C. Gwenlan
A5100728905- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Advanced Data Storage Technologies
- advanced mathematical theories
- Scientific Computing and Data Management
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- International Science and Diplomacy
- Big Data Technologies and Applications
- Nuclear physics research studies
- Noncommutative and Quantum Gravity Theories
- Advanced X-ray and CT Imaging
University of Oxford
2016-2025
AGH University of Krakow
2013-2024
Jagiellonian University
2017-2024
A. Alikhanyan National Laboratory
2024
SR Research (Canada)
2024
Federación Española de Enfermedades Raras
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2014-2023
University College London
2002-2023
European Organization for Nuclear Research
2010-2023
The physics programme and the design are described of a new collider for particle nuclear physics, Large Hadron Electron Collider (LHeC), in which newly built electron beam 60 GeV, up to possibly 140 energy collides with intense hadron beams LHC. Compared HERA, kinematic range covered is extended by factor twenty negative four-momentum squared, $Q^2$, inverse Bjorken $x$, while luminosity $10^{33}$ cm$^{-2}$s$^{-1}$ LHeC projected exceed integrated HERA two orders magnitude. devoted an...
A combination is presented of all inclusive deep inelastic cross sections previously published by the H1 and ZEUS collaborations at HERA for neutral charged current $$e^{\pm }p$$ scattering zero beam polarisation. The data were taken proton energies 920, 820, 575 460 GeV an electron energy 27.5 GeV. correspond to integrated luminosity about 1 fb $$^{-1}$$ span six orders magnitude in negative four-momentum-transfer squared, $$Q^2$$ , Bjorken x. correlations systematic uncertainties evaluated...
This document is intended as a study of benchmark cross sections at the LHC (at 7 TeV) NLO using modern parton distribution functions currently available from 6 PDF fitting groups that have participated in this exercise. It also contains succinct user guide to computation PDFs, uncertainties and correlations sets. A companion note, submitted archive, provides an interim summary current recommendations PDF4LHC working group for use LHC, section uncertainty calculations.
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...
Abstract A precise knowledge of the quark and gluon structure proton, encoded by parton distribution functions (PDFs), is paramount importance for interpretation high-energy processes at present future lepton–hadron hadron–hadron colliders. Motivated recent progress in PDF determinations carried out CT, MSHT, NNPDF groups, we an updated combination global fits: PDF4LHC21. It based on Monte Carlo CT18, MSHT20, NNPDF3.1 sets followed either its Hessian reduction or replica compression....
A method to facilitate the consistent inclusion of cross-section measurements based on complex final-states from HERA, TEVATRON and LHC in proton parton density function (PDF) fits has been developed. This can be used increase sensitivity data deviations Standard Model predictions. The stores perturbative coefficients NLO QCD calculations final-state observables measured hadron colliders look-up tables. allows posteriori functions (PDFs), strong coupling, as well a variation renormalisation...
The accurate determination of the parton distribution functions (PDFs) proton is an essential ingredient Large Hadron Collider (LHC) program. PDF uncertainties impact a wide range processes, from Higgs boson characterization and precision Standard Model measurements to new physics searches. A major recent development in modern analyses has been exploit wealth information contained LHC Run I, as well progress tools methods include these data fits. In this report we summarize that...
An overwhelming number of theoretical predictions for hadron colliders require parton distribution functions (PDFs), which are an important ingredient theory infrastructure the next generation high-energy experiments.This whitepaper summarizes status and future prospects determination high-precision PDFs applicable in a wide range energies experiments, particular precision tests Standard Model new physics searches at high-luminosity Large Hadron Collider Electron-Ion Collider.We discuss...
Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 ZEUS Collaborations are combined. Reduced obtained kinematic range negative four-momentum transfer squared photon $$2.5~\hbox {GeV}^2\le Q^2 \le 2000\, \hbox {GeV}^2$$ Bjorken scaling variable $$3 \cdot 10^{-5} x_\mathrm{Bj} 5 10^{-2}$$ . The combination method accounts for correlations statistical systematic uncertainties among different datasets. Perturbative QCD calculations...
