Mario E. Gomez
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Mario E. Gomez has a total of 255 co-authors. Here are the top co-authors by number of shared publications:
- Jose Rodriguez-Quintero
Department of Integrated Sciences and Center for Advanced Studies in Physics, Mathematics and Computation, University of Huelva, Huelva, Spain
13 shared publications - Muhammad Rehman
Department of Physics, COMSATS University Islamabad, Islamabad, Pakistan
9 shared publications - S. Lola
Department of Physics, University of Patras, Patras, Greece
8 shared publications - Constantinos Pallis
Aristotle University of Thessaloniki
7 shared publications S. Lola
Department of Physics, University of Patras, 26500 Patras, Greece
7 shared publications- John Ellis
Department of Physics, King’s College London, London WC2R 2LS, United Kingdom
6 shared publications
Latest Publications
- Open Access
- 9 December 2025
- Published by Sissa Medialab Srl
- Vol. 490, 215
Confronting lepton violation with muon g-2 and Dark Matter in SUSY-GUTs.
We present a class of SUSY GUT models based on $SU(4)_c \times SU(2)_L \times SU(2)_R$ that simultaneously address the muon $g-2$ puzzle and explain dark matter. We find that these models can be complemented with additional symmetries to explain fermion masses and neutrino oscillations, adding to the predictions the possible observation of charged lepton violating decay. Thereby, creating a correlated network of potential SUSY discovery channels.- 9 December 2025
- Published by Sissa Medialab Srl
- Vol. 490, 215
Open AccessConfronting lepton violation with muon g-2 and Dark Matter in SUSY-GUTs.
We present a class of SUSY GUT models based on $SU(4)_c \times SU(2)_L \times SU(2)_R$ that simultaneously address the muon $g-2$ puzzle and explain dark matter. We find that these models can be complemented with additional symmetries to explain fermion masses and neutrino oscillations, adding to the predictions the possible observation of charged lepton violating decay. Thereby, creating a correlated network of potential SUSY discovery channels. - Open Access
- 19 September 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (5)
Radiative corrections to the , , parameters and their impact on the boson mass in the 331 modelWe investigate radiative corrections to electroweak precision observables, specifically the Peskin-Takeuchi parameters S , T , and U , in the S U ( 3 ) C × S U ( 3 ) L × U ( 1 ) X model (also known as the 331 model) with β = − 3 . Using the and heno packages, we compute the mass spectrum and low-energy observables. We show that these parameters place strong constraints on the model, requiring most of the scalar masses to lie in the TeV range or below, and impose indirect bounds on the newly predicted gauge bosons. Furthermore, we demonstrate that the model can accommodate the W boson mass anomaly reported by the CDF Collaboration, should future measurements confirm its persistence.
- 19 September 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (5)
Open AccessRadiative corrections to the , , parameters and their impact on the boson mass in the 331 modelWe investigate radiative corrections to electroweak precision observables, specifically the Peskin-Takeuchi parameters S , T , and U , in the S U ( 3 ) C × S U ( 3 ) L × U ( 1 ) X model (also known as the 331 model) with β = − 3 . Using the and heno packages, we compute the mass spectrum and low-energy observables. We show that these parameters place strong constraints on the model, requiring most of the scalar masses to lie in the TeV range or below, and impose indirect bounds on the newly predicted gauge bosons. Furthermore, we demonstrate that the model can accommodate the W boson mass anomaly reported by the CDF Collaboration, should future measurements confirm its persistence.
