Electroweak baryogenesis in the $$ {\mathbb{Z}}_3 $$-invariant NMSSM

Akula, Sujeet; Balázs, Csaba; Dunn, Liam; White, Graham

doi:10.1007/jhep11(2017)051

Cited by 25 publications

(22 citation statements)

References 112 publications

(155 reference statements)

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“…This mixing changes the properties of the Higgs bosons like their masses and couplings to the SM fields. An interesting possibility of the CP-violated NMSSM is the electroweak baryogenesis (EWBG) [145]-in the NMSSM, a strong first-order phase transition might have occurred in the early universe, and the extra CP-violating sources in the NMSSM scalar potential may bring in the successful EWBG [146][147][148][149][150][151][152][153]. Such CP-violating sources can be probed [154] with the measurement of the electric dipole moments (EDMs) of electron, neutron, atoms, and so on.…”

Section: Summary and Discussionmentioning

confidence: 99%

Non-universal gaugino masses in the NMSSM

Kawamura

Kobayashi

2018

J. High Energ. Phys.

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The Next-to-Minimal Supersymmetric Standard Model (NMSSM) provides a natural framework to realize a low-scale supersymmetric (SUSY) model, where a singlet superfield is added to the minimal model to generate a SUSY-scale higgsino mass term with its vacuum expectation value. Due to the presence of the extra singlet field, the vacuum conditions to realize the correct electroweak symmetrybreaking become fairly restrictive especially if we impose universality conditions at the unification scale. In this paper, we show that a non-universal gaugino mass spectrum can significantly relax this restriction even though the scalar masses and trilinear couplings are subject to universality conditions. With the gaugino nonuniversality, we find that higgsino can be the lightest SUSY particle and its thermal relic abundance can reproduce the observed dark matter density in a wide range of parameter space in which the 125 GeV Higgs-boson mass is obtained. This higgsinolike dark matter may be probed in direct detection experiments. We also find that there is an upper bound on the masses of supersymmetric particles in this scenario, and many model points predict colored particles such as gluino to be within the reach of a future 100 TeV collider. Implications for no-scale/gaugino-mediation models are also discussed. *

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Section: Summary and Discussionmentioning

confidence: 99%

Non-universal gaugino masses in the NMSSM

Kawamura

Kobayashi

2018

J. High Energ. Phys.

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“…Such a scenario requires new weak scale physics to catalyze the electroweak phase transition (EWPT). This has been studied in detail for example in the minimal supersymmetric standard model (MSSM) [7][8][9][10][11][12][13], the next-to-MSSM [13][14][15][16][17][18][19][20], as well as a variety of other Beyond the Standard Model (BSM) scenarios including multistep transitions [21][22][23] and effective field theory (EFT) approaches [24][25][26][27][28]. The precise behavior of the bubble nucleation can determine the efficiency of baryon production [24] as well as how quenched electroweak sphalerons are which controls the degree to which the initial baryon yield is washed out [29].…”

Section: Introductionmentioning

confidence: 99%

Bubbleprofiler: Finding the field profile and action for cosmological phase transitions

Athron

Balázs

Bardsley

et al. 2019

Computer Physics Communications

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We present BubbleProfiler, a C++ software package for finding field profiles in bubble walls and calculating the bounce action during phase transitions involving multiple scalar fields. Our code uses a recently proposed perturbative method for potentials with multiple fields and a shooting method for single field cases. BubbleProfiler is constructed with modularity, flexibility and practicality in mind. These principles extend from the input of an arbitrary potential with multiple scalar fields in various forms, through the code structure, to the testing suite. After reviewing the physics context, we describe how the methods are implemented in BubbleProfiler, provide an overview of the code structure and detail usage scenarios. We present a number of examples that serve as test cases of BubbleProfiler and comparisons to existing public codes with similar functionality. We also show a physics application of BubbleProfiler in the scalar singlet extension of the Standard Model of particle physics by calculating the action as a function of model parameters during the electroweak phase transition. BubbleProfiler completes an important link in the toolchain for studying the properties of the thermal phase transition driving baryogenesis and properties of gravitational waves in models with multiple scalar fields. The code can be obtained from: https://github.com/bubbleprofiler/bubbleprofiler. Typical running time: < 1 second for single field potentials, up to O(10) seconds for potentials of several (6+) fields. Nature of problem:Find the field profile in the bubble wall (bounce solution) and Euclidean action for a cosmological phase transition by solving a set of coupled differential equations.Solution method: Direct shooting method for single field problems. Multiple field problems are solved using a perturbative algorithm which linearizes the bounce equations.Restrictions: Currently unable to find bounce solutions for potentials of more than one fields where the vacua are nearly degenerate -these are the so-called "thin walled" cases.

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“…Such a cosmic phase transition leaves behind a striking relic gravitational wave spectrum that depends on the strength of the transition, the speed of the transition, the bubble wall velocity and the temperature of the transition. The electroweak phase transition in particular is of interest since a strongly first order electroweak phase transition can catalyze electroweak baryogenesis [9][10][11][12] providing an explanation for matter anti-matter asymmetry observed today [10,11,[13][14][15][16][17][18]. The phenomenology of such PTs have been studied abundantly [19][20][21][22][23][24][25][26][27][28] and the GW production has recently been advanced theoretically [29] and through lattice simulations [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…Recently there has been much interest in multi-step phase transitions [15,[32][33][34][35][36][37][38]. The electroweak phase transition can occur at a higher scale, if the symmetry breaks through a two step transition [33].…”

Section: Introductionmentioning

confidence: 99%

“…The electroweak phase transition can occur at a higher scale, if the symmetry breaks through a two step transition [33]. Baryogenesis can occur through exotic high temperature color breaking transitions [35] and if a singlet acquires a vev before the electroweak phase transition, it can catalyze a strongly first order electroweak phase transition [39] as well as affecting the amount of baryon asymmetry produced in the NMSSM [15]. Here we will consider the GW signal from multi-step phase transitions, and argue that the phenomenology may be altered if the transitions overlap.…”

Section: Introductionmentioning

confidence: 99%

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Exotic gravitational wave signatures from simultaneous phase transitions

Croon¹,

White²

2018

J. High Energ. Phys.

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We demonstrate that the relic gravitational wave background from a multi-step phase transition may deviate from the simple sum of the single spectra, for phase transitions with similar nucleation temperatures T N . We demonstrate that the temperature range ∆T between the volume fractions f (T ) = 0.1 and f (T ) = 0.9 occupied by the vacuum bubbles can span ∼ 20 GeV. This allows for a situation in which phase transitions overlap, such that the later bubbles may nucleate both in high temperature and intermediate temperature phases. Such scenarios may lead to more exotic gravitational wave spectra, which cannot be fitted that of a consecutive PTs. We demonstrate this explicitly in the singlet extension of the Standard Model. Finally, we comment on potential additional effects due to the more exotic dynamics of overlapping phase transitions.

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Electroweak baryogenesis in the $$ {\mathbb{Z}}_3 $$-invariant NMSSM

Cited by 25 publications

References 112 publications

Non-universal gaugino masses in the NMSSM

Non-universal gaugino masses in the NMSSM

Bubbleprofiler: Finding the field profile and action for cosmological phase transitions

Exotic gravitational wave signatures from simultaneous phase transitions

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