Stable Z-strings with topological polarization in two Higgs doublet model

Eto, Minoru; Hamada, Yu; Nitta, Muneto

doi:10.1007/jhep02(2022)099

Cited by 11 publications

(3 citation statements)

References 128 publications

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“…It would be also interesting to apply our approach, with certain, perhaps serious, modifications, to the actively developing holographic Higgs sector it is not excluded that the condition for the creation of quark-antiquark states that we used might have a counterpart for the creation of fermionantifermion pairs from the Higgs field and this could be exploited for a holographic prediction, e.g., of the Higgs mass. Also our approach could find applications in studies of the Z-string stability in the two Higgs doublet extension of the Standard Model [32].…”

Section: Discussionmentioning

confidence: 99%

Gluon string breaking and meson spectrum in the holographic Soft Wall model

Afonin,

Solomko

2021

Preprint

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We propose a general method for finding a string-like meson spectrum which is based on a certain condition for the breaking of closed gluon string. A model is constructed that successfully realizes the proposed method. The model is based on the holographic Soft Wall model for QCD and the use of the Wilson confinement criterion. We applied our approach to the vector and scalar cases and obtained numerical predictions for the intercepts of corresponding Regge like radial meson spectra. A good agreement is obtained both with the existing experimental data and with some other known phenomenological approaches. Remarkably, our closed string breaking condition has two branches. We argue that they should correspond to states of opposite parity. The Wilson confinement criterion leads then to a natural mass splitting between parity partners. The constructed model represents thus the first example of bottom-up holographic model in which the effects of chiral symmetry breaking emerge automatically, i.e., without any ad hoc constructions based on the standard preconceived ideas from the chiral perturbation theory or the quark model.

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Section: Discussionmentioning

confidence: 99%

Gluon string breaking and meson spectrum in the holographic Soft Wall model

Afonin,

Solomko

2021

Preprint

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“…If the number is two, the composite is stable. On the other hand, a single Z-string can be decomposed into a pair of two non-Abelian fractional Z-strings connected by one (or two) domain wall(s), constituting a vortex molecule [115].…”

Section: Two-higgs Doublet Models (2hdmsmentioning

confidence: 99%

Composite topological solitons consisting of domain walls, strings, and monopoles in O(N) models

Eto,

Hamada,

Nitta

2023

J. High Energ. Phys.

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We study various composites of global solitons consisting of domain walls, strings, and monopoles in linear O(N) models with N = 2 and 3. Spontaneous symmetry breaking (SSB) of the O(N) symmetry down to O(N – 1) results in the vacuum manifold SN−1, together with a perturbed scalar potential in the presence of a small explicit symmetry breaking (ESB) interaction. The O(2) model is equivalent to the axion model admitting topological global (axion) strings attached by NDW domain walls. We point out for the NDW = 2 case that the topological stability of the string with two domain walls is ensured by sequential SSBs (ℤ2)2 → ℤ2 → 1, where the first SSB occurs in the vacuum leading to the topological domain wall as a mother soliton, only inside which the second SSB occurs giving rise to a subsequent kink inside the mother wall. From the bulk viewpoint, this kink is identical to a global string as a daughter soliton. This observation can be naturally ex- tended to the O(3) model, where a global monopole as a daughter soliton appears as a kink in a mother string or as a vortex on a mother domain wall, depending on ESB interactions. In the most generic case, the stability of the composite system consisting of the monopole, string, and domain wall is understood by the SSB (ℤ2)3 → (ℤ2)2 → ℤ2 → 1, in which the first SSB at the vacuum gives rise to the domain wall triggering the second one, so that the daughter string appears as a domain wall inside the mother wall triggering the third SSB, which leads to a granddaughter monopole as a kink inside the daughter vortex. We demonstrate numerical simulations for the dynamical evolution of the composite solitons.

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“…A molecule of half-quantized vortices connected by a soliton or domain wall can be found in various systems such as multicomponent or multigap superconductors [94][95][96][97][98][99][100][101][102][103][104][105][106], coherently coupled multicomponent BECs [107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122], dense QCD of quark matter [123], and the two-Higgs doublet model [124] as a model beyond the standard model of elementary particles. Compared with these systems, the unique feature of 3 P 2 superfluids is that constituent half-quantized vortices are non-Abelian vortices, that is, characterized by a non-Abelian first homotopy group.…”

Section: Introductionmentioning

confidence: 99%

Core structures of vortices in Ginzburg-Landau theory for neutron $^3P_2$ superfluids

Kobayashi,

Nitta

2022

Preprint

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We investigate vortex solutions in the Ginzburg-Landau theory for neutron 3 P2 superfluids relevant for neutron star cores in which neutron pairs possess the total angular momentum J = 2 with spin-triplet and P wave, in the presence of the magnetic field parallel to the angular momentum of vortices. The ground state is known to be in the uniaxial nematic (UN) phase in the absence of magnetic field, while it is in the D2 (D4) biaxial nematic (BN) phase in the presence of the magnetic field below (above) the critical value. We find that a singly quantized vortex always splits into two half-quantized non-Abelian vortices connected by soliton(s) as a vortex molecule with any strength of the magnetic field. In the UN phase, two half-quantized vortices with ferromagnetic cores are connected by a linear soliton with the D4 BN order. In the D2 (D4) BN phase, two half-quantized vortices with cyclic cores are connected by three linear solitons with the D4 (D2) BN order. The energy of the vortex molecule monotonically increases and the distance between the two half-quantized vortices decreases with the magnetic field increases, except for a discontinuously increasing jump of the distance at the critical magnetic field. We also construct an isolated half-quantized non-Abelian vortex in the D4 BN phase.

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Stable Z-strings with topological polarization in two Higgs doublet model

Cited by 11 publications

References 128 publications

Gluon string breaking and meson spectrum in the holographic Soft Wall model

Gluon string breaking and meson spectrum in the holographic Soft Wall model

Composite topological solitons consisting of domain walls, strings, and monopoles in O(N) models

Core structures of vortices in Ginzburg-Landau theory for neutron $^3P_2$ superfluids

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