- Open Access
- 8 May 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 111 (9)
Muon anomalous magnetic moment in the excited fermion paradigm
Extensions of the standard model featuring excited fermions present an interesting framework that motivates the search for exotic particles at the LHC. Additionally, these extensions offer potential explanations for the muon’s anomalous magnetic moment and other precision observables, shedding light on the energy scale and key parameters of the new theory. Our analysis focuses on the one-loop radiative correction originating from excited lepton doublet and triplet states using the effective Lagrangian approach. The bounds derived from the ( g − 2 ) μ anomaly can be complemented with the ones arising from other observables, like the electroweak precision observable Δ ρ and the signals from direct LHC searches to constrain the effective theory. Our results suggest that the ( g − 2 ) μ anomaly can be addressed within a very narrow region of the effective theory scale. Consequently, this imposes indirect constraints on the parameter space of excited fermions. Published by the American Physical Society 2025
- 8 May 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 111 (9)
Open AccessMuon anomalous magnetic moment in the excited fermion paradigm
Extensions of the standard model featuring excited fermions present an interesting framework that motivates the search for exotic particles at the LHC. Additionally, these extensions offer potential explanations for the muon’s anomalous magnetic moment and other precision observables, shedding light on the energy scale and key parameters of the new theory. Our analysis focuses on the one-loop radiative correction originating from excited lepton doublet and triplet states using the effective Lagrangian approach. The bounds derived from the ( g − 2 ) μ anomaly can be complemented with the ones arising from other observables, like the electroweak precision observable Δ ρ and the signals from direct LHC searches to constrain the effective theory. Our results suggest that the ( g − 2 ) μ anomaly can be addressed within a very narrow region of the effective theory scale. Consequently, this imposes indirect constraints on the parameter space of excited fermions. Published by the American Physical Society 2025
- Open Access
Nonholomorphic Higgsino Mass Term Effects on Muon g − 2 and Dark Matter Relic Density in Flavor Symmetry-Based Minimal Supersymmetric Standard Model
We investigate the phenomenological effects of the nonholomorphic (NH) higgsino mass term, , within the minimal supersymmetric standard model (MSSM) extended by a non-abelian flavor symmetry, referred to as the sNHSSM. This flavor symmetry enables a substantial reduction in the number of free parameters inherent to the MSSM, streamlining them from a large set to just eight. Our study explores the interplay between cold dark matter (CDM) relic density () and the anomalous magnetic moment of the muon, . We study correlations among the theoretical parameters that emerge from this interplay and are further constrained by experimental data such as the Higgs boson mass, B-physics observables, and the charge and color breaking minima constraints. Moreover, our findings reveal that incorporating the NH higgsino mass term opens up new regions of parameter space that were previously inaccessible.Open AccessNonholomorphic Higgsino Mass Term Effects on Muon g − 2 and Dark Matter Relic Density in Flavor Symmetry-Based Minimal Supersymmetric Standard Model
We investigate the phenomenological effects of the nonholomorphic (NH) higgsino mass term, , within the minimal supersymmetric standard model (MSSM) extended by a non-abelian flavor symmetry, referred to as the sNHSSM. This flavor symmetry enables a substantial reduction in the number of free parameters inherent to the MSSM, streamlining them from a large set to just eight. Our study explores the interplay between cold dark matter (CDM) relic density () and the anomalous magnetic moment of the muon, . We study correlations among the theoretical parameters that emerge from this interplay and are further constrained by experimental data such as the Higgs boson mass, B-physics observables, and the charge and color breaking minima constraints. Moreover, our findings reveal that incorporating the NH higgsino mass term opens up new regions of parameter space that were previously inaccessible. - Open Access
- 1 January 2025
- Published by Wiley in Advances in High Energy Physics
- Vol. 2025 (1)
Interplay Between M W , Ω CDM h 2 , and ( g − 2) μ in Flavor Symmetry–Based Supersymmetric Models
We study the phenomenological implications of the minimal supersymmetric standard model (MSSM) augmented by a nonabelian flavor symmetry labeled as sMSSM. Incorporating this flavor symmetry allows for a significant reduction in the original plethora of free parameters present in the MSSM, ultimately reducing them down to just seven in sMSSM. This reduction of free parameters is not achieved through ad hoc assumptions like in the constrained MSSM (CMSSM); rather, it is grounded in theoretical considerations. Our work focuses on exploring the interplay between the W boson mass ( M W ) predictions, the cold dark matter (CDM) relic abundance ( Ω CDM h 2 ), and the ( g − 2) μ anomaly. We identified correlations among the theoretical parameters arising from this interplay, which can be complemented by experimental constraints such as the Higgs boson mass, B‐physics observables, and charge and color breaking minima. Additionally, our investigations show that the ( g − 2) μ discrepancy and the Planck bounds on Ω C D M h 2 can be addressed within the sMSSM but only in a very narrow region of the parameter space.
