A5061884432- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Distributed and Parallel Computing Systems
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- RNA and protein synthesis mechanisms
- Electrostatic Discharge in Electronics
- Atomic and Subatomic Physics Research
- Integrated Circuits and Semiconductor Failure Analysis
- Radiomics and Machine Learning in Medical Imaging
- International Science and Diplomacy
- Genetic factors in colorectal cancer
- Geophysics and Gravity Measurements
- Scientific Computing and Data Management
- Geophysical and Geoelectrical Methods
- Medical Imaging Techniques and Applications
- Stochastic processes and financial applications
- Reservoir Engineering and Simulation Methods
- Particle accelerators and beam dynamics
University of Manchester
2021-2024
European Organization for Nuclear Research
2018-2021
National Institute for Subatomic Physics
2017-2018
Council of Science Editors
2018
UCLouvain
2014-2016
Cavendish Hospital
2011-2013
University of Cambridge
2013
The discovery of the Higgs boson in 2012, by ATLAS and CMS experiments, was a success achieved with only percent entire dataset foreseen for LHC. It opened landscape possibilities study properties, Electroweak Symmetry breaking Standard Model general, as well new avenues probing physics beyond Model. Six years after discovery, conspicuously larger collected during LHC Run 2 at 13 TeV centre-of-mass energy, theory experimental particle communities have started meticulous exploration potential...
We present predictions for the SM-Higgs-pair production channels of relevance at LHC: gluon–gluon fusion, VBF, and top-pair, W, Z single-top associated production. All these results are NLO accuracy in QCD, matched to parton showers by means [email protected] method; hence, they fully differential. With exception fusion process, which a special treatment is needed order improve upon infinite-top-mass limit, our obtained automatic way within publicly available framework. show that all...
A bstract We provide a comprehensive global analysis of Run II top measurements at the LHC in terms dimension-6 operators. distinctive feature sector as compared to Higgs-electroweak is large number four-quark discuss detail how they can be tested and quadratic lead stable limit on each individual Wilson coefficient. Predictions for all observables are computed NLO QCD. Our SF itter framework features detailed error treatment, including correlations between uncertainties.
A bstract We present a global interpretation of Higgs, diboson, and top quark production decay measurements from the LHC in framework Standard Model Effective Field Theory (SMEFT) at dimension six. constrain simultaneously 36 independent directions its parameter space, compare outcome analysis with that individual two-parameter fits. Our results are obtained by means state-of-the-art theoretical calculations for SM EFT cross-sections, account both linear quadratic corrections 1 / Λ 2...
The successful operation of the Large Hadron Collider (LHC) and excellent performance ATLAS, CMS, LHCb ALICE detectors in Run-1 Run-2 with $pp$ collisions at center-of-mass energies 7, 8 13 TeV as well giant leap precision calculations modeling fundamental interactions hadron colliders have allowed an extraordinary breadth physics studies including measurements a variety processes. LHC results so far confirmed validity Standard Model particle up to unprecedented energy scales great sectors...
We present the automation of one-loop computations in standard-model effective field theory at dimension six. Our general implementation, dubbed SMEFT@NLO, covers all types operators: bosonic, two- and four-fermion ones. Included ultraviolet rational counterterms presently allow for fully differential predictions, possibly matched to parton shower, up level strong coupling or four-quark operator coefficients. Exact flavor symmetries are imposed among light quark generations an initial focus...
Inclusive Higgs boson production at large transverse momentum is induced by different channels. We focus on the leading through gluon fusion, and perform a consistent combination of state art calculations obtained in infinite-top-mass effective theory next-to-next-to-leading order (NNLO) full Standard Model (SM) next-to-leading (NLO). thus present approximate QCD predictions for this process NNLO, study corresponding perturbative uncertainties. This calculation then compared with those...
Top quark pair production in association with a Z-boson or photon at the LHC directly probes neutral top-quark couplings. We present predictions for these two processes Standard Model (SM) Effective Field Theory (EFT) next-to-leading order (NLO) QCD. include full set of CP-even dimension-six operators that enter interactions SM gauge bosons. For comparison, we also SMEFT top loop-induced HZ and $$ t\overline{t} ILC NLO Results total cross sections differential distributions are obtained...
We present the first combination of NLO QCD matrix elements for di-Higgs production, retaining full top quark mass dependence, with a parton shower. Results are provided within both POWHEG-BOX and MadGraph5_aMC@NLO Monte Carlo frameworks. assess in detail theoretical uncertainties provide differential results. find that, as expected, shower effects relatively large observables like transverse momentum Higgs boson pair, which sensitive to extra radiation. However, these still much smaller...
We present a novel framework for carrying out global analyses of the Standard Model Effective Field Theory (SMEFT) at dimension-six: SMEFiT. This approach is based on Monte Carlo replica method deriving faithful estimate experimental and theoretical uncertainties enables one to construct probability distribution in space SMEFT degrees freedom. As proof concept SMEFiT methodology, we first study constraints provided by top quark production measurements from LHC. Our analysis includes more...
This note proposes common standards and prescriptions for the effective-field-theory interpretation of top-quark measurements at LHC.
Dark matter (DM) simplified models are by now commonly used the ATLAS and CMS Collaborations to interpret searches for missing transverse energy (ETmiss). The coherent use of these sharpened LHC DM search program, especially in presentation its results their comparison direct-detection (DD) indirect-detection (ID) experiments. However, community has been aware limitations models, particular lack theoretical consistency some them restricted phenomenology leading relevance only a small subset...
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 We present SMEF i T3.0, an updated global SMEFT analysis of Higgs, top quark, and diboson production data from the LHC complemented by electroweak precision observables (EWPOs) LEP SLD. consider recent inclusive differential measurements Run II, alongside with a novel implementation EWPOs based on independent calculations relevant EFT contributions. estimate impact HL-LHC parameter space when added through dedicated projections extrapolating II data. quantify significant...
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 At the LHC, top quarks can be produced singly with a sizeable rate via electroweak interactions. This process probes limited set of top-quark couplings, i.e., same entering decay, yet at higher scales and different sensitivity. Requiring production Z or H boson in association single-top significantly extends sensitivity this to new physics, opening up unique possibility testing top-Higgs, top-gauge, triple gauge, gauge-Higgs interactions without being dominated by QCD We consider...
We study the production of Higgs boson pairs via gluon fusion at LHC in Two-Higgs-Doublet Model. present predictions NLO accuracy QCD, matched to parton showers through MC@NLO method. A dedicated reweighting technique is used improve calculation upon infinite top-mass limit. perform our within MadGraph5_aMC@NLO framework, along with 2HDM implementation based on NLOCT package. The inclusion corrections leads large K-factors and significantly reduced theoretical uncertainties. examine seven...
We present the results of computation next-to-leading order QCD corrections to production cross section a Higgs boson in association with top-antitop pair at LHC, including three relevant dimension-six operators ($O_{t \varphi }, O_{\varphi G}, O_{tG}$) standard model effective field theory. These also contribute bosons loop-induced processes such as inclusive Higgs, $Hj$ and $HH$ production, modify decay branching ratios for which we provide predictions. perform detailed study sections...
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 The ongoing Effective Field Theory (EFT) program at the LHC and elsewhere is motivated by streamlining connection between experimental data UV-complete scenarios of heavy new physics beyond Standard Model (BSM). This provided matching relations mapping Wilson coefficients EFT to couplings masses models. Building upon recent work on automation tree-level one-loop in SMEFT, we present a novel strategy automating constraint-setting procedure parameter space general UV-models matched...
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....
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...