Muon anomalous magnetic moment due to the brane stretching effect

Sawa, Konosuke

doi:10.1103/physrevd.73.025010

Cited by 4 publications

(2 citation statements)

References 73 publications

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“…However, it is possible to regard the classical field π a as the brane stretching effect at low energy. 20…”

Section: Brane Fluctuationsmentioning

confidence: 99%

“…However, it is possible to regard the classical field π a as the brane stretching effect at low energy. 20) The existence of a brane separates bulk space-time into a 4-dimensional Minkowski space-time and an n-dimensional extra space. Static brane fluctuations allow extra dimensional coordinate Y m to acquire x i (i = 1, 2, 3) dependence through the parametrization (3 .…”

Section: §1 Introductionmentioning

confidence: 99%

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Similarity of the Gravitational Contributions to Anomalous Magnetic Moment

Sawa

2006

Progress of Theoretical Physics

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A precise measurement of a muon (g−2) experiment recently reported a deviation from the Standard Model. This implies the need to an extension of the model and suggests underlying mechanisms. We hypothesize that the influence of higher dimensional gravity causes this (g − 2) deviation. This effect would appear as Kaluza-Klein modes and Nambu-Goldstone modes on a 3-brane. These classical effects produce new contributions to the magnetic moment. In this paper, we perform a consistency check by comparing the results derived from the Born and Schrödinger approximations. This comparison reveals a similarity between KK-dilaton modes and the brane stretching effect.

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“…However, it is possible to regard the classical field π a as the brane stretching effect at low energy. 20…”

Section: Brane Fluctuationsmentioning

confidence: 99%

Section: §1 Introductionmentioning

confidence: 99%

Similarity of the Gravitational Contributions to Anomalous Magnetic Moment

Sawa

2006

Progress of Theoretical Physics

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New physics explanations of aμ in light of the FNAL muon g − 2 measurement

Athron

Balázs

Jacob

et al. 2021

J. High Energ. Phys.

216

105

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The Fermilab Muon g −2 experiment recently reported its first measurement of the anomalous magnetic moment $$ {a}_{\mu}^{\mathrm{FNAL}} $$ a μ FNAL , which is in full agreement with the previous BNL measurement and pushes the world average deviation $$ \Delta {a}_{\mu}^{2021} $$ ∆ a μ 2021 from the Standard Model to a significance of 4.2σ. Here we provide an extensive survey of its impact on beyond the Standard Model physics. We use state-of-the-art calculations and a sophisticated set of tools to make predictions for aμ, dark matter and LHC searches in a wide range of simple models with up to three new fields, that represent some of the few ways that large ∆aμ can be explained. In addition for the particularly well motivated Minimal Supersymmetric Standard Model, we exhaustively cover the scenarios where large ∆aμ can be explained while simultaneously satisfying all relevant data from other experiments. Generally, the aμ result can only be explained by rather small masses and/or large couplings and enhanced chirality flips, which can lead to conflicts with limits from LHC and dark matter experiments. Our results show that the new measurement excludes a large number of models and provides crucial constraints on others. Two-Higgs doublet and leptoquark models provide viable explanations of aμ only in specific versions and in specific parameter ranges. Among all models with up to three fields, only models with chirality enhancements can accommodate aμ and dark matter simultaneously. The MSSM can simultaneously explain aμ and dark matter for Bino-like LSP in several coannihilation regions. Allowing under abundance of the dark matter relic density, the Higgsino- and particularly Wino-like LSP scenarios become promising explanations of the aμ result.

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Branon radiative corrections to collider physics and precision observables

2006

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In the context of brane-world scenarios, we study the effects produced by the exchange of virtual massive branons. A one-loop calculation is performed which generates higher-dimensional operators involving SM fields suppressed by powers of the brane tension scale. We discuss constraints on this scenario from colliders such as HERA, LEP and Tevatron and prospects for future detections at LHC or ILC. The most interesting phenomenology comes from new four-particles vertices induced by branon radiative corrections, mainly from four-fermion interactions. The presence of flexible branes modifies also the muon anomalous magnetic moment and the electroweak precision observables.

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Muon anomalous magnetic moment due to the brane stretching effect

Cited by 4 publications

References 73 publications

Similarity of the Gravitational Contributions to Anomalous Magnetic Moment

Similarity of the Gravitational Contributions to Anomalous Magnetic Moment

New physics explanations of aμ in light of the FNAL muon g − 2 measurement

Branon radiative corrections to collider physics and precision observables

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