A5078687173- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Quantum Mechanics and Applications
- Distributed and Parallel Computing Systems
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Radiomics and Machine Learning in Medical Imaging
- Advanced Data Storage Technologies
- Quantum, superfluid, helium dynamics
- Magnetic confinement fusion research
- Advanced Chemical Physics Studies
- Quantum Mechanics and Non-Hermitian Physics
- Noncommutative and Quantum Gravity Theories
- Electromagnetic Simulation and Numerical Methods
- Atomic and Subatomic Physics Research
University of Würzburg
2020-2024
Max Planck Institute for Physics
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2018-2019
University of Turin
2018
A bstract We present a new method for the local subtraction of infrared divergences at next-to-next-to-leading order (NNLO) in QCD, generic infrared-safe observables. Our attempts to conjugate minimal counterterm structure arising from sector partition radiation phase space with simplifications following analytic integration counterterms. In this first implementation, applies final-state massless particles. show how our compactly organises NLO, we deduce detail general terms NNLO, and...
Abstract In this manuscript, we report the outcome of topical workshop: paving way to alternative NNLO strategies ( https://indico.ific.uv.es/e/WorkStop-ThinkStart_3.0 ), by presenting a discussion about different frameworks perform precise higher-order computations for high-energy physics. These approaches implement novel deal with infrared and ultraviolet singularities in quantum field theories. A special emphasis is devoted local cancellation these singularities, which can enhance...
Abstract We present a calculation of inclusive diboson ( $${\textrm{WZ, ZZ, WW}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>WZ, WW</mml:mtext> </mml:mrow> </mml:math> ) processes at the LHC in presence intermediate polarised weak bosons decaying leptonically, matching next-to-leading-order accuracy QCD with parton-shower effects. Starting from recent developments polarised-boson simulation based on helicity selection amplitude level, we have carried out...
Measuring the scattering of longitudinally-polarized vector bosons represents a fundamental test ElectroWeak Symmetry Breaking. In addition to challenges provided by low rates and large backgrounds, there are conceptual issues which need be clarified for definition suitable signal. Since unstable can only observed through their decay products, polarization states interfere among themselves. Moreover, already at tree level, diagrams cannot interpreted as production times EW but necessary...
Insight into the electroweak (EW) and Higgs sectors can be achieved through measurements of vector boson scattering (VBS) processes. The EW bosons are rare processes that precisely predicted in Standard Model (SM) closely related to mechanism. Modifications VBS also models physics beyond SM (BSM), for example changes couplings gauge resonant production new particles. In this review, experimental results theoretical developments at Large Hadron Collider, its high luminosity upgrade, future...
In this letter we present results for next-to-leading-order electroweak corrections to doubly polarised W+W− production at the LHC in fully leptonic decay channel. We model and of two W bosons double-pole approximation, including factorisable real virtual corrections, separating polarisation states amplitude level. obtain integrated differential predictions signals a realistic fiducial setup.
A bstract This study explores fully leptonic WZ and WW production at the LHC within SMEFT framework NLO in QCD, focusing on both CP-even CP-odd triple-gauge-coupling dimension-six operators. We investigate off-shell processes, contrasting our findings inclusive setups with those presence of realistic fiducial selections. Alongside conventional kinematic observables, we examine polarisation-sensitive observables angular coefficients. Moreover, assess potential effects asymmetry observables....
The measurement of polarization fractions massive gauge bosons at the LHC provides an important check Standard Model and in particular Electroweak Symmetry Breaking mechanism. Owing to unstable character $\text{W}$ $\text{Z}$ bosons, devising a theoretical definition for polarized signals is not straightforward always subject some ambiguity. Focusing on $\text{W}$-boson pair production fully leptonic channel, we propose compute cross-sections distributions based gauge-invariant...
Accessing the polarization of weak bosons provides an important probe for mechanism electroweak symmetry breaking. Relying on double-pole approximation and separation polarizations at amplitude level, we study WZ production LHC, with both in a definite mode, including NLO QCD effects. We compare results obtained defining vectors two different frames. Integrated differential cross-sections realistic fiducial region are presented.
We use the Local Analytic Sector Subtraction scheme to construct a completely analytic set of expressions implementing fully local infrared subtraction at NNLO for generic coloured massless final states. The cancellation all explicit poles appearing in double-virtual contribution, real-virtual correction and integrated counterterms is explicitly verified, finite contributions arising from are analytically evaluated terms ordinary polylogarithms up weight three. resulting formula can readily...
A bstract We provide a general method to construct local infrared subtraction counterterms for unresolved radiative contributions differential cross sections, any order in perturbation theory. start from the factorised structure of virtual corrections scattering amplitudes, where soft and collinear divergences are organised gauge-invariant matrix elements fields Wilson lines, we define eikonal form factors jet functions which fully radiation phase space, can be shown cancel poles upon...
Vector-boson scattering processes are of great importance for the current run-II and future runs Large Hadron Collider. The presence triple quartic gauge couplings in process gives access to sector Standard Model (SM) possible new-physics contributions there. To test any hypothesis, sound knowledge SM is necessary, with a precision which at least matches experimental uncertainties existing forthcoming measurements. In this article we present detailed study vector-boson two positively-charged...
