Finally, a MAGIC test for string theory?

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	Finally, a MAGIC test for string theory?

Mohir

9-10-2007 7:06 AM

949 views

tags:

physics, quantum, string theory, photon

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/e28832fe-4399-4f10-ad34-e69c13b8a937/7C33F2C3-3490-478F-9A30-38D0CCD998CA/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.newscientist.com/article.ns?id=dn12609&feedId=online-news_rss20" href="http://www.newscientist.com/article.ns?id=dn12609&feedId=online-news_rss20" style="font-size: 11px;">www.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.newscientist.com/article.ns?id=dn12609&feedId=online-news_rss20"><H2 class="colspacer inline">Finally, a MAGIC test for string theory?</H2></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.newscientist.com/article.ns?id=dn12609&feedId=online-news_rss20"><P>BEING 4 minutes late doesn't usually cause physicists around the world to fizz with excitement - but it's a different matter if the latecomer is a photon, and its tardiness could indicate a breakdown of relativity on cosmic scales. What's more, this delay could provide us with our first hints of quantum gravity at work, and thus be a unique way of <A href="http://www.newscientist.com/channel/fundamentals/mg19526121.200-string-theory-the-fightback.html" linkindex="21">testing string theory</A>. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.newscientist.com/article.ns?id=dn12609&feedId=online-news_rss20"><P>Last month, the MAGIC gamma-ray telescope collaboration based on La Palma in the Canary Islands announced that they had measured a 4-minute time difference between the arrival of high and low-energy gamma rays released at the same time in a flare from the Markarian 501 galaxy, some half a billion light years away. According to Einstein's theory of special relativity, both sets of photons should have arrived simultaneously, and the team is controversially <A target="nsarticle" href="http://www.arxiv.org/abs/0708.2889" linkindex="22">claiming that the discrepancy is due to the first  ...</A></P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/7C33F2C3-3490-478F-9A30-38D0CCD998CA/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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