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PandaX-4T实验发布首个暗物质搜寻结果

发布者:黄聃发布时间:2021-07-09浏览次数:10

北京时间2021年7月8日下午4时在三年一度的马塞尔·格罗斯曼国际广义相对论大会上,中国锦屏地下实验室PandaX实验(“熊猫”实验)发言人刘江来教授公布了PandaX-4T实验的首个暗物质搜寻结果。此次结果基于PandaX-4T试运行95天的数据,用0.63吨•年的曝光量,再次刷新了暗物质反应截面的上限。

pandaxlitutanceyuzhouzhongshenmideanwuzhi。genjujinbainiandetianwenxueheyuzhouxueguanceyanjiu,yuzhouzhonganwuzhiyuezhanyuzhouzongzhiliangnengliangde27%,biyizhideputongwuzhiduochu5bei!xianjinkexuejiamenpubianrenwei,anwuzhishiyizhongwomenrengranweitancedaodechaochubiaozhunmoxingdexinlizi,tayuputongwuzhizhijianjiyoukenengcunzaiyizhongweiruodexianghuzuoyong,duitadetanceyoukenengdakailiziwulixindepianzhang。eryouyukenengcunzaidefanyingjiqiweiruo,womenbixushiyongzaijidibendidehuanjingxia(shendishiyanshi),liyongchaogaolingmindudetanceqilaisouxunzheileianwuzhi“youling”。pandaxshiyanshizai2009nianyoujixiangdongjiaoshoufaqi,shiyanzuoluoyusichuanliangshanzhoudezhongguojinpingdixiashiyanshi(cjpl),shiyanshiyouqinghuadaxueheyalongjiangshuidiangongtongkaifaguanli。shiyanshishangfangdeyanshicenghoududa2400mi,xiangbishijieshangtongleidixiashiyanshicjpldemaishenzuida、yuzhouxianbendiyezuidi。

pandaxcaiyongerxiangxingxianshijiantouyingshitanceqi,laitanceyinhexineidegaosuyundonganwuzhiliziyuxianhekenengfashengdepengzhuang。pengzhuangchanshengdedianziliziduiyouyidingbilihuizhongxinjiehefangchuguangzi,beitanceqizhongdeguangdianbeizengguantancedao;lingyibufentaoyidianzishoudianchangzuoyongpiaoyidaofangdaqiticengbeifangdabingtancedao。pandaxxilieshiyanyijingzaiguoquwanchengliangdaianwuzhitance(120gongjindepandax-iyiji580gongjindepandax-ii),qudetuchudechengguo。qizhongpandax-iiyiduqudeduianwuzhiliziguojilingxiandexianzhi,ruxuan2016nian《kejidaobao》shidakexuejinzhanhe2017niandumeiguowulixuehuiliangdian。

weiletishenganwuzhitancelingmindu,2019nianqipandaxtuanduizaijinpingerqi(guojiafagaiwei“shisanwu”zhongdakexuejichusheshixiangmuzhiyi)deb2shiyantingjiansheqilexinyidaide4dunjianwuzhitanceshiyan:pandax-4t;tongshiguojishangzaijiandeduodunjiyexianshiyanhaiyououmeihezuodexenonntshiyanyijimeiguodelzshiyan。weilejiakuaishiyanjindu,pandaxtuanduitiqiandajianlelinshipeitaosheshihe900dundechaochunshuipingbixitong。2019nian8yueshiyanzujinzhu;2020nian5yuedikefuyiqingyingxiangwanchengtanceqianzhuang;2020nian11yue28ri,tanceqidiaoshiwanchengjinrushiyunxing;2021nian4yue15rishiyunxingjieshu,gongqudewendingshuju95tian。zaicici95tianshujuzhong,pandax-4ttanceqigongjilule13.7yicishili,qizhongjinjin1058gedinengqushilitongguoleshujuzhiliangshaixuanjinruzuizhonganwuzhifenxishujuji,bendibipandax-iijiangdile4beizuoyou;qizhongyou6geshililuozaileanwuzhixinhaozuikejidecanshukongjianquyu。jiehemoxingfenxilegezhongbendichengfen,womenrenweizhei6geshilizaitongjishangyuwomendebendimoxingyizhi,womendeshujuweifaxiantongjixianzhudeanwuzhichaochuxinhao。youyupandax-4tchuzhongdelingmindu,cicijieguohangailezhiqianweibeiqitashiyantansuoguodeanwuzhiyuputongwuzhifanyingjiemiancanshukongjian,qudelemuqianduigaozhilianganwuzhizuihaodexianzhi。

yabowangyedenglushipandaxhezuozudezhuyaohezuodanweizhiyi,hetanceyuhedianzixueguojiazhongdianshiyanshidelinqingterenjiaoshou,zaicicidepandax-4tdiyicijieguofenxizhongzuochulezhongyaogongxian,tichuliyonggpujiasudechaojingximonilaigoujianxinhaojibendixiangyingmoxing,bingzaikedadajiandegpufuwuqishangzhidaoxueshengwanchengxinhaojibendixiangyingmoxingdekuangjiagoujian,weipandax-4tdiyicijieguolingmindudejisuanfahuilezhuyaozuoyong。

dancicishiyunxingzhong,womenyefaxianlechaochuwomenyuqidechuanhuajiawandebendiwuran,jidakenenglaiziyupandax-iijieshuqianzuihouyicidechuanhuajiawankeduyuandezhuruwuranlexianqi。muqianpandax-4tzhengzaijijikaizhanduiyutanceqizhongchuanhuajiawanbendidequchugongzuo,yuqijiangbabendizaijiangdiyibeiyishang,yiqidadaogenggaodeanwuzhitancelingmindu。


(wulixueyuan)


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