A bstract The anomalies in the measurements of observables involving b → sμμ decays, namely R K , * P 5 ′ and B s ϕ may be addressed by adding lepton-universality-violating new physics contributions to effective operators $$ {\mathcal{O}}_{\mathcal{9}},{\mathcal{O}}_{10},{\mathcal{O}}_9^{\prime },{\mathcal{O}}_{10}^{\prime } <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>O</mml:mi> <mml:mn>9</mml:mn> </mml:msub> <mml:mo>,</mml:mo> <mml:mn>10</mml:mn>...

The recent measurement of ${R}_{{K}^{*}}$ is yet another hint new physics (NP) and supports the idea that it present in $b\ensuremath{\rightarrow}s{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decays. We perform a combined model-independent model-dependent analysis order to deduce properties this NP. Like others, we find NP must obey one two scenarios: (I) ${C}_{9}^{\ensuremath{\mu}\ensuremath{\mu}}(\mathrm{NP})&lt;0$ or (II)...

We present a Bayesian analysis of the implications for new physics in semileptonic $b\to s$ transitions after including measurements $R_K$ at LHCb and determinations $R_{K^*}$ $R_{K^{*+}}$ Belle. perform global fits with 1, 2, 4, 8 input Wilson coefficients, plus one CKM nuisance parameter to take into account uncertainties that are not factorizable. infer 68% 95.4% credibility regions marginalized posterior probability density all scenarios comparisons models pairs by calculating Bayes...

Recent measurements of $R_{D^*}$ have reduced tension with the Standard Model prediction. Taking all present data into account, we obtain values Wilson coefficients each new physics four-fermion operator a given Lorentz structure. We find that combined rule out most solutions based on scalar/pseudoscalar operators. By studying inter-relations between different solutions, there are only four allowed which operators $(V-A)$, linear combination $(V-A)$ and $(V+A)$, tensor demonstrate need for...

The confirmation of excess in ${R}_{{D}^{*}}$ at the LHCb is an indication lepton flavor nonuniversality. Various different new physics operators and their coupling strengths, which provide a good fit to ${R}_{D}$, ${R}_{{D}^{*}}$, ${q}^{2}$ spectra, were identified previously. In this work, we try find angular observables $\overline{B}\ensuremath{\rightarrow}{D}^{*}\ensuremath{\tau}\overline{\ensuremath{\nu}}$ enable us distinguish between these operators. We that ${D}^{*}$ polarization...

At present, there are several measurements of $B$ decays that exhibit discrepancies with the predictions SM, and suggest presence new physics (NP) in $b \to s \mu^+ \mu^-$ transitions. Many NP models have been proposed as explanations. These involve tree-level exchange a leptoquark (LQ) or flavor-changing $Z'$ boson. In this paper we examine whether it is possible to distinguish various via CP-violating effects $B K^{(*)} \mu^-$. Using fits data, find following results. Of all LQ models,...

Seagull Optimization Algorithm (SOA) is a metaheuristic algorithm that mimics the migrating and hunting behaviour of seagulls. SOA able to solve continuous real-life problems, but not discrete problems. The eight different binary versions are proposed in this paper. uses four transfer functions, S-shaped V-shaped, which used map search space into space. Twenty-five benchmark functions validate performance algorithm. statistical significance also analysed. Experimental results divulge...

Abstract We extend the Standard Model with general effective Hamiltonian for quark level transition $$c \rightarrow s \ell \nu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>c</mml:mi> <mml:mo>→</mml:mo> <mml:mi>s</mml:mi> <mml:mi>ℓ</mml:mi> <mml:mi>ν</mml:mi> </mml:mrow> </mml:math> a complete set of four fermion operators including right-handed neutrinos. The current experimental measurements in charm decays are compatible predictions and used to constrain...

The VuQ model involves the addition of a vector isosinglet up-type quark to standard model. In this full CKM mixing matrix is 4 X 3. Using present flavor-physics data, we perform fit matrix, looking for signals new physics (NP). We find that very strongly constrained. There are no hints NP in and any contributions loop-level flavor-changing b -> s, d s transitions small. can be significant enhancements branching ratios decays t u Z c Z, but these still below detection levels.

The measurements of the ratios $$R_{K^{(*)}}$$ along with $$R_{D^{(*)}}$$ hint towards lepton flavor non universality which is in disagreement standard model. In this work, we reanalyze four new physics models, are widely studied literature as a candidates for simultaneous explanations these measurements. These are, model like vector boson (VB), $$SU(2)_L$$ -singlet leptoquark ( $$U_1$$ ), -triplet scalar $$S_3$$ ) and triplet $$U_3$$ models. We assume coupling only to third generation weak...

