Article
Physics, Nuclear
Jotin Gogoi, Nayana Gautam, Mrinal Kumar Das
Summary: In this paper, we propose a model based on the modular symmetry in the framework of minimal inverse seesaw. The G(3) modular group, isomorphic to the A(4) non-Abelian discrete symmetry group, is used in this model. We investigate neutrino masses and mixings considering both normal and inverted hierarchies. The use of modular symmetry minimizes the requirement for additional flavons and their specific VEV alignments, ensuring the model's simplicity. Additionally, the Z(3) symmetry group is employed to restrict certain interaction terms in the Lagrangian. The effective mass is calculated to address the phenomena of neutrinoless double-beta decay (0νββ), and its values are consistent with experimental bounds (m(eff)<0.165eV).
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Physics, Particles & Fields
E. Fernandez-Martinez, M. Pierre, E. Pinsard, S. Rosauro-Alcaraz
Summary: This study analyzes the inverse Seesaw scenario for neutrino masses, where the Lepton number symmetry is broken dynamically by a scalar with Lepton number two, and shows how the associated Majoron can alleviate the Hubble tension. Additionally, it suggests that sterile neutrinos at the keV-MeV scale can explain all the dark matter component of the Universe if produced via freeze-in from the decays of heavier degrees of freedom.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Hiroshi Okada, Morimitsu Tanimoto
Summary: We studied quark and lepton mass matrices with a common modulus r in the A4 modular symmetry. Viable quark mass matrices were found to consist of modular forms with weights 2, 4, and 6. The modulus r was close to i, a fixed point in the fundamental region of SL(2, Z), and did not violate CP symmetry. The observed CP violation was reproduced at a slightly deviated r from r = i. The charged lepton mass matrix was also determined using modular forms of weights 2, 4, and 6, and the neutrino mass matrix was generated through the Weinberg operator using modular forms of weight 4. The overlap of allowed regions of r for quarks and leptons was observed in all cases of the charged lepton mass matrix, but the sum of neutrino masses was crucial in testing the common r. The minimum sum of neutrino masses at the common r was 140 meV. The inverted hierarchy of neutrino masses was not favorable in this framework. The residual symmetry ZS2 = {I, S} was suggested in quark and lepton mass matrices in our study.
PHYSICS OF THE DARK UNIVERSE
(2023)
Article
Physics, Particles & Fields
Thi Nhung Dao, Margarete Muehlleitner, Anh Vu Phan
Summary: In this study, the impact of the extended neutrino sector on the NMSSM Higgs sector is quantified by computing the complete one-loop corrections to the Higgs boson masses. The results are combined with the dominant two-loop corrections to improve the predictions for Higgs mixing and loop-corrected masses.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Chuan-Hung Chen, Cheng-Wei Chiang, Takaaki Nomura
Summary: In this study, we investigate the two-Higgs-doublet model with a type-II seesaw mechanism, considering the aligned two-Higgs-doublet scheme and its effects on muon anomalous magnetic dipole moment. By analyzing the contributions of one-loop and two-loop Barr-Zee type diagrams, we find that the Barr-Zee type diagrams mediated by the Higgs triplet fields have a dominant effect on a(mu). The masses of the corresponding particles in this model are around O(100) GeV, and the decay pattern of the doubly charged Higgs boson differs from the usual Higgs triplet model, suggesting a need for new collider search strategies like multi-tau searches at the LHC.
Article
Astronomy & Astrophysics
Cheng-Wei Chiang, Kei Yagyu
Summary: The mechanism discussed involves deriving charged lepton masses from one-loop diagrams mediated by particles in a dark sector, with a focus on scenarios where muon and electron masses are generated at one loop with new O(1) Yukawa couplings. An important prediction is that the Yukawa couplings of muon and electron can significantly deviate from their standard model predictions, which can be tested at High-Luminosity LHC and future e(+)e(-) colliders.
Article
Astronomy & Astrophysics
A. E. Carcamo Hernandez, Sergey Kovalenko, Farinaldo S. Queiroz, Yoxara S. Villamizar
Summary: In this paper, a model based on the SU (3)(C) x SU (3)(L) x U(1)(X) (3-3-1) gauge symmetry is proposed to explain the recent measurements of the muon anomalous magnetic moment (g-2) and nonzero neutrino masses. By introducing right-handed neutrinos and vector-like fermions, the model successfully explains the active neutrino masses and reproduces the recent Muon g(-2) results within the existing bounds.
