Stueckelberg<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Z</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math>extension with kinetic mixing and millicharged dark matter from the hidden sector

Feldman, Daniel; Liu, Zuowei; Nath, Pran

doi:10.1103/physrevd.75.115001

Cited by 313 publications

(271 citation statements)

References 65 publications

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“…The multiplet contributes to the supersymmetric version of the Stückelberg mechanism [14] and in the WZ interaction that describes the coupling of the supermultiplet to the gauge supermultiplet. We recall that in anomaly-free theories the Stückelberg mechanism has the feature of contributing to the mass of the anomalous gauge boson, eventually also in combination with the Higgs sector [25,26]. This construction holds both in the non-supersymmetric and in the supersymmetric case.…”

Section: The Stückelberg Multipletmentioning

confidence: 99%

Light supersymmetric axion in an anomalous Abelian extension of the standard model

et al. 2009

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We present a supersymmetric extension of the Standard Model (USSM-A) with an anomalous U (1) and Stückelberg axions for anomaly cancellation, generalizing similar non-supersymmetric constructions. The model, built by a bottom-up approach, is expected to capture the low-energy supersymmetric description of axionic symmetries in theories with gauged anomalous abelian interactions, previously explored in the non-supersymmetric case for scenarios with intersecting branes. The choice of a USSM-like superpotential, with one extra singlet superfield and an extra abelian symmetry, allows a physical axion-like particle in the spectrum. We describe some general features of this construction and in particular the modification of the dark-matter sector which involves both the axion and several neutralinos with an axino component. The axion is expected to be very light in the absence of phases in the superpotential but could acquire a mass which can also be in the few GeV range or larger. In particular, the gauging of the anomalous symmetry allows independent mass/coupling interaction to the gauge fields of this particle, a feature which is absent in traditional (invisible) axion models. We comment on the general implications of our study for the signature of moduli from string theory due to the presence of these anomalous symmetries.

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Section: The Stückelberg Multipletmentioning

confidence: 99%

Light supersymmetric axion in an anomalous Abelian extension of the standard model

et al. 2009

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“…A generalisation of the Green-Schwarz mechanism disposes of anomalies. In particular in the string-inspired extension of the (MS)SM under consideration, new vector bosons Z appear that get a mass via a Stückelberg mechanism [50][51][52][53] and interact through generalized Chern-Simon (GCS) terms, in such a way as to cancel all anomalies [22,[54][55][56]. 3 If the relevant D-brane stacks intersect four rather than three times, i.e.…”

Section: Jhep07(2015)144mentioning

confidence: 99%

Un-oriented quiver theories for Majorana neutrons

Addazi

Bianchi

2015

J. High Energ. Phys.

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In the context of un-oriented open string theories, we identify quivers whereby a Majorana mass for the neutron is indirectly generated by exotic instantons. We discuss two classes of (Susy) Standard Model like quivers, depending on the embedding of SU(2) W in the Chan-Paton group. In both cases, the main mechanism involves a vector-like pair mixing through a non-perturbative mass term. We also discuss possible relations between the phenomenology of Neutron-Antineutron oscillations and LHC physics in these models. In particular, a vector-like pair of color-triplet scalars or color-triplet fermions could be directly detected at LHC, compatibly with n −n limits. Finally we briefly comment on Pati-Salam extensions of our models.

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“…The φ angle is constrained by the measurement of the Z width from LEP, sin φ ≤ 0.04 [36]. This decreases the bound of eq.…”

Section: Jhep08(2014)133mentioning

confidence: 99%

Can a millicharged dark matter particle emit an observable γ-ray line?

Aisati

Hambye

Scarna

2014

J. High Energ. Phys.

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If a γ-ray line is observed in the near future, it will be important to determine what kind of dark matter (DM) particle could be at its origin. We investigate the possibility that the γ-ray line would be induced by a slow DM particle decay associated to the fact that the DM particle would not be absolutely neutral. A "millicharge" for the DM particle can be induced in various ways, in particular from a kinetic mixing interaction or through the Stueckelberg mechanism. We show that such a scenario could lead in specific cases to an observable γ-ray line. This possibility can be considered in a systematic modelindependent way, by writing down the corresponding effective theory. This allows for a multi-channel analysis, giving in particular upper bounds on the intensity of the associated γ-ray line from cosmic rays emission. Our analysis includes the possibility that in the twobody decay the photon is accompanied with a neutrino. We show that, given the stringent constraints which hold on the millicharge of the neutrinos, this is not an option, except if the DM particle mass lies in the very light KeV-MeV range, allowing for a possibility of explanation of the recently claimed, yet to be confirmed, ∼ 3.5 KeV X-ray line.

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StueckelbergZ′extension with kinetic mixing and millicharged dark matter from the hidden sector

Cited by 313 publications

References 65 publications

Light supersymmetric axion in an anomalous Abelian extension of the standard model

Light supersymmetric axion in an anomalous Abelian extension of the standard model

Un-oriented quiver theories for Majorana neutrons

Can a millicharged dark matter particle emit an observable γ-ray line?

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