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Effects of the fourth generation on \(\Delta M_{B_{d,s}}\) in \(B^0\)\(\bar B^0\) mixing

  • W.-J. Huo
Theoretical physics

Abstract.

We investigate the mass differences \(\Delta M_{B_{d,s}}\) in \(B^0_{d,s}\)\(\bar B^0_{d,s}\) mixing with a new up-like quark \(t^{\prime}\) in the sequential fourth generation model. We give the basic formulae for \(\Delta M_{B_{d,s}}\) in this model and obtain two kinds of numerical results for \(\Delta M_{B_{s}}\) as a function of \(m_{t^{\prime}}\). We find that one of our results can satisfy the present experimental lower bound of \(\Delta M_{B_s}\). We also get the constraints of the fourth generation CKM factor \(V^*_{t'b}V_{t'd}\), as a function of \(t'\), from the experimental measurements of \(\Delta M_{B_d}\). Thus, \(\Delta M_{B_{d,s}}\) provides a possible test of the fourth generation and may give a signal of new physics.

Keywords

Generation Model Experimental Measurement Mass Difference Fourth Generation Basic Formula 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2002

Authors and Affiliations

  • W.-J. Huo
    • 1
  1. 1.CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China CN

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