Effective lagrangian analysis of new interactions and flavour conservation

Buchmüller, W.; Wyler, D.

doi:10.1016/0550-3213(86)90262-2

Cited by 2,191 publications

(3,002 citation statements)

References 30 publications

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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%

“…(8) the first (second) term represents the isoscalar d 0 (d 0 ) and isovector d 3 (d 3 ) components of the qEDM (qCEDM). Although these interactions have canonical dimension five, they originate just above the Standard Model scale M W from dimension-six operators [12] involving in addition the carrier of electroweak symmetry breaking, the Higgs field. They are thus proportional to the vacuum expectation value of the Higgs field, which can be traded in for the ratio of the quark mass to Yukawa coupling, m q /f q .…”

Section: P -And T -Violating Chiral Lagrangianmentioning

confidence: 99%

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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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Section: P -And T -Violating Chiral Lagrangianmentioning

confidence: 99%

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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“…In this section, we briefly explain the effective-Lagrangian approach [5] and optimalobservable method [6] used in our analysis. In addition, polarization parameters of PLC are reviewed.…”

Section: Frameworkmentioning

confidence: 99%

“…The SM Lagrangian L SM is modified by the addition of a series of SU(3) × SU(2) × U(1) gauge-invariant operators with coefficients suppressed by inverse powers of Λ. Among those operators the largest contribution comes from dimension-6 operators, denoted as O i , since dimension-5 operators violate lepton number [5] and are irrelevant for the processes considered here. Consequently we have…”

Section: Effective Lagrangianmentioning

confidence: 99%

New-Physics Search through γγ→tt¯→ℓX/bX

Grza̧dkowski¹,

Hioki²,

Ohkuma³

et al. 2006

Nuclear Physics B - Proceedings Supplements

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We probe optimal beam polarizations for new-physics search in top-quark and Higgs-boson sectors at Photon Linear Colliders (PLC). Expressing possible nonstandard effects generated by SU(2) × U(1) gauge-invariant dimension-6 effective operators as anomalous top and Higgs couplings, we estimate expected statistical sensitivities of these couplings in γγ → tt → ℓX/bX, using the optimal-observable method.

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“…If new physics is associated with a scale Λ much above the weak scale (∼ M W ), the total Lagrangian density may be written in the form [22] …”

Section: New Physics: Analysismentioning

confidence: 99%