B physics beyond the Standard Model at one loop: complete renormalization group evolution below the electroweak scale

Aebischer, Jason; Fael, Matteo; Greub, Christoph; Virto, Javier

doi:10.1007/jhep09(2017)158

Cited by 120 publications

(130 citation statements)

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“…The WETrunner module fixes by default IR = m b , the b-quark mass scale, and uses the RGEs derived in [18].…”

Section: Dsixtools In a Nutshellmentioning

confidence: 99%

“…In the current version of DsixTools, IR is set by default at b-quark mass scale, m b = 4.18 GeV, and the RGE is based on the analytical results obtained in Ref. [18]. This is the list of routines implemented in this module:…”

Section: Wetrunner Modulementioning

confidence: 99%

“…The WETrunner module implements an evolution matrix formalism for this step, based on the results of Ref. [18]. This can be performed with the RunRGEsWET which creates the numerical arrays BS2Low, BC1Low, BS1unprimedLow and BS1primedLow, all of them functions of t = log 10 μ.…”

Section: Wetrunner Modulementioning

confidence: 99%

“…DsixTools implements the tree-level matching of the Warsaw basis to B = S = 1, 2 and B = C = 1 operators of the WET based on the results obtained in [17]. Last but not least, the relevant effects due to QCD and QED running from the electroweak scale down to the b-quark mass scale in the WET is also implemented in DsixTools, using the results in [18].…”

Section: Introductionmentioning

confidence: 99%

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DsixTools: the standard model effective field theory toolkit

et al. 2017

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We present DsixTools, a Mathematica package for the handling of the dimension-six standard model effective field theory. Among other features, DsixTools allows the user to perform the full one-loop renormalization group evolution of the Wilson coefficients in the Warsaw basis. This is achieved thanks to the SMEFTrunner module, which implements the full one-loop anomalous dimension matrix previously derived in the literature. In addition, DsixTools also contains modules devoted to the matching to the B = S = 1, 2 and B = C = 1 operators of the Weak Effective Theory at the electroweak scale, and their QCD and QED Renormalization group evolution below the electroweak scale.

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“…The WETrunner module fixes by default IR = m b , the b-quark mass scale, and uses the RGEs derived in [18].…”

Section: Dsixtools In a Nutshellmentioning

confidence: 99%

Section: Wetrunner Modulementioning

confidence: 99%

Section: Wetrunner Modulementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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DsixTools: the standard model effective field theory toolkit

et al. 2017

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“…We match the Z model directly onto the Weak effective theory (WET) at the electroweak scale. The Wilson coefficients of the WET are then evolved to the corresponding scales via the one-loop QCD anomalous dimensions [38,39]. In the following we report the lepton flavour violating observables used in the numerical analysis.…”

Section: Considered Observables 41 Preliminariesmentioning

confidence: 99%

Quark-lepton connections in Z′ mediated FCNC processes: gauge anomaly cancellations at work

Aebischer

Buras

Cerdà-Sevilla

et al. 2020

J. High Energ. Phys.

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We consider scenarios with a heavy Z gauge boson with flavour non-universal quark and lepton couplings with the goal to illustrate how the cancellation of gauge anomalies generated by the presence of an additional U(1) gauge symmetry would imply correlations between FCNC processes within the quark sector, within the lepton sector and most interestingly between quark flavour and lepton flavour violating processes. To this end we present simple scenarios with only left-handed flavour-violating Z couplings and those in which also right-handed flavour-violating couplings are present. The considered scenarios are characterized by a small number of free parameters but in contrast to gauge anomaly cancellation in the Standard Model, in which it takes place separately within each generation, in our scenarios anomaly cancellation involves simultaneously quarks and leptons of all three generations. Our models involve, beyond the ordinary quarks and leptons, three heavy right-handed neutrinos. The models with only left-handed FCNCs of Z involve beyond g Z and M Z two real parameters characterizing the charges of all fermions under the U(1) gauge symmetry and the CKM and PMNS ones in the quark and lepton sectors, respectively. The models with the right-handed FCNCs of Z involve few additional parameters. Imposing constraints from well measured ∆F = 2 observables we identify a number of interesting correlations that involve e.g. ε /ε, B s,d → µ + µ − , B → K(K * ) + − , K + → π + νν, K L → π 0 νν and purely lepton flavour violating decays like µ → eγ, µ → 3e, τ → 3µ and µ − e conversion among others. Also (g − 2) µ,e are considered. The impact of the experimental µ → eγ, µ → 3e and in particular µ − e conversion bounds on rare K and B decays is emphasized.

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A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

de Giorgi,

Piazza

2023

Fortschritte der Physik

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Within the assumption of Left‐Handed (LH) New Physics (NP), the relations between and for several Beyond the Standard Model (BSM) scenarios are reviewed, commonly considered to explain the Lepton flavor Universality (LFU) violation observed in charged and neutral‐current semileptonic B decays. The latest world averages that include the recent LHCb measurement and assess the possibility of simultaneously explaining B‐anomalies without spoiling current bounds on di‐neutrino and di‐tau modes are employed. This is particularly relevant in light of the upcoming results by Belle II on neutrinos and the continuing improvement in accuracy and sensitivity achieved in tau modes.

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B physics beyond the Standard Model at one loop: complete renormalization group evolution below the electroweak scale

Cited by 120 publications

References 53 publications

DsixTools: the standard model effective field theory toolkit

DsixTools: the standard model effective field theory toolkit

Quark-lepton connections in Z′ mediated FCNC processes: gauge anomaly cancellations at work

A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

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B physics beyond the Standard Model at one loop: complete renormalization group evolution below the electroweak scale

Cited by 120 publications

References 53 publications

DsixTools: the standard model effective field theory toolkit

DsixTools: the standard model effective field theory toolkit

Quark-lepton connections in Z′ mediated FCNC processes: gauge anomaly cancellations at work

A Lesson from RττK(*)$R_{\tau \tau }^{K^{(\ast )}}$ and RννK(*)$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

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A Lesson from RττK()$R_{\tau \tau }^{K^{(\ast )}}$ and RννK()$R_{\nu \nu }^{K^{(\ast )}}$ at Belle II