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) ${C}_{9}^{\ensuremath{\mu}\ensuremath{\mu}}(\mathrm{NP})<0$ or (II)...

We investigate the implications of latest LHCb measurement $R_K$ for NP explanations $B$ anomalies. The previous data could be explained if $b \to s \mu^+ \mu^-$ is in (I) $C_{9,{\rm NP}}^{\mu\mu}$ or (II) NP}}^{\mu\mu} = -C_{10,{\rm NP}}^{\mu\mu}$, with scenario providing a better explanation than (II). This continues to hold new $R_K$. However, both scenarios, this leads slight tension $O(1\sigma)$ between separate fits and $R_{K^{(*)}}$ data. In paper, we whether can alleviated addition...

There are four models of tree-level new physics (NP) that can potentially simultaneously explain the $b\ensuremath{\rightarrow}s{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ and $b\ensuremath{\rightarrow}c{\ensuremath{\tau}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}$ anomalies. They ${S}_{3}$, ${U}_{3}$ ${U}_{1}$ leptoquarks (LQs), a triplet standard-model-like vector bosons ($VB$'s). Under theoretical assumption NP couples predominantly to third generation, previous analyses...

We present a global likelihood function in the space of dimension-six Wilson coefficients Standard Model Effective Field Theory (SMEFT). The includes contributions from flavour-changing neutral current B decays, lepton flavour universality tests charged- and neutral-current K meson-antimeson mixing observables K, B, D systems, direct CP violation -> {\pi}{\pi}, charged violating tau, muon electroweak precision on Z W poles, anomalous magnetic moments electron, muon, several other...

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...

wilson is a Python library for matching and running Wilson coefficients of higher-dimensional operators beyond the Standard Model. Provided with numerical values at high new physics scale, it automatically performs renormalization group evolution within Model effective field theory (SMEFT), onto weak (WET) electroweak QCD/QED below scale down to hadronic scales relevant low-energy precision tests. The encompasses complete set dimension-six in both SMEFT WET. program builds on coefficient...

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,...

Basis transformations often involve Fierz and other relations that are only valid in $D=4$ dimensions. In general $D$ spacetime dimensions, however, evanescent operators have to be introduced order preserve such identities. Such contribute one-loop basis as well two-loop renormalization group running. We present a simple procedure on how systematically change at the level by obtaining shifts due operators. As an example we apply this method derive transformation from Buras, Misiak Urban...

We point out that, although SMEFT is constructed to be model-independent, this holds only if complete sets of operators are used. analyses that focus on subsets semi-model-independent. They probe classes ultraviolet models, opening a window the underlying new physics. This model dependence originates from need choose weak basis, usually taken down or up basis. naturally leads introduction third generic which interpolates between above two bases. Due its generality, we argue basis most...

The measurements of $R_{K}$ and $R_K^{*}$ provide hints for the violation lepton universality. However, it is generally difficult to explain $R_{K^*}$ measurement in low $q^2$ range, $0.045 \le q^2 1.1$ GeV$^2$. Light mediators offer a solution by making Wilson coefficients dependent. We check if new nonuniversal interactions mediated scalar ($S$) or vector particle ($Z^\prime$) mass between $10-200$ MeV can reproduce data. find that 25 $Z^\prime$ with $q^2$-dependent $b-s$ coupling couples...

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...

At present, there are outstanding discrepancies between standard model predictions and measurements of the muon's $g\ensuremath{-}2$ several $B$-meson properties. We resolve these anomalies by considering a two-Higgs-doublet extended to include leptoquarks dark Higgs boson $S$. The modify decays also induce an $S\ensuremath{\gamma}\ensuremath{\gamma}$ coupling, which contributes through Barr-Zee diagram. show that, for TeV-scale masses ${m}_{S}\ensuremath{\sim}10--200\text{ }\text{...

A bstract We present a model-independent anatomy of the ∆ F = 2 transitions K 0 − $$ {\overline{K}}^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mover> <mml:mi>K</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mn>0</mml:mn> </mml:msup> </mml:math> , B s,d {\overline{B}}_{s,d} <mml:msub> <mml:mi>B</mml:mi> <mml:mrow> <mml:mi>s</mml:mi> <mml:mo>,</mml:mo> <mml:mi>d</mml:mi> </mml:mrow> </mml:msub> and D {\overline{D}}^0 <mml:mi>D</mml:mi> in context Standard Model...

