Nuclear and Particle Physics Proceedings最新文献

{"title":"Top-quark decay at next-to-next-to-next-to-leading order in QCD","authors":"Long Chen","doi":"10.1016/j.nuclphysbps.2024.05.010","DOIUrl":"10.1016/j.nuclphysbps.2024.05.010","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"345 ","pages":"Page 32"},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141731898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ξc−Ξc′ mixing from lattice QCD","authors":"","doi":"10.1016/j.nuclphysbps.2024.05.015","DOIUrl":"10.1016/j.nuclphysbps.2024.05.015","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"345 ","pages":"Page 43"},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141400095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a muon linac for the J-PARC Muon g − 2/EDM experiment","authors":"Y. Takeuchi","doi":"10.1016/j.nuclphysbps.2024.03.003","DOIUrl":"10.1016/j.nuclphysbps.2024.03.003","url":null,"abstract":"<div><p>At Japan Proton Accelerator Research Complex (J-PARC), a muon linac is being developed for future muon <span><math><mi>g</mi><mo>−</mo><mn>2</mn></math></span>/Electric Dipole Moment (EDM) experiments. The muon linac starts with an ultra-slow muon (USM) source that generates muons with an extremely small momentum of 3 keV/c (kinetic energy W=25 meV) by laser ionization of thermal muonium. The generated USMs are accelerated to 5.6 keV by an electrostatic field and injected into a radio frequency quadrupole (RFQ). The injected muons are accelerated to 0.34 MeV by the 324-MHz RFQ. Then, the energy of the muon beam is boosted to 4.5 MeV with a 324-MHz interdigital H-type drift tube linac (IH-DTL). Following the IH-DTL, 1296-MHz disk-and-washer (DAW) structures accelerate the muon up to 40 MeV. Finally, the muons are accelerated from 40 MeV to 212 MeV using a 2592-MHz disk-loaded traveling wave structure (DLS). In this paper, details of the linac design and the recent progress toward the realization of the world's first muon linac will be discussed.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"345 ","pages":"Pages 10-15"},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141411938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Imaging technology based on the interaction between muon and material","authors":"Si-Yuan Luo,&nbsp;Wan-Cheng Xiao,&nbsp;Lie He,&nbsp;Hai-Feng Zhang,&nbsp;Xiao-Dong Wang","doi":"10.1016/j.nuclphysbps.2024.03.002","DOIUrl":"10.1016/j.nuclphysbps.2024.03.002","url":null,"abstract":"<div><p>Muon imaging technology, as an emerging detection method, is widely used in various fields. Muons can be classified into cosmic ray muons and accelerator muons based on their origins. Cosmic ray muons stand out for wide energy range, strong penetrating power and no artificial radiation. These characteristics make cosmic ray muon imaging technology adept at achieving nondestructive imaging of target objects. Presently, the commonly used imaging methods include scattering and transmission imaging technologies that leverage muon information for imaging. Additionally, muon and muonic secondary particle coincidence imaging technology utilizes information from secondary particles generated during the interaction between muons and target objects for imaging. The accelerator muon, distinguished by its high flux, strong monochromaticity, and adjustable energy, enables rapid and multidimensional imaging of target objects at various depths. Furthermore, it facilitates the analysis of material elements through muonic X-rays. This article provides insights into the production process and physical characteristics of muons, the fundamental principles of muon imaging technology, and its diverse applications across disciplines. It also explores the current development status and emerging trends in fields such as mineral resource exploration, archaeological studies, and nuclear safety.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 31-38"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on radionuclides in soil samples of of Tiruvannamalai District Tamilnadu, India using Gamma Ray Spectrometry","authors":"Y. Raghu ,&nbsp;Subashini. J ,&nbsp;N. Harikrishnan ,&nbsp;N. Jairaj ,&nbsp;S. Manimegalai","doi":"10.1016/j.nuclphysbps.2024.02.003","DOIUrl":"https://doi.org/10.1016/j.nuclphysbps.2024.02.003","url":null,"abstract":"<div><p>The activity concentrations of natural radionuclides ^226Ra, ²³²Th, and ⁴⁰K in soil samples from Tiruvannamalai district, Tamil Nadu, have been estimated using NaI (TI) detector-based gamma spectrometry. The mean activity concentration of ²³²Th in soil samples is greater and poorer for ²²⁶Ra and ⁴⁰K, respectively, when compared with world average values. Radiation hazard estimation was done by the assessment of radiological parameters such as radium equivalent activity (Ra_eq), absorbed gamma dose rate (D_R), annual effective dose rate (H_R), and excess lifetime cancer risk (ELCR). These parameters were compared with international criteria. The findings in the soil showed that there is no major radiological risk to the general public by using these soil samples from the Tiruvannamalai district.