scholarly journals Higgsless Gauge Symmetry Breaking with a Large Mass Hierarchy

2004 ◽  
Vol 112 (4) ◽  
pp. 629-638 ◽  
Author(s):  
T. Nagasawa ◽  
M. Sakamoto
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Large Mass ◽  
Mass Hierarchy

scholarly journals A multi-component SIMP model with U(1)X → Z2 × Z3

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Soo-Min Choi ◽  
Jinsu Kim ◽  
Pyungwon Ko ◽  
Jinmian Li
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Mass Difference ◽  
Massive Particle ◽  
Large Mass ◽  
Small Mass ◽  
Dark Matter Candidate ◽  
Mass Hierarchy ◽  
New Class ◽  
Matter Fields

Abstract Multi-component dark matter scenarios are studied in the model with U(1)X dark gauge symmetry that is broken into its product subgroup Z2 × Z3 á la Krauss-Wilczek mechanism. In this setup, there exist two types of dark matter fields, X and Y, distinguished by different Z2 × Z3 charges. The real and imaginary parts of the Z2-charged field, XR and XI, get different masses from the U(1)X symmetry breaking. The field Y, which is another dark matter candidate due to the unbroken Z3 symmetry, belongs to the Strongly Interacting Massive Particle (SIMP)-type dark matter. Both XI and XR may contribute to Y’s 3 → 2 annihilation processes, opening a new class of SIMP models with a local dark gauge symmetry. Depending on the mass difference between XI and XR, we have either two-component or three-component dark matter scenarios. In particular two- or three-component SIMP scenarios can be realised not only for small mass difference between X and Y, but also for large mass hierarchy between them, which is a new and unique feature of the present model. We consider both theoretical and experimental constraints, and present four case studies of the multi-component dark matter scenarios.

Deviations from unitary symmetry for resonant states

1965 ◽  
Vol 288 (1413) ◽  
pp. 183-199 ◽  
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Large Mass ◽  
Strong Interactions ◽  
Tensor Form ◽  
Spin Parity ◽  
Unitary Symmetry ◽  
Resonant States ◽  
Charge Independence ◽  
Unitary Tensor

1. The symmetry breaking interactions The fact that the meson or baryon states observed to have a particular spin-parity value appear grouped into unitary patterns of charge multiplets has made it apparent that the strong nuclear interactions satisfy SU 3 symmetry . At the same time, the large mass differences which exist between the charge multiplets constituting a given unitary multiplet show clearly that there also exist moderately strong interactions which do not have this symmetry, although they satisfy the SU 2 symmetry of charge independence and the gauge symmetry of hypercharge conservation. The simplest hypothesis possible for these symmetry breaking interactions is that they have the following unitary tensor form: L m . s . = λ T 3 3 .

scholarly journals Many-body Majorana-like zero modes without gauge symmetry breaking

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
V. Vadimov ◽  
T. Hyart ◽  
J. L. Lado ◽  
M. Möttönen ◽  
T. Ala-Nissila
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Many Body ◽  
Zero Modes

scholarly journals ANOMALOUS U(1)A AND ELECTROWEAK SYMMETRY BREAKING

2001 ◽  
Vol 16 (13) ◽  
pp. 835-844
Author(s):  
ILIA GOGOLADZE ◽  
MIRIAN TSULAIA
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Supersymmetric Standard Model ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Superstring Theory

We suggest a new mechanism for electroweak symmetry breaking in the supersymmetric Standard Model. Our suggestion is based on the presence of an anomalous U (1)A gauge symmetry, which naturally arises in the four-dimensional superstring theory, and heavily relies on the value of the corresponding Fayet–Illiopoulos ξ-term.

scholarly journals DYNAMICAL SYMMETRY BREAKING IN A MINIMAL 3-3-1 MODEL

2012 ◽  
Vol 27 (26) ◽  
pp. 1250156 ◽  
Author(s):  
A. DOFF ◽  
A. A. NATALE
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Dynamical Symmetry ◽  
Mass Scale ◽  
Coupling Constant ◽  
Walking Behavior ◽  
Dynamical Symmetry Breaking ◽  
Dynamical Generation ◽  
Breaking Scale

The gauge symmetry breaking in some versions of 3-3-1 models can be implemented dynamically because at the scale of a few TeVs the U(1)X coupling constant becomes strong. In this work, we consider the dynamical symmetry breaking in a minimal SU(3) TC × SU(3)L × U(1)X model, where we propose a new scheme to cancel the chiral anomalies, including two-index symmetric (6) technifermions, which incorporates naturally the walking behavior in the Technicolor (TC) sector. The composite scalar content of the model is minimal and all the symmetry breaking is implemented by a multiplet of technifermions. The choice of TC representations not only provides the anomaly cancelation with a walking behavior, but is crucial to promote the model's full dynamical symmetry breaking. We consider the dynamical generation of technigluon masses and, depending on the 3-3-1 symmetry breaking scale (μ331), we verify that the technigluon mass is strongly linked to the Z′ mass scale, for instance, if μ331 = 1 TeV , we have MZ′ > 1 TeV only if M TG < 350 GeV .

Spontaneous gauge symmetry breaking in conformal theories of a four-dimensional superstring

1989 ◽  
Vol 233 (1-2) ◽  
pp. 128-134
Author(s):  
Bum-Hoon Lee ◽  
Hitoshi Nishino
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking

scholarly journals GAUGE SYMMETRY BREAKING IN A THROAT GEOMETRY

2008 ◽  
Vol 23 (38) ◽  
pp. 3215-3224
Author(s):  
JACEK PAWEŁCZYK
Keyword(s):  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Bound State ◽  
Susy Breaking ◽  
Abelian Gauge

We analyze behavior of D3-branes in BGMPZ throat geometry. We show that although single brane has some of the moduli stabilized multi-brane system tends to expand and form a bound state. Such a system loses non-Abelian gauge symmetry. The described mechanism is an example of gauge symmetry breaking triggered by SUSY breaking.

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