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Muon Magnetic Moment and the Goldstone Boson Higgs · Around

2014

Muon Magnetic Moment and the Goldstone Boson Higgs

Antipin, Oleg, De Curtis, Stefania, Redi, Michele et al.

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We compute the correction to the muon magnetic moment in theories where the Higgs is a pseudo-Goldstone boson and leptons are partially composite.

Using a general effective lagrangian we show that in some regions of parameters a sizable new physics contribution to the magnetic moment can be obtained from composite fermions that could explain the 3.5$\sigma$ experimental discrepancy from the Standard Model prediction.
This effect depends on the derivative interactions of the Higgs that do not modify the coupling of the Higgs to leptons and it does not require extremely light fermions, allowing to easily avoid LHC bounds.
Our derivations can be in general applied to dipole operators in theories with Goldstone boson Higgs.

Built on

S. R. Coleman, J. Wess, and B. Zumino, �Structure of phenomenological Lagrangians. 1.,� Phys.Rev. 177 (1969) 2239�2247; J. Callan, Curtis G., S. R. Coleman, J. Wess, and B. Zumino, �Structure of phenomenological Lagrangians. 2.,� Phys.Rev. 177 (1969) 2247�2250
1969
Earlier work this paper cites.
L. S. Geng, J. Martin Camalich, L. Alvarez-Ruso and M. J. Vicente Vacas, “Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory,” Phys. Rev. Lett. 101
Original
2008
Earlier work this paper cites.
J. Mrazek, A. Pomarol, R. Rattazzi, M. Redi, J. Serra and A. Wulzer, “The Other Natural Two Higgs Doublet Model,” Nucl. Phys. B 853
Original
2011
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M. Redi and A. Weiler, “Flavor and CP Invariant Composite Higgs Models,” JHEP 1111
Original
2011
Earlier work this paper cites.
K. Kannike, M. Raidal, D. M. Straub and A. Strumia, “Anthropic solution to the magnetic muon anomaly: the charged see-saw,” JHEP 1202
Original
2012
Earlier work this paper cites.

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Original

2013

Cited alongside, same era.

R. Contino, “The Higgs as a Composite Nambu-Goldstone Boson,” arXiv:1005.4269 [hep-ph]

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M. König, M. Neubert and D. M. Straub, “Dipole operator constraints on composite Higgs models,” arXiv:1403.2756 [hep-ph]

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