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 19-21"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141294140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of μSR apparatuses for a pulsed muon source at China Spallation Neutron Source","authors":"Z.W. Pan ,&nbsp;T.Y. Yang ,&nbsp;Z.B. Lin ,&nbsp;Z. Wang ,&nbsp;Z.Y. He ,&nbsp;Y. Yuan ,&nbsp;X.J. Ni ,&nbsp;J.D. Liu ,&nbsp;H. Liang ,&nbsp;B.J. Ye ,&nbsp;Q. Li ,&nbsp;Y. Bao ,&nbsp;Y. Li ,&nbsp;H. Cheng ,&nbsp;H.T. Hu ,&nbsp;Y.J. Yu ,&nbsp;J.Y. Tang ,&nbsp;F. Xie ,&nbsp;S.P. Cottrell ,&nbsp;D.E. Pooley","doi":"10.1016/j.nuclphysbps.2023.12.002","DOIUrl":"10.1016/j.nuclphysbps.2023.12.002","url":null,"abstract":"<div><p>Muon spin rotation/relaxation/resonance (<em>μ</em><span><span>SR) spectroscopy uses highly polarized muons to study the microscopic magnetic structure and dynamics of </span>condensed matter<span>. In addition to the five existing muon facilities, the first Chinese muon source, the Muon station for sciEnce technoLOgy and inDustrY (MELODY), is planned to be constructed in Phase II of the China Spallation<span> Neutron Source (CSNS). It aims to provide intense and pulsed muon beams to conduct </span></span></span><em>μ</em><span>SR applications in multiple disciplines. The group from the University of Science and Technology of China (USTC) participated in the collaboration with the CSNS accelerator group for the construction of the muon source. The USTC group led the research and development (R&amp;D) of the first-generation photomultiplier tube (PMT)-based </span><em>μ</em><span>SR spectrometer, and the design of the second-generation silicon photomultiplier (SiPM)-based spectrometer. The PMT-based spectrometer is a 128-channel prototype to demonstrate and develop key detector and electronics technologies for the planned MELODY. After several iterative designs and updates of detectors and electronics, the spectrometer prototype achieved a 7-ns dead time, which can record more than 12 positrons per channel per pulse according to the ISIS running experience. Based on the technologies developed from the first-generation spectrometer, the second-generation spectrometer will use SiPMs to accommodate over 2500 detector units to make better use of muons in MELODY. The two generation developments of Chinese </span><em>μ</em>SR spectrometers will greatly advance the construction of MELODY, and provide high-quality data for users to interpret material properties in the near future.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 8-13"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139393674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Renormalization group improvement and QCD sum rules","authors":"M.S.A. Alam Khan","doi":"10.1016/j.nuclphysbps.2023.11.004","DOIUrl":"10.1016/j.nuclphysbps.2023.11.004","url":null,"abstract":"<div><p>We summarize the results obtained for the quark masses (u,d,s,c, and b) in Refs. <span>[1]</span>, <span>[2]</span> and strong coupling (<span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span><span>) using renormalization group (RG) improvement of the theoretical expressions and experimental inputs that enter in the QCD sum rules. We obtain </span><span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>u</mi></mrow></msub><mo>(</mo><mn>2</mn><mspace></mspace><mrow><mi>GeV</mi></mrow><mo>)</mo><mo>=</mo><msubsup><mrow><mn>2.00</mn></mrow><mrow><mo>−</mo><mn>0.40</mn></mrow><mrow><mo>+</mo><mn>0.33</mn></mrow></msubsup><mspace></mspace><mspace></mspace><mrow><mi>MeV</mi></mrow></math></span>, <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>(</mo><mn>2</mn><mspace></mspace><mrow><mi>GeV</mi></mrow><mo>)</mo><mo>=</mo><msubsup><mrow><mn>4.21</mn></mrow><mrow><mo>−</mo><mn>0.45</mn></mrow><mrow><mo>+</mo><mn>0.48</mn></mrow></msubsup><mspace></mspace><mspace></mspace><mrow><mi>MeV</mi></mrow></math></span>, and <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>(</mo><mn>2</mn><mspace></mspace><mrow><mi>GeV</mi></mrow><mo>)</mo><mo>=</mo><msubsup><mrow><mn>104.34</mn></mrow><mrow><mo>−</mo><mn>4.24</mn></mrow><mrow><mo>+</mo><mn>4.32</mn></mrow></msubsup><mspace></mspace><mspace></mspace><mrow><mi>MeV</mi></mrow></math></span> using Borel Laplace sum rules for the divergence of the axial vector currents. The