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Relativistic Heavy Ion Collider and the Large Hadron Collider for Heavy Ion Fusion
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作者 Ardeshir Irani 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第2期825-827,共3页
Heavy Ion Fusion makes use of the Relativistic Heavy Ion Collider at Brookhaven National Lab and the Large Hadron Collider in Geneva, Switzerland for Inertial Confinement Fusion. Two Storage Rings, which may or may no... Heavy Ion Fusion makes use of the Relativistic Heavy Ion Collider at Brookhaven National Lab and the Large Hadron Collider in Geneva, Switzerland for Inertial Confinement Fusion. Two Storage Rings, which may or may not initially be needed, added to each of the Colliders increases the intensity of the Heavy Ion Beams making it comparable to the Total Energy delivered to the DT target by the National Ignition Facility at the Lawrence Livermore Lab. The basic Physics involved gives Heavy Ion Fusion an advantage over Laser Fusion because heavy ions have greater penetration power than photons. The Relativistic Heavy Ion Collider can be used as a Prototype Heavy Ion Fusion Reactor for the Large Hadron Collider. 展开更多
关键词 Heavy Ion Fusion Relativistic Heavy Ion collider Large Hadron collider Inertial Confinement Fusion National Ignition Facility
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Lambda polarization at the Electron-ion collider in China 被引量:1
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作者 Zhaohuizi Ji Xiao-Yan Zhao +2 位作者 Ai-Qiang Guo Qing-Hua Xu Jin-Long Zhang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第10期117-125,共9页
Lambda polarization can be measured through its self-analyzing weak decay, making it an ideal candidate for studying spin effects in high-energy scattering. In lepton-nucleon deep inelastic scattering(DIS), Lambda pol... Lambda polarization can be measured through its self-analyzing weak decay, making it an ideal candidate for studying spin effects in high-energy scattering. In lepton-nucleon deep inelastic scattering(DIS), Lambda polarization measurements can probe polarized parton distribution functions(PDFs) and polarized fragmentation functions(FFs). One of the most promising facilities for high-energy nuclear physics research is the proposed Electron-ion collider in China(EicC). As a next-generation facility, EicC is set to advance our understanding of nuclear physics to new heights. In this article, we study the Lambda production in electron-proton collisions at the EicC energy, in particular the reconstruction of Lambda based on the performance of the designed EicC detector. In addition, taking spontaneous transverse polarization as an example, we provide a theoretical prediction with a statistical projection based on one month of EicC data, offering valuable insights into future research prospects. 展开更多
