Built on

A. J. Buras, M. Jamin, and P. H. Weisz, Leading and next-to-leading QCD corrections to 𝛆 \varepsilon parameter and 𝐁 𝟎 − 𝐁 ¯ 𝟎 B^{0}-\bar{B}^{0} mixing in the presence of a heavy top quark
1990
Earlier work this paper cites.
F. Pisano and V. Pleitez, An SU(3) x U(1) model for electroweak interactions
1992
Earlier work this paper cites.
P. H. Frampton, Chiral dilepton model and the flavor question
1992
Earlier work this paper cites.
J. Urban, F. Krauss, U. Jentschura, and G. Soff, Next-to-leading order QCD corrections for the 𝐁 𝟎 − 𝐁 ¯ 𝟎 B^{0}-\bar{B}^{0} mixing with an extended Higgs sector
1998
Earlier work this paper cites.
R. A. Diaz, R. Martinez, and F. Ochoa, SU(3)(c) x SU(3)(L) x U(1)(X) models for beta arbitrary and families with mirror fermions
2005
Earlier work this paper cites.
A. Carcamo Hernandez, R. Martinez, and F. Ochoa, Z and Z’ decays with and without FCNC in 331 models
2006
Earlier work this paper cites.
A. J. Buras and D. Guadagnoli, Correlations among new CP violating effects in 𝚫 𝐅 = 𝟐 \Delta F=2 observables
Original
2008
Earlier work this paper cites.

Similar

A. J. Buras, D. Guadagnoli, and G. Isidori, On ϵ 𝐊 \epsilon_{K} beyond lowest order in the Operator Product Expansion
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2013
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2014
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Particle Data Group
2014
Cited alongside, same era.

Then

Heavy Flavor Averaging Group (HFAG)
Original
2014
Later among the works it cites.
CKMfitter Group
2014
Later among the works it cites.
T. Blum et al., 𝑲 → 𝝅 𝝅 K\rightarrow\pi\pi 𝚫 𝐈 = 𝟑 / 𝟐 \Delta I=3/2 decay amplitude in the continuum limit
2015
Closest in time.
RBC, UKQCD
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2015
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W. Altmannshofer and D. M. Straub, New physics in 𝐛 → 𝐬 b\rightarrow s transitions after LHC run 1
Original
2015
Closest in time.
J. Brod and M. Gorbahn, Next-to-Next-to-Leading-Order Charm-Quark Contribution to the CP Violation Parameter 𝛆 𝐊 \varepsilon_{K} and 𝚫 𝐌 𝐊 \Delta M_{K}

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2015

$\varepsilon'/\varepsilon$ in 331 Models

Buras, Andrzej J., De Fazio, Fulvia

Understand

Motivated by the recent findings that the ratio $\varepsilon'/\varepsilon$ in the Standard Model (SM) appears to be significantly below the data we investigate whether the necessary enhancement of this ratio can be obtained in 331 models, in which new physics (NP) contributions to $\varepsilon'/\varepsilon$ and other flavour observables are dominated by tree-level exchanges of a $Z^\prime$.

NP contributions to $\varepsilon'/\varepsilon$ in these models are governed by the electroweak operator $Q_8$ for which the hadronic matrix element is rather well known so that our analysis of NP contributions is subject to much smaller uncertainties than within the SM.
We consider seven 331 models selected in our earlier analysis on the basis of electroweak precision data.
Imposing the constraints from $\Delta F=2$ transitions we find that only three of these models can provide a significant positive shift in $\varepsilon'/\varepsilon$ up to $6\times 10^{-4}$ for $M_{Z^\prime}=3$ TeV.

Built on

A. J. Buras, M. Jamin, and P. H. Weisz, Leading and next-to-leading QCD corrections to 𝛆 \varepsilon parameter and 𝐁 𝟎 − 𝐁 ¯ 𝟎 B^{0}-\bar{B}^{0} mixing in the presence of a heavy top quark
1990
Earlier work this paper cites.
F. Pisano and V. Pleitez, An SU(3) x U(1) model for electroweak interactions
1992
Earlier work this paper cites.
P. H. Frampton, Chiral dilepton model and the flavor question
1992
Earlier work this paper cites.
J. Urban, F. Krauss, U. Jentschura, and G. Soff, Next-to-leading order QCD corrections for the 𝐁 𝟎 − 𝐁 ¯ 𝟎 B^{0}-\bar{B}^{0} mixing with an extended Higgs sector
1998
Earlier work this paper cites.
R. A. Diaz, R. Martinez, and F. Ochoa, SU(3)(c) x SU(3)(L) x U(1)(X) models for beta arbitrary and families with mirror fermions
2005
Earlier work this paper cites.
A. Carcamo Hernandez, R. Martinez, and F. Ochoa, Z and Z’ decays with and without FCNC in 331 models
2006
Earlier work this paper cites.
A. J. Buras and D. Guadagnoli, Correlations among new CP violating effects in 𝚫 𝐅 = 𝟐 \Delta F=2 observables
Original
2008
Earlier work this paper cites.

