{"id":28609,"date":"2017-07-24T00:25:50","date_gmt":"2017-07-23T16:25:50","guid":{"rendered":"https:\/\/case.ntu.edu.tw\/blog\/?p=28609"},"modified":"2018-07-29T10:04:39","modified_gmt":"2018-07-29T02:04:39","slug":"lhc%e7%99%bc%e7%8f%be%e4%b8%80%e5%80%8b%e6%96%b0%e7%9a%84%e5%90%ab%e6%9c%89%e5%85%a9%e5%80%8b%e9%ad%85%e5%a4%b8%e5%85%8b%e7%9a%84%e7%b2%92%e5%ad%90","status":"publish","type":"post","link":"https:\/\/case.ntu.edu.tw\/blog\/?p=28609","title":{"rendered":"LHC\u767c\u73fe\u4e00\u500b\u65b0\u7684\u542b\u6709\u5169\u500b\u9b45\u5938\u514b\u7684\u7c92\u5b50"},"content":{"rendered":"

\u25a0LHC\u7684LHCb\u5be6\u9a57\u65b0\u767c\u73fe\u4e00\u500b\u5e36\u6709\u4e09\u500b\u5938\u514b\u7684\u7c92\u5b50\u3002\u7279\u5225\u7684\u662f\u4e09\u500b\u5938\u514b\u4e2d\uff0c\u6709\u5169\u500b\u662f\u76f8\u5c0d\u8f03\u91cd\u7684\u9b45\u5938\u514b\u3002<\/span><\/strong><\/p>\n

\"\"
Image \u00a9 CERN<\/figcaption><\/figure>\n

\u64b0\u6587\uff5c<\/strong>\u9673\u52c1\u8c6a<\/p>\n

\u6839\u64da\u7c92\u5b50\u7269\u7406\u7684\u6a19\u6e96\u6a21\u578b\uff0c\u73fe\u4eca\u7684\u7269\u8cea\u4e16\u754c\u90fd\u662f\u7531\u5938\u514b\u8207\u8f15\u5b50\u6240\u69cb\u6210\u7684\u3002\u6211\u5011\u4e2d\u5e38\u898b\u7684\u96fb\u5b50\u662f\u8f15\u5b50\u7684\u4e00\u7a2e\u3002\u5938\u514b\u76ee\u524d\u88ab\u8a8d\u70ba\u662f\u7269\u8cea\u7684\u6700\u57fa\u672c\u7d50\u69cb\uff0c\u7576\u5169\u500b\u5938\u514b\u7d50\u5408\u5728\u4e00\u8d77\u6703\u5f62\u6210\u4ecb\u5b50\uff0c\u800c\u4e09\u500b\u5938\u514b\u5247\u6703\u5f62\u6210\u91cd\u5b50\u3002\u69cb\u6210\u6240\u6709\u539f\u5b50\u6838\u7684\u8cea\u5b50\u8207\u4e2d\u5b50\u5c31\u662f\u7531\u4e09\u500b\u5938\u514b\u6240\u69cb\u6210\u3002<\/p>\n

\u7f8e\u570b\u7269\u7406\u5b78\u5bb6 Murray Gell-Mann \u5728\u516d\u96f6\u5e74\u4ee3\u900f\u904e\u5c0d\u5f37\u5b50\u7684\u5206\u985e\uff0c\u63d0\u51fa\u4e86\u5938\u514b\u6a21\u578b\uff0c\u4e26\u6210\u529f\u7684\u9810\u6e2c\u51fa\u65b0\u7c92\u5b50 Omega (\u4e09\u500b\u5947\u5938\u514b)\u7684\u5b58\u5728\u3002\u57281974\u5e74\u7684\u6642\u5019\uff0c\u4e01\u8087\u4e2d\u8207 Burton Richter \u767c\u73fe\u4e86\u9b45\u5938\u514b(c)\u4e4b\u5f8c\uff0c\u7269\u7406\u5b78\u5bb6\u4e86\u89e3\u9664\u4e86\u4e09\u500b\u8cea\u91cf\u8f03\u8f15\u7684\u4e0a\u5938\u514b(u)\uff0c\u4e0b\u5938\u514b(d)\u548c\u5947\u5938\u514b(s)\u4e4b\u5916\uff0c\u9084\u6709\u5176\u5b83\u66f4\u91cd\u7684\u5938\u514b\u5b58\u5728\u3002\u4e4b\u5f8c\u7269\u7406\u5b78\u5bb6\u53c8\u767c\u73fe\u4e86\u66f4\u91cd\u7684\u5e95\u5938\u514b(b)\u8207\u9802\u5938\u514b(t)\u3002\u4e00\u822c\u4f86\u8aaa\uff0c\u9802\u5938\u514b\u81ea\u6210\u4e00\u985e\uff0c\u800c\u9b45\u5938\u514b\u8207\u5e95\u5938\u514b\u88ab\u5408\u7a31\u70ba\u91cd\u5938\u514b (heavy flavor quarks)\u3002<\/p>\n

