New physics effects in tree-level decays and the precision in the determination of the quark mixing angle γ

@article{Brod2015NewPE,
  title={New physics effects in tree-level decays and the precision in the determination of the quark mixing angle $\gamma$},
  author={Joachim Brod and Alexander Lenz and Gilberto Tetlalmatzi-Xolocotzi and Martin Wiebusch},
  journal={Physical Review D},
  year={2015},
  volume={92},
  pages={033002}
}
We critically review the assumption that no new physics is acting in tree-level B-meson decays and study the consequences for the ultimate precision in the direct determination of the Cabibbo-Kobayashi-Maskawa (CKM) angle γ. In our exploratory study we find that sizeable universal new physics contributions, ΔC1,2, to the tree-level Wilson coefficients C1,2 of the effective Hamiltonian describing weak decays of the b quark are currently not excluded by experimental data. In particular, we find… 

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References

SHOWING 1-10 OF 58 REFERENCES
Numerical updates of lifetimes and mixing parameters of B mesons
We update the Standard-Model predictions for several quantities related to Bs−B¯s and Bd−B¯d mixing. The mass and width differences in the Bs system read ΔMSMs=(17.3±2.6)ps−1 and
$B -> X_d \gamma$ and constraints on new physics
We combine recent progress in measuring the branching ratio of the decay B->X_d gamma$ with the discovery that hadronic uncertainties in the CP-averaged branching ratio drop out to a large extent.
New physics in $$b\rightarrow s$$b→s transitions after LHC run 1
We present results of global fits of all relevant experimental data on rare $$b \rightarrow s$$b→s decays. We observe significant tensions between the Standard Model predictions and the data. After
Measurement of the semileptonic charge asymmetry in $B^0$ meson mixing with the D0 detector
We present a measurement of the semileptonic mixing asymmetry for B0 mesons, a^d_{sl}, using two independent decay channels: B0 -> mu+D-X, with D- -> K+pi-pi-; and B0 -> mu+D*-X, with D*- -> antiD0
Precision measurement of CP violation in B(S)(0)→J/ΨK+K- decays.
TLDR
For the first time, the phase ϕs is measured independently for each polarization state of the K+K- system and shows no evidence for polarization dependence.
Weak annihilation and new physics in charmless $B \to M M$ decays
We use currently available data of nonleptonic charmless 2-body $B\to MM$ decays ($MM = PP, PV, VV$) that are mediated by $b\to (d, s)$ QCD- and QED-penguin operators to study weak annihilation and
On new physics in ΔΓd
A bstractMotivated by the recent measurement of the dimuon asymmetry by the DØ collaboration, which could be interpreted as an enhanced decay rate difference in the neutral Bd-meson system, we
Search for CP violation in B0-B0 mixing using partial reconstruction of B0→D*- Xℓ+ νℓ and a kaon tag.
TLDR
A search for CP violation in B0- B0 mixing with the BABAR detector finds the CP violating asymmetry ACP, corresponding to ΔCP=1-|q/p|=(0.29±0.84(-1.61)(+1.88))×10(-3).
...
1
2
3
4
5
...