关键词 Electron-ion collider in China Lambda polarization Polarizing fragmentation functions Nucleon structure
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ILC3/IL-22在细菌性肺炎中的抗菌免疫研究进展
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作者 戴德嘉 李涵 +5 位作者 黄璟昇 朱树馨 康伟超 何家康 梁正敏 彭建波 《中国兽医杂志》 CAS 北大核心 2024年第9期102-109,共8页
Ⅲ型固有淋巴细胞(ILC3)是一种新型淋巴细胞,激活后通过产生白细胞介素-22(IL-22)和白细胞介素-17(IL-17)发挥抗菌和修复黏膜损伤的作用,本综述主要探讨ILC3/IL-22在细菌性肺炎中介导抗菌免疫的作用和机制,以期为细菌性肺炎的防控提供... Ⅲ型固有淋巴细胞(ILC3)是一种新型淋巴细胞,激活后通过产生白细胞介素-22(IL-22)和白细胞介素-17(IL-17)发挥抗菌和修复黏膜损伤的作用,本综述主要探讨ILC3/IL-22在细菌性肺炎中介导抗菌免疫的作用和机制,以期为细菌性肺炎的防控提供理论依据和研究思路。 展开更多
关键词 Ⅲ型固有淋巴细胞(ilc3) 白细胞介素-22(IL-22) 细菌性肺炎 抗菌免疫
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CD226在小鼠小肠3型固有淋巴样细胞(ILC3)中的表达
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作者 羊璐 马菁昌 +4 位作者 刘懿天 王婷婷 王玉玲 庄然 张正祥 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2024年第1期1-6,共6页
目的 观察CD226在小肠3型固有淋巴样细胞(ILC3)上的表达情况。方法 采用生物信息学方法分析小鼠CD226在ILC中的表达。分离正常C57BL/6J小鼠小肠黏膜固有层淋巴细胞(LPL),流式细胞术检测CD226在ILC1和ILC3上的表达。构建葡聚糖硫酸钠(DSS... 目的 观察CD226在小肠3型固有淋巴样细胞(ILC3)上的表达情况。方法 采用生物信息学方法分析小鼠CD226在ILC中的表达。分离正常C57BL/6J小鼠小肠黏膜固有层淋巴细胞(LPL),流式细胞术检测CD226在ILC1和ILC3上的表达。构建葡聚糖硫酸钠(DSS)诱导小鼠肠炎模型,观察CD226在ILC3上表达的变化情况。结果 小鼠小肠ILC1和ILC3均表达CD226;肠炎模型中ILC3所占比例降低,但CD226在ILC3上的表达水平升高。结论 小鼠小肠表达CD226,DSS诱导的肠炎模型中虽然ILC3比例降低,但CD226在ILC3的表达增加。 展开更多
关键词 3型固有淋巴样细胞(ilc3) CD226 黏膜免疫 肠道
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咳喘停袋泡颗粒抑制IL-33/ILC2s和致病性T细胞干预过敏性气道炎症的作用机制
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作者 邹楠婷 吴招 +6 位作者 闫晓东 张春菲 张浩洪 莫庆艳 巨鸣谦 徐金柱 万春平 《中国药理学通报》 CAS CSCD 北大核心 2024年第7期1350-1357,共8页
目的研究咳喘停袋泡颗粒(Kechuanting,KCT)抑制IL-33/ILC2s和致病性T细胞干预过敏性气道炎症的作用机制。方法网络药理学分析KCT干预哮喘的潜在靶点和机制。以OVA诱导过敏性哮喘模型小鼠。组织病理染色观察肺损伤变化;ELISA和荧光定量PC... 目的研究咳喘停袋泡颗粒(Kechuanting,KCT)抑制IL-33/ILC2s和致病性T细胞干预过敏性气道炎症的作用机制。方法网络药理学分析KCT干预哮喘的潜在靶点和机制。以OVA诱导过敏性哮喘模型小鼠。组织病理染色观察肺损伤变化;ELISA和荧光定量PCR分别检测Th2型哮喘中关键炎症因子及其mRNA表达水平;Western blot检测MAPK通路中相关蛋白磷酸化水平;流式细胞术检测ILC2s、Th1、Th17、Th2和Treg细胞的比例。结果网络药理学鉴定出KCT治疗哮喘的227个主要活性成分和143个共同靶点,主要富集到MAPK和IL-17等信号通路。进一步验证实验显示,KCT干预明显减轻了哮喘小鼠肺部炎症损伤程度,减少B细胞数量及IL-4、TNF-α、TGF-β的产生,下调肺组织中JNK磷酸化水平以及Il-33、Bcl11b、Rorα、Tcf-7、Jun、MAPK3、MAPK14 mRNA表达。KCT干预减少了哮喘小鼠肺和脾中ILC2s和Th17数量,抑制肺中Th2细胞浸润。结论KCT对过敏性哮喘气道炎症有较好的治疗作用,其机制与抑制IL-33/ILC2s通路、致病性T细胞亚群和JNK-MAPK信号通路相关。 展开更多
关键词 咳喘停袋泡颗粒 过敏性哮喘 气道炎症 ilc2s TH2细胞 CD4^(+)T细胞
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ILC2在2型炎症型哮喘中的作用
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作者 赵童 徐成灵 +2 位作者 李高斌 任煜 陈静 《中国医学创新》 CAS 2024年第9期163-168,共6页
哮喘是一种异质性疾病,2型炎症型哮喘是其最重要的一个表型。2型固有淋巴细胞(group2 innate lymphoid cells,ILC2)是一种极为重要的固有免疫细胞,近年来ILC2在2型炎症型哮喘中发挥的作用逐渐被人们认识到。ILC2可以被各种介质调控,促... 哮喘是一种异质性疾病,2型炎症型哮喘是其最重要的一个表型。2型固有淋巴细胞(group2 innate lymphoid cells,ILC2)是一种极为重要的固有免疫细胞,近年来ILC2在2型炎症型哮喘中发挥的作用逐渐被人们认识到。ILC2可以被各种介质调控,促进或者抑制哮喘。本文根据ILC2的功能和信号转导途径,主要介绍了ILC2的特性、共刺激分子、激素、神经调节与2型炎症型哮喘的关系,并且近年来研究发现ILC2也会出现免疫记忆,这对以往的免疫反应的分类是一个挑战与思考,但还需进一步验证,这也可能是以后哮喘的药物研发的新方向。 展开更多