The high luminosity that will be accumulated at the LHC enable precise differential measurements of hadronic production a top--antitop-quark pair in association with $\text{W}$ boson. Therefore, an accurate description this process is needed for realistic final states. In work we combine first time NLO QCD and electroweak corrections to full off-shell $\text{t}\overline{\text{t}}{\text{W}}^+$ three-charged-lepton channel, including all spin correlations, non-resonant effects, interferences....
Understanding the polarization structure and providing precise predictions for multiboson processes at LHC is becoming urgent in light of upcoming run-3 high-luminosity data. The CMS ATLAS collaborations have already started using polarized to perform template fits data, getting access W Z bosons. So far, only fully leptonic decay channels been considered this perspective. natural step forward investigation hadronic decays electroweak In work, we compute NLO QCD corrections production WZ...
We study the polarization of positively charged $W$'s in scattering massive electroweak bosons at hadron colliders. rely on separation weak boson polarizations gauge-invariant, doubly-resonant part amplitude Monte Carlo simulations. Polarizations depend reference frame which they are defined. discuss change fractions and kinematic distributions arising from defining vectors two different frames have been employed recent experimental analyses.
Measuring the polarization of electroweak bosons at LHC allows for important tests electroweak-symmetry-breaking mechanism that is realized in nature. Therefore, precise Standard Model predictions are needed production polarized presence realistic kinematic selections. We formulate a method calculation cross-sections NLO relies on pole approximation and separation matrix elements amplitude level. In this framework, we compute NLO-accurate two Z LHC, including first time EW corrections...
A bstract We present results of a computation NLO QCD corrections to the production an off-shell top-antitop pair in association with W + boson proton-proton collisions. As calculation is based on full matrix elements for process $$ \mathrm{pp}\to {\mathrm{e}}^{+}{v}_{\mathrm{e}}{\mu}^{-}{\overline{v}}_{\mu }{\tau}^{+}{v}_{\tau}\mathrm{b}\overline{\mathrm{b}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>pp</mml:mi> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>e</mml:mi>...
A bstract Measuring precisely top-pair-associated processes at hadron colliders will become possible with the upcoming LHC running stages. The increased data statistics especially enable differential measurements leading to an improved characterisation of such processes. Aiming a consistent data-theory comparison, precise Standard-Model predictions are needed, including higher-order corrections and full off-shell effects. In this work we present NLO-accurate for production decay top-antitop...
A bstract We present the first calculation of same-sign WW scattering at LHC in fully leptonic decay channel including modelling polarisation for intermediate electroweak bosons and radiative corrections up to NLO EW+QCD accuracy. The predictions rely on a pole expansion split states matrix-element level. Doubly-polarised unpolarised signals are investigated together with full off-shell results. detailed phenomenlogical analysis is carried out focusing differential observables that...
Isolating the scattering of longitudinal weak bosons at LHC is an important tool to probe ElectroWeak Symmetry Breaking mechanism. Separating polarizations $W$ and $Z$ complicated, because non resonant contributions interference effects. Additional care necessary when considering bosons, due $\gamma/Z$ mixing in coupling charged leptons. We propose a method define polarized signals $Z\!Z$ $W^+\!Z$ LHC, which relies on separation boson amplitude level Monte Carlo simulations. After validation...
Abstract Investigating the polarization of weak bosons provides an important probe scalar and gauge sector Standard Model. This can be done in Higgs decay to four leptons, whose Standard-Model leading-order amplitude enables generate polarized observables from unpolarized ones via a fully-differential reweighting method. We study $$\text {Z} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mtext>Z</mml:mtext> </mml:math> -boson boson produced association with two jets, both...
Abstract Extracting longitudinal modes of weak bosons in LHC processes is essential to understand the electroweak-symmetry-breaking mechanism. To that end, we propose a general method, based on wide neural networks, properly model longitudinal-boson signals and hence enable event-by-event tagging bosons. It combines experimentally accessible kinematic information genuine theoretical inputs provided by amplitudes perturbation theory. As an application consider production Z boson association...
Within the framework of local analytic sector subtraction, we present full integration double-real and real-virtual infrared counterterms that enter NNLO QCD computations with any number massless final-state partons. We show a careful choice phase-space mappings leads to simple results, including non-singular terms, can be obtained conventional techniques.
Abstract The study of top-quark properties will be a central aspect the physics programme any future lepton collider. In this article, we investigate production pairs in semi-leptonic decay channel $${\textrm{e}}^{+}\textrm{e}^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mtext>e</mml:mtext> </mml:mrow> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>-</mml:mo> </mml:math> collisions, whose experimental signature is one charged lepton, jets, and missing...
A bstract Motivated by the growing interest in accessing spin structure of multi-boson processes and measuring quantum entanglement at high energies, we study polarisation spin-correlation coefficients di-boson systems. We show that higher-order corrections QCD electroweak type, off-shell modeling, realistic effects such as fiducial selections neutrino reconstruction are unavoidable to properly determine coefficients, consequently provide a sound interpretation observables sensitive...