We present the prospects of detecting quantum entanglement and violation Bell inequalities in $t\bar{t}$ events at LHC. introduce a unique set observables suitable for both measurements, then perform corresponding analyses using simulated dilepton final state, reconstructing up to unfolded level. find that can be established better than 5$\sigma$ threshold as well high $p_T$ already LHC Run 2 dataset. On other hand, only very high-$p_T$ are sensitive inequalities, making it significantly...

We present the first analysis of top spin polarizations, $t \bar t$ correlations, and entanglement at LHC in context Standard Model Effective Field Theory, that goes beyond Leading Order QCD accuracy. The complete set independent dimension-6 operators entering production is identified, their effects on all observables are extracted linear quadratic order $c/\Lambda^2$. By comparing results LO NLO, we note inclusion higher orders, while not dramatically changing picture, often amounts to...

A bstract The recent observation of entanglement between top and anti-top quarks at the LHC opens way to interpreting collider data with quantum information tools. In this work we investigate relevance observables in searches new physics. To aim, study spin correlations $$t\overline{t }$$ pairs originating from various intermediate resonances, compare discovery reach compared classical ones. We find that they provide complementary and, several notable cases, also additional leverage...

A bstract We explore the impact of Renormalisation Group (RG) effects in Standard Model Effective Field Theory (SMEFT) interpretations LHC measurements. implement RG running and mixing for Wilson coefficients as obtained from one-loop anomalous dimension matrix SMEFT into a Monte Carlo generator. This allows to consistently predict combine global fits collider observables characterised by different scales. As showcase, we examine strong coupling on predictions $$ t\overline{t} <mml:math...

A bstract We study the quantum properties of top quark pairs in lepton colliders with unpolarised beams, including spin correlations, entanglement, and violation Bell inequalities. present analytical results SM SMEFT discuss several practical aspects, like choice quantisation axes $$ t\overline{t} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> threshold effects. also note a correspondence between parity...

In the Standard Model (SM), electroweak (EW) corrections become significant at high energies, particularly tera-electronvolt scale and beyond, due to presence of Sudakov logarithms. At these energy scales, Effective Field Theory (SMEFT) framework provides an enhanced sensitivity potential new physics effects. This motivates inclusion EW not only for SM predictions but also analyses within SMEFT. this work, we compute in high-energy limit a selected set dimension-six operators, specifically...

The recent observation of entanglement between top and anti-top quarks at the LHC opens way to interpreting collider data with quantum information tools. In this work we investigate relevance observables in searches new physics. To aim, study spin correlations top/anti-top pairs originating from various intermediate resonances, compare discovery reach compared classical ones. We find that they provide complementary and, several notable cases, also additional leverage necessary detect effects.

We study the quantum properties of top quark pairs in lepton colliders with unpolarised beams, including spin correlations, entanglement, and violation Bell inequalities. present analytical results SM SMEFT discuss several practical aspects, like choice quantization axes $t \bar t$ threshold effects. also note a correspondence between parity symmetry entanglement. find that observables exhibit rich phenomenology SM, can provide additional leverage detecting new physics residing at higher scales.

We present the first analysis of top spin polarizations, $t \bar t$ correlations, and entanglement at LHC in context Standard Model Effective Field Theory, that goes beyond Leading Order QCD accuracy. The complete set independent dimension-6 operators entering production is identified, their effects on all observables are extracted linear quadratic order $c/Λ^2$. By comparing results LO NLO, we note inclusion higher orders, while not dramatically changing picture, often amounts to notable...

We explore the impact of Renormalisation Group (RG) effects in Standard Model Effective Field Theory (SMEFT) interpretations LHC measurements. implement RG running and mixing for Wilson coefficients as obtained from one-loop anomalous dimension matrix SMEFT into a Monte Carlo generator. This allows to consistently predict combine global fits collider observables characterised by different scales. As showcase, we examine strong coupling on predictions $t \bar t$ production cross sections...