Dimension-six terms in the Standard Model Lagrangian

Grza̧dkowski, Bohdan; Iskrzyński, Mateusz; Misiak, Mikołaj; Rosiek, Janusz

doi:10.1007/jhep10(2010)085

Cited by 2,030 publications

(2,745 citation statements)

References 34 publications

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“…Irrespectively of the high-energy details of such SM extensions, when evolved down to an energy scale where QCD becomes non-perturbative, they give rise to several effective operators of mass dimension six. They are known as the quark EDM (qEDM), quark chromo-EDM (qCEDM), gluon chromo-EDM (gCEDM), and various fourquark interactions [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Nuclear electric dipole moments in chiral effective field theory

Bsaisou

Vries

Hanhart

et al. 2015

J. High Energ. Phys.

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We provide a consistent and complete calculation of the electric dipole moments of the deuteron, helion, and triton in the framework of chiral effective field theory. The CP-conserving and CP-violating interactions are treated on equal footing and we consider CP-violating one-, two-, and three-nucleon operators up to next-to-leading-order in the chiral power counting. In particular, we calculate for the first time EDM contributions induced by the CP-violating three-pion operator. We find that effects of CP-violating nucleon-nucleon contact interactions are larger than those found in previous studies based on phenomenological models for the CP-conserving nucleon-nucleon interactions. Our results which apply to any model of CP violation in the hadronic sector can be used to test various scenarios of CP violation. As examples, we study the implications of our results on the QCD θ-term and the minimal left-right symmetric model.

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Section: Introductionmentioning

confidence: 99%

Nuclear electric dipole moments in chiral effective field theory

Bsaisou

Vries

Hanhart

et al. 2015

J. High Energ. Phys.

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“…2 Here our dimension six basis is defined in such a way that (in renormalizable theories) the operators O F F , O W 3 are only generated pertubatively at the loop level while the other ones can potentially be generated at treelevel. This particularly convenient basis has been already used in [9], is discussed more formally in [10], and is consistent with the general basis presented in [11]. We display below only the operators which will feed into anomalous gauge couplings, or will be closely related to their study.…”

Section: The Effective Lagrangianmentioning

confidence: 89%

Anomalous gauge couplings from composite Higgs and warped extra dimensions

Fichet

Gersdorff

2014

J. High Energ. Phys.

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We examine trilinear and quartic anomalous gauge couplings (AGCs) generated in composite Higgs models and models with warped extra dimensions. We first revisit the SU(2) L × U(1) Y effective Lagrangian and derive the charged and two-photon neutral AGCs. We derive the general perturbative contributions to the pure field-strength operators from spin 0, 1 2 , 1 resonances by means of the heat kernel method. In the composite Higgs framework, we derive the pattern of expected deviations from typical SO(N ) embeddings of the light composite top partner. We then study a generic warped extra dimension framework with AdS 5 background, recasting in few parameters the features of models relevant for AGCs. We also present a detailed study of the latest bounds from electroweak and Higgs precision observables, with and without brane kinetic terms. For vanishing brane kinetic terms, we find that the S and T parameters exclude KK gauge modes of the RS custodial [non-custodial] scenario below 7.7 [14.7] TeV, for a brane Higgs and below 6.6 [8.1] TeV for a Pseudo Nambu-Goldstone Higgs, at 95% CL. These constraints can be relaxed in presence of brane kinetic terms. The leading AGCs are probing the KK gravitons and the KK modes of bulk gauge fields in parts of the parameter space. In these scenarios, the future CMS and ATLAS forward proton detectors could be sensitive to the effect of KK gravitons in the multi-TeV mass range.

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“…Above M QCD , strong interactions are described by the most general Lagrangian with Lorentz, color, and electromagnetic gauge invariance among the lightest quarks, gluons, and photons. The effectively dimension-six / P/ T terms at this scale can be written as [12,13,14,15]…”

Section: P -And T -Violating Chiral Lagrangianmentioning

confidence: 99%

“…in terms of a dimensionless parameter w. The fourth and fifth operators [14,15] are / P/ T FQ operators, with coefficients…”

Section: P -And T -Violating Chiral Lagrangianmentioning

confidence: 99%

Electric dipole moments of light nuclei from chiral effective field theory

et al. 2011

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We set up the framework for the calculation of electric dipole moments (EDMs) of light nuclei using the systematic expansion provided by chiral effective field theory (EFT). We take into account parity (P ) and time-reversal (T ) violation which, at the quark-gluon level, originates from the QCD vacuum angle and dimension-six operators capturing physics beyond the Standard Model. We argue that EDMs of light nuclei can be expressed in terms of six low-energy constants that appear in the P -and T -violating nuclear potential and electric current. As examples, we calculate the EDMs of the deuteron, the triton, and 3 He in leading order in the EFT expansion.

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Dimension-six terms in the Standard Model Lagrangian

Cited by 2,030 publications

References 34 publications

Nuclear electric dipole moments in chiral effective field theory

Nuclear electric dipole moments in chiral effective field theory

Anomalous gauge couplings from composite Higgs and warped extra dimensions

Electric dipole moments of light nuclei from chiral effective field theory

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