The Jiangmen Underground Neutrino Observatory(JUNO)is a large liquid scintillator detector designed to explore many topics in fundamental physics.In this study,the potential of searching for proton decay in the p→νK...The Jiangmen Underground Neutrino Observatory(JUNO)is a large liquid scintillator detector designed to explore many topics in fundamental physics.In this study,the potential of searching for proton decay in the p→νK^(+)mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification.Moreover,the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals.Based on these advantages,the detection efficiency for the proton decay via p→νK^(+)is 36.9%±4.9%with a background level of 0.2±0.05(syst)±0.2(stat)events after 10 years of data collection.The estimated sensitivity based on 200 kton-years of exposure is 9.6×1033 years,which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies.展开更多
前期研究表明,施入园林废弃物作为饵料并投放蚯蚓能够降低滨海盐土盐分。通过田间对比试验,研究同时添加磷石膏和红糖对蚯蚓改良滨海盐土的促进作用。结果表明,在每平方米施入6.5 kg园林废弃物及50条蚯蚓(平均质量0.334 g)的基础上,添...前期研究表明,施入园林废弃物作为饵料并投放蚯蚓能够降低滨海盐土盐分。通过田间对比试验,研究同时添加磷石膏和红糖对蚯蚓改良滨海盐土的促进作用。结果表明,在每平方米施入6.5 kg园林废弃物及50条蚯蚓(平均质量0.334 g)的基础上,添加磷石膏能够显著降低土壤pH以及水溶性钠离子(Na^+)和氯离子(Cl^-)的含量,但同时会显著增加土壤水溶性钙离子(Ca^(2+))及硫酸根离子(SO_4^(2-))含量;随着磷石膏施入量的提高,土壤全盐量呈现先降低后升高的趋势。添加红糖能够间接降低盐碱土壤水溶性Na^+和Cl^-的含量以及全盐量,但不同红糖施入量的处理间并无显著差异。根据试验结果,推荐在施入园林废弃物作为饵料并投放蚯蚓的基础上,同时添加1 kg m^(-2)的磷石膏及0.4 kg m^(-2)的红糖,以取得最佳的降盐效果。展开更多
基金supported by the Chinese Academy of Sciencesthe National Key R&D Program of China+22 种基金the CAS Center for Excellence in Particle PhysicsWuyi Universitythe Tsung-Dao Lee Institute of Shanghai Jiao Tong University in Chinathe Institut National de Physique Nucléaire et de Physique de Particules (IN2P3) in Francethe Istituto Nazionale di Fisica Nucleare (INFN) in Italythe Italian-Chinese collaborative research program MAECI-NSFCthe Fond de la Recherche Scientifique (F.R.S-FNRS)FWO under the "Excellence of Science-EOS" in Belgiumthe Conselho Nacional de Desenvolvimento Científico e Tecnològico in Brazilthe Agencia Nacional de Investigacion y Desarrollo in Chilethe Charles University Research Centrethe Ministry of Education,Youth,and Sports in Czech Republicthe Deutsche Forschungsgemeinschaft (DFG)the Helmholtz Associationthe Cluster of Excellence PRISMA+ in Germanythe Joint Institute of Nuclear Research (JINR)Lomonosov Moscow State University in Russiathe joint Russian Science Foundation (RSF)National Natural Science Foundation of China (NSFC) research programthe MOST and MOE in Taiwan,Chinathe Chulalongkorn UniversitySuranaree University of Technology in Thailandthe University of California at Irvine in USA
文摘The Jiangmen Underground Neutrino Observatory(JUNO)is a large liquid scintillator detector designed to explore many topics in fundamental physics.In this study,the potential of searching for proton decay in the p→νK^(+)mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification.Moreover,the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals.Based on these advantages,the detection efficiency for the proton decay via p→νK^(+)is 36.9%±4.9%with a background level of 0.2±0.05(syst)±0.2(stat)events after 10 years of data collection.The estimated sensitivity based on 200 kton-years of exposure is 9.6×1033 years,which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies.
基金partly supported by the National Natural Science Foundation of China(NSFC,12035007 and 12147128)Guangdong Provincial funding(2019QN01X172)+2 种基金Guangdong Major Project of Basic and Applied Basic Research(2020B0301030008)Q.W.is also supported by the NSFC(12070131001)the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)through the funds provided to the Sino-German Collaborative Research Center TRR110“Symmetries and the Emergence of Structure in QCD”(DFG Project-ID 196253076-TRR 110)。
基金partly supported by the National Natural Science Foundation of China(NSFC,12035007)Guangdong Provincial funding(2019QN01X172)+4 种基金Guangdong Major Project of Basic and Applied Basic Research(2020B0301030008)supported by the NSFC(12070131001)the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation,Project-ID 196253076-TRR110)through the funds provided to the Sino-German Collaborative Research Center TRR110"Symmetries and the Emergence of Structure in QCD"supported by the Chinese Academy of Sciences(CAS)President’s International Fellowship Initiative(PIFI)(2018DM0034)Volkswagen Stiftung(93562)。
文摘前期研究表明,施入园林废弃物作为饵料并投放蚯蚓能够降低滨海盐土盐分。通过田间对比试验,研究同时添加磷石膏和红糖对蚯蚓改良滨海盐土的促进作用。结果表明,在每平方米施入6.5 kg园林废弃物及50条蚯蚓(平均质量0.334 g)的基础上,添加磷石膏能够显著降低土壤pH以及水溶性钠离子(Na^+)和氯离子(Cl^-)的含量,但同时会显著增加土壤水溶性钙离子(Ca^(2+))及硫酸根离子(SO_4^(2-))含量;随着磷石膏施入量的提高,土壤全盐量呈现先降低后升高的趋势。添加红糖能够间接降低盐碱土壤水溶性Na^+和Cl^-的含量以及全盐量,但不同红糖施入量的处理间并无显著差异。根据试验结果,推荐在施入园林废弃物作为饵料并投放蚯蚓的基础上,同时添加1 kg m^(-2)的磷石膏及0.4 kg m^(-2)的红糖,以取得最佳的降盐效果。
