{"id":22457,"date":"2015-10-26T00:08:51","date_gmt":"2015-10-25T16:08:51","guid":{"rendered":"https:\/\/case.ntu.edu.tw\/blog\/?p=22457"},"modified":"2018-08-01T16:14:46","modified_gmt":"2018-08-01T08:14:46","slug":"%e3%80%90%e7%89%a9%e7%90%86%e6%96%b0%e7%9f%a5%e3%80%91%e6%a8%99%e6%ba%96%e6%a8%a1%e5%9e%8b%e7%9a%84%e6%96%b0%e7%bc%ba%e5%8f%a3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/case.ntu.edu.tw\/blog\/?p=22457","title":{"rendered":"\u3010\u7269\u7406\u65b0\u77e5\u3011\u6a19\u6e96\u6a21\u578b\u7684\u65b0\u7f3a\u53e3\uff1f"},"content":{"rendered":"

\u25a0\u4f4d\u65bc\u6b50\u6d32\u6838\u5b50\u7814\u7a76\u7d44\u7e54(CERN)\u7684LHC\u7684LHCb\u5be6\u9a57\u5c0dB\u4ecb\u5b50\u7684\u8870\u8b8a\u9032\u884c\u4ed4\u7d30\u7684\u6e2c\u91cf\uff0c\u7d50\u679c\u5be6\u9a57\u7d50\u679c\u8207\u6a19\u6e96\u6a21\u578b\u7684\u9810\u6e2c\u4e0d\u592a\u4e00\u81f4\u3002<\/strong><\/span><\/p>\n

\"Photo\uff1aCERN\"
Photo\uff1aCERN<\/figcaption><\/figure>\n

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

\u7c92\u5b50\u7269\u7406\u7684\u6a19\u6e96\u6a21\u578b\u53ef\u4ee5\u7528\u4f86\u89e3\u91cb\u57fa\u672c\u7c92\u5b50\u9593\u7684\u4ea4\u4e92\u4f5c\u7528\u4e26\u9032\u884c\u8a08\u7b97\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5be6\u9a57\u7c92\u5b50\u7269\u7406\u5b78\u5bb6\u53ef\u4ee5\u5c0d\u9019\u4e9b\u4ea4\u4e92\u4f5c\u7528\u9032\u884c\u7cbe\u78ba\u6e2c\u91cf\uff0c\u4e26\u628a\u7d50\u679c\u8207\u7406\u8ad6\u8a08\u7b97\u6bd4\u8f03\u3002\u7d93\u904e\u4e86\u4e94\u5341\u591a\u5e74\u7684\u76f8\u4e92\u9a57\u8b49\uff0c\u7c92\u5b50\u7269\u7406\u7684\u6a19\u6e96\u6a21\u578b\u5e7e\u4e4e\u901a\u904e\u4e86\u6240\u6709\u9a57\u8b49\uff0c\u8a8d\u70ba\u662f\u6700\u6210\u529f\u7684\u7269\u7406\u7406\u8ad6\u4e4b\u4e00\u3002\u4e5f\u56e0\u70ba\u5982\u6b64\uff0c\u5c0d\u7c92\u5b50\u7269\u7406\u5b78\u5bb6\u800c\u8a00\uff0c\u4ed6\u5011\u8a8d\u70ba\u9019\u4e0d\u662f\u500b\u597d\u6d88\u606f\u3002\u56e0\u70ba\u5982\u679c\u7684\u73fe\u8c61\u90fd\u53ef\u4ee5\u900f\u904e\u6a19\u6e96\u6a21\u578b\u7b97\u51fa\u4f86\u800c\u4e14\u90fd\u8ddf\u5be6\u9a57\u4e00\u81f4\uff0c\u90a3\u7c92\u5b50\u7269\u7406\u5c31\u627e\u4e0d\u51fa\u65b0\u7684\u7a81\u7834\u9ede\uff0c\u6c92\u6709\u8fa6\u6cd5\u627e\u5230\u5176\u4e0d\u8db3\u7684\u5730\u65b9\uff0c\u9032\u800c\u7e7c\u7e8c\u767c\u5c55\u524d\u9032\u3002<\/p>\n