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...
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment more than 500 pb$^{-1}$. been machine excellence for study QCD structure proton. Large Hadron Collider (LHC), which will collide protons centre-of-mass energy 14 TeV, be completed at CERN 2007. main mission LHC is discover mechanisms electroweak...
The strong coupling constant αs is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. dependence of NNLO predictions resulting value αs(mZ) Z-boson mass mZ are studied as a function choice renormalisation factorisation scales. Using data together, to be αs(mZ)=0.1157(20)exp(29)th . Complementary, together with parton distribution...
We describe how one may employ a very simple event selection, using only the kinematic variable ${m}_{T2}$, to search for new particles at LHC. The method is useful when searching evidence of models (such as $R$-parity conserving supersymmetry), which have ${Z}_{2}$ parity and weakly interacting lightest parity-odd particle. discuss properties make this an excellent discriminant against great majority standard model backgrounds. Monte Carlo simulations suggest that approach could be used...
This Report summarizes the proceedings of 2017 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) theoretical uncertainties and dataset dependence parton distribution functions, (III) in jet substructure techniques, (IV) issues description production Higgs bosons how to relate experimental measurements, (V) phenomenological studies essential comparing LHC data from Run II predictions...
Two-particle azimuthal correlations have been measured in neutral current deep inelastic ep scattering with virtuality Q2> 5 GeV2 at a centre-of-mass energy $$ \sqrt{s} = 318 GeV recorded the ZEUS detector HERA. The of charged particles range laboratory pseudorapidity −1.5 < η 2.0 and transverse momentum 0.1 pT< 5.0 event multiplicities Nch up to six times larger than average 〈Nch〉 ≈ 5. two-particle terms angular observables cn{2} 〈〈cosnΔφ〉〉, where n is between 1 4 ∆φ relative angle two...
Abstract The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. final stage is presented, a next-to-next-to-leading-order (NNLO) analysis the HERA data on inclusive deep inelastic ep scattering together with jet as published by H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously $$\alpha _s(M_Z^2)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>α</mml:mi> <mml:mi>s</mml:mi> </mml:msub>...
2nd workshop on the implications of HERA for LHC physics. Working groups: Parton Density Functions Multi-jet final states and energy flows Heavy quarks (charm beauty) Diffraction Cosmic Rays Monte Carlos Tools
The high-precision HERA data allows searches up to TeV scales for beyond the Standard Model contributions electron–quark scattering. Combined measurements of inclusive deep inelastic cross sections in neutral and charged current ep scattering corresponding a luminosity around 1 fb−1 have been used this analysis. A new approach analysis is presented; simultaneous fits parton distribution functions together with "new physics" processes were performed. Results are presented considering finite...
The extension of interpolation-grid frameworks for perturbative QCD calculations at next-to-next-to-leading order (NNLO) is presented deep inelastic scattering (DIS) processes. A fast and flexible evaluation higher-order predictions any a posteriori choice parton distribution functions (PDFs) or value the strong coupling constant essential in iterative fitting procedures to extract PDFs Standard Model parameters as well detailed study scale dependence. APPLfast project, described here,...
The azimuthal correlation angle, $\Delta\phi$, between the scattered lepton and leading jet in deep inelastic $e^{\pm}p$ scattering at HERA has been studied using data collected with ZEUS detector a centre-of-mass energy of $\sqrt{s} = 318 \;\mathrm{GeV}$, corresponding to an integrated luminosity $326 \;\mathrm{pb}^{-1}$. A measurement cross sections laboratory frame was made fiducial region photon virtuality $10 \;\mathrm{GeV}^2 < Q^2 350 \;\mathrm{GeV}^2$, inelasticity $0.04 y 0.7$,...
We provide an assessment of the impact parton distributions on determination LHC processes, and accuracy with which (PDFs) can be extracted from data, in particular current forthcoming HERA experiments. give overview reference processes their associated PDF uncertainties, study detail W Z production at LHC. discuss precision may obtained analysis existing tests consistency data different experiments, combination these data. determine further improvements PDFs future (including measurements...