relativistic sum rules for the moments of the heavy quark currents lead to the determination of <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>(</mo><msub><mrow><mi>M</mi></mrow><mrow><mi>Z</mi></mrow></msub><mo>)</mo><mo>=</mo><mn>0.1171</mn><mo>(</mo><mn>7</mn><mo>)</mo></math></span>, <span><math><msub><mrow><mover><mrow><mi>m</mi></mrow><mo>‾</mo></mover></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>1281.1</mn><mo>(</mo><mn>3.8</mn><mo>)</mo><mspace></mspace><mrow><mi>MeV</mi></mrow></math></span> and <span><math><msub><mrow><mover><mrow><mi>m</mi></mrow><mo>‾</mo></mover></mrow><mrow><mi>b</mi></mrow></msub><mo>=</mo><mn>4174.3</mn><mo>(</mo><mn>9.5</mn><mo>)</mo><mspace></mspace><mrow><mi>MeV</mi></mrow></math></span>.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 1-7"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radon metrology at NARL, Gadanki","authors":"Charan Kumar Kachintaya,&nbsp;Kamsali Nagaraja","doi":"10.1016/j.nuclphysbps.2024.02.004","DOIUrl":"10.1016/j.nuclphysbps.2024.02.004","url":null,"abstract":"<div><p>It is unavoidable to be exposed to radon and its progeny, and numerous researchers in India have conducted substantial research to understand any potential health implications. It's interesting to observe that the time scale of several atmospheric processes and the half-life of radon, which is 3.82 days, are comparable. As a result, the Radon measurements can be used to understand various research problems in the area of atmospheric physics. The assessment of three years' data of radon activity concentration, as well as its daughter, ambient gamma dose, and climate data, was carried out at the National Atmospheric Research Laboratory, Gadanki, India (13.46° N, 79.17° E). It is possible to observe the breakdown of periodicity, a strong daily and seasonal trend, and the relationship between the measured and dependent variables while looking at a time series in general. Radon activity was shown to exhibit a clearly defined diurnal pattern, and FFT analysis revealed the Radon time series' latent memory of sub-diurnal fluctuations. Radon and its progeny were found to have mean levels of 12.2 ± 2.1 Bq/m³ and 4.2 ± 2.3 mWL, respectively. At NARL, the ambient gamma radiation dose rate was 186 ± 9.3 nSv/hour, which is within UNSCEAR's allowed limits.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 22-26"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a polarization monitor for the J-PARC muon g − 2/EDM experiment","authors":"Meng Lyu ,&nbsp;Xintong Cai ,&nbsp;Fangyuan Yu ,&nbsp;Siyuan Chen ,&nbsp;Kim Siang Khaw","doi":"10.1016/j.nuclphysbps.2024.02.002","DOIUrl":"10.1016/j.nuclphysbps.2024.02.002","url":null,"abstract":"<div><p>In the J-PARC Muon <span><math><mi>g</mi><mo>−</mo><mn>2</mn></math></span>/EDM experiment, the Polarization Monitor plays a crucial role in assessing the quality of muon beams by measuring the spin polarization of muons in the muonium production chamber. This is achieved through analyzing the asymmetry in muon decay, which serves as an indicator of beam quality. The development of this detector system is segmented into three distinct phases. The initial two phases have undergone validation using atmospheric muons. A significant aspect of Phase 1 is the simulation study, which, when integrated with energy deposition calibration derived from experimental data, effectively minimizes background noise caused by muon decays within the scintillator. Furthermore, the construction of the Phase 1 apparatus has been completed, and preliminary data collection has revealed a notable difference in asymmetry between polarized and unpolarized muons. This finding is instrumental in advancing the development of Phases 2 and 3 of the detector system.</p></div>","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Pages 14-18"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to Development of a semi empirical calculation approach for the determination of percentage depth dose in water for higher energy photon beams using a medical linear accelerator [Nuclear and Particle Physics Proceedings (2023) 88-90/15483]","authors":"Elizebeth Joseph ,&nbsp;P. Sowmya ,&nbsp;Avin Kumar ,&nbsp;Sruthi Sreenivasan","doi":"10.1016/j.nuclphysbps.2024.04.002","DOIUrl":"10.1016/j.nuclphysbps.2024.04.002","url":null,"abstract":"","PeriodicalId":37968,"journal":{"name":"Nuclear and Particle Physics Proceedings","volume":"344 ","pages":"Page 39"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405601424000592/pdfft?md5=32cff3b643c11d542532741f4d0d5c37&pid=1-s2.0-S2405601424000592-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141023735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}