The High-Luminosity Large Hadron Collider (HL-LHC) promises unprecedented sensitivityto Standard Model (SM) processes and new physics scenarios. This study focuseson the production of pp → W+Z, with subsequent decays W+ ℓ+ νe Z ℓ−.We explore impact planned detector upgrades on precision measurements andsensitivity to Beyond (BSM) phenomena. Using insights from simulations,this paper highlights role advanced detectors in improving reconstruction,reducing uncertainties, extending discovery...

The present data on a number of observables in $b\to s\mu^+\mu^-$ processes manifest some tensions with the standard model (SM). Assuming that these anomalies have new physics origin, we consider possibility $Z'$ boson is responsible for them. We further assume its interactions quarks also affect rare nonleptonic decays $\bar B_s^0$ meson which are purely isospin-violating and tend to be dominated by electroweak-penguin contributions, namely B_s^0\to(\eta,\eta',\phi)(\pi^0,\rho^0)$. Most not...

We investigate the phenomenology of an extension Standard Model (SM) by a non-Abelian gauge group $\mathrm{SU}(2{)}_{\mathrm{HS}}$ where all SM particles are singlets under this group, and new scalar representation $\ensuremath{\phi}$ that is singlet doublet $\mathrm{SU}(2{)}_{\mathrm{HS}}$. In model, dark matter (DM) candidates three mass-degenerate photons ${A}_{i}$ ($i=1$, 2, 3) $\mathrm{SU}(2{)}_{\mathrm{HS}}$, hidden sector interacts with through Higgs portal interactions. Consequently,...

We consider some implications of X-ray lines from certain astronomical objects as potential effects dark matter decay in the context scotogenic model, where neutrinos acquire mass radiatively via one-loop interactions with matter. As an example, we focus on 3.5 keV line recently detected spectra galaxy clusters, assuming that it stands future scrutiny. explore scenario which originates slow fermionic model. After obtaining a number benchmark points representing parameter space consistent new...

We study some implications of the presence two new scalar weak doublets beyond standard model which have zero vacuum expectation values and are charged under an extra Abelian gauge symmetry. The additional sector does not couple directly to standard-model particles. investigate specifically effects scalars on oblique electroweak parameters interactions 125 GeV Higgs boson, especially its decay modes $h\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma},\ensuremath{\gamma}Z$...

A bstract We investigate the possibility that scalar leptoquarks generate consequential effects on flavor-changing neutral-current decays of charmed hadrons into final states with missing energy "Image missing"<!-- image only, no MathML or LaTex --> carried away by either standard model sterile neutrinos. focus scenarios involving R 2 , $$ {\tilde{R}}_2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mover> <mml:mi>R</mml:mi> <mml:mo>˜</mml:mo> </mml:mover>...

We compute the supersymmetry (SUSY) effective Hamiltonian that describes $|\ensuremath{\Delta}S|=1$ semileptonic decays of tau leptons. provide analytical expressions for supersymmetric contribution to $\ensuremath{\tau}\ensuremath{\rightarrow}u\overline{s}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ transition in mass insertion approximation. show SUSY contributions may enhance $CP$ asymmetry $\ensuremath{\tau}\ensuremath{\rightarrow}K\ensuremath{\pi}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ by...

In this paper, we study the Cabibbo favored nonleptonic ${D}^{0}$ decays into ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decays. First show that, within Standard Model (SM), corresponding charge conjugation and parity ($CP$) asymmetry is strongly suppressed out of experimental range, even taking account large strong phases coming from final state interactions. We also that although new physics models with extra sequential generation can enhance $CP$ by a few orders magnitude, resulting...

We study the decay modes B¯s→ϕπ0 and B¯s→ϕρ0 within frameworks of two-Higgs doublet models type-II type-III. adopt in our Soft Collinear Effective Theory as a framework for calculation amplitudes. derive contributions charged Higgs mediation to weak effective Hamiltonian governing processes both models. Moreover, we analyze effect on Wilson coefficients electroweak penguins branching ratios decays. show that type-III corresponding can be enhanced due from leading into enhancement find that,...

In this paper we study the direct $CP$ asymmetry of doubly Cabibbo-suppressed decay mode ${D}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ within standard model and two Higgs doublet with generic Yukawa structure. derive corrections to tree level amplitude, generated from box dipenguin diagrams, required for generating weak violating phases. We show that these phases are so tiny leading a order ${10}^{\ensuremath{-}9}$. Regarding structure Wilson coefficients...