- 1 January 2025
- Published by Wiley in Advances in High Energy Physics
- Vol. 2025 (1)
Open AccessInterplay Between M W , Ω CDM h 2 , and ( g − 2) μ in Flavor Symmetry–Based Supersymmetric Models
We study the phenomenological implications of the minimal supersymmetric standard model (MSSM) augmented by a nonabelian flavor symmetry labeled as sMSSM. Incorporating this flavor symmetry allows for a significant reduction in the original plethora of free parameters present in the MSSM, ultimately reducing them down to just seven in sMSSM. This reduction of free parameters is not achieved through ad hoc assumptions like in the constrained MSSM (CMSSM); rather, it is grounded in theoretical considerations. Our work focuses on exploring the interplay between the W boson mass ( M W ) predictions, the cold dark matter (CDM) relic abundance ( Ω CDM h 2 ), and the ( g − 2) μ anomaly. We identified correlations among the theoretical parameters arising from this interplay, which can be complemented by experimental constraints such as the Higgs boson mass, B‐physics observables, and charge and color breaking minima. Additionally, our investigations show that the ( g − 2) μ discrepancy and the Planck bounds on Ω C D M h 2 can be addressed within the sMSSM but only in a very narrow region of the parameter space.
- Open Access
- 7 November 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 110 (9)
Muon and lepton flavor violation in supersymmetric GUTsWe present a class of supersymmetric (SUSY) GUT models that can explain the apparent discrepancy between the SM predictions and experimental values of muon g − 2 while providing testable signals for lepton flavor violation in charged lepton decays. Moreover, these models predict LSP neutralino abundance that is compatible with the Planck dark matter bounds. We find that scenarios in the framework of S U ( 4 ) c × S U ( 2 ) L × S U ( 2 ) R unification, with additional symmetries to explain fermion masses and neutrino oscillations, provide interesting benchmarks for the search of SUSY by correlating a possible manifestation of it in dark matter, rare lepton decays, and LHC signals. Published by the American Physical Society 2024
- 7 November 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 110 (9)
Open AccessMuon and lepton flavor violation in supersymmetric GUTsWe present a class of supersymmetric (SUSY) GUT models that can explain the apparent discrepancy between the SM predictions and experimental values of muon g − 2 while providing testable signals for lepton flavor violation in charged lepton decays. Moreover, these models predict LSP neutralino abundance that is compatible with the Planck dark matter bounds. We find that scenarios in the framework of S U ( 4 ) c × S U ( 2 ) L × S U ( 2 ) R unification, with additional symmetries to explain fermion masses and neutrino oscillations, provide interesting benchmarks for the search of SUSY by correlating a possible manifestation of it in dark matter, rare lepton decays, and LHC signals. Published by the American Physical Society 2024
- Open Access
- 25 June 2022
- Published by Springer Nature in The European Physical Journal C
- Vol. 82 (6) , 1-23
Muon $\mathbf {g-2}$, neutralino dark matter and stau NLSPWe explore the implications of resolving the muon $$g-2$$ anomaly in a $$SU(4)_c \times SU(2)_L \times SU(2)_R$$ model, where the soft supersymmetry breaking scalar and gaugino masses break the left-right (LR) symmetry. A 2 $$\sigma $$ resolution of the anomaly requires relatively light sleptons, chargino and LSP neutralino. The stau turns out to be the NLSP of mass $$m_{\tilde{\tau }}\lesssim 400$$ GeV, and the sleptons from the first two families can be as heavy as about 800 GeV. The chargino is also required to be lighter than about 600 GeV to accommodate the muon $$g-2$$ solutions consistent with the dark matter relic density constraint. The dominant right-handed nature of the light slepton states suppress the sensitivity of possible signals which can be probed in Run3 experiments at the LHC. We also discuss the impact of accommodating the Higgs boson mass and the vacuum stability of the scalar potential for these solutions. Although a light stau can be compatible with the stability of the scalar potential, the Higgs boson mass constraint has a strong impact on the solutions with $$\tan \beta $$ bounded from above, namely $$\tan \beta \lesssim 20$$ . The Higgsinos are heavier than about 4 TeV, and the LSP neutralino has the correct relic density if it is Bino-like. We identify stau–neutralino coannihilation as the dominant mechanism for realizing the desired dark matter relic density, with sneutrino–neutralino coannihiliation playing a minor role. These bino-like dark matter solutions can yield a spin-independent scattering cross-section on the order of $$10^{-13}$$ pb which hopefully, can be expected to be tested in the near future.- 25 June 2022