\u7531\u65bc\u9802\u5938\u514b\u7684\u8cea\u91cf(~170GeV)\u9060\u5927\u65bc\u5176\u4ed6\u7684\u4e94\u7a2e\u5938\u514b(\u6b21\u91cd\u7684\u5e95\u5938\u514b\u8cea\u91cf\u7d045GeV)\uff0c\u56e0\u6b64\u76ee\u524d\u6c92\u6709\u767c\u73fe\u9802\u5938\u514b\u53ef\u4ee5\u8207\u5176\u4ed6\u5938\u514b\u5f62\u6210\u4ecb\u5b50\u6216\u91cd\u5b50\u7684\u60c5\u6cc1\u3002\u4f46\u662f\u5c0d\u7269\u7406\u5b78\u5bb6\u800c\u8a00\uff0c\u5c0b\u627e\u542b\u6709\u91cd\u5938\u514b\u7684\u5f37\u5b50\uff0c\u5c0d\u4e86\u89e3\u5938\u514b\u9593\u7684\u4ea4\u4e92\u4f5c\u7528\u76f8\u7576\u91cd\u8981\uff0c\u56e0\u70ba\u5982\u679c\u4e09\u500b\u5938\u514b\u53ef\u4ee5\u7d44\u6210\u4e00\u500b\u91cd\u5b50\uff0c\u90a3\u9ebc\u9664\u4e86\u9802\u5938\u514b\u4ee5\u5916\u7684\u4e94\u7a2e\u5938\u514b\u61c9\u8a72\u53ef\u4ee5\u7d44\u6210\u5404\u5f0f\u5404\u6a23\u7684\u5f37\u5b50\u3002\u4f46\u662f\u7d93\u904e\u591a\u5e74\u7684\u5be6\u9a57\u7d50\u679c\uff0c\u7269\u7406\u5b78\u5bb6\u5f88\u5feb\u5c31\u9ad4\u8a8d\u5230\u8981\u627e\u542b\u6709\u91cd\u5938\u514b\u7684\u5f37\u5b50\u5f88\u4e0d\u5bb9\u6613\uff0c\u542b\u6709\u5169\u500b\u91cd\u5938\u514b\u7684\u5f37\u5b50\u5c31\u66f4\u7f55\u898b\u4e86\u3002<\/p>\n

\u4f4d\u65bcLHC\u7684LHCb\u5be6\u9a57\uff0c\u65e5\u524d\u767c\u8868\u4e86\u6700\u65b0\u7684\u7814\u7a76\u7d50\u679c\uff0c\u5ba3\u4f48\u767c\u73fe\u4e86\u4e00\u500b\u65b0\u7c92\u5b50\u3002\u9019\u500b\u7c92\u5b50\u7684\u540d\u5b57\u53eb\u505aXi_cc^++\uff0c\u7531\u5169\u500b\u9b45\u5938\u514b\u8207\u4e00\u500b\u4e0a\u5938\u514b\u5f62\u6210\u3002\u8cea\u91cf\u7d043.621GeV\uff0c\u76f8\u7576\u65bc\u8cea\u5b50\u7684\u56db\u500d\u91cd\u3002<\/p>\n

\u9019\u7a2e\u542b\u6709\u5169\u500b\u91cd\u5938\u514b\u7684\u7c92\u5b50\u4e4b\u6240\u4ee5\u4e0d\u5bb9\u6613\u5c0b\u627e\uff0c\u4e3b\u56e0\u6709\u4e8c\u3002\u5176\u4e00\u662f\u4e0d\u5bb9\u6613\u7522\u751f\uff0c\u5176\u4e8c\u662f\u4e0d\u5bb9\u6613\u5206\u6790\u3002\u4ee5LHC\u4f86\u8aaa\uff0c\u7576\u9ad8\u80fd\u8cea\u5b50\u5c0d\u649e\u5f8c\uff0c\u6bcf\u6b21\u78b0\u649e\u6703\u7522\u751f\u5927\u7d04\u4e8c\u5341\u500b\u7c92\u5b50\u3002\u5075\u6e2c\u5668\u5fc5\u9808\u6709\u8457\u76f8\u7576\u9748\u654f\u80fd\u91cf\u8207\u52d5\u91cf\u89e3\u6790\u5ea6\uff0c\u4e26\u4e14\u80fd\u5920\u5340\u5206\u5404\u500b\u7c92\u5b50\u7684\u7a2e\u985e\uff0c\u7269\u7406\u5b78\u5bb6\u624d\u80fd\u5920\u900f\u904e\u7406\u8ad6\u4e0a\u9810\u6e2c\u7684\u8870\u8b8a\u6a21\u5f0f\u4f86\u91cd\u5efa\u9019\u500b\u65b0\u7c92\u5b50\u3002\u4ee5\u9019\u500b\u65b0\u7c92\u5b50\u4f86\u8aaa\uff0cLHCb\u9700\u8981\u6bcf\u6b21\u7684\u78b0\u649e\u4e8b\u4ef6\u4e2d\u5148\u627e\u51fa\u4e00\u500b\u5e36\u4e00\u500b\u6b63\u96fb\u8377\u7684lambda_c\u7c92\u5b50\uff0c\u4e00\u500b\u5e36\u8ca0\u96fb\u8377\u7684K\u4ecb\u5b50\uff0c\u4e00\u5c0d\u6b63\u8ca0pi\u4ecb\u5b50\u7684\u4e8b\u4ef6\u5f8c\uff0c\u624d\u80fd\u91cd\u5efa\u51fa\u9019\u500b\u65b0\u7c92\u5b50\u3002<\/p>\n

