Gauge-Symmetry Protection Using Single-Body Terms

The article presents the questions of reviewing models and mechanisms of public administration in the procurement of goods, works and services in the field of construction. A comparative analysis of the types of public procurement mechanisms in construction, based on a set of features, has shown the superiority of a centralized type of mechanism that facilitates the introduction of efficient and flexible procurement methods, for example, the conclusion of framework agreements. The author’s vision of the mechanism of state building purchases, in the form of a conceptual model and system differences, is proposed. It is determined that a decentralized model of public procurement management involves the independent implementation by purchasers of procurement, that is, allows each customer to procure goods, works and services in the field of construction. The centralized model of public administration is characterized by the implementation of public procurement in order to provide the general needs of a single body on public procurement, that is, customers commission the implementation of public procurement on their behalf, a centralized body. According to the combined model of management, public procurement in the construction industry takes place under contracts implemented under the centralized model, and the direct ordering and receipt of goods, works, or services takes place according to the rules of a decentralized model. It is noted that according to the system-wide understanding of the mechanism of public administration in the procurement of goods, works and services in the field of construction, it represents a set of specialized management technologies (methods, techniques and tools) that ensure the organization of the process of public procurement of construction products by authorized agents. The direction of this process is determined by the need to implement the principles of vali- dity and innovation, fair choice of the best bidding, prevention of corruption and ensuring the high efficiency of the implementation of public public procurement.

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Dynamical rearrangement of gauge symmetry on the orbifold S1/Z2

Nuclear Physics B ◽

10.1016/s0550-3213(03)00142-1 ◽

2003 ◽

Vol 657 ◽

pp. 169-213 ◽

Cited By ~ 82

Author(s):

Naoyuki Haba ◽

Masatomi Harada ◽

Yutaka Hosotani ◽

Yoshiharu Kawamura

Keyword(s):

Gauge Symmetry

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

Physical Review Research ◽

10.1103/physrevresearch.3.023002 ◽

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

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Morris-Thorne wormhole in the vector-tensor theories with Abelian gauge symmetry breaking

Physical Review D ◽

10.1103/physrevd.104.044006 ◽

2021 ◽

Vol 104 (4) ◽

Author(s):

Ai-chen Li ◽

Xin-Fei Li

Keyword(s):

Gauge Symmetry ◽

Symmetry Breaking ◽

Abelian Gauge

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Construction and Characterization of Representations of SU(7) for GUT Model Builders

Symmetry ◽

10.3390/sym13061044 ◽

2021 ◽

Vol 13 (6) ◽

pp. 1044

Author(s):

Daniel Jones ◽

Jeffery A. Secrest

Keyword(s):

Gauge Symmetry ◽

Symmetry Group ◽

Lie Group ◽

Cartan Subalgebra ◽

Natural Extension ◽

Grand Unification ◽

Raising And Lowering Operators ◽

Higher Dimensional ◽

Lowering Operators

The natural extension to the SU(5) Georgi-Glashow grand unification model is to enlarge the gauge symmetry group. In this work, the SU(7) symmetry group is examined. The Cartan subalgebra is determined along with their commutation relations. The associated roots and weights of the SU(7) algebra are derived and discussed. The raising and lowering operators are explicitly constructed and presented. Higher dimensional representations are developed by graphical as well as tensorial methods. Applications of the SU(7) Lie group to supersymmetric grand unification as well as applications are discussed.

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A Brief Review of Implicit Regularization and Its Connection with the BPHZ Theorem

Symmetry ◽

10.3390/sym13060956 ◽

2021 ◽

Vol 13 (6) ◽

pp. 956

Author(s):

Dafne Carolina Arias-Perdomo ◽

Adriano Cherchiglia ◽

Brigitte Hiller ◽

Marcos Sampaio

Keyword(s):

Field Theory ◽

Quantum Field Theory ◽

Gauge Symmetry ◽

Particle Physics ◽

Analytic Extension ◽

Quantum Field ◽

Loop Order ◽

Time Dimension ◽

The Core ◽

Striking Success

Quantum Field Theory, as the keystone of particle physics, has offered great insights into deciphering the core of Nature. Despite its striking success, by adhering to local interactions, Quantum Field Theory suffers from the appearance of divergent quantities in intermediary steps of the calculation, which encompasses the need for some regularization/renormalization prescription. As an alternative to traditional methods, based on the analytic extension of space–time dimension, frameworks that stay in the physical dimension have emerged; Implicit Regularization is one among them. We briefly review the method, aiming to illustrate how Implicit Regularization complies with the BPHZ theorem, which implies that it respects unitarity and locality to arbitrary loop order. We also pedagogically discuss how the method complies with gauge symmetry using one- and two-loop examples in QED and QCD.

