Implications of large dimuon CP asymmetry in Bd,s decays on minimal flavor violation with low tan β

Kfir Blum*, Yonit Hochberg, Yosef Nir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The D0 collaboration has recently announced evidence for a dimuon CP asymmetry in Bd,s decays of order one percent. If confirmed, this asymmetry requires new physics. We argue that for minimally flavor violating (MFV) new physics, and at low tanβ = νud, there are only two four-quark operators (Q2,3) that can provide the required CP violating effect. The scale of such new physics must lie below 260 GeV √tanβ. The effect is universal in the Bs and B d systems, leading to Sψk ∼ sin 2β-0.15 and Sψφ ∼ 0.25. The effects on ∈K and on electric dipole moments are negligible. The most plausible mechanism is tree-level scalar exchange. MFV supersymmetry with low tanβ will be excluded. Finally, we explain how a pattern of deviations from the Standard Model predictions for Sψφ, Sψk and ∈K can be used to test MFV and, if MFV holds, to probe its structure in detail.

Original languageAmerican English
Article number35
JournalJournal of High Energy Physics
Volume2010
Issue number9
DOIs
StatePublished - 2010
Externally publishedYes

Keywords

  • B-physics
  • Beyond Standard Model
  • CP violation

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