- Published by Springer Nature in The European Physical Journal C
- Vol. 82 (6) , 1-23
Open AccessMuon $\mathbf {g-2}$, neutralino dark matter and stau NLSPWe explore the implications of resolving the muon $$g-2$$ anomaly in a $$SU(4)_c \times SU(2)_L \times SU(2)_R$$ model, where the soft supersymmetry breaking scalar and gaugino masses break the left-right (LR) symmetry. A 2 $$\sigma $$ resolution of the anomaly requires relatively light sleptons, chargino and LSP neutralino. The stau turns out to be the NLSP of mass $$m_{\tilde{\tau }}\lesssim 400$$ GeV, and the sleptons from the first two families can be as heavy as about 800 GeV. The chargino is also required to be lighter than about 600 GeV to accommodate the muon $$g-2$$ solutions consistent with the dark matter relic density constraint. The dominant right-handed nature of the light slepton states suppress the sensitivity of possible signals which can be probed in Run3 experiments at the LHC. We also discuss the impact of accommodating the Higgs boson mass and the vacuum stability of the scalar potential for these solutions. Although a light stau can be compatible with the stability of the scalar potential, the Higgs boson mass constraint has a strong impact on the solutions with $$\tan \beta $$ bounded from above, namely $$\tan \beta \lesssim 20$$ . The Higgsinos are heavier than about 4 TeV, and the LSP neutralino has the correct relic density if it is Bino-like. We identify stau–neutralino coannihilation as the dominant mechanism for realizing the desired dark matter relic density, with sneutrino–neutralino coannihiliation playing a minor role. These bino-like dark matter solutions can yield a spin-independent scattering cross-section on the order of $$10^{-13}$$ pb which hopefully, can be expected to be tested in the near future. - Open Access
Cosmology of an Axion-Like Majoron
We propose a singlet majoron model that defines an inverse seesaw mechanism in the $\nu$ sector. The majoron $\phi$ has a mass $m_\phi\approx 0.5$ eV and a coupling to the $\tau$ lepton similar to the one to neutrinos. In the early universe it is initially in thermal equilibrium, then it decouples at $T\approx 500$ GeV and contributes with just $\Delta N_{\rm eff}=0.026$ during BBN. At $T=26$ keV (final stages of BBN) a primordial magnetic field induces resonant $\gamma \leftrightarrow \phi$ oscillations that transfer 6% of the photon energy into majorons, implying $\Delta N_{\rm eff}=0.55$ and a 4.7% increase in the baryon to photon ratio. At $T\approx m_\phi$ the majoron enters in thermal contact with the heaviest neutrino and it finally decays into $\nu \bar \nu$ pairs near recombination, setting $\Delta N_{\rm eff}=0.85$. The boost in the expansion rate at later times may relax the Hubble tension (we obtain $H_0=(71.4\pm 0.5)$ km/s/Mpc), while the processes $ \nu\bar \nu \leftrightarrow \phi$ suppress the free streaming of these particles and make the model consistent with large scale structure observations. Its lifetime and the fact that it decays into neutrinos instead of photons lets this axion-like majoron avoid the strong bounds that affect other axion-like particles of similar mass and coupling to photons.Open AccessCosmology of an Axion-Like Majoron
We propose a singlet majoron model that defines an inverse seesaw mechanism in the $\nu$ sector. The majoron $\phi$ has a mass $m_\phi\approx 0.5$ eV and a coupling to the $\tau$ lepton similar to the one to neutrinos. In the early universe it is initially in thermal equilibrium, then it decouples at $T\approx 500$ GeV and contributes with just $\Delta N_{\rm eff}=0.026$ during BBN. At $T=26$ keV (final stages of BBN) a primordial magnetic field induces resonant $\gamma \leftrightarrow \phi$ oscillations that transfer 6% of the photon energy into majorons, implying $\Delta N_{\rm eff}=0.55$ and a 4.7% increase in the baryon to photon ratio. At $T\approx m_\phi$ the majoron enters in thermal contact with the heaviest neutrino and it finally decays into $\nu \bar \nu$ pairs near recombination, setting $\Delta N_{\rm eff}=0.85$. The boost in the expansion rate at later times may relax the Hubble tension (we obtain $H_0=(71.4\pm 0.5)$ km/s/Mpc), while the processes $ \nu\bar \nu \leftrightarrow \phi$ suppress the free streaming of these particles and make the model consistent with large scale structure observations. Its lifetime and the fact that it decays into neutrinos instead of photons lets this axion-like majoron avoid the strong bounds that affect other axion-like particles of similar mass and coupling to photons. - Open Access
