Sliding Naturalness: Cosmological Selection of the Weak Scale

D'Agnolo, Raffaele Tito; Teresi, Daniele

doi:10.48550/arxiv.2109.13249

Cited by 9 publications

(9 citation statements)

References 96 publications

(212 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Refs. [1598,1643], only a small weak scale bounded from above and below can survive on sufficiently long cosmological timescales after reheating due to a metastable vacuum disappearing and the patch of the universe crunching for other values of the weak scale.…”

Section: Dark Matter Candidatesmentioning

confidence: 99%

Early-Universe Model Building

Asadi,

Bansal,

Berlin

et al. 2022

Preprint

View full text Add to dashboard Cite

Section: Dark Matter Candidatesmentioning

confidence: 99%

Early-Universe Model Building

Asadi,

Bansal,

Berlin

et al. 2022

Preprint

View full text Add to dashboard Cite

“…In the case of Sleptonic SUSY the anthropic dangers are arguably more clear-cut. There are other frameworks in the literature in which there are dramatic transitions in the BSM physics that are very sensitive to the weak scale, which then can strongly affect the naturalness considerations [90][91][92][93][94][95]. However, each of these has a somewhat different character from the sense of "living dangerously" in Sleptonic SUSY.…”

Section: Jhep09(2022)142mentioning

confidence: 99%

Sleptonic SUSY: from UV framework to IR phenomenology

Agashe

Ekhterachian

Liu

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We study an attractive scenario, “Sleptonic SUSY”, which reconciles the 125 GeV Higgs scalar and the non-observation of superpartners thus far with potentially pivotal roles for slepton phenomenology: providing viable ongoing targets for LHC discovery, incorporating a co-annihilation partner for detectable thermal relic dark matter, and capable of mediating the potential muon g − 2 anomaly. This is accomplished by a modestly hierarchical spectrum, with sub-TeV sleptons and electroweakinos and with multi-TeV masses for the other new states. We study new elements in the UV MSSM realization of Sleptonic SUSY based on higher-dimensional sequestering and the synergy between the resulting gaugino-mediation, hypercharge D-term mediation and Higgs-mediation of SUSY-breaking, so as to more fully capture the range of possibilities. This framework stands out by harmoniously solving the flavor, CP and μ − Bμ problems of the supersymmetric paradigm. We discuss its extension to orbifold GUTs, including gauge-coupling and b-tau unification. We also develop a non-minimal model with extra Higgs fields, in which the electroweak vacuum is more readily cosmologically stable against decay to a charge-breaking vacuum, allowing a broader range of sleptonic spectra than in the MSSM alone. We survey the rich set of signals possible at the LHC and future colliders, covering both R-parity conservation and violation, as well as for dark matter detection. While the multi-TeV squarks imply a Little Hierarchy Problem, intriguingly, small changes in parameter space to improve naturalness result in dramatic phase transitions to either electroweak-preservation or charge-breaking. In a Multiverse setting, the modest unnaturalness may then be explained by the “principle of living dangerously”.

show abstract

“…7 Note that this vacuum is problematic cosmologically, since the cosmological constant is large and negative in this vacuum, the entire Universe would crunch (see e.g. [40][41][42]). It is difficult to imagine QCD in the real world would live in this vacuum.…”

Section: Jhep08(2022)016mentioning

confidence: 99%

“…Phenomenologically, if SUSY is part of reality of the QCD sector (rather than just being a theoretical tool for controlling the strong dynamics), we might be able to understand why SUSY is so badly broken following the cosmological crunching idea [40][41][42]. One can imagine there is a "multiverse" (i.e.…”

Section: Jhep08(2022)016mentioning

confidence: 99%

On the derivation of chiral symmetry breaking in QCD-like theories and S-confining theories

Luzio

Ling-Xiao

2022

J. High Energ. Phys.

View full text Add to dashboard Cite

Recent works argue that the pattern of chiral symmetry breaking in QCD-like theories can be derived from supersymmetric (SUSY) QCD with perturbation of anomaly-mediated SUSY breaking (AMSB). Nevertheless, despite the fact that AMSB needs to be a small (but still exact) perturbation, two other major problems remain unsolved: first, in order to derive the chiral symmetry breaking pattern, one needs to minimize the potential along a certain specific direction, identifying this direction fully as an outcome is nontrivial given the moduli space of degenerate vacua in the SUSY limit; second, when SUSY is broken, non-holomorphic states might emerge and be relevant for determining the vacuum structure. In this work, we try to resolve these problems and discuss their physical implica- tions. For this purpose, we focus on SUSY QCD with Nf ≤ Nc + 1 and perturb the theories using AMSB. Without minimizing the potential along a certain specific direction in the moduli space, we successfully derive the expected chiral symmetry breaking pattern when Nf< Nc. However, when Nf = Nc and Nf = Nc + 1, we show that tree-level AMSB would induce runaway directions, along which baryon number is spontaneously broken, and the vacua with broken baryon number can be deeper while the field values are not far from the origin. This implies that phase transitions and/or non-holomorphic physics are necessary. In order to derive the expected chiral symmetry breaking pattern of non-SUSY QCD starting from the SUSY limit and AMSB, baryon number conservation is needed as an input rather than obtained as an output. Moreover, we perform explicit consistency checks on “ultraviolet insensitivity” for different Nf by adding the holomorphic mass term for the last flavor, we find that the “jump” of AMSB potential indeed matches the contribution from the holomorphic mass term. We also show in general that, when tree-level AMSB is not vanishing, the origin of the moduli space in s-confining theories does not persist as a minimum.

show abstract

Sliding Naturalness: Cosmological Selection of the Weak Scale

Cited by 9 publications

References 96 publications

Early-Universe Model Building

Early-Universe Model Building

Sleptonic SUSY: from UV framework to IR phenomenology

On the derivation of chiral symmetry breaking in QCD-like theories and S-confining theories

Contact Info

Product

Resources

About