\u4e0d\u904e\u5c31\u50cf\u524d\u6587\u6700\u5f8c\u6240\u8aaa\u7684\uff0c\u6a19\u6e96\u6a21\u578b\u300c\u5e7e\u4e4e\u300d\u901a\u904e\u4e86\u6240\u6709\u9a57\u8b49\u3002\u6700\u8fd1LHCb\u7684\u5be6\u9a57\u7d50\u679c\u5c31\u7d66\u4e86\u7c92\u5b50\u7269\u7406\u5b78\u5bb6\u4e00\u4e9b\u65b0\u7684\u5e0c\u671b\u3002\u6211\u5011\u65e5\u5e38\u4e2d\u5e38\u898b\u7684\u96fb\u5b50\u662f\u6a19\u6e96\u6a21\u578b\u4e2d\u7684\u4e00\u7a2e\u57fa\u672c\u7c92\u5b50\u3002\u800c\u4e14\u5728\u6a19\u6e96\u6a21\u578b\u4e2d\uff0c\u4e8b\u5be6\u4e0a\u6709\u8457\u96fb\u5b50\u4e09\u5144\u5f1f\u3002\u9664\u4e86\u96fb\u5b50\u4e4b\u5916\uff0c\u53e6\u5916\u9084\u6709\u5169\u500b\u66f4\u91cd\u7684\u89aa\u621a\uff0c\u5206\u5225\u662f\u7df2\u5b50(muon)\u8ddf\u6fe4\u5b50(tau)\u3002\u7df2\u5b50\u8ddf\u6fe4\u5b50\u7684\u6027\u8cea\u90fd\u8ddf\u96fb\u5b50\u4e00\u6a23\uff0c\u53ea\u662f\u7df2\u5b50\u6bd4\u96fb\u5b50\u91cd\uff0c\u6fe4\u5b50\u53c8\u6bd4\u7df2\u5b50\u66f4\u91cd\u3002\u6240\u4ee5\u5728\u6a19\u6e96\u6a21\u578b\u88e1\u9762\uff0c\u5982\u679c\u4e0d\u8003\u616e\u8cea\u91cf\u5dee\u7570\uff0c\u90a3\u9ebc\u9019\u4e09\u7a2e\u7c92\u5b50\u7684\u884c\u70ba\u61c9\u8a72\u5b8c\u5168\u4e00\u81f4\u3002<\/p>\n

LHCb\u5be6\u9a57\u53ef\u4ee5\u5c0dLHC\u4e2d\u7d93\u7531\u9ad8\u80fd\u8cea\u5b50\u5c0d\u649e\u6240\u7522\u751f\u51fa\u4f86\u7684B\u4ecb\u5b50\u9032\u884c\u7cbe\u78ba\u7684\u6e2c\u91cf\u3002B\u4ecb\u5b50\u662f\u7531\u5e95\u5938\u514b(bottom quark)\u8207\u53e6\u5916\u4e00\u500b\u5938\u514b\u6240\u7d50\u5408\u6210\u7684\u7c92\u5b50\uff0c\u4e00\u65e6\u7522\u751f\u4e4b\u5f8c\u6703\u5f88\u5feb\u8870\u8b8a\u3002\u7269\u7406\u5b78\u5bb6\u4e3b\u8981\u7531\u8870\u8b8a\u4e4b\u5f8c\u6240\u7522\u751f\u7684\u7c92\u5b50\u4f86\u56de\u63a8B\u4ecb\u5b50\u7684\u6027\u8cea\u3002LHCb\u4ed4\u7d30\u6e2c\u91cf\u7684B\u4ecb\u5b50\u8870\u8b8a\u5f8c\u7522\u751f\u6fe4\u5b50\u8ddf\u7522\u751f\u7df2\u5b50\u7684\u6a5f\u7387\u3002\u6839\u64da\u6a19\u6e96\u6a21\u578b\uff0c\u518d\u8003\u616e\u8cea\u91cf\u6548\u61c9\u5f8c\uff0c\u9019\u5169\u7a2e\u53cd\u61c9\u7684\u6a5f\u7387\u61c9\u8a72\u76f8\u7b49\u3002\u4f46\u662fLHCb\u6240\u770b\u5230\u7684\u7d50\u679c\u8207\u6a19\u6e96\u6a21\u578b\u6240\u9810\u671f\u7684\u7d50\u679c\u4e26\u4e0d\u4e00\u81f4\uff0c\u5927\u7d04\u67092.1\u500b\u6a19\u6e96\u5dee\u7684\u5dee\u7570\u3002<\/p>\n

\u5728\u7c92\u5b50\u7269\u7406\u7684\u4e16\u754c\u4e2d\uff0c\u7531\u65bc\u6240\u6709\u7684\u5be6\u9a57\u7d50\u679c\u90fd\u662f\u7531\u5927\u91cf\u7684\u6578\u64da\u7d71\u8a08\u800c\u4f86\uff0c \u70ba\u4e86\u907f\u514d\u89c0\u6e2c\u5230\u7684\u7d50\u679c\u662f\u7531\u7d71\u8a08\u8aa4\u5dee\u6240\u7522\u751f\uff0c\u6240\u4ee5\u4e09\u500b\u6a19\u6e96\u5dee\u7684\u7d50\u679c\u53ef\u4ee5\u7a31\u70ba\u770b\u5230\u300c\u8de1\u8c61\u300d(envidence)\uff0c\u4e94\u500b\u6a19\u6e96\u5dee\u624d\u53ef\u4ee5\u88ab\u8a8d\u70ba\u662f\u300c\u8b49\u64da\u300d(discovery)\u3002\u6216\u662f\u8aaa\uff0c\u5169\u500b\u6a19\u6e96\u5dee\u7684\u7d50\u679c\uff0c\u5927\u7d04\u67095%\u7684\u6a5f\u7387\u662f\u56e0\u70ba\u7d71\u8a08\u8aa4\u5dee\u6240\u9020\u6210\uff0c\u4e09\u500b\u6a19\u6e96\u5dee\u5927\u7d04\u662f0.3%\u7684\u6a5f\u7387\uff0c\u4e94\u500b\u6a19\u6e96\u5dee\u5247\u662f0.00005%\u3002<\/p>\n

