[tt] the physics arXiv blog

[Eugen Leitl]

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From: the physics arXiv blog <howdy at arxivblog.com>
Date: Mon, 1 Sep 2008 12:32:07 -0500 (CDT)
To: eugen at leitl.org
Subject: the physics arXiv blog
Reply-To: the physics arXiv blog <howdy at arxivblog.com>


[1]the physics arXiv blog

   [2]Orbiting observatory finds dark matter, but what kind?

   Posted: 01 Sep 2008 04:06 AM CDT

   [3]pamela-data.jpg 

   The world of cosmology is abuzz with rumours that an orbiting
   observatory called PAMELA has discovered dark matter. Last month, the
   PAMELA team gave a few selected physicists a sneak preview of their
   results at a conference in Stockholm.

   Here's the deal. The PAMELA people  say their experiment has seen more
   positrons than can be explained by known physics and that this excess
   exactly matches what dark matter particles would produce if they were
   annihilating each other at the center of the galaxy.

   What makes this particularly exciting is that [4]other orbiting
   observatories have also seen similar, but less clear cut, evidence of
   dark matter annihilations.

   Since then, the shutters have come down. With the prospect of a major
   discovery on their hands  and with publication in a major journal at
   stake, the team has closed ranks to re-analyse their data and prepare
   it for exclusive publication. Not a word has leaked from the PAMELA
   team since their preliminary announcement.

   That hasn't stopped physicists speculating for themselves. Today Marco
   Cirelli from the CEA near Paris in France and Alessandro Strumia from
   the Università di Pisa in Italy present their own analysis of the
   PAMELA data.

   Cosmologists have long speculated on the nature of dark matter and
   dreamt up all manner of models and particles to explain it. The big
   question is which type of particle does the PAMELA data point towards.

   Today, Cirelli and Strumia stake their own claim. They say the data
   agrees with their own model called Minimal Dark Matter in which the
   particle responsible is called the "Wino" (no, it  really is called
   the wino).

   But given the PAMELA team's reluctance to publish just yet, where did
   Cirelli and Strumia get the data? The answer is buried in a footnote
   in their paper.

     "The preliminary data points for positron and antiproton fluxes
     plotted in our figures have been extracted from a photo of the
     slides taken during the talk, and can thereby slightly differ from
     the data that the PAMELA collaboration will officially publish."

   Can't fault them for initiative.

   Ref: [5]arxiv.org/abs/0808.3867: Minimal Dark Matter Predictions and
   the PAMELA Positron Excess

   [6][arXivblog?i=MpMYjP] 
   [7][arXivblog?i=uX5SKL] [8][arXivblog?i=SNvDML]
   [9][arXivblog?i=5vQlFl] [10][arXivblog?i=UNqTzL]
   [11][arXivblog?i=6QGJml] [12][arXivblog?i=g7MH6L]
   [13][arXivblog?i=NOZTCl] [14][arXivblog?i=hJtvBL] 
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References

   1. http://arxivblog.com/
   2. http://feeds.feedburner.com/~r/arXivblog/~3/380317734/
   3. http://arxivblog.com/wp-content/uploads/2008/09/pamela-data.jpg
   4. http://arxivblog.com/?p=79
   5. http://arxiv.org/abs/0808.3867
   6. http://feeds.feedburner.com/~a/arXivblog?a=MpMYjP
   7. http://feeds.feedburner.com/~f/arXivblog?a=uX5SKL
   8. http://feeds.feedburner.com/~f/arXivblog?a=SNvDML
   9. http://feeds.feedburner.com/~f/arXivblog?a=5vQlFl
  10. http://feeds.feedburner.com/~f/arXivblog?a=UNqTzL
  11. http://feeds.feedburner.com/~f/arXivblog?a=6QGJml
  12. http://feeds.feedburner.com/~f/arXivblog?a=g7MH6L
  13. http://feeds.feedburner.com/~f/arXivblog?a=NOZTCl
  14. http://feeds.feedburner.com/~f/arXivblog?a=hJtvBL
  15. http://arxivblog.com/
  16. http://www.feedburner.com/fb/a/emailunsub?id=8632699&key=kesJ612ZsV
  17. http://feeds.feedburner.com/arXivblog
  18. http://feeds.feedburner.com/arXivblog

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-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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