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
A new Goldstone particle named Majoron is introduced in order to explain the origin of neutrino mass via some new physics models assuming that neutrinos are Majorana particles.By expanding the signal region and using ...A new Goldstone particle named Majoron is introduced in order to explain the origin of neutrino mass via some new physics models assuming that neutrinos are Majorana particles.By expanding the signal region and using likelihood analysis,it becomes possible to search for Majoron using experiments originally designed to search forμ-e conversion.For the COMET experiment,the sensitivity of processμ→eJ is able to reach B(μ→eJ)=2.3×10-5in Phase-I and O(10-8)in Phase-II.Meanwhile,the sensitivities to search for Majoron in future experiments are also discussed in this article.展开更多
目的探讨麻醉意识深度指数(cerebral state index,CSI)变化在老年男性前列腺电切手术中监测麻醉深度的应用价值。方法选取2016年1月至2017年3月在四川省南充市中心医院全麻下行前列腺电切手术老年患者120例,年龄65~85岁,美国麻醉医师协...目的探讨麻醉意识深度指数(cerebral state index,CSI)变化在老年男性前列腺电切手术中监测麻醉深度的应用价值。方法选取2016年1月至2017年3月在四川省南充市中心医院全麻下行前列腺电切手术老年患者120例,年龄65~85岁,美国麻醉医师协会分级标准(American society of anesthesiologists,ASA)Ⅰ~Ⅲ级。静脉诱导,插入SLIPATM喉罩,术中予以间歇正压通气(intermittent positive pressure ventilation,IPPV),吸入七氟醚,间断推注顺阿曲库铵维持肌松,靶控输注(target controlled infusion,TCI)模式静脉泵注瑞芬太尼。采用随机数字表法,分为CSI组和对照组,每组各60例。记录患者年龄、体质量、文化水平、ASA分级、手术时间、顺阿曲库铵和瑞芬太尼用量,以及麻醉诱导前(T0)、诱导后(T1)、插入喉罩后即刻(T2)和苏醒时(T3)的平均动脉压(mean arterial pressure,MAP)、心率(heart rate,HR)和CSI值。记录麻醉苏醒时间(停用七氟烷至能听从指令睁眼时)和拔除喉罩时间(停用七氟烷至拔除喉罩时)。应用简易精神状态量表(mini-mental state examination,MMSE)分别于麻醉前和拔除喉罩后1、6、24、48h评价患者认知功能。结果在麻醉维持期,CSI组患者血流动力学更平稳,差异有统计学意义(P<0.05);CSI组与对照组比较,在睁眼时间和拔除喉罩时间上均明显缩短,差异有统计学意义(P<0.05);MMSE评分与对照组比较,CSI组在麻醉前及拔除喉罩后48h评分,差异无统计学意义(P>0.05),而在拔除喉罩后1、6、24h评分均明显增高,差异有统计学意义(P<0.05)。结论在老年男性前列腺电切手术中,通过CSI为麻醉深度监测提供量化指标,能较为满意地维持患者血流动力学平稳,降低老年患者术后出现认知功能障碍(postoperative cognitive dysfunction,POCD)的概率,增加老年患者麻醉的安全性。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Supported by the National Natural Science Foundation of China(NSFC)(11335009)International Partnership Program of Chinese Academy of Sciences(113111KYSB20190035)。
文摘A new Goldstone particle named Majoron is introduced in order to explain the origin of neutrino mass via some new physics models assuming that neutrinos are Majorana particles.By expanding the signal region and using likelihood analysis,it becomes possible to search for Majoron using experiments originally designed to search forμ-e conversion.For the COMET experiment,the sensitivity of processμ→eJ is able to reach B(μ→eJ)=2.3×10-5in Phase-I and O(10-8)in Phase-II.Meanwhile,the sensitivities to search for Majoron in future experiments are also discussed in this article.
文摘目的探讨麻醉意识深度指数(cerebral state index,CSI)变化在老年男性前列腺电切手术中监测麻醉深度的应用价值。方法选取2016年1月至2017年3月在四川省南充市中心医院全麻下行前列腺电切手术老年患者120例,年龄65~85岁,美国麻醉医师协会分级标准(American society of anesthesiologists,ASA)Ⅰ~Ⅲ级。静脉诱导,插入SLIPATM喉罩,术中予以间歇正压通气(intermittent positive pressure ventilation,IPPV),吸入七氟醚,间断推注顺阿曲库铵维持肌松,靶控输注(target controlled infusion,TCI)模式静脉泵注瑞芬太尼。采用随机数字表法,分为CSI组和对照组,每组各60例。记录患者年龄、体质量、文化水平、ASA分级、手术时间、顺阿曲库铵和瑞芬太尼用量,以及麻醉诱导前(T0)、诱导后(T1)、插入喉罩后即刻(T2)和苏醒时(T3)的平均动脉压(mean arterial pressure,MAP)、心率(heart rate,HR)和CSI值。记录麻醉苏醒时间(停用七氟烷至能听从指令睁眼时)和拔除喉罩时间(停用七氟烷至拔除喉罩时)。应用简易精神状态量表(mini-mental state examination,MMSE)分别于麻醉前和拔除喉罩后1、6、24、48h评价患者认知功能。结果在麻醉维持期,CSI组患者血流动力学更平稳,差异有统计学意义(P<0.05);CSI组与对照组比较,在睁眼时间和拔除喉罩时间上均明显缩短,差异有统计学意义(P<0.05);MMSE评分与对照组比较,CSI组在麻醉前及拔除喉罩后48h评分,差异无统计学意义(P>0.05),而在拔除喉罩后1、6、24h评分均明显增高,差异有统计学意义(P<0.05)。结论在老年男性前列腺电切手术中,通过CSI为麻醉深度监测提供量化指标,能较为满意地维持患者血流动力学平稳,降低老年患者术后出现认知功能障碍(postoperative cognitive dysfunction,POCD)的概率,增加老年患者麻醉的安全性。