Article
Physics, Multidisciplinary
Mayengbam Kishan Singh, S. Robertson Singh, N. Nimai Singh
Summary: Assuming the existence of a sterile neutrino at the electronvolt scale, this study develops a neutrino mass model based on the A(4) x Z(4) x Z(2) symmetry group. Using three Higgs fields, the model successfully generates a non-zero theta(13) and explains the active-sterile neutrino data in the normal hierarchy. Additionally, the study examines the results of kinematic measurements for ss-decay and neutrinoless double beta decay, which are consistent with the latest experimental bounds.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Astronomy & Astrophysics
B. L. Goncalves, Matthew Knauss, Marc Sher
Summary: In extended Higgs models, a discrete symmetry is required in the quark sector, but not necessarily in the lepton sector. We present a four-doublet model where one Higgs couples to quarks and three others couple to the electron, muon, and tau. The model is studied with various constraints and it is shown that the lighter additional scalars can decay into electrons and muons.
Article
Astronomy & Astrophysics
B. Ait Ouazghour, M. Chabab
Summary: This paper extends previous work to provide a detailed analysis of the naturalness problem and Bphysics constraints in the context of a two higgs doublets model with a complex scalar triplet field (2HDMcT). The study derives modified Vetman conditions to address the naturalness problem and evaluates the branching ratio of a radiative decay. The analysis shows the significant impact of naturalness on the masses of heavy Higgs bosons and establishes upper and lower limits based on experimental constraints. The study also highlights the necessary conditions for accommodating the experimental limits.
Article
Astronomy & Astrophysics
J. Jones-Perez, O. Suarez-Navarro
Summary: Heavy neutrinos from the type-I seesaw model can mix with active states and are being searched for at collider experiments. However, loop corrections to light neutrino masses lead to suppression of lepton number violating parameters, restricting heavy neutrinos to pseudo-Dirac pairs. This work reviews a proposal to relax these constraints by introducing supersymmetry (SUSY) and identifies conditions to maximize the SUSY screening effect for larger mass splitting between low-scale heavy neutrinos.
Article
Physics, Particles & Fields
Ivan Pacheco, Pablo Roig
Summary: In this study, we investigate lepton flavor violation (LFV) within the Littlest Higgs Model with T parity (LHT) realizing an inverse seesaw (ISS) mechanism. We find that compared to the traditional model, the presence of new O(10 TeV) Majorana neutrinos in the LHT model drives LFV processes. The typical rates we obtain are only one or two orders of magnitude below the present bounds, and the correlations among modes are drastically different from those of the traditional LHT and other models, which would ease the comparison of this scenario with experimental measurements of LFV processes involving charged leptons.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Javier Fuentes-Martin, Gino Isidori, Julie Pages, Ben A. Stefanek
Summary: In this study, the neutrino mass spectrum is analyzed and an extra-dimensional interpretation of a three-site Pati-Salam model is discussed. The model unifies all families of quark and leptons, provides a natural description of the Standard Model Yukawa couplings, and could potentially explain recent B-physics anomalies. The key feature of the model is the breaking of the Pati-Salam and electroweak gauge symmetries localized on opposite sites, with communication via nearest-neighbor interactions.
Article
Astronomy & Astrophysics
Yoko Irie, Osamu Seto, Tetsuo Shindou
Summary: In this study, a simple prescription is introduced to analyze the relationship in a class of models with an asymmetric Yukawa structure. The Zee-Babu model is used as a concrete example to discuss the phenomenological consequences of the model, with combined studies in neutrino physics, lepton flavor violation, and the search for new particles at collider experiments providing a comprehensive understanding of the Zee-Babu model.
Article
Astronomy & Astrophysics
Pavel Fileviez Perez, Elliot Golias, Alexis D. Plascencia
Summary: This paper points out the unique relations between the decay widths of leptoquarks and Higgs bosons, which can be utilized to test the unification of quarks and leptons at the TeV scale. The main predictions of the minimal theory for quark-lepton unification are discussed, and it is shown how the different decays of leptoquarks and Higgs bosons are related through the symmetry of the theory.