关键词 ilc2 哮喘 发病机制
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慢性阻塞性肺病肠道和肺炎性2型固有淋巴样细胞(iILC2)及相关细胞因子含量分析
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作者 徐倩 谭希 +1 位作者 胡婷婷 姜敏 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2023年第7期599-603,共5页
目的 探讨慢阻塞性肺病(COPD)肠道炎性2型固有淋巴细胞(iILC2)与肺部ILC2及其相关炎症反应的关系。方法采用熏烟法建立COPD小鼠模型,将小鼠随机分为正常组和COPD组。采用HE染色检测小鼠肺、肠组织的病变情况,流式细胞术检测天然ILC2细胞... 目的 探讨慢阻塞性肺病(COPD)肠道炎性2型固有淋巴细胞(iILC2)与肺部ILC2及其相关炎症反应的关系。方法采用熏烟法建立COPD小鼠模型,将小鼠随机分为正常组和COPD组。采用HE染色检测小鼠肺、肠组织的病变情况,流式细胞术检测天然ILC2细胞(nILC2)和iILC2细胞数量。使用Wright-Giemsa染色检测正常组和COPD组小鼠支气管肺泡灌洗液(BALF)中免疫细胞数量,ELISA检测BALF中白细胞介素13(IL-13)和IL-4的含量。结果 COPD小鼠肺、肠组织上皮细胞增生,部分萎缩或缺失,伴随炎细胞浸润,病理评分增加,BALF中中性粒细胞、单核细胞、淋巴细胞显著增加。COPD小鼠肺组织iILC2数量、肠组织nILC2和iILC2数量显著增加,BALF中IL-13和IL-4含量显著升高。结论 COPD肺部iILC2及其相关细胞因子的增加可能与肠道iILC2细胞相关。 展开更多
关键词 2型固有淋巴细胞(ilc2) 炎性ilc2细胞(iilc2) 天然ilc2细胞(nilc2) 慢性阻塞性肺病(COPD)
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2型固有淋巴细胞(ILC2)在过敏性呼吸道疾病中的作用研究进展 被引量:3
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作者 罗超 刘绍波 +1 位作者 任全伟 彭顺林 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2023年第6期552-557,共6页
2型固有淋巴细胞(ILC2)作为2型辅助T(Th2)细胞的“镜像细胞”,其总细胞数量虽远不如机体内的CD4^(+)Th2细胞数量庞大,但活化后的ILC2具有比CD4^(+)Th2细胞更强大的生物学活性,能迅速增强Th2细胞炎性反应,在呼吸道过敏性疾病的发病机制... 2型固有淋巴细胞(ILC2)作为2型辅助T(Th2)细胞的“镜像细胞”,其总细胞数量虽远不如机体内的CD4^(+)Th2细胞数量庞大,但活化后的ILC2具有比CD4^(+)Th2细胞更强大的生物学活性,能迅速增强Th2细胞炎性反应,在呼吸道过敏性疾病的发病机制中有着重要作用。激活ILC2的相关递质包括炎性细胞因子:白细胞介素33(IL-33)、IL-25、胸腺基质淋巴细胞生成素(TSLP)、IL-4、IL-9;脂质递质(前列腺素、白三烯)、其他激活递质:诱导性共刺激分子(ICOS)、补体C3a、神经肽受体、血管活性肠肽及降钙素基因相关肽等,活化的ILC2产生大量的IL-4、IL-5、IL-9、IL-13及双调蛋白等炎性递质,诱发气道高反应、黏液分泌和气道重塑等呼吸道过敏反应。因此,通过靶向上游及下游信号抑制ILC2活化可能是治疗呼吸道过敏性疾病尤其是类固醇依赖性哮喘的潜在途径。我们总结了ILC2的免疫生物学、过敏性炎症反应中ILC2的启动、ILC2与呼吸道过敏性疾病的关系、靶向ILC2的生物制剂的研究进展。 展开更多
关键词 2型固有淋巴细胞(ilc2) 哮喘 过敏性鼻炎 综述
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Single Charged Top-Pion Production at the Next Generation e^+e^- Colliders 被引量:1
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作者 WANGXue-Lei DULin-Lin XUWen-Na 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第1期133-138,共6页
The single charged top-pion production processes e~+ e~- → tbΠ_t~- and e~+e~- → W~+Π_t~- are studied in the framework of top-color-assisted technicolor (TC2) model. Ourstudies show that the cross section σ(e~+ e... The single charged top-pion production processes e~+ e~- → tbΠ_t~- and e~+e~- → W~+Π_t~- are studied in the framework of top-color-assisted technicolor (TC2) model. Ourstudies show that the cross section σ(e~+ e~- → tbΠ_t~-) Teaches the level of tens of fb andσ(e~+ e~- → W~+Π_t~-) reaches the level of a few fb. With the yearly integrated luminosity of £~ 500 fb~(-1) expected at the planned colliders, one could collect thousands of charged top-pion ofevents via the process e~+ e~- → tbΠ_t~- and hundreds of events via the process e~+ e~- →W~+Π_t~-. The flavor changing decay mode Π_t~- → bc is the best channel to detect chargedtop-pion due to the clean SM background. With a large number of events and the clean background, thecharged top-pion should be observable at the planned colliders. Therefore, our studies in thispaper can help us to search for charged top-pion, and furthermore, to test the TC2 model. 展开更多