- 30 September 2020
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2020 (9) , 1-29
Confronting grand unification with lepton flavour violation, dark matter and LHC data
We explore possible signatures for charged lepton flavour violation (LFV), sparticle discovery at the LHC and dark matter (DM) searches in grand unified theories (GUTs) based on SU(5), flipped SU(5) (FSU(5)) and SU(4)c×SU(2)L×SU(2)R (4-2-2). We assume that soft supersymmetry-breaking terms preserve the group symmetry at some high input scale, and focus on the non-universal effects on different matter representations generated by gauge interactions at lower scales, as well as the charged LFV induced in Type-1 see-saw models of neutrino masses. We identify the different mechanisms that control the relic DM density in the various GUT models, and contrast their LFV and LHC signatures. The SU(5) and 4-2-2 models offer good detection prospects both at the LHC and in LFV searches, though with different LSP compositions, and the SU(5) and FSU(5) models offer LFV within the current reach. The 4-2-2 model allows chargino and gluino coannihilations with neutralinos, and the former offer good detection prospects for both the LHC and LFV, while gluino coannihilations lead to lower LFV rates. Our results indicate that LFV is a powerful tool that complements LHC and DM searches, providing significant insights into the sparticle spectra and neutrino mass parameters in different models.
- 30 September 2020
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2020 (9) , 1-29
Open AccessConfronting grand unification with lepton flavour violation, dark matter and LHC data
We explore possible signatures for charged lepton flavour violation (LFV), sparticle discovery at the LHC and dark matter (DM) searches in grand unified theories (GUTs) based on SU(5), flipped SU(5) (FSU(5)) and SU(4)c×SU(2)L×SU(2)R (4-2-2). We assume that soft supersymmetry-breaking terms preserve the group symmetry at some high input scale, and focus on the non-universal effects on different matter representations generated by gauge interactions at lower scales, as well as the charged LFV induced in Type-1 see-saw models of neutrino masses. We identify the different mechanisms that control the relic DM density in the various GUT models, and contrast their LFV and LHC signatures. The SU(5) and 4-2-2 models offer good detection prospects both at the LHC and in LFV searches, though with different LSP compositions, and the SU(5) and FSU(5) models offer LFV within the current reach. The 4-2-2 model allows chargino and gluino coannihilations with neutralinos, and the former offer good detection prospects for both the LHC and LFV, while gluino coannihilations lead to lower LFV rates. Our results indicate that LFV is a powerful tool that complements LHC and DM searches, providing significant insights into the sparticle spectra and neutrino mass parameters in different models.
- Open Access
- 15 July 2020
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2020 (7) , 1-16
Testing Yukawa unification at LHC Run-3 and HL-LHC
We exploret-b-τYukawa unification (YU) in a supersymmetric SU(4)c×SU(2)L×SU(2)Rmodel without imposing a discrete left-right (L-R) symmetry. A number of interesting solutions that are compatible witht-b-τYU, LSP neutralino dark matter (DM), and LHC and other experimental constraints are identified. In particular, they include gluino-neutralino and stau-neutralino coannihilation scenarios, where the NLSP gluino mass can range from 1–3 TeV. Higgsino-like dark matter solutions are also identified for which gluino masses can approach 5 TeV or so. This scenario will be tested at LHC Run-3 and its future upgrades.
- 15 July 2020
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2020 (7) , 1-16
Open AccessTesting Yukawa unification at LHC Run-3 and HL-LHC
We exploret-b-τYukawa unification (YU) in a supersymmetric SU(4)c×SU(2)L×SU(2)Rmodel without imposing a discrete left-right (L-R) symmetry. A number of interesting solutions that are compatible witht-b-τYU, LSP neutralino dark matter (DM), and LHC and other experimental constraints are identified. In particular, they include gluino-neutralino and stau-neutralino coannihilation scenarios, where the NLSP gluino mass can range from 1–3 TeV. Higgsino-like dark matter solutions are also identified for which gluino masses can approach 5 TeV or so. This scenario will be tested at LHC Run-3 and its future upgrades.