Abstract We investigate $$R_D$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>R</mml:mi> <mml:mi>D</mml:mi> </mml:msub> </mml:math> and $$R_{D^*}$$ <mml:msup> <mml:mo>∗</mml:mo> </mml:msup> anomalies in a low scale left–right symmetric model based on $$SU(3)_C\times SU(2)_L\times SU(2)_R\times U(1)_{B-L}$$ <mml:mrow> <mml:mi>S</mml:mi> <mml:mi>U</mml:mi> <mml:mo>(</mml:mo> <mml:mn>3</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>C</mml:mi> <mml:mo>×</mml:mo>...

We show that the scalar leptoquark Yukawa couplings generate a significant lepton flavour violation. compute light contributions to branching ratios (Br) of violating (LFV) decays $\ell \to \ell_i \ell_j \bar{\ell}_j$ and \rightarrow \ell^{\prime} γ$ with (i,j = e,$μ$). discuss role relevant input parameters these decay rates which are ($h_{a\ell}$) ($a=u,c,t$), mass $M_{S_{1}}$ mixing angle $\sin2θ_{LQ}$. investigate experimental limits from $(g-2)_μ$, $μ-e$ conversion $π\to e ν_e, μν_μ$...

We analyze the $CP$ violation in semileptonic $|\ensuremath{\Delta}S|=1$ $\ensuremath{\tau}$ decays supersymmetric extensions of standard model with $R$ parity violating term. show that asymmetry decay is enhanced significantly and current experimental limits obtained by CLEO collaborations can be easily accommodated. argue observing would a clear evidence for supersymmetry extension model.

We study the theoretical features in relation to dynamical mass generation and symmetry breaking for recently proposed holomorphic supersymmetric Nambu--Jona-Lasinio model. The basic model has two different chiral superfields (multiplets) with a strongly coupled dimension five four-superfield interaction. In addition possibility of Dirac between pair established earlier, we show here new option Majorana masses each superfield. also give first look at what condition may prefer over mass,...

The anomalous results of recent measurements on various $b\ensuremath{\rightarrow}s{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ processes could be initial evidence physics beyond the standard model (SM). Assuming this to case, we entertain possibility that underlying new also affects rare nonleptonic decays ${\overline{B}}_{s}^{0}$ meson. We consider in particular arising from interactions a heavy ${Z}^{\ensuremath{'}}$ boson and investigate their influence decay modes...

The decay modes $$\bar{B}_s \rightarrow \pi ^0(\rho ^0 )\,\eta ^{(')} $$ are dominated by electroweak penguins that small in the standard model. In this work we investigate contributions to these from a model with an additional $$U(1)'$$ gauge symmetry and show there effects on branching ratios of . scenario model, where $$Z^\prime couplings left-handed quarks vanish, maximum enhancement occurs ratio $$\bar{B}^0_s\rightarrow \,\pi ^0\,\eta '$$ it can reach 6 times SM prediction. On other...

We introduce a simple model of dynamical supersymmetry breaking. It is like supersymmetric version Nambu--Jona-Lasinio with spin one composite. The simplest the as presented here has single chiral superfield (multiplet) four-superfield interaction. latter structure square magnitude square. A vacuum condensate illustrated to develop giving rise breaking soft mass term for superfield. report also effective theory picture real composite, illustrating matching potential analysis and solution...

Abstract A general analysis of possible violation CP in processes like $$\tau \rightarrow K\pi \nu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>τ</mml:mi><mml:mo>→</mml:mo><mml:mi>K</mml:mi><mml:mi>π</mml:mi><mml:mi>ν</mml:mi></mml:mrow></mml:math> , for unpolarized xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>τ</mml:mi></mml:math> is presented. In this paper, we derive the new contributions to effective Hamiltonian governs $$\vert \Delta S \vert...

This is a report on our newly proposed model of dynamical supersymmetry breaking with some details the analysis involved. The in simplest version has only chiral superfield (multiplet), strong four-superfield interaction Kähler potential that induces real two-superfield composite vacuum condensate. latter parts, which we show to bear nontrivial solution following basically standard nonperturbative for Nambu--Jona-Lasinio type setting. spin one component but otherwise quite unconventional. We...

We review the CP violation in semileptonic |ΔS| = 1 τ-decays supersymmetric extensions of standard model (SM). show that Within SUSY models with conserved R parity, asymmetry τ → kπν is below current experimental limits, although it enhanced by several order magnitude than SM results. also study impact lepton terms parity violation. τ-decay significantly and limits obtained CLEO collaborations can be easily accommodated.