We present a unified explanation for the $B$-decay anomalies in ${R}_{{D}^{(*)}}$ and ${R}_{K}$ together with anomalous muon magnetic moment, consistent constraints from current measurements of leptonic decay rates ${D}^{0}\ensuremath{-}{\overline{D}}^{0}$, ${B}_{s}^{0}\ensuremath{-}{\overline{B}}_{s}^{0}$ mixings, within framework minimal left-right symmetric gauge theory motivated by one low-energy subgroups ${E}_{6}$ naturally accommodating leptoquarks.

A bstract Observation of lepton number violation would represent a groundbreaking discovery with profound consequences for fundamental physics and as such, it has motivated an extensive experimental program searching neutrinoless double beta decay. However, the can be also tested by variety other observables. We focus on possibilities probing this symmetry within framework Standard Model Effective Field Theory (SMEFT) beyond minimal dimension-5. Specifically, we study bounds ∆ L = 2...

The recent diphoton excess signal at an invariant mass of 750 GeV can be interpreted in the framework left-right symmetric models with additional scalar singlets and vector-like fermions. We propose a minimal scenario for such purpose. Extending LRSM to include these new fermionic fields, on other hand, results interesting phenomenological implications fermion masses mixing. Furthermore, existence fermions also have baryogenesis dark matter sector. introduction real bi-triplet which contains...

A bstract Motivated by a simultaneous explanation of the apparent discrepancies in light charged lepton anomalous magnetic dipole moments, and internal pair creation 8 Be nuclear transitions, we explore simple New Physics model, based on an extension Standard Model gauge group U(1) B−L . The model further includes heavy vector-like fermion fields, as well extra scalar responsible for low-scale breaking , which gives rise to Z′ boson. new fields currents allow explain while being consistent...

In the presence of transition magnetic moments between active and sterile neutrinos, search for a Primakoff upscattering process at coherent elastic neutrino-nucleus scattering (CE$\nu$NS) experiments can provide stringent constraints on neutrino moment. We show that radiative with an emitted photon in final state induce novel coincidence signal CE$\nu$NS also probe beyond existing limits. Furthermore, differential distributions such mode potentially be sensitive to Dirac vs. Majorana nature...

Recent experimental results from the LHCb, BaBar and Belle collaborations on semitauonic decays of $B$ meson, $\bar{B}\rightarrow D^{(\ast)}\tau \bar{\nu}$, showing a significant deviation Standard Model (SM), hint towards new physics scenario beyond SM. In this work, we show that these enhanced decay rates can be explained within framework $E_{6}$ motivated Alternative Left-Right Symmetric (ALRSM), which has been successful in explaining recent CMS excesses feature accommodating high scale...

The LHCb has measured the ratios of $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ to $B\ensuremath{\rightarrow}{K}^{*}{e}^{+}{e}^{\ensuremath{-}}$ branching fractions in two dilepton invariant mass squared bins, which deviate from standard model predictions by approximately $2.5\ensuremath{\sigma}$. These new measurements strengthen hint lepton flavor universality breaking was observed earlier...

We propose a possible explanation for the recent diphoton excess reported by ATLAS and CMS Collaborations at around 750 GeV invariant mass within framework of ${E}_{6}$-motivated alternative left-right symmetric model, which is capable addressing $B$ decay anomalies in flavor sector, $eejj$ $e{\overline{)p}}_{T}jj$ excesses run 1 LHC, high-scale leptogenesis. find that gluon-gluon fusion can give observed production rate resonance, $\stackrel{\texttildelow{}}{n}$, through loop scalar...

Motivated by the recent Belle II result indicating a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>2.7</a:mn><a:mi>σ</a:mi></a:math> excess of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>B</c:mi><c:mo>+</c:mo></c:msup><c:mo stretchy="false">→</c:mo><c:msup><c:mi>K</c:mi><c:mo>+</c:mo></c:msup><c:mo>+</c:mo><c:msub><c:mi>E</c:mi><c:mrow><c:mi>miss</c:mi></c:mrow></c:msub></c:math> events compared to Standard Model (SM)...

We point out that the discovery of a right-handed charged gauge boson $W_R^\pm$ with mass around few TeV, for example through signal two leptons and jets has been reported by CMS to have 2.8$\sigma$ local excess or resonance decaying into pair standard model (SM) bosons showing 3.4$\sigma$ (2.5$\sigma$ global) ATLAS search, will rule all possibilities leptogenesis in classes left-right symmetric extensions Standard Model (LRSM) both triplet doublet Higgs scalars due unavoidable fast mediated...

A bstract Motivated by an explanation of the $$ {R}_{K^{\left(*\right)}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:msup> <mml:mi>K</mml:mi> <mml:mfenced> <mml:mo>*</mml:mo> </mml:mfenced> </mml:msup> </mml:msub> </mml:math> anomalies, we propose a Standard Model extension via two scalar SU(2) L triplet leptoquarks and three generations Majorana fermions. The gauge group is reinforced Z 2 symmetry, ensuring stability lightest -odd particle,...

In the case where Standard Model is extended by one heavy Majorana fermion, branching fractions of semileptonic meson decays into same-sign and opposite-sign dileptons are expected to be same order. As we discuss here, this need not in extensions at least two sterile fermions, due possible destructive constructive interferences that might arise. Depending on $CP$ violating phases, can have an enhancement lepton number modes suppression conserving ones (and vice-versa). We explore for first...

