2008/05/28 by Monika Blanke, Andrzej J. Buras, Blanke, Monika +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.0805.4393
21 pages, 9 figures, 1 table. Version with full resolution plots available at http://users.physik.tu-muenchen.de/mblanke/LHT-2008.pdf. Note added on the omitted term in Z-penguin contribution. For an updated analysis see arXiv:0906.5454
openalex publication_date 2008/05/28 · arxiv created 2010/01/15 · arxiv updated 2010/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The non-minimal flavour violating interactions of mirror quarks and new heavy gauge bosons in the Littlest Higgs model with T-parity (LHT) give rise to naturally large CP-violating effects in the Bs system. In view of a large new CP phase in Bs - anti-Bs mixing hinted by the CDF and D0 data and the recent UTfit analysis, we update our 2006 analysis of particle-antiparticle mixing and rare K and B decays in the LHT model, using the most recent values of a number of input parameters and performing a more careful error analysis. We find that the CP-asymmetry Spsi phi can easily reach values ~ 0.15-0.20, compared to the SM value ~ 0.04, while higher values are rather unlikely though not excluded. Large enhancements are also possible in the branching ratios for KL -> pi0 nu anti-nu, K+ -> pi+ nu anti-nu and KL -> pi0 l+ l- with much more modest effects in Bs,d -> mu+ mu-. We perform a detailed study of correlations between the latter decays and Spsi phi as well as of the correlation between Spsi phi and Spsi KS. We also point out that the possible tension between epsilonK and the tree level CKM determination recently hinted by various analyses can easily be resolved in the LHT model.