Expectations for the muon g-2 in simplified models with dark matter

被引：87

作者：

Kowalska, Kamila ^{[1
]}

Sessolo, Enrico Maria ^{[1
,2
]}

机构：

[1] Tech Univ Dortmund, Inst Phys, Otto Hahn Str 4, D-44221 Dortmund, Germany

[2] Natl Ctr Nucl Res, Hoza 69, PL-00681 Warsaw, Poland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2017年 / 09期

关键词：

Phenomenological Models; ANOMALOUS MAGNETIC-MOMENT; RELIC DENSITY; PHYSICS; SUPERGRAVITY; CONSTRAINTS; PROGRAM; FLAVOR; SPHENO; ENERGY; MASSES;

D O I：

10.1007/JHEP09(2017)112

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate simpli fied models of new physics that can accommodate the measured value of the anomalous magnetic moment of the muon and the relic density of dark matter. We de fi ne a set of renormalizable, SU(2) x U(1) invariant extensions of the Standard Model, each comprising an inert Z(2)-odd scalar fi eld and one or more vector-like pairs of colorless fermions that communicate to the muons through Yukawa-type interactions. The new sectors are classi fied according to their transformation properties under the Standard Model gauge group and all models are systematically confronted with a variety of experimental constraints: LEP mass bounds, direct LHC searches, electroweak precision observables, and direct searches for dark matter. We show that scenarios featuring only one type of new fermions become very predictive once the relic density and collider constraints are taken into account, as in this case (g - 2)(mu) is not enhanced by chirality flip. Conversely, for models where an additional source of chiral-symmetry violation is generated via fermion mixing, the constraints are much looser and new precision experiments with highly suppressed systematic uncertainties may be required to test the parameter space.

引用

页数：37

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