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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 360 for “"QCD"”.
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Limits of QCD
… kinematic limits of Quantum Chromodynamics (QCD), including the soft, collinear, and Regge limits, using soft-collinear effective theory (SCET). We begin by studying transverse momentum dependent (TMD) physics in semi-inclusive deep inelastic scattering (SIDIS), which probes the small …
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Nonperturbative QCD calculations
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Thermodynamics of lattice QCD
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-06T16:59:26Z No. of bitstreams: 1 1985_matsuoka.pdf: 1424055 bytes, checksum: a5e67bf9659882f27f89c02a0b2e29b9 (MD5)
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Thermodynamics of 5-flavor QCD
… phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via established approaches, …
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UNDERLYING EVENTS AND SOFT QCD
… in various soft Quantum Chromodynamics (QCD) phenomena are discussed, focusing on the measurement of the underlying event at 2.76 and 13 TeV with the CMS Collaboration at the Large Hadron Collider (LHC). Such soft QCD phenomena are of huge phenomenological and experimental interest at the …
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Perturbative QCD in exclusive processes
… status. The sensitivity of perturbative QCD predictions for the nucleon form factors, ψ → pp̅, and 𝛾𝛾 → pp̅, to the theoretical uncertainties of the nucleon wave function and the form of the running coupling constant is investigated. A new prediction for the cross-section for 𝛾𝛾 → Δ++ …
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HIGH ENERGY RESUMMATION IN PERTURBATIVE QCD
In this work, we review the general aspects of the high energy resummation technique. Recently derived results for high energy resummation of direct photon production are matched to NLO computations, and their implications at the Tevatron and at the LHC are explored. The effects of resummation are …
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Strong coupling methods for lattice QCD
Lattice QCD at finite baryon density suffers from the numerical finite density sign problem. Strong coupling methods, expanding in the inverse gauge coupling, give rise to alternative representations of the partition function that can make the sign problem milder. This Habilitation discusses the …
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Light Hadron Properties From Lattice QCD
<p>The subject of this thesis is mainly concerned with dynamics of light quarks. The question that will be attempted to answer is, What is the quark mass dependence of low lying hadrons ? In particular, this work will focus on the quark mass dependence of mesons and baryons with the tools of …
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Understanding hadronic physics via latice QCD
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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Exploring proton structure using lattice QCD
… distributions of the nucleon using lattice QCD. The generalized parton distributions determine the angular momentum decomposition of the nucleon and the transverse distributions of partons within the nucleon. Additionally, the generalized parton distributions reduce to the elastic form …
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A Charcuterie Platter of QCD Matter
… the dynamics of Quantum Chromodynamics (QCD). In this thesis, I address a variety of questions in QCD using Effective Field Theory (EFT). The first question deals directly with the observed phenomenology of QCD: How can we use EFT to disentangle the complicated three-dimensional dynamics …
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Exploring QCD Factorization at Moderate Energy Scales
<p>Asymptotic freedom in QCD facilitates the use of partonic degrees of freedom over short distances, but physical processes are sensitive to a wide range of scales. Thus, it is necessary in QCD calculations to utilize a factorization scheme to separate a process into perturbative and …
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Monte Carlo simulations of hard QCD radiation
Monte Carlo event generators, such as Herwig++, provide a full simulation of events at collider experiments. They give a fully exclusive description of hadronic final states and are therefore crucial tools for the planning of future experiments and analysing of data from existing experiments. The …
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Electromagnetic properties of baryons from lattice QCD
… and decuplet baryons are calculated in quenched QCD on a 20 ³ x40 lattice with a lattice spacing of 0.128 fm using the fat - link irrelevant clover ( FLIC ) fermion action. FLIC fermions enable simulations to be performed efficiently at quark masses as low as 300 MeV. By combining FLIC fermions …
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Collinear divergences and factorization in perturbative QCD
… choosing a factorization scale in perturbative QCD is examined in detail. First a previously defined factorization scheme called the collinear scheme is implemented on Higgs production by bottom quark fusion, and then extended to Higgs production by gluon fusion. After this the issue of gauge …
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The ratio gA/gV in cavity QCD
BRS invariant quantum chromodynamics in a spherical cavity is developed using canonical quantization. The weak vector and axial form factors are defined, employing a classical external W- field. The Gell-Mann and Low theorem is extended to include non-diagonal matrix elements and degenerate …
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