Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-07-19
Phys.Lett. B546 (2002) 96-107
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, one postscript figure
Scientific paper
10.1016/S0370-2693(02)02639-4
Considering the MSSM with the CKM matrix as the only source of flavour violation and heavy supersymmetric particles at large $\tan\beta$, we analyze the correlation between {\it the increase} of the rates of the decays $B^0_{s,d}\to \mu^+\mu^-$ and {\it the suppression} of $\Delta M_s$, that are caused by the enhanced flavour changing neutral Higgs couplings to down-type quarks. We give analytic formulae for the neutral and charged Higgs couplings to quarks including large $\tan\beta$ resummed corrections in the $SU(2)\times U(1)$ limit and comment briefly on the accuracy of this approximation. For $0.8\le (\Delta M_s)^{\rm exp}/(\Delta M_s)^{\rm SM}\le 0.95$ we find $6\cdot 10^{-7}\ge BR(B^0_s\ra \mu^+\mu^-)^{\rm max} \ge 4\cdot 10^{-8}$ and $1.4\cdot 10^{-8}\ge BR(B^0_d\ra \mu^+\mu^-)^{\rm max}\ge 1\cdot 10^{-9}$. For $(\Delta M_s)^{\rm exp} \ge (\Delta M_s)^{\rm SM}$ substantial enhancements of $B^0_{s,d}\ra\mu^+\mu^-$ relative to the expectations based on the Standard Model are excluded. With $(\Delta M_s)^{\rm exp}>15.0/$ps a conservative analysis of $(\Delta M_s)^{\rm SM}$ gives $BR(B^0_s\ra \mu^+\mu^-)\simlt1.2\cdot10^{-6}$ and $BR(B^0_d\ra \mu^+\mu^-)\simlt3\cdot10^{-8}$. However, we point out that in the less likely scenario in which the squark mixing is so large that the neutral Higgs contributions dominate $\Delta M_s$, the rates for $B^0_{s,d}\to \mu^+\mu^-$ increase with increasing $\Delta M_s$ and the bounds in question are weaker. Violation of all these correlations and bounds would indicate new sources of flavour violation.
Buras Andrzej J.
Chankowski Piotr H.
Rosiek Janusz
Slawianowska Lucja
No associations
LandOfFree
Correlation between Delta M_s and B^0_{s,d} --> mu^+ mu^- in Supersymmetry at Large tan beta does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Correlation between Delta M_s and B^0_{s,d} --> mu^+ mu^- in Supersymmetry at Large tan beta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlation between Delta M_s and B^0_{s,d} --> mu^+ mu^- in Supersymmetry at Large tan beta will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-397306