A5036243546- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Quantum, superfluid, helium dynamics
- Analytical Chemistry and Sensors
- Nuclear Physics and Applications
- Black Holes and Theoretical Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Particle Detector Development and Performance
- Gaussian Processes and Bayesian Inference
- Neutrino Physics Research
- Geophysics and Gravity Measurements
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Advanced Optical Sensing Technologies
- advanced mathematical theories
- Atomic and Subatomic Physics Research
- Digital Radiography and Breast Imaging
- Dark Matter and Cosmic Phenomena
- Advanced Data Storage Technologies
- Nuclear physics research studies
Deutsches Elektronen-Synchrotron DESY
2016-2025
University of Antwerp
2019-2022
University of Oxford
2016-2019
University of the Basque Country
2019
Institute for Research in Fundamental Sciences
2010-2017
Islamic Azad University Central Tehran Branch
2016-2017
Institut de Physique
2014
Institute of Modern Physics
2014
Chinese Academy of Sciences
2014
Institute of Theoretical Physics
2014
We provide a concise overview on transverse momentum dependent (TMD) parton distribution functions, their application to topical issues in high-energy physics phenomenology, and theoretical connections with QCD resummation, evolution factorization theorems. illustrate the use of TMDs via examples multi-scale problems hadronic collisions. These include q_T spectra Higgs vector bosons for low q_T, azimuthal correlations production multiple jets associated heavy at large jet masses. discuss...
The CASCADE3 Monte Carlo event generator based on Transverse Momentum Dependent (TMD) parton densities is described. Hard processes which are generated in collinear factorization with LO multileg or NLO level generators extended by adding transverse momenta to the initial partons according TMD and applying dedicated showers hadronization. Processes off-shell kinematics within $k_t$-factorization, either internally implemented from external packages via LHE files, can be processed for...
A common library, TMDlib2, for Transverse-Momentum-Dependent distributions (TMDs) and unintegrated parton (uPDFs) is described, which allows easy access of commonly used TMDs uPDFs, providing a three-dimensional (3D) picture the partonic structure hadrons. The tool TMDplotter web-based plotting implemented in together with collinear pdfs as available LHAPDF.
Transverse momentum dependent (TMD) parton distributions obtained from the branching (PB) method are combined with next-to-leading-order (NLO) calculations of Drell-Yan (DY) production. We apply MC@NLO for hard process calculation and matching PB TMDs. compute predictions transverse momentum, rapidity, ${\ensuremath{\phi}}^{*}$ spectra Z-bosons. find that theoretical uncertainties dominated by renormalization factorization scale dependence, while impact TMD is moderate. The agree well,...
Abstract It has been observed in the literature that measurements of low-mass Drell–Yan (DY) transverse momentum spectra at low center-of-mass energies $$\sqrt{s}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math> are not well described by perturbative QCD calculations collinear factorization region where momenta comparable with DY mass. We examine this issue from standpoint Parton Branching (PB) method, combining...
Abstract The Parton Branching (PB) method describes the evolution of transverse momentum dependent (TMD) parton distributions, covering all kinematic regions from small to large momenta $$k_{\textrm{T}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>k</mml:mi> <mml:mtext>T</mml:mtext> </mml:msub> </mml:math> . -region is very sensitive both contribution intrinsic motion partons (intrinsic ) and resummation soft gluons taken into account by PB TMD equations. We...
uPDFevolv is an evolution code for TMD parton densities using the CCFM equation. A description of underlying theoretical model and technical realization given together with a detailed program description, emphasis on parameters user may want to change
Abstract The internal motion of partons inside hadrons has been studied through its impact on very low transverse momentum spectra Drell–Yan (DY) pairs created in hadron-hadron collisions. We study DY production at next-to-leading order using the Parton Branching (PB) method which describes evolution dependent parton distributions. main focus is studying intrinsic distribution (intrinsic- $$k_{\textrm{T}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub>...
Abstract Understanding the intrinsic transverse momentum (intrinsic- $$k_\textrm{T}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>k</mml:mi> <mml:mtext>T</mml:mtext> </mml:msub> </mml:math> ) of partons within colliding hadrons, typically modeled with a Gaussian distribution characterized by specific width (the intrinsic- width), has been an extremely challenging issue. This difficulty arises because event generators like Pythia 8 require that unexpectedly...
We extract polarized parton distribution functions (PPDFs), referred to as ``KTA17,'' together with the highly correlated strong coupling ${\ensuremath{\alpha}}_{s}$ from recent and up-to-date ${g}_{1}$ ${g}_{2}$ structure world data at next-to-next-to-leading order in perturbative QCD. The stability reliability of results are ensured by including nonperturbative target mass corrections well higher-twist terms which particularly important large-$x$ region low ${\mathrm{Q}}^{2}$. Their role...
The Transverse Momentum Dependent (TMD) Parton Branching (PB) method is a Monte Carlo (MC) approach to obtain QCD high energy collider predictions grounded in ideas originating from the TMD factorization. It provides an evolution equation for parton distribution functions (TMDs) and framework use those within MC generators. This work focuses on structure of PB Sudakov form factor. factor factorized perturbative non-perturbative regions by introducing intermediate separation scale motivated...
We extract parton distribution functions (PDFs) and structure from recent experimental data of polarized lepton--deeply inelastic scattering (DIS) on nucleons at next-to-leading order (NLO) quantum chromodynamics. apply the Jacobi polynomial method to Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution as this is numerically efficient. Having determined proton neutron spin structure, we extend analysis describe $^{3}\mathrm{He}$ $^{3}\mathrm{H}$ functions, well various sum rules....
