High-quality axions in solutions to the $μ$ problem

Bhattiprolu, Prudhvi N.; Martin, Stephen P.

doi:10.48550/arxiv.2106.14964

Cited by 4 publications

(4 citation statements)

References 83 publications

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“…Finally, several alternative approaches to the quality problem where the axion is a fundamental field have been proposed in the literature; for an incomplete list of works, see for example refs. [32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Chiral models of composite axions and accidental Peccei-Quinn symmetry

Contino

Podo

Revello

2022

J. High Energ. Phys.

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We introduce a class of composite axion models that provide a natural solution to the strong CP problem, and possibly account for the observed dark matter abundance. The QCD axion arises as a composite Nambu-Goldstone boson (NGB) from the dynamics of a chiral gauge theory with a strongly-interacting and confining SU(N) factor and a weakly-interacting U(1), with no fundamental scalar fields. The Peccei-Quinn (PQ) symmetry is accidental and all the mass scales are generated dynamically. We analyze specific models where the PQ symmetry is broken only by operators of dimension 12 or higher. We also classify several other models where the PQ symmetry can be potentially protected up to the dimension 15 or 18 level. Our framework can be easily extended to a scenario where the Standard Model (SM) is unified into a simple gauge group, and we discuss the case of non-supersymmetric SU(5) unification. The GUT models predict the existence of additional pseudo NGBs, parametrically lighter than the GUT and PQ scales, which could have an impact on the cosmological evolution and leave observable signatures. We also clarify the selection rules under which higher-dimensional PQ-violating operators can generate a potential for the axion in the IR, and provide a discussion of the discrete symmetries in composite axion models associated to the number of domain walls. These results can be of general interest for composite axion models based on a QCD-like confining gauge group.

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Section: Introductionmentioning

confidence: 99%

Chiral models of composite axions and accidental Peccei-Quinn symmetry

Contino

Podo

Revello

2022

J. High Energ. Phys.

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“…However, as ZN should be gauged, one needs to care about the mixed anomaly free conditions for ZN , which makes introducing the gauged ZN non-trivial as we will see. 3 Recently the use of discrete R-symmetry for addressing the axion quality problem was discussed in [26,27].…”

Section: Jhep12(2022)067mentioning

confidence: 99%

High quality axion in supersymmetric models

Choi

Yanagida

2022

J. High Energ. Phys.

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In this work, we discuss how the use of the symmetries well motivated in physics beyond the Standard model (BSM) can guarantee the high quality axions. We avoid to introduce symmetries only useful for addressing the axion quality problem. Rather, we rely on symmetries well motivated by other issues in BSM: supersymmetry, U(1)B−L and the discrete R-symmetry ZNR. We show that the interplay among these guarantees the high quality of the axion even for the gravitino mass and axion decay constant as large as m3/2 = $$ \mathcal{O} $$ O (10)TeV and Fa = $$ \mathcal{O} $$ O (1015)GeV respectively. The key point of this work relies on the observation that the MSSM contribution to the mixed anomalies ZNR − [SU(2)L]2 and ZNR − [SU(3)c]2 is not enough for gauging ZNR for N ≠ 6, which necessitates the introduction of new matter fields. We make the introduction to achieve zero mixed anomalies, which logically supports a desired large enough N for ZNR. This mechanism effectively makes ZNR equal to U(1)R and thus offers a logically complete solution to the axion quality problem.

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“…[92], two SUSY DFSZ axion models based on a Z R 24 discrete symmetry were presented (see also Ref's. [93] and [94]). In these models, the U (1) P Q emerges as an accidental, approximate global symmetry as a consequence of the more fundamental discrete R-symmetry.…”

Section: Introductionmentioning

confidence: 99%

Dark matter and dark radiation from the early universe with a modulus coupled to the PQMSSM

Baer¹,

Barger²,

Deal³

2023

Preprint

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The supersymmetrized DFSZ axion model is especially compelling in that it contains 1. the SUSY solution to the gauge hierarchy problem, 2. the Peccei-Quinn (PQ) solution to the strong CP problem and 3. the Kim-Nilles solution to the SUSY µ problem. In a string setting, where a discrete R-symmetry (Z R 24 for example) may emerge from the compactification process, a high-quality accidental axion (accion) can emerge from the accidental, approximate remnant global U (1) P Q symmetry where the decay constant f a is linked to the SUSY breaking scale, and is within the cosmological sweet zone. In this setup, one also expects the presence of stringy remnant moduli fields φ i . Here, we consider the situation of a single light modulus φ coupled to the PQMSSM in the early universe, with mixed axion plus higgsino-like WIMP dark matter. We evaluate dark matter and dark radiation production via nine coupled Boltzmann equations and assess the severity of the cosmological moduli problem (CMP) along with dark matter and dark radiation production rates. We find that typically the light modulus mass should be m φ 10 4 TeV to avoid the moduli-induced dark matter overproduction problem. If one is able to (anthropically) tune the modulus field amplitude, we find a value of φ 0 10 −7 m P would be required to solve the overall CMP.

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High-quality axions in solutions to the $μ$ problem

Cited by 4 publications

References 83 publications

Chiral models of composite axions and accidental Peccei-Quinn symmetry

Chiral models of composite axions and accidental Peccei-Quinn symmetry

High quality axion in supersymmetric models

Dark matter and dark radiation from the early universe with a modulus coupled to the PQMSSM

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