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Showing 1 to 20 of 21 for “"Proton Structure"”.
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Exploring proton structure using lattice QCD
… in lattice QCD we can explore many facets of the structure of the nucleon. In this effort, we have developed the building block method to determine all the lattice correlation functions which con- tribute to the off forward matrix elements of the twist two operators. These matrix elements …
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Precision Frontiers in Proton Structure and their Interplay with the Search for New Physics
… 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 it would be possible to …
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Measurement of the Strange Quark Contribution to Proton Structure Through Parity Violating Electron -Proton Scattering
At intermediate Q2 of about 0.23 ( GeV/c)2, a consistent value of is seen compared to previous experiments; together with a measurement that may imply a negative value of GsE . For Q2 above 0.5 (GeV/c) 2 a consistently positive value for the linear combination of the strange form factors is seen.
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Measurement of the strange quark contribution to proton structure through parity violating electron-proton scattering
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-26T21:09:27Z No. of bitstreams: 1 Nakahara_Kazutaka.pdf: 6364023 bytes, checksum: 95e2dbf91d0ddd898fcd27bbef85e892 (MD5)
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Precision QCD and effective field theories with machine learning
… functions (PDFs) which parameterize the proton structure in terms of its elementary quark and gluon constituents. These quantities are non-perturbative and obtained from data using a global QCD analysis. In tandem, Effective Field Theories (EFTs), provide a convenient framework to capture …
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A precision millimeter-wave measurement of the Rydberg frequency
… that the reduced-mass, relativistic, QED, and proton structure corrections can be computed to the desired accuracy. Recent advances in optical frequency techniques applied to transitions involving low-lying states of hydrogen have decreased the uncertainty in cR[infinity], to 7.6 x 10⁻¹². This …
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Resummation in Deep Inelastic Scattering
… is the process where an electron collides with a proton at high energies, thus serving as a probe for the internal proton structure. Precise computation of deep inelastic scattering cross sections is crucial for testing our current understanding of the Standard Model. The cross section for this …
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Disentangling the EMC effect: from free to bound nucleon structure
… on fixed targets allow for the study of the structure of nucleons. While the structure of the free proton has been well measured, the free neutron structure and the modification of nucleon structure in the nuclear environment, the EMC effect, remain open questions. Studies suggest that the …
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Resonance contribution to electromagnetic structure functions
The part of the pion and proton electromagnetic structure functions due to direct channel resonances in the virtual Compton amplitude is discussed. After a phenomenological discussion, based on the work of Bloom and Gilman, of resonance production in inelastic electroproduction, the single …
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Test of New Readout Electronics for the BONuS12 Experiment
<p>For decades, electron-proton scattering experiments have been providing a large amount of data on the proton structure function. However, because of the instability of free neutrons, fewer experiments have been able to study the neutron structure function. The BONuS collaboration at Jefferson …
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W boson cross sections and single spin asymmetries in polarized proton-proton collisions at [square root of] s =500 GeV at STAR
Understanding the structure of the proton is an ongoing effort in the particle physics community. Existing in the region of nonperturbative QCD, the various models for proton structure must be informed and constrained by experimental data. In 2009, the STAR experiment at Brookhaven National Lab …
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STUDYING THE EFFECTS OF NEW ADDITIVE MATERIALS FOR THE IMPROVEMENT OF THE CAPACITY AND CYCLE LIFE PERFORMANCE OF THE LEAD-ACID BATTERY
… Tydrolyte contains a concentrated Eigen proton structure (H9O4<sup>+</sup>) that consists of a hydronium cation (H3O<sup>+</sup>) hydrated by three water molecules.</p> <p>The positive active mass (PAM) utilization is of great importance, because it limits the theoretical capacity of the …
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Dijet azimuthal correlations and conditional yields in pp and p+Pb collisions at q SNN = 5.02 TeV with the atlas detector
Made available in DSpace on 2019-02-06T19:32:46Z (GMT). No. of bitstreams: 3 KULINICH-DISSERTATION-2018.pdf: 26745656 bytes, checksum: 7acb4d53a1b82cca55823e33dbe232e0 (MD5) LICENSE.txt: 4211 bytes, checksum: 2e3ebeee53f50b60c80be6dcd5685af1 (MD5) PROQUEST_LICENSE.txt: 4557 bytes, checksum: …
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Simulation and Development of the Radial Time Projection Chamber for the BONuS12 Experiment in CLAS12
<p>Knowledge of the structure of nucleons (i:e: protons and neutrons) is a central topic of interest to nuclear/particle physicists. Much more is known about the structure of the proton than the neutron due to the lack of high-density free neutron targets. The Barely Off-shell Nucleon Structure …
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Fragmentation and nucleon structure in semi-inclusive deep-inelastic scattering at the HERMES experiment
… significantly enhance our understanding of the proton structure, as well as the fragmentation process in deep-inelastic scattering. Furthermore, the 3D binning at an unprecedented level of precision provides a handle to help disentangle the transverse momentum structure of both. The high level …
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A measurement of the x dependent sea flavor asymmetry at Seaquest
… located at Fermilab which uses a 120 GeV proton beam on liquid hydrogen, liquid deuterium, and several solid targets. The flagship measurement of this experiment is to use the Drell-Yan process to improve the accuracy of the antiquark PDFs in the parton momentum fraction x range 0.1 to …
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The radiance of the gluon spin : constraining the proton spin structure with the direct photon double helicity asymmetry
… fundamental to the observable universe, the proton is not elementary. Rather the particle is a bound state of three valence quarks and the QCD vacuum that condenses around them, its properties an amalgamation of those underlying degrees of freedom. Naive expectations presume that …
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Transverse momentum dependent nucleon structure from pions impinged on a transversely polarized proton target
The transverse momentum structure 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 …
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Measurement of the Proton A1 and A2 Spin Asymmetries: Probing Color Forces
… of the Nucleon Experiment (SANE) measured the proton spin structure function g2 in a range of Bjorken x, 0.3 < x < 0.8, where extraction of the twist-3 matrix element dp2 (an integral of g2 weighted by x2) is most sensitive. The data was taken from Q2 equal to 2.5 GeV 2 up to 6.5 GeV2. In this …
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Transverse single-spin asymmetries in pion-induced Drell-Yan and J/Psi production at COMPASS
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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