scholarly journals Realizing three generations of the Standard Model fermions in the type IIB matrix model

2014 ◽  
Vol 2014 (5) ◽  
Author(s):  
Hajime Aoki ◽  
Jun Nishimura ◽  
Asato Tsuchiya
Keyword(s):  
Standard Model ◽  
Matrix Model ◽  
Three Generations ◽  
The Standard Model

scholarly journals Progressing Beyond the Standard Model

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
B. A. Robson
Keyword(s):  
Standard Model ◽  
Particle Physics ◽  
Alternative Model ◽  
Generation Model ◽  
Beyond The Standard Model ◽  
Basic Assumptions ◽  
Three Generations ◽  
Considerable Success ◽  
The Standard Model

The Standard Model has enjoyed considerable success in describing a whole range of phenomena in particle physics. However, the model is considered incomplete because it provides little understanding of other empirical observations such as, the existence of three generations of leptons and quarks, which apart from mass have similar properties. This paper examines in some detail the basic assumptions upon which the Standard Model is built and compares these with the assumptions of an alternative model, the Generation Model. The Generation Model provides agreement with the Standard Model for those phenomena which the Standard Model is able to describe, but it is shown that the assumptions inherent in the Generation Model allow progress beyond the Standard Model.

scholarly journals CHIRAL N=1 4D ORIENTIFOLDS WITH D-BRANES AT ANGLES

2004 ◽  
Vol 19 (25) ◽  
pp. 1863-1879 ◽  
Author(s):  
GABRIELE HONECKER
Keyword(s):  
String Theory ◽  
Standard Model ◽  
Three Generations ◽  
The Standard Model ◽  
Stable Models

D6-branes intersecting at angles allow for phenomenologically appealing constructions of four-dimensional string theory vacua. While it is straightforward to obtain non-supersymmetric realizations of the standard model, supersymmetric and stable models with three generations and no exotic chiral matter require more involved orbifold constructions. The T6/(ℤ4×ℤ2×Ωℛ) case is discussed in detail. Other orbifolds including fractional D6-branes are treated briefly.

THE STANDARD MODEL WITH THREE GENERATIONS: CLOSING IN ON THE TOP QUARK MASS

1989 ◽  
Vol 04 (04) ◽  
pp. 753-768 ◽  
Author(s):  
F. HALZEN ◽  
C. S. KIM ◽  
S. PAKVASA
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Top Quark ◽  
Quark Mass ◽  
New Physics ◽  
Experimental Information ◽  
Beyond The Standard Model ◽  
Top Quark Mass ◽  
Three Generations ◽  
The Standard Model

Within the standard model with three generations we fit the top quark mass mt by combining experimental information of [Formula: see text] and [Formula: see text] mixing, CP-violation in K decay and the ratio Γ(W)/Γ(Z) extracted from [Formula: see text] collider data. We conclude that [Formula: see text] where the "systematic error" associated with theoretical ambiguities in performing the calculations is likely to be significantly larger than the quoted 10 GeV error associated with input parameters and experimental data. The anticipated value essentially guarantees the discovery of the top quark by existing experiments. Failure to discover it should force us to reconsider generally accepted calculational procedures before it signals new physics beyond the standard model. We discuss this in some detail.

scholarly journals CONNECTIONS AND GENERALIZED GAUGE TRANSFORMATIONS

2005 ◽  
Vol 02 (03) ◽  
pp. 505-542 ◽  
Author(s):  
SIMON DAVIS
Keyword(s):  
Standard Model ◽  
Fiber Bundle ◽  
Gauge Theories ◽  
Structure Group ◽  
Gauge Transformations ◽  
Three Generations ◽  
Higher Dimensional ◽  
Spinor Space ◽  
The Standard Model ◽  
Vector Bosons

The derivation of the standard model from a higher-dimensional action suggests a further study of the fiber bundle formulation of gauge theories to determine the variations in the choice of structure group that are allowed in this geometrical setting. The action of transformations on the projection of fibers to their submanifolds are characteristic of theories with fewer gauge vector bosons, and specific examples are given, which may have phenomenological relevance. The spinor space for the three generations of fermions in the standard model is described algebraically.

scholarly journals MSSM-LIKE AdS FLUX VACUA WITH FROZEN OPEN-STRING MODULI

2011 ◽  
Vol 26 (14) ◽  
pp. 2353-2376
Author(s):  
CHING-MING CHEN ◽  
TIANJUN LI ◽  
VAN ERIC MAYES ◽  
D. V. NANOPOULOS
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Open String ◽  
Adjoint Representation ◽  
Three Generations ◽  
The Standard Model ◽  
Massless Fields

We construct supersymmetric Pati–Salam flux vacua in AdS from intersecting D6-branes on T6/(ℤ2 × ℤ′2). The models constructed have three generations of MSSM matter plus right-handed neutrinos. Because the cycles wrapped by the D-branes are rigid there are no extra massless fields in the adjoint representation, arising as open-string moduli. However, we find that it is problematic to break the Pati–Salam gauge symmetry to the Standard Model (SM) while keeping the SM hypercharge massless.

scholarly journals A geometric progression on the mass of elementary fermions

2021 ◽  
Author(s):  
Li-Gong Mishulan
Keyword(s):  
Standard Model ◽  
Observational Data ◽  
Mass Distribution ◽  
Particle Physics ◽  
Physical Mechanism ◽  
Careful Analysis ◽  
Geometric Progression ◽  
Neutrino Masses ◽  
Three Generations ◽  
The Standard Model

Abstract The Standard Model of particle physics contains three generations of elementary fermions, which have prominent mass hierarchies. Through careful analysis of the observational data on the mass of elementary fermions, we determine that an intrinsic pattern does exist. A geometric progression is proposed to describe the mass distribution of elementary fermions, and using the observational data of neutrino oscillations, we can estimate the neutrino masses for all three generations. At the same time, we propose a hypothesis about the mass distribution of elementary fermions and explore the quantum physical mechanism of the origin of the elementary fermions masses hierarchies.

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