Similar

A. J. Buras, D. Guadagnoli, and G. Isidori, On ϵ 𝐊 \epsilon_{K} beyond lowest order in the Operator Product Expansion
Original
2010
Cited alongside, same era.
J. Brod and M. Gorbahn, ϵ 𝑲 \epsilon_{K} at Next-to-Next-to-Leading Order: The Charm-Top-Quark Contribution
Original
2010
Cited alongside, same era.
A. J. Buras, F. De Fazio, J. Girrbach, and M. V. Carlucci, The Anatomy of Quark Flavour Observables in 331 Models in the Flavour Precision Era
Original
2013
Cited alongside, same era.
A. J. Buras, F. De Fazio, and J. Girrbach, 331 models facing new 𝐛 → 𝐬 𝛍 + 𝛍 − b\to s\mu^{+}\mu^{-} data
Original
2014
Cited alongside, same era.
Particle Data Group
2014
Cited alongside, same era.

Then

Heavy Flavor Averaging Group (HFAG)
Original
2014
Later among the works it cites.
CKMfitter Group
2014
Later among the works it cites.
T. Blum et al., 𝑲 → 𝝅 𝝅 K\rightarrow\pi\pi 𝚫 𝐈 = 𝟑 / 𝟐 \Delta I=3/2 decay amplitude in the continuum limit
2015
Closest in time.
RBC, UKQCD
Original
2015
Closest in time.
W. Altmannshofer and D. M. Straub, New physics in 𝐛 → 𝐬 b\rightarrow s transitions after LHC run 1
Original
2015
Closest in time.
J. Brod and M. Gorbahn, Next-to-Next-to-Leading-Order Charm-Quark Contribution to the CP Violation Parameter 𝛆 𝐊 \varepsilon_{K} and 𝚫 𝐌 𝐊 \Delta M_{K}

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S. Aoki, Y. Aoki, C. Bernard, T. Blum, G. Colangelo, et al., Review of lattice results concerning low-energy particle physics

Original

2014

Cited alongside, same era.

A. J. Buras, M. Gorbahn, S. Jäger, and M. Jamin, Improved anatomy of 𝛆 ′ / 𝛆 \varepsilon^{\prime}/\varepsilon in the Standard Model

Original

Cited in the paper.

A. J. Buras, F. De Fazio, and J. Girrbach-Noe, Z-Z’ mixing and Z-mediated FCNCs in 𝐒 𝐔 ( 𝟑 ) 𝐂 × 𝐒 𝐔 ( 𝟑 ) 𝐋 × 𝐔 ( 𝟏 ) 𝐗 SU(3)_{C}\times SU(3)_{L}\times U(1)_{X} Models

Cited in the paper.

M. Blanke, A. J. Buras, and S. Recksiegel, Quark flavour observables in the Littlest Higgs model with T-parity after LHC Run 1

Original

Cited in the paper.

A. J. Buras, D. Buttazzo, and R. Knegjens, 𝑲 → 𝝅 𝝂 𝝂 ¯ K\to\pi\nu\bar{\nu} and ϵ ′ / ϵ \epsilon^{\prime}/\epsilon in Simplified New Physics Models

Cited in the paper.

A. J. Buras and J.-M. Gerard, Upper Bounds on 𝛆 ′ / 𝛆 \varepsilon^{\prime}/\varepsilon Parameters 𝐁 𝟔 ( 𝟏 / 𝟐 ) B_{6}^{(1/2)} and 𝐁 𝟖 ( 𝟑 / 𝟐 ) B_{8}^{(3/2)} from Large N QCD and other News

Cited in the paper.

A. J. Buras, D. Buttazzo, J. Girrbach-Noe, and R. Knegjens, 𝑲 + → 𝝅 + 𝝂 𝝂 ¯ {K}^{+}\to{\pi}^{+}\nu\overline{\nu} and 𝐊 𝐋 → 𝛑 𝟎 𝛎 𝛎 ¯ {K}_{L}\to{\pi}^{0}\nu\overline{\nu} in the Standard Model: status and perspectives

Cited in the paper.

Original

2036

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