宇杨勇喻纯旭袁影苑哲运有辉曾鑫宁张敏桢张鹏张世博张澍张涛张威张洋张瀛心张园园赵力周济芳周宁周小朋周永周钰博周知震 school of physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China State key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern physics University of Science and Technology of ChinaHefei 230026China school of physics Beihang UniversityBeijing 102206China international research center for nuclei and particles in the cosmos&beijing key laboratory of advanced nuclear materials and physics Beihang UniversityBeijing 100191China school of physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China school of physics Peking UniversityBeijing 100871China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China research center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China key laboratory of Particle physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China Department of physics University of MarylandCollege ParkMaryland 20742USA Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai200240China school of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China school of physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of nuclear engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China school of physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China school of physics Nankai UniversityTianjin 300071China key laboratory of nuclear physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan research Institute Chengdu 610213China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China Department of physics Yantai UniversityYantai 264005Ch

Signal reconstruction through software processing is a crucial component of the background and signal models in the PandaX-4T experiment,which is a multi-tonne dark matter direct search *** accuracy of signal reconstruction is influenced by various detector artifacts,including noise,dark count of photomultiplier,photoionization of impurities in the detector,and other relevant *** this study,we presented a detailed description of a semi-data-driven approach designed to simulate a signal *** work provides a reliable model for the efficiency and bias of the signal reconstruction in the data analysis of *** comparing critical variables that relate to the temporal shape and hit pattern of the signals,we found good agreement between the simulation and data.

关键词： dark matter time projection chamber simulation

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Single particles in a reflection-asymmetric potential

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Science China(physics,Mechanics & Astronomy) 2018年第8期61卷 61-68页

作者： YuanYuan Wang ZhengXue Ren school of physics and nuclear energy engineering and international research center for nuclei and particles in the cosmos Beihang University State key laboratory of nuclear physics and Technology School of Physics Peking University

Single particles moving in a reflection-asymmetric potential are investigated by solving the Schr6dinger equation of the reflectionasymmetric Nilsson Hamiltonian with the imaginary time method in 3D lattice space and the harmonic oscillator basis expansion method. In the 3D lattice calculation, the l2 divergence problem is avoided by introducing a damping function, and the（l2）N term in the non-spherical case is calculated by introducing an equivalent N-independent operator. The efficiency of these numerical techniques is demonstrated by solving the spherical Nilsson Hamiltonian in 3D lattice space. The evolution of the single-particle levels in a reflection-asvmmetric ootential is obtained and discussed bv the above two numerical methods, and their consistencv is shown in the obtained single-particle energies with the differences smaller than 10-4[hω0]

关键词： single particles reflection-asymmetric potential imaginary time method harmonic oscillator basis expansion method

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Evolution of N=28 shell closure in relativistic continuum Hartree-Bogoliubov theory

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Chinese physics C 2016年第7期40卷 55-62页

作者：夏学伟 school of physics and nuclear energy engineering and international research center for nuclei and particles in the cosmos Beihang University

The N = 28 shell gap in sulfur, argon, calcium and titanium isotopes is investigated in the framework of relativistic continuum Hartree-Bogoliubov （RCHB） theory. The evolutions of neutron shell gap, separation energy, single particle energy and pairing energy are analyzed, and it is found that the N = 28 shell gap is quenched in sulfur isotopes but persists in argon, calcium and titanium isotopes. The evolution of the N = 28 shell gap in the N = 28 isotonic chain is discussed, and the erosion of the N = 28 shell gap is understood with the evolution of potential with proton number.

关键词： N=28 shell closure RCHB theory shell evolution

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Effects of relativistic kinematics in heavy ion elastic scattering

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Chinese physics C 2014年第2期38卷 29-33页

作者：庞丹阳 school of physics and nuclear energy engineering Beihang University international research center for nuclei and particles in the cosmos Beihang University

Relativistic corrections to the reaction kinematic parameters were made for elastic scattering of ^6Li, ^12C and ^40Ar from ^40Ca,^90Zr and ^208Pb targets at incident energies between 20 and 100 MeV/nucleon. The results of optical model calculations show that the efects of such corrections are important when describing the angular distributions of elastic scattering cross sections for heavy ion scattering at incident energies as low as around 40 MeV/nucleon. The efects on the total reaction cross sections on the other hand, were found to be small within the energy range studied when the optical model potential is fixed.

关键词： heavy ion elastic scattering optical model relativistic kinematics

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A method of estimating and subtracting the hydrogen background in the natural carbon target used in the ^(12)C + ^(12)C experiment

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nuclear Science and Techniques 2014年第5期25卷 63-67页

作者：屈卫卫张高龙 Satoru Terashima Isao Tanihata 郭晨雷乐小云 school of physics and nuclear energy engineering Beihang University international research center for nuclei and particles in the cosmos Beihang University research center for nuclear physics Osaka University

The experimental data of 100 A MeV12C +12C elastic scattering are checked by using two-body kinematic calculation and12 C + p elastic scattering. It is shown that the measured data are true and reliable. In the paper,the transformation between the excited energy spectra of the12 C +12C system and the ground state energy spectra of the12 C + p system is introduced. The method of subtraction of the hydrogen background in the natural carbon target used in the experiment is elaborately described and the results are discussed. It is indicated that this method of subtraction of hydrogen background is reasonable and can be used in the data analysis. Based on the elastic scattering cross section of the previous experiment of12C+p at 95.3A MeV, the hydrogen content entered into the reaction is analyzed. The final hydrogen content in the natural carbon target is(2.73 ± 0.12)%.