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Electroweak-like baryogenesis with new chiral matter

Journal of High Energy Physics ◽

10.1007/jhep07(2021)224 ◽

2021 ◽

Vol 2021 (7) ◽

Author(s):

Kohei Fujikura ◽

Keisuke Harigaya ◽

Yuichiro Nakai ◽

Ruoquan Wang

Keyword(s):

Phase Transition ◽

Gauge Symmetry ◽

Cp Violation ◽

Standard Model ◽

Dipole Moments ◽

Dark Matter Candidate ◽

Lepton Asymmetry ◽

First Order ◽

The Standard Model ◽

Concrete Realization

Abstract We propose a framework where a phase transition associated with a gauge symmetry breaking that occurs (not far) above the electroweak scale sets a stage for baryogenesis similar to the electroweak baryogenesis in the Standard Model. A concrete realization utilizes the breaking of SU(2)R× U(1)X→ U(1)Y. New chiral fermions charged under the extended gauge symmetry have nonzero lepton numbers, which makes the B − L symmetry anomalous. The new lepton sector contains a large flavor-dependent CP violation, similar to the Cabibbo-Kobayashi-Maskawa phase, without inducing sizable electric dipole moments of the Standard Model particles. A bubble wall dynamics associated with the first-order phase transition and SU(2)R sphaleron processes generate a lepton asymmetry, which is transferred into a baryon asymmetry via the ordinary electroweak sphaleron process. Unlike the Standard Model electroweak baryogenesis, the new phase transition can be of the strong first order and the new CP violation is not significantly suppressed by Yukawa couplings, so that the observed asymmetry can be produced. The model can be probed by collider searches for new particles and the observation of gravitational waves. One of the new leptons becomes a dark matter candidate. The model can be also embedded into a left-right symmetric theory to solve the strong CP problem.

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The TianQin project: Current progress on science and technology

Progress of Theoretical and Experimental Physics ◽

10.1093/ptep/ptaa114 ◽

2020 ◽

Author(s):

Jianwei Mei ◽

Yan-Zheng Bai ◽

Jiahui Bao ◽

Enrico Barausse ◽

Lin Cai ◽

...

Keyword(s):

Black Hole ◽

Ecliptic Plane ◽

Mass Ratio ◽

Massive Black Hole ◽

Black Hole Binaries ◽

Compact Binaries ◽

Single Body ◽

Science Operations ◽

New Generation ◽

Research Facilities

Abstract TianQin is a planned space-based gravitational wave (GW) observatory consisting of three Earth-orbiting satellites with an orbital radius of about $10^5 \, {\rm km}$. The satellites will form an equilateral triangle constellation the plane of which is nearly perpendicular to the ecliptic plane. TianQin aims to detect GWs between $10^{-4} \, {\rm Hz}$ and $1 \, {\rm Hz}$ that can be generated by a wide variety of important astrophysical and cosmological sources, including the inspiral of Galactic ultra-compact binaries, the inspiral of stellar-mass black hole binaries, extreme mass ratio inspirals, the merger of massive black hole binaries, and possibly the energetic processes in the very early universe and exotic sources such as cosmic strings. In order to start science operations around 2035, a roadmap called the 0123 plan is being used to bring the key technologies of TianQin to maturity, supported by the construction of a series of research facilities on the ground. Two major projects of the 0123 plan are being carried out. In this process, the team has created a new-generation $17 \, {\rm cm}$ single-body hollow corner-cube retro-reflector which was launched with the QueQiao satellite on 21 May 2018; a new laser-ranging station equipped with a $1.2 \, {\rm m}$ telescope has been constructed and the station has successfully ranged to all five retro-reflectors on the Moon; and the TianQin-1 experimental satellite was launched on 20 December 2019—the first-round result shows that the satellite has exceeded all of its mission requirements.

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ANOMALOUS U(1)A AND ELECTROWEAK SYMMETRY BREAKING

Modern Physics Letters A ◽

10.1142/s0217732301004005 ◽

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.

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