Bubble expansion and the viability of singlet-driven electroweak baryogenesis

Kozaczuk, Jonathan

doi:10.1007/jhep10(2015)135

Cited by 139 publications

(148 citation statements)

References 194 publications

(427 reference statements)

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…In other words, the Universe is in a supercooled state for some time. To calculate the nucleation temperatures T S and T n we used the publicly available CosmoTransitions package [23][24][25][26]. Note that since the effective potential is gauge dependent away from the minima, the calculated T n may have a residual gauge dependence, see e.g.…”

mentioning

confidence: 99%

Dark Matter Decay between Phase Transitions at the Weak Scale

Baker

Kopp

2017

Phys. Rev. Lett.

View full text Add to dashboard Cite

We propose a new alternative to the Weakly Interacting Massive Particle (WIMP) paradigm for dark matter. Rather than being determined by thermal freeze-out, the dark matter abundance in this scenario is set by dark matter decay, which is allowed for a limited amount of time just before the electroweak phase transition. More specifically, we consider fermionic singlet dark matter particles coupled weakly to a scalar mediator S3 and to auxiliary dark sector fields, charged under the Standard Model gauge groups. Dark matter freezes out while still relativistic, so its abundance is initially very large. As the Universe cools down, the scalar mediator develops a vacuum expectation value (vev), which breaks the symmetry that stabilises dark matter. This allows dark matter to mix with charged fermions and decay. During this epoch, the dark matter abundance is reduced to give the value observed today. Later, the SM Higgs field also develops a vev, which feeds back into the S3 potential and restores the dark sector symmetry. In a concrete model we show that this "vev flip-flop" scenario is phenomenologically successful in the most interesting regions of its parameter space. We also comment on detection prospects at the LHC and elsewhere.The WIMP (Weakly Interacting Massive Particle) paradigm in dark matter physics states that dark matter (DM) particles should have non-negligible couplings to Standard Model (SM) particles. Their abundance today would then be determined by their abundance at freeze-out, the time when the temperature of the Universe dropped to the level where interactions producing and annihilating DM particles become inefficient. In many models these interactions should still be observable today, through residual DM annihilation in galaxies and galaxy clusters, through scattering of DM particles on atomic nuclei, or through DM production at colliders. The conspicuous absence of any convincing signals [1][2][3][4][5][6][7] to date motivates us to look for alternatives to the WIMP paradigm.In this letter, we present a scenario in which the DM abundance is set not by annihilation, but by decay. We focus on models in which fermionic DM particles couple to a new scalar species and argue that the resulting scalar potential may undergo multiple phase transitions, "flip-flopping" between phases in which the symmetry stabilising the DM is intact and a phase where it is broken. Similar behaviour is found in models of electroweak baryogenesis [8][9][10][11][12][13][14], see also [15] for related work. During the broken phase, the initially overabundant DM particles are depleted until their relic density reaches the value observed today. Although the resulting picture of early freeze out, followed by a period of DM decay around the weak scale, is quite generic, we focus here on a concrete example and comment on possible generalisations in the end.Model Framework.-We introduce a complex dark sector scalar S 3 that is a triplet under the SM SU (2) L gauge symmetry and carries zero hypercharge. We take the DM particle to...

show abstract

mentioning

confidence: 99%

Dark Matter Decay between Phase Transitions at the Weak Scale

Baker

Kopp

2017

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the idea of electroweak baryogenesis is natural and attractive, and it is known that new physics which couples to the Higgs sector can easily induce a first-order transition [11][12][13][14][15][16][17][18][19][20]. Specific models for this new physics have been proposed, but there is a very large model space and individual models are constrained by Large Hadron Collider (LHC) data and other observables (see for instance [18,19,[21][22][23][24][25]).…”

Section: Jhep02(2016)107mentioning

confidence: 99%

“…Specific models for this new physics have been proposed, but there is a very large model space and individual models are constrained by Large Hadron Collider (LHC) data and other observables (see for instance [18,19,[21][22][23][24][25]). …”

Section: Jhep02(2016)107mentioning

confidence: 99%

See 1 more Smart Citation

Effective field theory and electroweak baryogenesis in the singlet-extended Standard Model

Damgaard

Haarr

O’Connell

et al. 2016

J. High Energ. Phys.

View full text Add to dashboard Cite

Electroweak baryogenesis is a simple and attractive candidate mechanism for generating the observed baryon asymmetry in the Universe. Its viability is sometimes investigated in terms of an effective field theory of the Standard Model involving higher dimension operators. We investigate the validity of such an effective field theory approach to the problem of identifying electroweak phase transitions strong enough for electroweak baryogenesis to be successful. We identify and discuss some pitfalls of this approach due to the modest hierarchy between mass scales of heavy degrees or freedom and the Higgs, and the possibility of dimensionful couplings violating the decoupling between light and heavy degrees of freedom.

show abstract

“…This kind of extension of the SM was discussed in the literature with various motivations, can be found in eg. [23][24][25][26][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Baryogenesis of the universe in cSMCS model plus iso-doublet vector quark

Darvishi

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

CP violation of the SM is insufficient to explain the baryon asymmetry in the universe and therefore an additional source of CP violation is needed. Here the extension of the SM by a neutral complex scalar singlet with a nonzero vacuum expectation value (cSMCS) plus a heavy vector quark pair is considered. This model offers the spontaneous CP violation and proper description in the baryogenesis, it leads strong enough first-order electro-weak phase transition to suppress the baryon-violating sphaleron process.

show abstract

Bubble expansion and the viability of singlet-driven electroweak baryogenesis

Cited by 139 publications

References 194 publications

Dark Matter Decay between Phase Transitions at the Weak Scale

Dark Matter Decay between Phase Transitions at the Weak Scale

Effective field theory and electroweak baryogenesis in the singlet-extended Standard Model

Baryogenesis of the universe in cSMCS model plus iso-doublet vector quark

Contact Info

Product

Resources

About