Saturday, November 13, 2010

Shrinking Space

I never noticed the appearance of this new D0 paper on MSSM bounds, until Marco said that it made Lubos sad. Apparently D0 have just excluded a large favoured chunk of parameter space for the $\tan \beta$ parameter, which involves multiple fairy fields in the MSSM. Cheer up, Lubos, there is still a little white space left. Then again, there comes a point when one should probably cut one's losses ...


Actually, if there were fairy fields they would probably satisfy the popular stringy value of $\tan \beta = 36$, since this is the ratio of Koide scales that we obtain for the top and bottom quarks.

2 comments:

  1. MSSM may someday be parametered out of existence. Advantage of string theory over supersymnetry is that it doesn't make a single testable prediction.

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  2. Poor Lubos. It is hard to put all in one card :)

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