In this study, we investigate muon $g-2$, $R_{K^{(*)}}$, and $R_{D^{(*)}}$ anomalies in a specific model with one doublet, triplet, singlet scalar leptoquark (LQ). When the strict limits from $\ell' \to \ell γ$, $ΔB=2$, $B_{s}\to μ^+ μ^-$, $B^+ K^+ ν\barν$ processes are considered, it is difficult to use LQ explain all of due strong correlations among constraints observables. After ignoring small couplings, $g-2$ can be explained by doublet alone $m_t$ enhancement, whereas measured...

We propose a model based on modular $A_4$ symmetry containing dark matter candidate, realizing radiatively induced neutrino mass at one-loop level. One finds that stability of candidate can be assured by nonzero value weight and heavy neutral fermion hierarchies, which include under the triplet, are uniquely determined; $M_X\ll M_2<M_3$. Therefore we clearly identify single field discriminate from other models with symmetry. Then discuss several phenomenological aspects show predictions...

ATLAS and CMS recently showed the first results from run 2 of Large Hadron Collider (LHC) at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$. A resonant bump a mass around 750 GeV in diphoton invariant spectrum was indicated corresponding production cross section is 3--10 fb. Motivated by LHC excess, we propose that possible resonance candidate Higgs singlet. To produce singlet via gluon-gluon fusion process, embed framework vector-like triplet quark (VLTQ) model. As result, decaying to final...

We propose a minimal extention of the Standard Model where neutrino masses are generated radiatively at one-loop level via Scotogenic scanario. The model is augmented with $A_4$ modular symmetry as scotogenic and flavor symmetry. With number parameters, makes predictions for oscillation data, Majorana Dirac phases, dark matter characteristics, neutrinoless double beta decay.

We discuss type II seesaw models adopting modular ${A}_{4}$ symmetry in a supersymmetric framework. In our approach, the are classified by assignment of representations and weights for leptons triplet Higgs fields. Then neutrino mass matrix is characterized modulus $\ensuremath{\tau}$ two free parameters. Carrying out numerical analysis, we find allowed parameter sets which can fit oscillation data. For sets, obtain predictions sector such as $CP$ violating phases lightest mass. Finally,...

We discuss an inverse seesaw model based on right-handed fermion specific U(1) gauge symmetry and A4-modular symmetry. These symmetries forbid unnecessary terms restrict structures of Yukawa interactions which are relevant to mechanism. Then we can obtain some predictions in neutrino sector such as Dirac-CP phase sum mass, shown by our numerical analysis. Besides the relation among masses heavy pseudo-Dirac be obtained since it is also restricted modular implications lepton flavor violation...

We propose a model with radiatively induced neutrino mass at two-loop level, applying modular A4 symmetry. The matrix is formulated where the structure of associated couplings restricted by Then we show several predictions in lepton sector, satisfying flavor violations as well oscillation data. also discuss muon anomalous magnetic moment and briefly comment on dark matter candidate.

Motivated by the observation that tiny neutrino mass cannot be explained within framework of Standard Model, we consider extra gauge extended scenarios in which masses are generated through seesaw mechanism. These equipped with a beyond Model neutral boson called <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>Z</a:mi><a:mo>′</a:mo></a:msup></a:math> general <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>U</c:mi><c:mo...

Doubly charged Higgs bosons are predicted in many new physics models with an extended sector that contains a triplet field. Current experimental searches have been focusing mainly on the scenario which same-sign dilepton decay modes dominant ones. We study where vacuum expectation value of field is sufficiently large so associated dominantly to pair weak gauge instead. A detailed simulation signal and backgrounds performed for CERN Large Hadron Collider (LHC) at collision energy 8 TeV 14...

The $Z'$-gauge boson in an $U(1)_{L_\mu-L_\tau}$ gauge symmetry has two interesting features: one is its vector couplings to the charged leptons, and other decoupling from electron. Based on these properties, we investigate feasibility simultaneously resolve $R_{K^{(*)}} = BR(B\to K^{(*)} \mu^+ \mu^-)/BR(B\to e^+ e^-)$ $R_{D^{(*)}} BR(\bar B\to D^{(*)} \tau \bar\nu_\tau)/BR(\bar \ell \bar\nu_\ell)$ anomalies model, where former expected arise $Z'$-penguin-induced $b\to s \mu^-$ process...

We propose a scenario to generate flavor violating ${Z}^{\ensuremath{'}}$ interactions at one-loop level by introducing $U(1{)}_{\ensuremath{\mu}\ensuremath{-}\ensuremath{\tau}}$ gauge symmetry, extra vectorlike quark doublets ${Q}_{a}^{\ensuremath{'}}$, and singlet scalar $\ensuremath{\chi}$. Both ${Q}_{a}^{\ensuremath{'}}$ $\ensuremath{\chi}$ are charged under carry odd dark ${Z}_{2}$ parity. Assuming that is the matter (DM) of Universe imposing various constraints from search, physics,...

