Results 31 to 40 of about 119,582 (346)

Minimal supersymmetric grand unified theory: Symmetry breaking and the particle spectrum [PDF]

open access: yes, 2004
We discuss in detail the symmetry breaking and related issues in the minimal renormalizable supersymmetric grand unified theory. We compute the particle spectrum and study its impact on the physical scales of the theory. This provides a framework for the
B. Bajc   +3 more
semanticscholar   +1 more source

E 6 grand unified theory with three generations from heterotic string theory [PDF]

open access: yes, 2010
We construct two more supersymmetric E{sub 6} grand unified models with three generations within the framework of Z{sub 12} asymmetric orbifold compactification of the heterotic string theory.
Motoharu Ito   +7 more
semanticscholar   +1 more source

S4 flavor symmetry and fermion masses: towards a grand unified theory of flavor [PDF]

open access: yes, 2006
Pursuing a bottom-up approach to explore which flavor symmetry could serve as an explanation of the observed fermion masses and mixings, we discuss an extension of the standard model (SM) where the flavor structure for both quarks and leptons is ...
C. Hagedorn, M. Lindner, R. N. Mohapatra
semanticscholar   +1 more source

Probing grand unification with quantum sensors

open access: yesPhysics Letters B
We discuss how grand unification can be probed with experiments at low energies using quantum sensors. Specifically, we show that scalar multiplets coupled to the gauge sector of a grand unified theory provide a mechanism for a time-varying unified ...
Xavier Calmet, Nathaniel Sherrill
doaj   +1 more source

Unification of the standard model and dark matter sectors in [SU(5) × U(1)]4

open access: yesJournal of High Energy Physics, 2019
A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry. When a chiral matter content in a strong dynamics satisfies the t’Hooft anomaly matching condition, a massless baryon is a natural candidate of the ...
Ayuki Kamada   +2 more
doaj   +1 more source

Does a Theory of Everything Exist?

open access: yesФилософия и космология, 2021
Since Einstein’s failure to define a Grand Unified Theory, physicists have pursued a comprehensive theory explaining nature, a Theory of Everything. But because General Relativity, Quantum Field Theory, and Cosmology have little in common, defining one ...
James R Johnson
doaj   +1 more source

Grand unified theory constrained supersymmetry and neutrinoless double beta decay [PDF]

open access: yes, 1999
We analyze the contributions to the neutrinoless double $\beta$ decay ($0\nu\beta\beta$-decay) coming from the Grand Unified Theory (GUT) constrained Minimal Supersymmetric Standard Model (MSSM) with trilinear R-parity breaking. We discuss the importance
Andrzej Wodecki   +2 more
semanticscholar   +1 more source

Sterile neutrinos in string derived models

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
The MiniBooNE collaboration recently reported further evidence for the existence of sterile neutrinos, implying substantial mixing with the left-handed active neutrinos and at a comparable mass scale.
Alon E. Faraggi
doaj   +1 more source

Are there minimal exceptional aGUTs from stable 5D orbifolds?

open access: yesEuropean Physical Journal C: Particles and Fields
In analysing five dimensional orbifolds with exceptional gauge groups, we seek to find stable vacua configurations which satisfy the minimal requirements for asymptotic grand unified models.
Giacomo Cacciapaglia   +6 more
doaj   +1 more source

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