关键词 TOP-PION top-color-asisted technicolor model linear colliders
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外周血固有淋巴样细胞(ILC)平衡失调维持免疫抑制状态促进肺腺癌发展
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作者 郭会 臧利超 +3 位作者 杨歆煜 吴玉敏 马锦洪 史伟峰 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2023年第8期729-736,共8页
目的 探讨肺腺癌患者外周血中固有淋巴样细胞(ILC)平衡失调后对下游单核巨噬细胞、辅助性T(Th)细胞平衡状态的影响,明确ILC平衡失调后对肺腺癌免疫状态以及转归的影响。方法 收集20例肺腺癌患者及正常体检者外周血,通过流式细胞术分析... 目的 探讨肺腺癌患者外周血中固有淋巴样细胞(ILC)平衡失调后对下游单核巨噬细胞、辅助性T(Th)细胞平衡状态的影响,明确ILC平衡失调后对肺腺癌免疫状态以及转归的影响。方法 收集20例肺腺癌患者及正常体检者外周血,通过流式细胞术分析外周血中ILC、单核巨噬细胞及T淋巴细胞的百分比,并采用实时荧光定量PCR检测外周血中各型免疫细胞特征性的细胞因子分泌水平。结果 与正常体检者相比,肺腺癌患者M2型单核巨噬细胞、1型固有淋巴样细胞(ILC1)与ILC2比例上调,M1型单核巨噬细胞、CD4^(+)T淋巴细胞与CD8^(+)T淋巴细胞比例下调;M1型单核巨噬细胞与ILC1相关细胞因子mRNA表达下调,而M2型单核巨噬细胞与ILC2相关细胞因子mRNA表达上调;CD4^(+)T细胞相关细胞因子T细胞表达的T盒(T-bet) mRNA表达下调;CD4^(+)T细胞相关细胞因子GATA结合蛋白3(GATA3) mRNA表达上调;CD8^(+)T细胞的程序性死亡蛋白1(PD-1)表达上调。结论 肺腺癌患者外周血中ILC平衡失调促使单核巨噬细胞与Th细胞平衡失调,三者共同维持了肺腺癌患者的免疫抑制状态,从而促进肺腺癌发展。 展开更多
关键词 肺腺癌 固有淋巴样细胞(ilc) 单核巨噬细胞 辅助性T细胞
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IL-1β、ILC2、TGF-β1调控机制与肺纤维化疾病的关系 被引量:2
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作者 杨胜男 何巍 《沈阳医学院学报》 2023年第4期405-408,422,共5页
肺纤维化属于间质性肺疾病的一种,作为呼吸系统疑难疾病之一,预后非常差,其发病机制尚未完全明确。IL-1β作为一种细胞炎性因子,可参与调节各种损伤状态下炎症反应发生和后期组织修复。ILC2可产生Th2相关细胞因子,在组织内稳态和纤维化... 肺纤维化属于间质性肺疾病的一种,作为呼吸系统疑难疾病之一,预后非常差,其发病机制尚未完全明确。IL-1β作为一种细胞炎性因子,可参与调节各种损伤状态下炎症反应发生和后期组织修复。ILC2可产生Th2相关细胞因子,在组织内稳态和纤维化中起到重要作用。TGF-β1是促纤维化因子,参与了肺纤维化的发生。近年来的研究发现,IL-1β、ILC2及TGF-β1均与肺纤维化疾病的形成过程有关。本文就近年来IL-1β、ILC2及TGF-β1调控机制的研究及其在肺纤维化疾病中的作用做一综述,为肺纤维化治疗新靶点的研发提供依据。 展开更多
关键词 IL-1Β ilc2 TGF-Β1 肺纤维化
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自身免疫性肝炎患者外周血NKp46^(+)ILC3细胞和Th17细胞变化及其临床意义探讨 被引量:1
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作者 王浩宇 周娟燕 +2 位作者 刘茹 徐菁 马少君 《实用肝脏病杂志》 CAS 2023年第1期39-42,共4页
目的研究自身免疫性肝炎(AIH)患者外周血NKp46^(+)ILC3细胞和Th17细胞百分比变化及其临床意义.方法2016年2月~2020年2月我院收治的AIH患者43例,使用流式细胞仪检测外周血NKp46^(+)3型天然淋巴样细胞(ILC3)和Th17细胞百分比,应用受试者... 目的研究自身免疫性肝炎(AIH)患者外周血NKp46^(+)ILC3细胞和Th17细胞百分比变化及其临床意义.方法2016年2月~2020年2月我院收治的AIH患者43例,使用流式细胞仪检测外周血NKp46^(+)3型天然淋巴样细胞(ILC3)和Th17细胞百分比,应用受试者工作特征曲线(ROC)下面积(AUC)分析应用NKp46^(+)ILC3细胞和Th17细胞百分比判断AIH患者肝组织炎症活动分级的效能.结果10例临床重度AIH患者NKp46^(+)ILC3细胞和Th17细胞百分比分别为(0.2±0.2)%和(1.3±0.4)%,显著低于或高于33例轻中度AIH患者[分别为(0.5±0.2)%和(0.8±0.3)%,P<0.05];12例肝组织G3~4级AIH患者NKp46^(+)ILC3细胞百分比和Th17细胞百分比分别为(0.3±0.2)%和(1.3±0.4)%,显著低于或高于31例G1~2级AIH患者[分别为(0.5±0.2)%和(0.8±0.3)%,P<0.05];以外周血NKp46^(+)ILC3细胞百分比≤0.3%为截断点,判断AIH患者肝组织炎症重度活动的AUC为0.774(95%CI:0.592~0.957),其敏感度为75.0%,特异度为87.1%;以外周血Th17细胞百分比>1.1%为截断点,判断AIH患者肝组织炎症重度活动的AUC为0.853(95%CI:0.734~0.973),其敏感度为66.7%,特异度为90.3%.结论AIH患者外周血NKp46^(+)ILC3细胞水平降低,而Th17细胞水平升高.应用这种变化规律可能有助于判断AIH患者肝组织炎症活动分级,对评估AIH患者病情具有一定的临床意义. 展开更多
