CP violation and limits on New Physics including recent $B_s$ measurements

Abstract

We analyse present constraints on the SM parameter space and derive, in a model independent way, various bounds on New Physics contributions to $B_d^0$--${\bar{B}}_d^0$ and $B_s^0$--${\bar{B}}_s^0$ mixings. Our analyses include information on a large set of asymmetries, leading to the measurement of the CKM phases $\gamma$ and $\bar{\beta }$, as well as recent data from D0 and CDF related to the $B_s^0$--${\bar{B}}_s^0$ system such as the measurement of $\Delta M_{B_s}$, $A_{SL}$ and $\Delta {\Gamma }_s^{CP}$. We examine in detail several observables such as the asymmetries $A_{sl}^d$, $A_{SL}$, the width differences $\Delta {\Gamma }_d$ and $\Delta {\Gamma }_s^{CP}$ and discuss the rôle they play in establishing the limits on New Physics. The present data clearly favour the SM, with the New Physics favoured region placed around the SM solution. A New Physics solution significantly different from the SM is still allowed, albeit quite disfavoured (2.6% probability). We analyse the presently available indirect knowledge on the phase $\bar{\chi }$ entering in $B_s^0$--${\bar{B}}_s^0$ mixing and study the impact of a future measurement of $\bar{\chi }$ to be achieved at LHC, through the measurement of the time-dependent CP asymmetry in $B_s\to J/\Psi \Phi$ decays.

29 pages, 31 figures; updated analyses and references

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Cited by in corpus (21)

• Theory and phenomenology of two-Higgs-doublet models
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Theoretical update of Bs-Bs-bar mixing
• Improved measurement of the CKM angle gamma in B^-+ -> D^(*) K^(*)-+ decays with a Dalitz plot analysis of D decays to K_S^0 pi^+ pi^- and K_S^0 K^+ K^-
• Unparticle physics effects in B_s mixing
• Evidence for direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B-+ --> D(*) K(*)-+ decays
• Measurement of the $CP$-violating phase ${\varphi }_s$ in $B_s^0\to J/\psi \varphi$ decays in ATLAS at 13 TeV
• The Hunt for New Physics in the Flavour Sector with up vector-like quarks
• Nearest-Neighbour Interaction from an Abelian Symmetry and Deviations from Hermiticity
• Small violations of unitarity, the phase in Bs mixing and visible t->cZ decays at the LHC
• Complex CKM matrix, spontaneous CP violation and generalized $\mu$-$\tau$ symmetry
• Quark mixing in the discrete dark matter model
• Reconstruction of Quark Mass Matrices with Weak Basis Texture Zeroes from Experimental Input
• Higgs induced FCNC as a source of new physics in $b\to s$ transitions
• Electroweak, QCD and flavour physics studies with ATLAS data from Run 2 of the LHC
• Minimal flavour violations and tree level FCNC
• Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics
• Fermion number conservation and two Higgs doublet models without tree level flavour changing neutral currents
• Impact of Delta mB_s on the determination of the unitary triangle and bounds on physics beyond the Standard Model
• Implications of CP violating 2HDM in B physics
• Nondecoupling of Heavy Fermions and a Special Yukawa Texture