关键词：实验数据氢含量碳靶天然弹性散射截面估算运动学计算背景减除

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Notch Test for Radial Sensitivity on Neutron Density Distribution in ^48Ca Probed by α-Particle Elastic Scattering

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Chinese physics Letters 2014年第5期31卷 38-41页

作者：张小富庞丹阳 school of physics and nuclear energy engineering Beihang University Beijing 100191 international research center for nuclei and particles in the cosmos Beihang University Beijing 100191

Notch tests are made to study the sensitive regions in the neutron density distribution in the ground state of^48 Ca probed by the angular distributions of differential cross sections of α-particle elastic scattering at 104 MeV with optical model potentials calculated by using a systematic single-folding model. An improved notch scheme is proposed, which perturbs the neutron density distribution of the target nucleus locally. Results of the notch tests show that the angular distribution of differential cross sections for α particle elastic scattering at 104 MeV only probe the surface of the neutron density distribution in ^48Ca.

关键词： Angular distribution

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Study of hadrons using the Gaussian functional method in the O(4) linear σ model

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Chinese physics C 2015年第6期39卷 52-63页

作者：陈华星 Shotaro Imai Hiroshi Toki 耿立升 school of physics and nuclear energy engineering and international research center for nuclei and particles in the cosmos Beihang University Department of physics Kyoto University Meme Media laboratory Hokkaido University research center for nuclear physics Osaka University

We study properties of hadrons in the O（4） linear σ model, where we take into account fluctuations of mesons around their mean field values using the Gaussian functional （GF） method. In the GF method we calculate dressed σ and π masses, where we include the effect of fluctuations of mesons to find a better ground state wave function than the mean field approximation. Then we solve the Bethe-Salpeter equations and calculate physical σ and π masses. We recover the Nambu-Goldstone theorem for the physical pion mass to be zero in the chiral limit. The σ meson is a strongly correlated meson-meson state, and seems to have a two meson composite structure. We calculate σ and π masses as functions of temperature for both the chiral limit and explicit chiral symmetry breaking case. We get similar behaviors for the physical σ and π masses as the case of the mean field approximation, but the coupling constants are much larger than the values of the case of the mean field approximation.

关键词： linear a model sigma and pion Gaussian functional method Bethe-Salpeter equation Nambu Goldstone theorem finite temperature

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Recent development in SU（3） covariant baryon chiral perturbation theory

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Frontiers of physics 2013年第3期8卷 328-348页

作者： Li-Sheng Geng school of physics and nuclear energy engineering Beihang University Beijing 100191 China international research center for nuclei and particles in the cosmos Beihang University Beijing 100191 China

Baryon chiral perturbation theory （BChPT）, as an effective field theory of low-energy quantum chromodynamics （QCD）, has played and is still playing an important role in our understanding of non-perturbative strong-interaction phenomena. In the past two decades, inspired by the rapid progress in lattice QCD simulations and the new experimental campaign to study the strangeness sector of low-energy QCD, many efforts have been made to develop a fully covariant BChPT and to test its validity in all scenarios. These new endeavours have not only deepened our understanding of some long-standing problems, such as the power-counting-breaking problem and the convergence problem, but also resulted in theoretical tools that can be confidently applied to make robust predic- tions. Particularly, the manifestly covariant BChPT supplemented with the extended-on-mass-shell （EOMS） renormalization scheme has been shown to satisfy all analyticity and symmetry constraints and converge relatively faster compared to its non-relativistic and infrared counterparts. In this article, we provide a brief review of the fully covariant BChPT and its latest applications in the u, d, and s three-flavor sector.

关键词： chiral Lagrangians lattice QCD calculations baryon resonances hyperons

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Study of fusion Q-value rule in sub-barrier fusion of heavy ions

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Chinese physics C 2015年第7期39卷 19-25页

作者：刘星星张高龙张焕乔 school of physics and nuclear energy engineering Beihang University international research center for nuclei and particles in the cosmos Beihang University China Institute of Atomic energy

A vast body of fusion data has been analyzed for different projectiles and target nuclei. It is indicated that the sub-barrier fusion depends on the fusion Q-value. In terms of a recently introduced fusion Q-value rule and an energy scaling reduction procedure, the experimental fusion excitation functions are reduced and compared with each other. It is found that the reduced fusion excitations of selected fusion systems show a similar trend. The fusion data for massive nuclei are in agreement with the Q-value rule. In the fusion process, the Q contribution should be considered. Within this approach, the sub-barrier fusion cross sections of most fusion systems can be predicted without involving any structure effects of colliding nuclei. Instances of disagreement are presented in a few fusion systems. The use of the energy scaling as a criterion of possible experimental data inconsistency is discussed. More precise experimental fusion data need to be measured.

关键词： compound nuclei sub-barrier fusion new energy scaling

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