关键词 自身免疫性肝炎 NKp46+ilc3细胞 TH17细胞 临床意义
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International Linear Collider damping ring lattice design with two wiggler sections
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作者 孙一鹏 高杰 郭之虞 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第8期2343-2348,共6页
The International Linear Collider (ILC), which is based on super-conducting RF acceleration technology, requires the damping rings to provide beams with extremely small equilibrium emittance, and large acceptance to... The International Linear Collider (ILC), which is based on super-conducting RF acceleration technology, requires the damping rings to provide beams with extremely small equilibrium emittance, and large acceptance to ensure good injection efficiency for high-emittance, and high-energy spread beam from the positron source. In order to reduce the cost for ILC damping rings, an alternative lattice which is different from the baseline configuration design has been designed with modified FODO arc cells, and the total quadrupole number has been reduced by half. At the same time, to decrease the total cost involved in constructing access shafts needed to supply power, cryogenics etc. for the wigglers and other systems, the number of wiggler sections is decreased from 8 to 4, and further to 2. This new lattice has been optimized to have a good dynamic aperture. This alternative ILC damping ring lattice design will reduce the cost largely as compared with the baseline design. 展开更多
关键词 ilc damping ring FODO arc cell wiggler sections dynamic aperture
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CGRP抑制变应性鼻炎患者外周血2型固有淋巴细胞(ILC2)增殖、活化和细胞因子分泌
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作者 卓荷荻 祁雪萍 +4 位作者 徐诺文 王艳杰 安云芳 薛金梅 赵长青 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2023年第12期1094-1099,共6页
目的 探究降钙素基因相关肽(CGRP)对变应性鼻炎(AR)患者外周血中2型固有淋巴细胞(ILC2)的调控作用。方法 提取正常健康人、 AR患者外周血单个核细胞(PBMC),分别给予CGRP、白细胞介素33(IL-33)、 CGRP联合IL-33刺激3 d,以空白刺激为对照... 目的 探究降钙素基因相关肽(CGRP)对变应性鼻炎(AR)患者外周血中2型固有淋巴细胞(ILC2)的调控作用。方法 提取正常健康人、 AR患者外周血单个核细胞(PBMC),分别给予CGRP、白细胞介素33(IL-33)、 CGRP联合IL-33刺激3 d,以空白刺激为对照。采用流式细胞术检测4组ILC2的比例。分选ILC2后分别给予CGRP、 IL-33、 CGRP联合IL-33刺激3 d,以空白刺激为对照,采用流式细胞术检测ILC2中IL-5、 IL-13阳性细胞百分比,ELISA检测ILC2上清液IL-5、 IL-13水平。结果 AR患者外周血中ILC2百分比明显高于对照组。将PBMC培养后,经IL-33单一刺激,IL-5+ILC2、 IL-13+ILC2水平明显上升。加入IL-33联合CGRP刺激后,PBMC中IL-5+ILC2、 IL-13+ILC2水平明显降低;经CGRP单一刺激后PBMC中IL-5+ILC2、 IL-13+ILC2进一步降低。将ILC2分选后进行培养,经IL-33单一刺激,IL-5+ILC2、 IL-13+ILC2水平明显上升,加入IL-33联合CGRP刺激后,IL-5+ILC2、 IL-13+ILC2水平明显降低,经CGRP单一刺激,IL-5+ILC2、 IL-13+ILC2水平进一步降低。经IL-33联合CGRP共同刺激相较于经IL-33单一刺激,IL-5、 IL-13水平明显降低,经CGRP单一刺激,IL-5、 IL-13水平进一步降低。结论CGRP可以抑制AR中外周血ILC2的增殖、活化,在AR中发挥抗炎作用。 展开更多
关键词 变应性鼻炎(AR) 降钙素基因相关肽(CGRP) 2型固有淋巴细胞(ilc2)
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Unparticle Effects on Top Quark Pair Production at Photon Collider
