Neutrino charge radius in the minimal supersymmetric standard model

Ng, Ka Lok

doi:10.1007/bf01558299

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…[18]. On the other hand, our result is of the same order of magnitude than the new physics contribution derived in the context of the minimal supersymmetric standard model [67].…”

Section: The Neutrino Charge Radiussupporting

confidence: 69%

Effects of physics beyond the standard model on the neutrino charge radius: An effective Lagrangian approach

et al. 2008

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In this work, we look for possible new physics effects on the electromagnetic charge and anapole form factors, fQ(q 2 ) and fA(q 2 ), for a massless Dirac neutrino, when these quantities are calculated in the context of an effective electroweak Yang-Mills theory, which induces the most general SUL(2)invariant Lorentz tensor structure of nonrenormalizable type for the W W γ vertex. It is found that in this context, besides the standard model contribution, the additional contribution to fQ(q 2 ) and fA(q 2 ) (f O W Q (q 2 ) and f O W A (q 2 ), respectively) are gauge independent and finite functions of q 2 after adopting a renormalization scheme. These form factors, f O W

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“…[18]. On the other hand, our result is of the same order of magnitude than the new physics contribution derived in the context of the minimal supersymmetric standard model [67].…”

Section: The Neutrino Charge Radiussupporting

confidence: 69%

Effects of physics beyond the standard model on the neutrino charge radius: An effective Lagrangian approach

et al. 2008

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“…In particular, even though in the static limit of zero momentum transfer, q 2 → 0, the form-factor F 1 (q 2 , ξ) becomes independent of ξ, its first derivative with respect to q 2 , which corresponds to the classic definition of the NCR, namely r 2 ν = − 6 ∂F 1 (q 2 ,ξ) ∂q 2 | q 2 =0 , continues to depend on it. The problems associated with the definition of the NCR within the SM and beyond have been examined in detail in a series of papers, and various proposals have been put forth on how to bypass them [5,6,7,8,9,10,11,12,13,14,15,16]. The main idea behind these works has been to exploit judiciously the GFP-independence of the entire physical amplitude, and eventually define a piece of it which is kinematically akin to an electromagnetic form factor, and is in addition endowed with a set of important physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…| q 2 =0 , continues to depend on it. The problems associated with the definition of the NCR within the SM and beyond have been examined in detail in a series of papers, and various proposals have been put forth on how to bypass them [5,6,7,8,9,10,11,12,13,14,15,16]. The main idea behind these works has been to exploit judiciously the GFP-independence of the entire physical amplitude, and eventually define a piece of it which is kinematically akin to an electromagnetic form factor, and is in addition endowed with a set of important physical properties.…”

Section: Introductionmentioning

confidence: 99%

Charge radius of the neutrino

et al. 2000

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Using the pinch technique we construct at one-loop order a neutrino charge radius, which is finite, depends neither on the gauge-fixing parameter nor on the gauge-fixing scheme employed, and is process-independent. This definition stems solely from an effective proper photon-neutrino one-loop vertex, with no reference to box or self-energy contributions. The rôle of the W W box in this construction is critically examined. In particular it is shown that the exclusion of the effective W W box from the definition of the neutrino charge radius is not a matter of convention but is in fact dynamically realized when the target-fermions are right-handedly polarized. In this way we obtain a unique decomposition of effective self-energies, vertices, and boxes, which separately respect electroweak gauge invariance. We elaborate on the tree-level origin of the mechanism which enforces at one-loop level massive cancellations among the longitudinal momenta appearing in the Feynman diagrams, and in particular those associated with the non-abelian character of the theory. Various issues related to the known connection between the pinch technique and the Background Field Method are further clarified. Explicit closed expressions for the neutrino charge radius are reported.

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Radiative correction of the neutrino charge radius

1994

Nuov Cim A

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Neutrino charge radius in the minimal supersymmetric standard model

Cited by 5 publications

References 19 publications

Effects of physics beyond the standard model on the neutrino charge radius: An effective Lagrangian approach

Effects of physics beyond the standard model on the neutrino charge radius: An effective Lagrangian approach

Charge radius of the neutrino

Radiative correction of the neutrino charge radius

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