Renato da Silva Queiroz

Queiroz, Renato da Silva

doi:10.1590/s0034-77012003000200007

Cited by 2 publications

(3 citation statements)

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“…It concerns the proton decay. Since the model to avoid proton decay [9]. In the RM331 the situation is exactly the same as in the minimal 3-3-1 model, where the most dangerous proton decay operator is dimension-7,…”

Section: Fermion Masses and Proton Decaymentioning

confidence: 98%

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Minimal 3-3-1 model with only two Higgs triplets

Ferreira

Pinheiro²,

Pires³

et al. 2011

Phys. Rev. D

122

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The simplest non-abelian gauge extension of the electroweak standard model, the SU (3) c ⊗ SU (3) L ⊗ U (1) N , known as 3-3-1 model, has a minimal version which demands the least possible fermionic content to account for the whole established phenomenology for the well known particles and interactions. Nevertheless, in its original form the minimal 3-3-1 model was proposed with a set of three scalar triplets and one sextet in order to yield the spontaneous breaking of the gauge symmetry and generate the observed fermion masses. Such a huge scalar sector turns the task of clearly identifying the physical scalar spectrum a clumsy labor. It not only adds an obstacle for the development of its phenomenology but implies a scalar potential plagued with new free coupling constants. In this work we show that the framework of the minimal 3-3-1 model can be built with only two scalar triplets, but still triggering the desired pattern of spontaneous symmetry breaking and generating the correct fermion masses. We present the exact physical spectrum and also show all the interactions involving the scalars, obtaining a neat minimal 3-3-1 model far more suited for phenomenological studies at the current Large Hadron Collider. *

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Section: Fermion Masses and Proton Decaymentioning

confidence: 98%

“…There is another important issue to be considered in all versions of the minimal 3-3-1 model, which was first pointed out in Ref. [9]. It concerns the proton decay.…”

Section: Fermion Masses and Proton Decaymentioning

confidence: 99%

Minimal 3-3-1 model with only two Higgs triplets

Ferreira

Pinheiro²,

Pires³

et al. 2011

Phys. Rev. D

122

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“…In Eq.3 we have written a general Lagrangian for the doubly charged scalar including scalar (g s3 ) and pseudo-scalar (g p3 ) couplings. Doubly-charged scalars are typically invoked in models with triplet of scalars [33][34][35][36][37][38][39][40][41][42] and there are two diagrams contributing to the (g − 2) µ as shown in Fig.1(a)-1(b). The contribution from each diagram is given respectively by [29],…”

Section: Doubly Charged Scalarmentioning

confidence: 99%

New physics contributions to the muon anomalous magnetic moment: A numerical code

2014

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We consider the contributions of individual new particles to the anomalous magnetic moment of the muon, utilizing the generic framework of simplified models. We also present analytic results for all possible one-loop contributions, allowing easy application of these results for more complete models which predict more than one particle capable of correcting the muon magnetic moment. Additionally, we provide a Mathematica code to allow the reader straightforwardly compute any 1-loop contribution. Furthermore, we derive bounds on each new particle considered, assuming either the absence of other significant contributions to a µ or that the anomaly has been resolved by some other mechanism. The simplified models we consider are constructed without the requirement of SU (2) L invariance, but appropriate chiral coupling choices are also considered. In summary, we found the following particles capable of explaining the current discrepancy, assuming unit couplings: 2 TeV (0.3 TeV) neutral scalar with pure scalar (chiral) couplings, 4 TeV doubly charged scalar with pure pseudoscalar coupling, 0.3 − 1 TeV neutral vector boson depending on what couplings are used (vector, axial, or mixed), 0.5−1 TeV singly-charged vector boson depending on which couplings are chosen, and 3 TeV doubly-charged vector-coupled bosons. We also derive the following 1σ lower bounds on new particle masses assuming unit couplings and that the experimental anomaly has been otherwise resolved: a doubly charged pseudo-scalar must be heavier than 7 TeV, a neutral scalar than 3 TeV, a vector-coupled new neutral boson 600 GeV, an axial-coupled neutral boson 1.5 TeV, a singly-charged vector-coupled W 1 TeV, a doubly-charged vector-coupled boson 5 TeV, scalar leptoquarks 10 TeV, and vector leptoquarks 10 TeV. We emphasize that the quoted numbers apply within simplified models, but the reader can easily use our Mathemata code to calculate the contribution of their own model of new physics.

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Renato da Silva Queiroz

Cited by 2 publications

References 0 publications

Minimal 3-3-1 model with only two Higgs triplets

Minimal 3-3-1 model with only two Higgs triplets

New physics contributions to the muon anomalous magnetic moment: A numerical code

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