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作者 LI Hai-Feng LI Hong-Lei SI Zong-Guo YANG Zhong-Juan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第4期707-712,共6页
The unparticle effects on tt^- production at the future photon collider are investigated. Distributions of tt^- invariant mass and that for transverse momentum of top quark with respect to Standard Model and unparticl... The unparticle effects on tt^- production at the future photon collider are investigated. Distributions of tt^- invariant mass and that for transverse momentum of top quark with respect to Standard Model and unparticle production are predicted. An odd valley with scalar unparticle contribution appears for some values of du, which is due to the big cancellation between the contribution from SM and that from unparticle. This character may be used to study the properties of scalar unparticle. Our investigations also show that scalar unparticle may play a significant role in tt^- production at the photon collider if it exists. 展开更多
关键词 UNPARTICLE top quark linear collider
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An SLC-Type e<sup>+</sup/>e<sup>&minus;</sup/>/γγ Facility at a Future Circular Collider
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作者 Radoje Belusevic 《Journal of Modern Physics》 2017年第1期1-16,共16页
It is proposed to place the arcs of an SLC-type facility inside the tunnel of a Future Circular Collider (FCC). Accelerated by a linear accelerator (linac), electron and positron beams would traverse the bending arcs ... It is proposed to place the arcs of an SLC-type facility inside the tunnel of a Future Circular Collider (FCC). Accelerated by a linear accelerator (linac), electron and positron beams would traverse the bending arcs in opposite directions and collide at centre-of-mass energies considerably exceeding those attainable at circular e+e&minus;colliders. The proposed SLC-type facility would have the same luminosity as a conventional two-linace e+e&minus;collider. Using an optical free-electron laser, the facility could be converted into a γγ collider. A superconducting L-band linac at the proposed facility may form a part of the injector chain for a 100-TeV proton collider in the FCC tunnel. The whole accelerator complex would serve as a source of e+e&minus;, γγ, pp and ep interactions. The L-band linac could also be used to produce high-intensity neutrino, kaon and muon beams for fixed-target experiments, as well as X-ray free-electron laser (XFEL) photons for applications in material science and medicine. 展开更多
关键词 Particle collider HIGGS PHYSICS SUPERCONDUCTING LINAC
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An <i>e</i><sup>+</sup><i>e</i><sup>-</sup>/<i>γγ</i>/<i>ep</i>Accelerator Complex at a Future Circular Collider
