Revisiting the top quark chromomagnetic dipole moment in the SM

Aranda, J. I.; Cisneros-Pérez, T.; Montaño, J.; Quezadas-Vivian, B.; Ramírez–Zavaleta, F.; Tututi, E. S.

doi:10.1140/epjp/s13360-021-01102-x

Cited by 12 publications

(29 citation statements)

References 38 publications

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“…In the context of the SM, the CMDM is induced at the one-loop level [18,34], while the CEDM arises at the three-loop level [35]. In addition, it is usual in the literature to define dimensionless dipoles for quarks [12,14,[31][32][33], just as…”

Section: One-loop Amplitudesmentioning

confidence: 99%

“…Subsequently, in Refs. [10,12] complete one-loop contributions to the CMDM of the top quark within the SM were calculated. This last SM prediction matches well with the recent experimental measurement achieved by the CMS Collaboration [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…From the theoretical point of view, it is known that the CMDM of the SM quarks cannot be well defined in a static scenario, that is to say, when q 2 = 0; it can only be established an off-shell CMDM, which is consistent with an observable given that it is gauge invariant, gauge independent, infrared finite and ultraviolet finite [11,12,26,27]. Thus, we will present the evaluation of this observable considering an off-shell gluon (q 2 = 0) at large-momentum transfer.…”

Section: Introductionmentioning

confidence: 99%

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Chromomagnetic dipole moment of the top quark in the Bestest Little Higgs model

Aranda¹,

Cisneros-Pérez²,

Cruz-Albaro³

et al. 2021

Preprint

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We calculate the chromomagnetic dipole moment of the top quark, μt, in the context of the Bestest Little Higgs model. This extension of the Standard Model aims to solve the hierarchy problem without fine tuning, by introducing one-loop corrections to the Higgs boson mass through heavy top quark partners and heavy gauge bosons. We found that the largest resulting value for the chromomagnetic is μt ∼ 10 −5 and the lowest is around 10 −6 , mainly due to the Higgs boson of the Standard Model, which couples to both the top quark of the Standard Model and its heavy partners. Also, we present a wide variety of new Feynman rules involved in our calculation.

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Section: One-loop Amplitudesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chromomagnetic dipole moment of the top quark in the Bestest Little Higgs model

Aranda¹,

Cisneros-Pérez²,

Cruz-Albaro³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…In the Standard Model (SM), the anomalous chromomagnetic dipole moment (CMDM) is induced at the oneloop level and receives contributions from quantum chromodynamics (QCD), electroweak (EW) and Yukawa (YK) sectors [1][2][3][4]. Moreover, it has already been established in the literature that the non-static CMDM (μ t (q 2 )) is consistent with the properties of an observable, since this one is gauge invariant, gauge independent, infrared (IR) finite and ultraviolet (UV) finite [3,4]. On the other hand, from the effective Lagrangian approach it is straightforward to appreciate that μq and the chromoelectric dipole moment (CEDM) dq are proportional to both the Abelian threebody g qq and to the non-Abelian four-body gg qq couplings [5].…”

Section: Introductionmentioning

confidence: 99%