slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Andreas Crivellin Albert Einstein Center for Fundamental Physics Institute for Theoretical Physics PowerPoint Presentation
Download Presentation
Andreas Crivellin Albert Einstein Center for Fundamental Physics Institute for Theoretical Physics

Loading in 2 Seconds...

play fullscreen
1 / 13

Andreas Crivellin Albert Einstein Center for Fundamental Physics Institute for Theoretical Physics - PowerPoint PPT Presentation


  • 103 Views
  • Uploaded on

Andreas Crivellin Albert Einstein Center for Fundamental Physics Institute for Theoretical Physics University of Bern. Flavour Phenomenology of Two-Higgs-Doublet Models. Outline:. Introductions: Yukawa interactions in 2HDMs Phenomenology Constraints from FCNC processes Tauonic B decays

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Andreas Crivellin Albert Einstein Center for Fundamental Physics Institute for Theoretical Physics' - tobias-raymond


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Andreas Crivellin

Albert Einstein Center for Fundamental Physics

Institute for Theoretical Physics

University of Bern

Flavour Phenomenology

of Two-Higgs-Doublet Models

outline
Outline:
  • Introductions: Yukawa interactions in 2HDMs
  • Phenomenology
    • Constraints from FCNC processes
    • Tauonic B decays
    • LFV processes
  • Conclusions
introduction
Introduction

Yukawa interactions

2hdm of type ii mssm at tree level
2HDM of type II(MSSM at tree-level)
  • One Higgs doublet couples only to down-quarks (and charged leptons), the other Higgs doubletcouples only to up-quarks.
  • 2 additional free parameters:tan(β)=vu/vd and the heavy Higgs mass
  • All flavor-violations is due to the CKM matrix: neutral Higgs-quark couplings are flavor-conserving.
2hdm of type iii
2HDM of type III
  • Both Higgs doublets couple simultaneously to up and down quarks.
  • The parameters describe flavor-changing neutral Higgs interactions
  • In the MSSM, are induced via loops
type ii 2hdm
Type-II 2HDM
  • Allowed 2σ regions from:(superimposed)

Tension from

type iii constraints from m
Type-III: constraints from M→µ+µ-
  • B → µ+µ- constrains
  • Bs → µ+µ- constrains
  • KL → µ+µ- constrains
  • D → µ+µ- constrains

and unconstrained

from tree-level FCNCs

type iii constraints from b s d
Type-III: Constraints from b→s(d)γ
  • constrains
  • constrains
  • still unconstrained
tauonic b decays
Tauonic B decays
  • Constructive contribution to B→τν using is possible.
  • B→D(*)τν and B→Dτν can be explained simultaneously using . Check model via

Allowed

regions from:

lepton flavor violation
Lepton Flavor violation
  • Correlations between and

Predicted ratio in the 2HDM of type III

upper limits on lepton flavour violating b decays
Upper limits on lepton flavour violating B decays

Allowed regions respecting the constraints from and

conclusions
Conclusions
  • The 2HDM of type II is disfavored by current data on tauonic B decays
  • In the 2HDM with generic Yukawa structure all off-diagonal elements except must be small.
  • A 2HDM of type III with flavour violation in the up-sector can explain B→τν, B→Dτν and B→D*τν simultaneously using .

enhancement of A0→tc

  • Interesting correlations between among lepton flavor violating observables.