Article
Physics, Particles & Fields
A. E. Carcamo Hernandez, D T Huong, Ivan Schmidt
Summary: In this study, we propose a renormalizable theory that utilizes the inverse seesaw mechanism to explain the pattern of SM fermion masses. Our model is the first implementation of the inverse seesaw mechanism for the charged fermion sector and successfully accounts for the observed mass hierarchy and tiny masses of light neutrinos, as well as satisfies various constraints.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Cesar Bonilla, A. E. Carcamo Hernandez, Joao Goncalves, Felipe F. Freitas, Antonio P. Morais, R. Pasechnik
Summary: In this article, a model with two Higgs doublets and several scalar singlets is proposed to explain the observed pattern of fermion masses and mixing angles. Collider studies are conducted for vector-like leptons (VLLs) and vector-like quarks (VLQs) to determine their statistical significance for discovery at future LHC runs. The results show that VLLs with masses greater than 200 GeV cannot be safely excluded, and VLQs can be probed up to 3.8 TeV in the high-luminosity phase of the LHC.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
A. E. Carcamo Hernandez, Ivan Schmidt
Summary: This paper proposes a low scale renormalizable left-right symmetric theory that explains the hierarchy of fermion masses and the tiny mass values of light active neutrinos observed in the Standard Model. The theory is also consistent with various experimental constraints and phenomena, such as lepton and baryon asymmetries, anomalous magnetic moments of muons and electrons, meson oscillations, Higgs diphoton decay rate, and charged lepton flavor violation.
Article
Astronomy & Astrophysics
A. E. Carcamo Hernandez, Sergey Kovalenko, Farinaldo S. Queiroz, Yoxara S. Villamizar
Summary: In this paper, a model based on the SU (3)(C) x SU (3)(L) x U(1)(X) (3-3-1) gauge symmetry is proposed to explain the recent measurements of the muon anomalous magnetic moment (g-2) and nonzero neutrino masses. By introducing right-handed neutrinos and vector-like fermions, the model successfully explains the active neutrino masses and reproduces the recent Muon g(-2) results within the existing bounds.
Article
Physics, Multidisciplinary
Ivo de Medeiros Varzielas, Diogo Ivo
Summary: We study the minimization of multi-Higgs models with broken symmetries. Using the method of geometric minimization, we can analytically minimize the potentials of multi-Higgs models with large symmetries. However, when these symmetries are softly broken, we need to adapt the method. We propose a generalization that considers the effect of soft-breaking terms on the quadratic part of the potential by applying the procedure to restricted orbit spaces. We illustrate our methodology by finding and classifying the minima for an S4 multi-Higgs model with specific softly broken terms.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Particles & Fields
J. Kalinowski, W. Kotlarski, M. N. Rebelo, I. de Medeiros de Medeiros Varzielas
Summary: We conducted a comprehensive analysis of a 3-Higgs doublet model with a scalar potential invariant under a global Delta(27) discrete symmetry. The model's three scalar doublets were chosen to transform as a triplet under this discrete group. We studied the mass spectra for known tree-level minima and used oblique parameters STU and perturbative unitarity to constrain the parameter space. Furthermore, we discussed the phenomenological consequences of leading order flavor mixing quark Yukawa couplings through the b -> s gamma flavor violation process. We demonstrated that perturbative unitarity greatly constrains the model's parameters, while the beyond the Standard Model contributions to the b -> s gamma decay are naturally restricted by the symmetry.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Boris Kopeliovich, Jan Nemchik, Irina Potashnikova, Ivan Schmidt
Summary: Heavy and light quarks radiate differently in high-pT partonic collisions. The heavy quark jet shows a smaller fraction of initial quark energy and has a specific shape of fragmentation functions. The heavy-light mesons in the heavy quark jet carry the main fraction of jet momentum, indicating the presence of the dead-cone effect.