\u6240\u4ee5LHCb\u7684\u5be6\u9a57\u7d50\u679c\u662f2.1\u500b\u6a19\u6e96\u5dee\uff0c\u7167\u7406\u8aaa\u662f\u4e0d\u592a\u6709\u8da3\u7684\u7d50\u679c\uff0c\u4e0d\u904e\u537b\u4f9d\u820a\u5f15\u8d77\u4e86\u76f8\u7576\u5927\u7684\u91cd\u8996\u3002\u539f\u56e0\u5f88\u7c21\u55ae\uff0c\u56e0\u70ba2012\u5e74\uff0c\u4f4d\u65bc\u7f8e\u570b\u53f2\u4e39\u4f5b\u76f4\u7dda\u52a0\u901f\u5668(SLAC)\u7684BABAR\u5be6\u9a57\uff0c\u5229\u7528\u6b63\u8ca0\u96fb\u5b50\u5c0d\u5c0d\u649e\u7522\u751fB\u4ecb\u5b50\uff0c\u5c0d\u540c\u6a23\u7684\u53cd\u61c9\u9032\u884c\u6e2c\u91cf\uff0c\u4e5f\u5f97\u5230\u4e86\u985e\u4f3c\u7684\u7d50\u679c\uff0c\u7d50\u679c\u662f2.7\u500b\u6a19\u6e96\u5dee\u3002\u800c\u4f4d\u65bc\u65e5\u672cKEK\u5be6\u9a57\u5ba4\u7684Belle\u5be6\u9a57\uff0c\u4e5f\u770b\u5230\u4e86\u985e\u4f3c\u7684\u7d50\u679c\uff0c\u53ea\u662f\u6548\u61c9\u6c92\u6709\u90a3\u9ebc\u986f\u8457\u3002<\/p>\n

\u4e09\u500b\u4e0d\u540c\u7684\u5be6\u9a57\u5718\u968a\uff0c\u4e0d\u540c\u7684\u5be6\u9a57\u72c0\u6cc1\u537b\u540c\u6642\u770b\u5230\u4e86\u985e\u4f3c\u7684\u7d50\u679c\u3002\u56e0\u6b64\u5118\u7ba1\u7d50
\n\u679c\u5c1a\u672a\u9054\u5230\u4e09\u500b\u6a19\u6e96\u5dee\uff0c\u4f46\u537b\u5f15\u8d77\u4e86\u7c92\u5b50\u7269\u7406\u754c\u76f8\u7576\u5927\u7684\u8208\u8da3\u3002\u5927\u5bb6\u90fd\u5f88\u671f\u5f85\uff0c\u5982\u679c\u80fd\u5920\u6709\u66f4\u591a\u7684\u6578\u64da\uff0c\u7a76\u7adf\u6703\u4e0d\u6703\u4e00\u8209\u8de8\u904e\u4e09\u500b\u6a19\u6e96\u5dee\uff0c\u751a\u81f3\u662f\u4e94\u500b\u6a19\u6e96\u5dee\uff0c\u70ba\u6a19\u6e96\u6a21\u578b\u5e36\u4f86\u65b0\u7684\u7f3a\u53e3\uff1f\u8b93\u6211\u5011\u62ed\u76ee\u4ee5\u5f85\u3002<\/p>\n

\u539f\u59cb\u8ad6\u6587<\/strong>
\nMeasurement of the Ratio of Branching Fractions B(B\u00af0\u2192D*+\u03c4\u2212\u03bd\u00af\u03c4)\/B(B\u00af0\u2192D*+\u03bc\u2212\u03bd\u00af\u03bc)
\nLHCb Collaboration
\nPhys. Rev. Lett. 115, 111803
\nhttp:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.115.111803<\/a><\/p>\n

\u53c3\u8003\u8cc7\u6599<\/strong>
\n1. Nature News 2015\/09\/03: LHC signal hints at cracks in physics' standard model
\n<\/a>2. Phys.Org 2015\/08\/27: Evidence suggests subatomic particles could defy the standard model<\/a><\/p>\n

--<\/strong><\/span>
\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(Sciscape.org)\u7e3d\u7de8\u8f2f\u3002<\/strong><\/span><\/p>\n

 <\/p>\n

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

\u25a0\u4f4d\u65bc\u6b50\u6d32\u6838\u5b50\u7814\u7a76\u7d44\u7e54(CERN)\u7684LH<\/p>\n","protected":false},"author":20,"featured_media":22459,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3293,39],"tags":[2116,818,1576,2118,1435,2117,1535],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/10\/Crop_0490.jpg","_links":{"self":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/22457"}],"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=22457"}],"version-history":[{"count":7,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/22457\/revisions"}],"predecessor-version":[{"id":32352,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/22457\/revisions\/32352"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/media\/22459"}],"wp:attachment":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}