Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 31 for “"Parton distribution functions"”.
-
Measurement of the Drell--Yan differential cross section with the CMS detector at the LHC
… depends on empirical quantities known as parton distribution functions (PDFs) which parameterize the structure of the proton. In addition to the differential cross sections, the measurements of ratios of the normalized differential cross sections (double ratios) at √<em>s</em> = 7 and …
-
Transverse momentum dependent nucleon structure from pions impinged on a transversely polarized proton target
… of the nucleon generalizes the 1-dimensional parton distribution functions (PDFs) to a 3-dimensional description. The extended distributions are called transverse momentum dependent (TMD) parton distribution functions. TMD functions include transverse quark and gluon momentum to parameterize …
-
Measurement of the Top Quark-Antitop Quark Differential Cross Section, dsigma/dM(tt), in Proton-Antiproton Collisions at Center of Mass Energy = 1.96 TEV
… expectation, as modeled by PYTHIA with CTEQ5L parton distribution functions. I set limits on the ratio kappa/M Pl in the Randall-Sundrum model by looking for Kaluza Klein gravitons which decay to top quarks. I find kappa/MPl > 0.16 at the 95% confidence level.
-
W cross section measurement in the electron channel in pp collisions at [the square root of sigma]= 7 TeV
… NNLO QCD calculations with the latest parton distribution functions.
-
Beam spin asymmetry measurements in deeply virtual Compton scattering
… amplitude, which relates it to the Generalized Parton distribution functions. Reaction ep → epX is studied. A fit to the line shape of the missing mass squared distribution of (ep) is used to extract the number of single photon final states in each kinematical bin for both helicities of the …
-
Testing Lepton Nonuniversality In Tau Neutrino Scattering
… in order to cancel out the uncertainty of the parton distribution functions, we consider the ratio of total and dierential cross sections of tau-neutrino to muon-neutrino scattering. We find new physics effects that can be possibly be observed at the proposed Search for Hidden Particles (SHiP) …
-
Deep inelastic scattering at high energies
… describe the definitions and properties of the parton distribution functions and the hard scattering co-efficients used in factorization theorems. In the final chapter we study the cusp anomalous dimension which governs the large Bjorken-x behavior of parton distribution functions. We first …
-
STATISTICAL LEARNING FOR STANDARD MODEL PHENOMENOLOGY
… of this thesis is the accurate determination of parton distribution functions (PDFs), with a particular emphasis on modern machine learning tools used within the NNPDF approach. We first present NNPDF4.0, currently the most recent and most precise set of PDFs based on a global dataset. We then …
-
Collinear singularities and the factorization scale in perturbative QCD
… we argue in favor of the use of a bottom-quark distribution function, which sums collinear logarithms, in the calculation of the cross section for Higgs-boson production in association with bottom quarks. As a testing ground for Higgs searches, we propose a measurement of Z-boson production in …
-
Single muon production as a function of charged-particle multiplicity in proton-proton collisions at 8 TeV with ALICE at the LHC
… be sensitive to small gluon Bjorken-x values, in parton distribution functions (PDF). In addition, the investigation of heavy flavour production in proton-proton collisions, also constitutes an essential baseline for the corresponding measurements in heavy ion collisions. In this study, the …
-
Precision measurement of and search for dark matter in the transverse momentum spectra of Z bosons
… test of the Standard Model, and constrains the parton distribution functions of the proton. Moreover, it is a building block for future measurements of the mass of the W± boson. A study of the efficiency of lepton identification algorithms is performed which drives the precision of the …
-
Moments of parton distribution amplitudes and structure functions for the light mesons from lattice QCD
… two hadronic structure quantities. These are the parton distribution amplitudes (PDAs) which enter in the form-factor for exclusive scattering processes and the parton distribution functions (pdfs) that appear in inclusive processes. The PDA’s provide process independent partonic information about …
-
ADVANCEMENTS IN PDFS DETERMINATION: INCORPORATION OF QED EFFECTS AND NEW THEORETICAL IMPROVEMENTS IN A MODERN DEEP LEARNING FRAMEWORK
… is the improvement in the determination of parton distribution functions (PDFs) through the inclusion of new theoretical effects in the theoretical predictions that are compared to experimental data. Such effects are the inclusion of Quantum Electrodynamics (QED) corrections, the inclusion …
-
Longitudinal double spin asymmetry for inclusive jet production in polarized proton-proton collisions at [square root of] s = 200 GeV
… predictions based on NLO pQCD using the CTEQ6M parton distribution functions. The cross-section agrees with theoretical predictions when the uncertainty in jet momentum is taken into account. The cross-section is within the systematic uncertainties of previous measurements. The largest …
-
Precision Frontiers in Proton Structure and their Interplay with the Search for New Physics
… as possible, through precise knowledge of partonic scattering amplitudes, proton structure and SM parameters. Alongside this, the frameworks that are available for characterising deviations, such as the SM Effective Field Theory (SMEFT), must be utilised effectively such that in the future …
-
DEEP LEARNING APPLICATIONS TO PARTICLE PHYSICS: FROM MONTE CARLO SIMULATION ACCELERATION TO PROTODUNE RECONSTRUCTION
… accelerators. The former product, PDFFlow, is a Parton Distribution Functions interpolator, the latter, MadFlow, aims at building a complete tool suite to accelerate the whole event generation framework. The reconstruction pipeline at neutrino detectors is comprised of many different algorithms …
-
Measurements of Compton Scattering on the Proton at 2--6 GeV
… 2.3-5.7 GeV electron beam energies and a wide distribution of large scattering angles. The 25 kinematic settings sampled a domain of s = 5-11(GeV/c)2, -t = 2-7(GeV/c)2 and -u = 0.5-6.5( GeV/c)2. In addition, a measurement of longitudinal and transverse polarization transfer asymmetries was made …
-
Measurements of Compton scattering on the proton at 2-6 GeV
… 2.3-5.7 GeV electron beam energies and a wide distribution of large scattering angles. The 25 kinematic settings sampled a domain of s = 5−11(GeV/c)2, −t = 2−7(GeV/c)2 and −u = 0.5−6.5(GeV/c)2. In addition, a measurement of longitudinal and transverse polarization transfer asymmetries was made …
-
Jet physics at ATLAS
… of jet cross-sections, independent of parton distribution functions, was investigated. Such methods were found to provide an accurate approximation to a standard Monte-Carlo simulation (within 1%) and enable collider data to be readily included in global PDF fitting procedures. However, …
-
Vector boson production with the ALICE detector
… can be used to obtain information on quark parton distribution functions (PDF). The data used in the analysis was collected by A Large Ion Collider Experiment (ALICE) at the Large Hadron Collider (LHC). The ALICE detector is designed to study ultrarelativistic heavy-ion collisions, in which …
Page 1 of 2