We consider the possibility of grand unification SU(3)c⊗SU(3)L⊗U(1)X model in an SU(6) gauge group. Two possibilities arise. Unlike other conventional unified theories, one can embed 331 as a subgroup such that different multiplets appear with multiplicities. Such scenario may emerge from flux breaking group E(6) F-theory GUT. This provides new ways achieving coupling models while providing radiative origin neutrino masses. Alternatively, sequential variant fit within minimal unification,...

We discuss a class of left-right symmetric theories with universal seesaw mechanism for fermion masses and mixing the implications neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay where neutrino are governed by natural type-II dominance. The scalar sector consists left- right-handed Higgs doublets triplets, while conventional bidoublet is absent in this scenario. use to implement electroweak symmetry breaking. On other hand, triplets induced vacuum...

We propose an alternative formulation of a left-right symmetric model where the difference between baryon number ($B$) and lepton ($L$) remains unbroken symmetry. This is unlike conventional formulation, $B\ensuremath{-}L$ promoted to local symmetry broken explicitly in order generate Majorana neutrino masses. In our case global after breaking, allowing only Dirac mass terms for neutrinos. addition parity restoration at some high scale, this provides natural framework explain as anomaly-free...

We consider the possibility of gauge coupling unification within simplest realizations $\mathrm{SU}(3{)}_{\mathrm{c}}\ifmmode\times\else\texttimes\fi{}\mathrm{SU}(3{)}_{\mathrm{L}}\ifmmode\times\else\texttimes\fi{}\mathrm{SU}(3{)}_{\mathrm{R}}\ifmmode\times\else\texttimes\fi{}\mathrm{U}(1{)}_{\mathrm{X}}$ theory. present a first exploration renormalization group equations governing ``bottom-up'' evolution couplings in generic model with free normalization for generators. Interestingly, we...

We show that superstring-inspired ${E}_{6}$ models can explain both the recently detected excess $eejj$ and $e{\overline{)p}}_{T}jj$ signals at CMS also allow for leptogenesis. Working in an $R$-parity conserving, low-energy supersymmetric effective model, we events be produced via decay of exotic sleptons Alternative Left-Right Symmetric Model ${E}_{6}$, which accommodate leptogenesis a high scale. On other hand, either or decays right-handed gauge bosons, but some these scenarios may not...

In order to simultaneously account for both $R_{D^{(\ast)}}$ and $R_{K^{(\ast)}}$ anomalies in $B$-decays, we consider an extension of the Standard Model by a single vector leptoquark field, study how one can achieve required lepton flavour non-universality, starting from priori universal gauge couplings. While unitary quark-lepton mixing induced $SU(2)_L$ breaking is insufficient, find that effectively nonunitary mixings hold key address anomalies. As intermediate step towards various...

We investigate forces induced by the exchange of two light neutrinos between Standard Model (SM) fermions in presence effective operators parametrising physics beyond SM. first set up a general framework which we derive long-range potential mediated weakly interacting SM, retaining both spin-independent and spin-dependent terms. then neutrino-mediated potentials when there are vector, scalar tensor non-standard interactions present as well an exotic neutrino magnetic moment. Examining...

A bstract Building up on previous work we propose a Dark Matter (DM) model with gauged matter parity and dynamical gauge coupling unification, driven by the same physics responsible for scotogenic neutrino mass generation. Our construction is based extended group SU(3) c ⊗ L U(1) X N , whose spontaneous breaking leaves residual conserved parity, M P stabilizing DM particle candidates of model. The key role played Majorana -octet leptons, allowing successful unification one-loop Theoretical...

In view of the emerging hints for violation lepton flavour universality in several $B$-meson decays, we conduct a model-independent study (effective field theory approach) well-motivated new physics scenarios. Taking into account most recent LHCb data, provide updates to Wilson coefficient fits numerous popular hypotheses. We also consider promising model vector leptoquarks, which addition explaining decay anomalies ($R_{K^{(*)}}$ and $R_{D^{(*)}}$) would have an extensive impact...

We study a cogenesis mechanism in which the observed baryon asymmetry of universe and dark matter abundance can be produced simultaneously at low reheating temperature without violating number fundamental interactions. In particular, we consider model realized context type IIB large volume string compactifications. The superfields this include additional pairs color triplet singlet addition to Minimal Supersymmetric Standard Model (MSSM) superfields. Assuming that mass fermions is O(GeV)...

We review the non-supersymmetric (Extended) Left-Right Symmetric Models (LRSM) and low energy E6-based models to investigate if they can explain both recently detected excess eejj signal at CMS leptogenesis. The be explained from decay of right-handed gauge bosons (WR) with mass ∼ TeV in certain variants LRSM (with gL≠ gR). However such scenarios not accommodate high-scale Other attempts have been made leptogenesis while keeping WR almost within reach LHC by considering resonant scenario...

We present a minimal framework of $U(1)_{B-L}$ gauge extension the Standard Model explaining dark matter abundance and matter-antimatter asymmetry simultaneously through an attractive mechanism TeV scale WIMPy leptogenesis, testable at current next generation colliders. This can also explain small neutrino masses via radiative mechanism. One key predictions this model is enhanced rate for lepton flavor violating decay $μ\rightarrow e γ$ within sensitivity reach experiments.