Earlier this year, the Belle collaboration presented their new measurements of RD and RD⁎ using a method. These are consistent with Standard Model predictions, whereas global averages earlier had 4.1σ discrepancy. With inclusion data in averages, discrepancy comes down to 3.1σ. In work, we study physics solutions RD-RD⁎ anomaly allowed by reduction Among four fermion operators, which arise through single particle exchange, only (V−A) operator solution survives. We found three additional two...

Abstract We perform a model-independent global fit to all $$b \rightarrow s \ell $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>b</mml:mi> <mml:mo>→</mml:mo> <mml:mi>s</mml:mi> <mml:mi>ℓ</mml:mi> </mml:mrow> </mml:math> data in the light of recent measurements lepton flavour universality violating (LFUV) observables $$R_{K_S^0}$$ <mml:msub> <mml:mi>R</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:msub> ,...

We consider VuQ model which involves addition of a vector isosinglet t quark to the standard model.In this full CKM mixing matrix is 4 × 3. Using present flavor-physics data, we perform fit matrix.We find that current flavor data puts stringent constraints on model.There are no hints new physics in matrix.Furthermore, indicates any contributions b → s, d and s transitions very small.There can be significant enhancements branching ratios uZ cZ decays, but these still below detection levels.

One of the exciting results in flavor physics recent times is RD/RD⁎ puzzle. The measurements these ratios performed by B-factory experiments, BaBar and Belle, LHCb experiment are about 4σ away from Standard Model expectation. These indicate that mechanism b→cτν¯ decay not identical to b→c(μ/e)ν¯. This charge lepton universality violation particularly intriguing because decays occur at tree level Model. In particular, we expect a moderately large new contribution b→cτν¯. different types...

Parameter setting plays a vital role in the performance of optimization algorithms. Selecting right parameters for given problem is challenging task. In this paper, effect three on Optimized Multi-objective Particle Swarm Optimization algorithm analyzed. The include inertia, cognitive, and social. impact these evaluated five well-known benchmark test functions. convergence Pareto front analysis are also done OMOPSO. Experimental results show using metrics.

We consider a model where the standard is extended by addition of vector-like isosinglet down-type quark b'. perform chi square fit to flavor physics data and obtain preferred central values along with errors all elements measurable 3 X 4 mixing matrix. The indicates that new-physics parameters are consistent zero b' other three constrained be small. current rules out possibility detectable new signals in most observables. also investigate possible deviations Wtb couplings bottom coupling...

Polypyrrole (PPy) microwires synthesized via template assisted chemical polymerization method were investigated as gas sensors for ammonia (NH3) and hydrogen sulphide (H2S) toxic gases. The sensor was fabricated by a facile technique in which polypyrrole packed between pair of indium tin oxide (ITO) coated glass slides acting electrodes. Electrical conductivity sensor, containing microwires, examined with the exposure gases at room temperature. It observed that detect presence terms change...

At Moriond 2019, Belle collaboration announced their new measurements on $R_D$ and $R_{D^*}$ which are in agreement with Standard Model (SM) predictions within $1.2\sigma$. After inclusion of these measurements, the discrepancy between world averages SM $R_D$-$R_{D^*}$ comes down from $4.1\sigma$ to $3.1\sigma$. Here we do a global fit by taking all $b\rightarrow c\tau\bar{\nu}$ transition. We find that there seven allowed physics solutions, each different Lorentz structure. Further show it...

Abstract In this work, we study the impact of $$b \rightarrow s \ell $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>b</mml:mi><mml:mo>→</mml:mo><mml:mi>s</mml:mi><mml:mi>ℓ</mml:mi><mml:mi>ℓ</mml:mi></mml:mrow></mml:math> , $$B_s - \bar{B_s}$$...

We have developed a relativistic model for pulsar radio emission and polarization by taking into account of detailed geometry region, rotation modulation. The sparks activity on the polar cap leads to plasma columns in region modulated emission. By considering bunches streaming out along rotating dipolar field lines as source curvature radiation, deduced state radiation terms Stokes parameters. simulated set typical pulse profiles, analyzed role viewing geometry, modulation profiles. Our...

We perform a model independent analysis of new physics in ${B}_{s}^{*}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay. intend to identify operator(s) which can provide large enhancement the branching ratio above its standard prediction. For this, we consider form vector, axial-vector, scalar and pseudoscalar operators. find that operators do not contribute ${B}_{s}^{*}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$....

In this study, a novel quantum-based multi-objective is proposed using Schrödinger equations. The two new operations namely weighted cluster centroid computation and threshold setting are also introduced to refine centroids. A fitness function strategy for efficient searching. technique compared with various well-known approaches. Experimental outcomes show that the quantum approach outperforms other existing