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作者 Radoje Belusevic 《Journal of High Energy Physics, Gravitation and Cosmology》 2019年第2期425-437,共13页
This is the second paper by the author describing versatile accelerator complexes that could be built at a Future Circular Collider (FCC) in order to produce e+e-, γγ and ep collisions. The facility described here f... This is the second paper by the author describing versatile accelerator complexes that could be built at a Future Circular Collider (FCC) in order to produce e+e-, γγ and ep collisions. The facility described here features an ILC-based e+e- collider placed tangentially to the FCC tunnel. If the collider is positioned asymmetrically with respect to the FCC tunnel, electron (or positron) bunches could be accelerated by both linacs before they are brought into collision with the 50-TeV beams from the FCC proton storage ring (FCC-pp). The two linacs may also form a part of the injector chain for FCC-pp. The facility could be converted into a γγ collider or a source of multi-MW beams for fixed-target experiments. 展开更多
关键词 ACCELERATOR FUTURE CIRCULAR collider (FCC) Experiments
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Production of Top-Pions Associated with W Boson at Next Generation γγ Colliders
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作者 LIU Yao-Bei SHEN Jie-Fen 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第8期318-322,共5页
In the context of topcolor-assisted technicolor (TC2) model, we study the charged and neutral top-pions production process γγ →W+ ∏t-∏t^0. We find that the production cross section is larger than that of the p... In the context of topcolor-assisted technicolor (TC2) model, we study the charged and neutral top-pions production process γγ →W+ ∏t-∏t^0. We find that the production cross section is larger than that of the process γγ→ W+ H-H in the minimal supersymmetric standard model. With reasonable values of the parameters in the TC2 model, the cross section can reach the level of a few fb. Furthermore, the flavor-changing (FC) decay mode ∏t^0 → te^- is the best channel to detect the neutral top-pion due to the clean SM background. With a large number of events and the clean background, the neutral top-pion should be observable at future linear colliders operating in γγ mode at the TeV energy scale. 展开更多
关键词 TC2 model cross section linear collider
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Measuring Mass and Spin of Dark Matter Particles with the Aid Energy Spectra of Single Lepton and Dijet at the e<sup>+</sup>e<sup>-</sup>Linear Collider
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作者 I. F. Ginzburg 《Journal of Modern Physics》 2014年第11期1036-1049,共14页