\u900f\u904e\u9019\u500b\u65b0\u7c92\u5b50\uff0c\u7269\u7406\u5b78\u5bb6\u53ef\u4ee5\u7814\u7a76\u9019\u7a2e\u5e36\u5169\u500b\u91cd\u5938\u514b\u7684\u5f37\u5b50\u5982\u4f55\u8207\u7b2c\u4e09\u500b\u8f03\u8f15\u7684\u5938\u514b\u4f5c\u7528\u3002\u6709\u4e9b\u7406\u8ad6\u8a8d\u70ba\u9019\u4e09\u500b\u5938\u514b\u4e2d\u7684\u5169\u500b\u91cd\u5938\u514b\u53ef\u80fd\u6703\u5f62\u6210\u4e00\u500b\u985e\u4f3c\u96d9\u661f\u7d50\u69cb\u7684\u7cfb\u7d71\uff0c\u5169\u8005\u76f8\u4e92\u904b\u884c\uff0c\u7136\u5f8c\u6bd4\u8f03\u8f15\u7684\u4e0a\u5938\u514b\u7e5e\u8457\u9019\u500b\u300c\u96d9\u661f\u7cfb\u7d71\u300d\u8f49\u3002\u4f46\u662f\u5426\u771f\u662f\u5982\u6b64\uff0c\u5247\u9700\u8981\u66f4\u591a\u7684\u5be6\u9a57\u6578\u64da\u4f86\u5354\u52a9\u6211\u5011\u8a8d\u8b58\u9019\u500b\u7cfb\u7d71\u3002<\/p>\n

\u539f\u59cb\u8ad6\u6587:<\/strong>
\nObservation of the doubly charmed baryon \u039e++cc<\/a>
\nLHCb Collaboration<\/p>\n

\u76f8\u95dc\u5831\u5c0e:<\/strong>
\nCERN Press Release 2017\/07\/06: The LHCb experiment is charmed to announce observation of a new particle with two heavy quarks<\/a><\/p>\n

--<\/strong><\/span>
\n\u4f5c\u8005\uff1a\u9673\u52c1\u8c6a\u3000\u79d1\u6559\u4e2d\u5fc3\u7279\u7d04\u5beb\u624b\uff0c\u5f9e\u4e8b\u79d1\u666e\u6587\u7ae0\u5beb\u4f5c\u30022011\u5e74\u65bc\u7f8e\u570b\u7d10\u7d04\u5dde\u7acb\u77f3\u6eaa\u5927\u5b78(SUNY at Stony Brook)\u53d6\u5f97\u535a\u58eb\u5b78\u4f4d\uff0c\u7814\u7a76\u4e3b\u984c\u70ba\u76f8\u5c0d\u8ad6\u6027\u91cd\u96e2\u5b50\u78b0\u649e(Relativistic Heavy Ion Collision)\u3002\u9577\u671f\u64d4\u4efb\u4e2d\u6587\u79d1\u5b78\u65b0\u805e\u7db2\u7ad9\u300c\u79d1\u666f\u300d\uff08Sciscape.org\uff09\u7e3d\u7de8\u8f2f\u3002<\/strong><\/span><\/p>\n

 <\/p>\n

\"\u52a0\u5165\u597d\u53cb\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\u25a0LHC\u7684LHCb\u5be6\u9a57\u65b0\u767c\u73fe\u4e00\u500b\u5e36\u6709\u4e09\u500b\u5938\u514b\u7684\u7c92\u5b50\u3002\u7279\u5225\u7684\u662f\u4e09\u500b\u5938\u514b\u4e2d\uff0c\u6709\u5169\u500b\u662f\u76f8\u5c0d\u8f03\u91cd\u7684\u9b45\u5938\u514b\u3002<\/p>\n","protected":false},"author":20,"featured_media":28611,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3293,39],"tags":[3503,1576,1575,1494,3502],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2017\/07\/xicc_lhcb_discovery_00006.png","_links":{"self":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/28609"}],"collection":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28609"}],"version-history":[{"count":5,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/28609\/revisions"}],"predecessor-version":[{"id":31797,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/28609\/revisions\/31797"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/media\/28611"}],"wp:attachment":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28609"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}