At present, the measurements of some observables in $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ and ${B}_{s}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decays, ${R}_{{K}^{(*)}}\ensuremath{\equiv}\mathcal{B}(B\ensuremath{\rightarrow}{K}^{(*)}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})/\mathcal{B}(B\ensuremath{\rightarrow}{K}^{(*)}{e}^{+}{e}^{\ensuremath{-}})$, are...

The measurements of the Cabibbo-Kobayashi-Maskawa (CKM) elements can be contaminated by new-physics effects. We point out that purely leptonic operators at high scale influence semileptonic $K$ decays and nuclear beta decay through renormalization group (RG) running, hence ${V}_{us}$. Interestingly, this mechanism, a single six-dimensional effective operator ${O}_{\ensuremath{\ell}\ensuremath{\ell}}$ alleviate tension due to Cabibbo angle anomaly, generating desired low RG running. When...

The next-to-minimal supersymmetric Standard Model (NMSSM) with an extended Higgs sector offers at least one boson as the (SM)-like a mass around 125 GeV. In this work, we revisit spectrum and couplings of non-SM-like bosons taking into consideration most relevant constraints identify parameter space. discovery potential these bosons, apart from their masses, is guided by gauge fermions which are very much space sensitive. We evaluate rates productions LHC for variety decay channels in...

Recently the RBC-UKQCD lattice collaboration presented new results for hadronic matrix elements relevant ratio $\varepsilon'/\varepsilon$ in Standard Model (SM). With present knowledge of Wilson coefficients and isospin breaking effects there is still much room physics (NP) contributions to which could both enhance or suppress this agree with data. The SM value $K^0-\bar K^0$ mass difference $\Delta M_K$ from on other hand by $2\sigma$ above data hinting NP required M_K$. Simultaneously most...

We study Yukawa Renormalization Group (RG) running effects in the context of Standard Model Effective Theory (SMEFT).The being flavour dependent leads to RG-induced off-diagonal entries, so that initially diagonal matrices at high scale have be rediagonalized electroweak (EW) scale. Performing such rotations can lead violating operators which differ from ones obtained through SMEFT RG evolution. show, these a large impact on low-energy phenomenology. In order demonstrate this effect, we...

A bstract In particle physics, the modern view is to categorize things in terms of effective field theories (EFTs). Above weak scale, we have SMEFT, formed when heavy new physics (NP) integrated out, and for which Standard Model (SM) leading part. Below M W , LEFT (low-energy EFT), SM particles ( ± Z 0 H t ) are also out. order determine how low-energy measurements depend on underlying NP, it necessary compute matching conditions operators SMEFT operators. These been worked out all up...

We explore the detection possibility of light pseudoscalar Higgs boson in next-to-minimal supersymmetric standard model (NMSSM) at LHC with center mass energy, $\sqrt{S}=13\text{ }\text{ }\mathrm{TeV}$. focus on parameter space which provides one bosons as SM-like a 125 GeV and some non-SM-like can be having suppressed couplings fermions gauge due to their singlet nature. It is observed that for certain region space, singlet-like decay diphoton ($\ensuremath{\gamma}\ensuremath{\gamma}$)...

The tension among measurements of Vus from different channels, the so-called Cabibbo Angle Anomaly, can be interpreted as a signal lepton flavor universality (LFU) violation in W boson couplings. We investigate this issue framework effective field theory, keeping gauge structure Standard Model (SM) unchanged. introduce gauge-invariant dimension-6 operators that couple Higgs doublet to leptons, thereby giving non-universal tree-level contributions couplings electroweak bosons. Due SU(2)L...

A bstract The Standard Model Neutrino Effective Field Theory (SMNEFT) is the (SMEFT) augmented with right-handed neutrinos. Building on our previous work, arXiv:2010.12109, we calculate Yukawa coupling contributions to one-loop anomalous dimension matrix for 11 dimension-six four-fermion SMNEFT operators. We also present new 14 SMEFT operators that mix through couplings of

We study implications of the four-fermion semileptonic operators at low-energy and electroweak (EW) scale in framework Standard Model Effective Field Theory (SMEFT). show how renormalization group (RG) running effects can play an important role probing \emph{generic flavour structure} such operators. It is shown that 1-loop level, through RG running, depending upon structure, these give rise to sizable low energy precision (EWP) observables, leptonic, quark, as well $Z$ boson violating...