In many models stability of Dark Matter particles D is ensured by conservation of a new quantum number referred to as D -parity. Our models also contain charged D -odd particles D± with the same spin as D. (For m... In many models stability of Dark Matter particles D is ensured by conservation of a new quantum number referred to as D -parity. Our models also contain charged D -odd particles D± with the same spin as D. (For more information,please refer to the PDF.) 展开更多
关键词 DARK Matter W-BOSON LEPTON Linear collider
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Beam-beam effects and mitigation in a future proton-proton collider
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作者 Li-Jiao Wang Tanaji Sen +1 位作者 Jing-Yu Tang Lin-Hao Zhang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2022年第10期90-105,共16页
The beam-beam effects in a hadron collider with an unprecedented energy scale were studied.These effects are strongly related to the attainable luminosity of the collider.Long-range interactions were identified as the... The beam-beam effects in a hadron collider with an unprecedented energy scale were studied.These effects are strongly related to the attainable luminosity of the collider.Long-range interactions were identified as the major factor limiting the dynamic aperture,which is strongly dependent on the crossing angle,β*,and bunch population.Different mitigation methods of the beam-beam effects were addressed,with a focus on the compensation of long-range interactions by electric curren wires.The CEPC-SPPC project is a two-stage large circular collider,with a first-stage circular electron-positron collider(CEPC)and a second-stage super proton-proton collider(SPPC).The design of the SPPC aims to achieve a center-of-mass energy of 75 TeV and peak luminosity of approximately 1×10^(35) cm^(-2)s^(-1).We studied the beam-beam effects in the SPPC and tested the effectiveness of the mitigation methods.We found that with compensation using electric current wires,the dynamic aperture is at an acceptable level.Moreover,considering the significant emittance damping in this future proton-proton collider the beam-beam effects and compensation are more complicated and are studied using long-term tracking.It was found that with a smaller emittance,the head-on interactions with a crossing angle become more prominent in reducing the beam stability,and combined head-on and long-range compensation is needed to improve the beam quality.When the reduction in population owing to burnoff was included,it was found that the coupling between the transverse and longitudinal planes at smaller emittance is the main driving source of the instabilities.Thus,crab cavities and emittance control are also necessary than just the compensation of the long-range interactions to improve the beam stability.This study serves as an example for studying the beam-beam effects in future proton-proton colliders. 展开更多
关键词 Particle collider Beam-beam effects Luminosity Tune footprint Dynamic aperture
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