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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">科学家探测到暗物质粒子存在证据 </h1> <p class="xg1"> 时间：2013-4-17 10:14<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1781)</em> 评论: 0</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>众所周知，难以捉摸的大质量弱相互作用粒子很少与正常物质发生交互，因此很难进行探测。科学家认为它们像桌球一样偶尔反弹和分散，原子核残留少量能量，能够被地下深处的大型强子对撞机以及空间站阿尔法磁谱仪的相关 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><P>科学家首次观测到暗物质粒子存在的确凿证据，暗物质被认为能够凝结宇宙空间，但此前从未直接观测到。美国德州A&M大学高能量<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>学家鲁帕克-马哈帕特拉进行了国际超级冷冻暗物质搜索实验(SuperCDMS)，他指出，类似大质量弱相互作用粒子(WIMPs)的信号达到3级西格玛水平，在高能量物理领域，具有5级西格玛水平的证据是一项重大发现。因此这项发现是非常令人兴奋的，但相关证据并非完全令人信服，我们需要更多的数据进行确认。<BR><BR>众所周知，难以捉摸的大质量弱相互作用粒子很少与正常物质发生交互，因此很难进行探测。科学家认为它们像桌球一样偶尔反弹和分散，原子核残留少量能量，能够被地下深处的大型强子对撞机以及空间站阿尔法磁谱仪的相关仪器跟踪分析。</P> <P><A href="http://www.oecr.com/data/attachment/portal/201304/17/101349e074n0x4pezq2n90.jpg" target=_blank><IMG src="http://www.oecr.com/data/attachment/portal/201304/17/101349e074n0x4pezq2n90.jpg"></A></P> <P>马哈帕特称，在CDMS-II实验中，硅探测器大量曝光获得了最新分析<a href="http://theory.oecr.com" target="_blank" class="relatedlink">资料</a>，这是该实验的初期阶段，共有来自18个国际性研究机构的50多位科学家参与研究实验。<BR><BR>他还指出，我们证实暗物质微粒存在的证据具有99.8%可靠性，我们希望达到99.9999%可靠性，在3级西格玛水平，暗示获得重要发现；当达到4级西格玛水平，是有证据表明获得重要发现；达到5级西格玛水平将证实获得重要发现。</P> <DIV><FONT color="#808080" size=2><IMG src="http://www.oecr.com/xwb/images/bgimg/icon_logo.png"> 已同步至 <a href="http://api.t.sina.com.cn/2200118572/statuses/3568017433148023" target="_blank">update的微博</A></FONT></DIV></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=3168&hash=7c588d68296929d499cb464048c7f4a2&handlekey=clickhandle" 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