The capability of the LHC to study electromagnetic dipole moments top quark is discussed. In particular, process $pp\ensuremath{\rightarrow}p\ensuremath{\gamma}\ensuremath{\gamma}p\ensuremath{\rightarrow}pt\overline{t}p$, which supposed be tagged by forward/backward detectors at experiments, used explore electric and magnetic moments. We perform analytical calculations then a numerical analysis on sensitivity total cross section pair production in $\ensuremath{\gamma}\ensuremath{\gamma}$...
Abstract The azimuthal correlation, $$\Delta \phi _{12}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Δ</mml:mi> <mml:msub> <mml:mi>ϕ</mml:mi> <mml:mn>12</mml:mn> </mml:msub> </mml:mrow> </mml:math> , of high transverse momentum jets in pp collisions at $$\sqrt{s}=13$$ <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> TeV is studied by applying PB-TMD distributions to NLO calculations via MCatNLO together with the parton...
Abstract Azimuthal correlations in $$\mathrm {Z} +$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Z</mml:mi> <mml:mo>+</mml:mo> </mml:mrow> </mml:math> jet production at large transverse momenta are computed by matching Parton-Branching (PB) TMD parton distributions and showers with NLO calculations via MCatNLO. The predictions compared those for dijet the same kinematic range. azimuthal $$\Delta \phi $$ <mml:mi>Δ</mml:mi> <mml:mi>ϕ</mml:mi> between Z boson...
The internal motion of partons inside hadrons has been studied through its impact on very low transverse momentum spectra Drell-Yan (DY) pairs created in hadron-hadron collisions. We study DY production at next-to-leading order using the Parton Branching (PB) method which describes evolution dependent parton distributions. main focus is studying intrinsic distribution (intrinsic-$k_T$) as a function center-of-mass energy $\sqrt s$. While collinear shower Monte Carlo event generators require...
We determine polarized parton distribution functions (PPDFs) and structure from recent experimental data of deep inelastic scattering (DIS) on nucleons at next-to-next-to-leading order (NNLO) approximation in perturbative quantum chromodynamics (pQCD). The nucleon are computed using the Jacobi polynomial approach while target mass corrections (TMCs) included our fitting procedure. Having extracted spin functions, we extend study to describe $^{3}\mathrm{He}$ $^{3}\mathrm{H}$ as well Bjorken...
We present the first determination of transverse momentum dependent (TMD) photon densities with Parton Branching method. The distribution is generated perturbatively without intrinsic component. input parameters for quarks and gluons are determined from fits to precision measurements deep inelastic scattering cross sections at HERA. TMD used predict mass spectra very high lepton pairs both Drell-Yan production Photon-Initiated processes LHC.
The HZγ coupling, which is highly sensitive to the new physics beyond standard model, studied through process pp→pγp→pHX at LHC. To this purpose, an effective Lagrangian, in a model independent approach, with dimension six operators considered paper. New interaction terms regarding include Higgs boson anomalous vertices both CP-even and CP-odd structures. A detailed numerical analysis performed scrutinize accurate constraints on couplings discuss how far corresponding bounds can be improved....
Abstract Neutral current Drell–Yan (DY) lepton-pair production is considered to study Z -boson quark couplings. Using the open-source fit platform , we investigate impact of high-statistics measurements neutral DY (NCDY) forward–backward asymmetry $$A_{\textrm{FB}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>A</mml:mi> <mml:mtext>FB</mml:mtext> </mml:msub> </mml:math> near weak boson mass scale in present and forthcoming stages Large Hadron Collider (LHC)....
Abstract The Parton Branching method offers a Monte Carlo solution to the DGLAP evolution equations by incorporating Sudakov form factors. In this approach, factor can be divided into perturbative and non-perturbative components, with part being analytically calculable under specific conditions. We first examine forward demonstrate that including soft gluons (through factor) is essential for proper cancellation of divergent terms in parton density evolution. This component also important...
We perform a next-to-leading-order QCD analysis to world data on polarized structure functions ${g}_{1}$ and ${g}_{2}$ in fixed-flavor number scheme. include target mass corrections higher twist effects our fitting procedure study their non-negligible physically interesting quantities. Twist-3 contributions both are determined, the accuracy of extracted parton distribution is improved. $^{3}\mathrm{He}$ $^{3}\mathrm{H}$ described based fit result. Moreover, sum rules derived compared with...
The parton branching method is crucial for Monte Carlo generators, which are essential high-energy physics predictions. We examine the impact of soft gluons on inclusive collinear and Transverse Momentum Dependent (TMD) densities. By applying Parton-Branching (PB) method, we identify non-perturbative Sudakov form factor with integration range $z \to 1$, often neglected in shower approaches. significance demonstrated through transverse momentum spectrum Drell-Yan lepton pairs, resulting an...
It has been observed in the literature that measurements of low-mass Drell-Yan (DY) transverse momentum spectra at low center-of-mass energies $\sqrt{s}$ are not well described by perturbative QCD calculations collinear factorization region where momenta comparable with DY mass. We examine this issue from standpoint Parton Branching (PB) method, combining next-to-leading-order (NLO) hard process evolution dependent (TMD) parton distributions. compare our predictions experimental mass, and...
Azimuthal correlations in Z+jet production at large transverse momenta are computed by matching Parton - Branching (PB) TMD parton distributions and showers with NLO calculations via MCatNLO. The predictions compared those for dijet the same kinematic range. azimuthal $Δϕ$ between Z boson leading jet steeper to ${\cal O}(100)$ GeV, while they become similar very high O}(1000)$ GeV. different patterns of can be used search potential {\it factorization breaking} effects back-to-back region,...