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First Evidence of New Physics in b <-> s Transitions

  1. Mar 6, 2008 #1
    First Evidence of New Physics in b <--> s Transitions

    Hi,

    please look at the following arXiv :

    http://arxiv.org/abs/0803.0659

    First Evidence of New Physics in b <--> s Transitions
    Authors: UTfit Collaboration: M. Bona, M. Ciuchini, E. Franco, V. Lubicz, G. Martinelli, F. Parodi, M. Pierini, P. Roudeau, C. Schiavi, L. Silvestrini, V. Sordini, A. Stocchi, V. Vagnoni
    (Submitted on 5 Mar 2008)
    Abstract: We combine all the available experimental information on Bs mixing, including the very recent tagged analyses of Bs to J/Psi phi by the CDF and D0 collaborations. We find that the phase of the Bs mixing amplitude deviates more than 3 sigma from the Standard Model prediction. While no single measurement has a 3 sigma significance yet, all the constraints show a remarkable agreement with the combined result. This is a first evidence of physics beyond the Standard Model. This result disfavours New Physics models with Minimal Flavour Violation with the same significance.
     
  2. jcsd
  3. Mar 6, 2008 #2
  4. Mar 10, 2008 #3
    Hello,

    but what you describe, isn't it Minimal Flavor Violation which seems disfavored by this measurement ?
     
  5. Mar 14, 2008 #4
    There is a new ph paper on this Bs excess related to SUSY :
    http://arxiv.org/PS_cache/arxiv/pdf/0803/0803.1898v1.pdf
    In this paper, they introduce R-parity violation to explain both Bs and Ds->lnu excess. The only problem now I guess is that SUSY has no more any dark matter candidate ?
    They say neutralino decays to mucb.
     
  6. Mar 14, 2008 #5

    kdv

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    But the lightest supersymmetric particle is absolutely stable, isn't? So if the neutralino is unstable what does it decay into?
     
  7. Mar 14, 2008 #6

    Vanadium 50

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    Not if R-parity is violated.
     
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