We investigate a model with local ${\mathrm{U}(1)}_{B\ensuremath{-}L}$ and discrete ${Z}_{2}$ symmetries where two types of weak isospin singlet neutrinos, vectorlike charged leptons, exotic scalar fields are introduced. The linear seesaw mechanism is induced at the one-loop level through Yukawa interactions associated standard leptons fields. also discuss lepton flavor violation muon anomalous dipole magnetic moment by new interaction. In addition, our has dark matter candidate which...

We propose a four-loop induced radiative neutrino mass model inspired by the diphoton excess at 750 GeV recently reported ATLAS and CMS, in which sizable is obtained via photon fusion introducing multi doubly-charged scalar bosons. Also we discuss muon anomalous magnetic moment, dark matter candidate. The main process to explain observed relic density relies on final state of new particle GeV. Finally show numerical results obtain allowed region several physical values our model.

We study the effect of charged-Higgs-induced chromomagnetic operator, $Q_{8G}(-) \equiv \bar s \sigma^{\mu \nu} T^a \gamma_5 d G^a_{\mu \nu}$, on Kaon direct CP violation $Re(\epsilon'/\epsilon)$. Using matrix element $\langle \pi | O_{8G}(-) K^0 \rangle$ recently obtained by a large $N_c$ dual QCD approach, we find that if Kobayashi-Maskawa phase is origin violation, gluon penguin dipole operator in type-III two-Higgs-doublet model can explain measured $Re(\epsilon'/\epsilon)$ when...

We propose a model with radiatively induced neutrino mass at two-loop level, applying modular $A_4$ symmetry. The matrix is formulated where the structure of associated couplings are restricted by Then we show several predictions in lepton sector, satisfying flavor violations as well oscillation data. also discuss muon anomalous magnetic moment and briefly comment on dark matter candidate.

A bstract We propose an interesting assignment of positive modular weights for fields in a non-Abelian discrete flavor symmetry. By this assignment, we can construct inverse seesaw and linear models without any additional symmetries which possess good testability current experiments. At first, discuss possibilities from theoretical point view. Then show concrete examples scenarios applying 4 symmetry as demonstrate some predictions well consistency with experimental results such neutrino...

Abstract We propose a simple model to obtain sizable muon anomalous magnetic dipole moment (muon $g-2$) introducing several $SU(2)_L$ multiplet fields without any additional symmetries. The neutrino mass matrix is simply induced via type-II seesaw scenario in terms of triplet Higgs with $U(1)_Y$ hypercharge 1. In addition, we introduce an quartet vector fermion $1/2$ and scalar $3/2$ hypercharge. plays crucial role explaining $g-2$ causing the chiral flip inside loop diagram mixing between...

Abstract We discuss neutrino sector in models with two Higgs doublet and one singlet scalar fields under local $U(1)_{L_\alpha- L_\beta}$ symmetry.&amp;#xD;A mass matrix is formulated for these where the generated via type-I seesaw mechanism introducing right-handed neutrinos.&amp;#xD;The has more degrees of freedom compared to minimal scenarios which have only new field, but its structure still restricted by symmetry.&amp;#xD;Then it find that sum can be lower than easier satisfy observed...

We discuss multi-<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>Z</a:mi><a:mo>′</a:mo></a:msup></a:math> signatures coming from decays of Higgs bosons in models with a spontaneously broken <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>U</c:mi><c:mo stretchy="false">(</c:mo><c:mn>1</c:mn><c:msup><c:mo stretchy="false">)</c:mo><c:mo>′</c:mo></c:msup></c:math> symmetry, which can be observed as “lepton jets” or multilepton final...

We investigate multi-lepton jet events from the decay of 125 GeV Higgs boson ($h$) into quadruple new gauge bosons $(Z')$ at LHC. Such an exotic is realized via process $h \to \phi Z'Z'Z'Z'$ with scalar $\phi$ in models additional $U(1)$ symmetry. Charged leptons coming $Z'$ tend to be observed as lepton-jets rather than isolated when masses and are smaller ${\cal O}$(10) GeV, because highly-boosted effects. Performing signal background analyses, we find that branching ratio 4Z'$ maximally...

Abstract We study a Zee model applying modular $$A_4$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>A</mml:mi> <mml:mn>4</mml:mn> </mml:msub> </mml:math> symmetry in supersymmetry framework, where we construct our lepton as minimum weight possible. show predictions on phases and neutrino masses through numerical analysis. find that can fit both normal inverted hierarchy cases of mass. The observables are shown obtain more constrained allowed region the case.

Abstract We discuss almost degenerate vector dark matter and photon that are induced from hidden SU(2)H gauge sector where it is spontaneously broken by vacuum expectation value of doublet. Kinetic mixing between U(1)Y fields can be generated introducing dimension six operator realizing interactions. In estimating relic density we focus on the process in which annihilate into photons, search for region mass coupling observed density. then constraints physics, thermalization direct detection...

Abstract We propose a radiatively induced linear seesaw model that is perfectly realized at leading order by modular A4 symmetry. Because this group also has flavor symmetry, we obtain some predictions concentrating on two specific regions nearby fixed points τ = ω and i. Through our numerical chi square analysis, show for each the case depending neutrino mass ordering; normal inverted one.1