arXiv subjects

Nicolo' Masi

Publications and source records attributed to Nicolo' Masi.

4 recordsLinked to original sources

arXiv2026

Dark matter glueball candidate from a $G(2)$--$E_6$--$E_7$ exceptional grand unified theory: $G$-parity, spin, mass and stability

We determine the gauge-invariant identity, mass scale and ultraviolet stability of the dark matter candidate arising from $G(2)\to SU(3)_C$ in the exceptional $G(2)\!-\!E_6\!-\!E_7$ construction. The broken $G(2)$ sector contains odd $1^{+-}$ and $0^{--}$ channels, whereas the scalar $0^{++}\sim X\bar X$ state is even and unprotected. For $m_X\simeq5.7\times10^{13}\,\mathrm{GeV}$, weak-binding reference masses are $M_{2X}\simeq1.14\times10^{14}\,\mathrm{GeV}$ and $M_{3X}\simeq1.71\times10^{14}\,\mathrm{GeV}$, while the exact pole masses remain nonperturbative. Gauge-invariant Fröhlich--Morchio--Strocchi (FMS) operators, Hall--Post bounds, $Y$-junction arguments and the pure-$SU(3)$ glue spectrum favor $1^{+-}$ in their controlled regimes without excluding a deeply bound $0^{--}$ state. We then test whether this dark grading survives the full chiral exceptional embedding. An on-shell analysis finds no independent purely dark odd operator through dimension seven: the first nonvanishing basis appears at dimension nine. So the minimal one-copy exceptional embedding does not provide an exact ultraviolet dark $G$-parity. Moving the dark Higgs from the common $\mathbf{1463}_H$ parent to a separated $\mathbf{1539}_H$ removes the scalar-parent obstruction and the relevant dimension-nine exceptional parents vanish on the selected pure-dark component in the undressed limit. A genuinely gauged or geometric $\mathbb Z_{2,D}$ would therefore leave a bosonic parity after dark Higgsing. Its extension to the mirror-free theory nevertheless fails because the required $G(2)$ conjugation also conjugates color, $\mathbf3_C\leftrightarrow\bar{\mathbf3}_C$. The remaining obstruction to exact dark matter stability is therefore ultraviolet and chiral, rather than low-energy or purely scalar.

hep-ph↗

arXiv2021

An Exceptional G(2) Extension of the Standard Model from the Correspondence with Cayley-Dickson Algebras Automorphism Groups

In this article I propose a new criterion to extend the Standard Model of particle physics from a straightforward algebraic conjecture: the symmetries of physical microscopic forces originate from the automorphism groups of main Cayley-Dickson algebras, from complex numbers to octonions and sedenions. This correspondence leads to a natural enlargement of the Standard Model color sector, from a SU(3) gauge group to an exceptional Higgs-broken G(2) group, following the octonionic automorphism relation guideline. In this picture, an additional ensemble of massive G(2)-gluons emerges, which is separated from the particle dynamics of the Standard Model.

hep-ph↗

arXiv2015

A Bound on Equipartition of Energy

In this article we want to demonstrate that the time-scale constraints for a thermodynamic system imply the new concept of {\it equipartition of energy bound} (EEB) or, more generally, a thermodynamical bound for the {\it partition} of energy. We theorized and discussed the possibility to put an upper limit to the equipartition factor for a fluid of particles. This could be interpreted as a sort of transcription of the entropy bounds from quantum-holographic sector: the EEB number $π^{2}/2 = 4.93$, obtained from a comparison between the Margolus-Levitin quantum theorem and the TTT bound for relaxation times by Hod, seems like a special value for the thermodynamics of particle systems. This bound has been related to the idea of an extremal statistics and independently traced in a statistical mechanics framework, analyzing the mathematical behavior of the distributions which obey to a thermodynamical statistics with a power law greater than the planckian one.

physics.gen-ph↗

arXiv2013

On the behavior of the bounds of the holographic theory for massive and massless particle systems

The aim of the present dissertation is to analyze the meaning of the entropy bounds of the holographic sector once tested for statistical ensembles of particles, in order to deeper investigate the nature of these constraints and their mutual links. From the Universal Energy Bound (UEB) simple time constraints can be argued, which are manifestations of the discrete nature of the space-time and of the presence of ultimate space-time scales. From the combined effort of the UEB and of the Holographic bound by 't Hooft and Susskind, an entropy density bound as a function of temperature is achieved.

physics.gen-ph↗