Article
Physics, Particles & Fields
Jordan Bernigaud, Ivo de Medeiros Varzielas, Miguel Levy, Jim Talbert
Summary: We reexamine the phenomenological predictions of the Universal Texture Zero (UTZ) model of flavour, updating them with improved experimental constraints and numerical analysis techniques. We have developed an in-house Markov Chain Monte Carlo (MCMC) algorithm to explore the UTZ's viable parameter space, considering leading and next-to-leading contributions. Our results provide reliable predictions for the poorly constrained leptonic CP-violating phases and ratio observables characterizing neutrino masses. We demonstrate that the UTZ remains a minimal, viable, and appealing theory of flavour, and highlight the potential of MCMC routines in examining multi-parameter flavour models.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
A. E. Carcamo Hernandez, L. Duarte, A. S. de Jesus, S. Kovalenko, F. S. Queiroz, C. Siqueira, Y. M. Oviedo-Torres, Y. Villamizar
Summary: We have observed flavor anomalies in recent years, and extended gauge sectors are commonly used to explain them. These theories beyond the Standard Model often involve flavor-changing interactions mediated by new vector bosons. By analyzing up-to-date data on meson mass differences, we establish lower bounds on the mass of vector mediators with two different parametrizations of quark mixing matrices. Our findings suggest that meson mass systems can provide more stringent constraints than high-energy colliders, and recent interpretations of the b -> s and R(D*) anomalies in terms of new physics are unlikely.
Article
Astronomy & Astrophysics
V. H. Binh, D. T. Binh, A. E. Carcamo Hernandez, D. T. Huong, D. V. Soa, H. N. Long
Summary: The scalar sector of the 3-3-1 model with an axionlike particle is studied in detail. In the model, there are two kinds of scalar fields: the bilepton scalars carrying lepton number two and the ordinary ones without lepton number. The mixing between these two kinds of scalar fields is not observed. The analysis shows that the model can accommodate scalar masses in the range of 100 GeV to 1 TeV, and it is consistent with the experimental constraints imposed by various processes.
Article
Astronomy & Astrophysics
Marat Siddikov, Ivan Schmidt
Summary: In this paper, we analyze the exclusive photoproduction of heavy quarkonia pairs in the collinear factorization framework. The amplitude of the J/psi - eta c quarkonia pair process is evaluated in the leading order of the strong coupling alpha s and expressed in terms of gluon generalized parton distributions (GPDs) in the proton. Numerical estimates in the kinematics of the Electron Ion Collider show that the cross section of the process is sufficiently large for experimental studies in the photoproduction regime.
Article
Astronomy & Astrophysics
Valery E. Lyubovitskij, Ivan Schmidt
Summary: This study derives the equations of motion for the bulk-to-boundary propagators of AdS boson and fermion fields in a soft-wall AdS/QCD model and solves them analytically. It focuses on studying transition form factors induced by these propagators for on-shell and off-shell hadrons, building upon previous research on form factors induced by propagators with total angular momentum J = 1.
Article
Astronomy & Astrophysics
Stanley J. Brodsky, Valery E. Lyubovitskij, Ivan Schmidt
Summary: This study revisits the physics of intrinsic heavy quarks using light-front holographic QCD and explores their impact on the electromagnetic properties of nucleons.
Article
Physics, Particles & Fields
A. E. Carcamo Hernandez, Hoang Ngoc Long, M. L. Mora-Urrutia, N. H. Thao, V. V. Vien
Summary: We propose a predictive model based on the gauge symmetry SU(3)(C) x SU(3)(L) x U(1)(X), supplemented by the D-4 family symmetry and auxiliary cyclic symmetries, which successfully explains the mass and mixing pattern of the observed SM fermions. The model incorporates a mechanism mediated by right-handed Majorana neutrinos to generate the masses of the light active neutrinos. It also accommodates various experimental values and constraints, such as the muon anomalous magnetic moment and the Higgs diphoton decay rate.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
A. E. Carcamo Hernandez, S. F. King, H. Lee
Summary: This study explores Z mediated flavor changing neutral currents within a model that explains hierarchical quark and lepton masses via a fourth vectorlike family and a specific scalar sector. The findings show that collider searches can place constraints on the model's parameter space by setting mass bounds on vectorlike lepton doublets. Additionally, rare decays and unitarity violation are considered to further constrain the quark sector of the model.
