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26/10/2025, 14:00
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Subtracted dispersion relations for Virtual Compton Scattering off the proton” Abstract: "In this work, we propose the formalism of subtracted dispersion relations for virtual Compton scattering (VCS) off a proton target as a tool for extracting generalized polarizabilities (GPs) of the proton. This approach offers advantages over the one based on unsubtracted dispersion relations used so far...
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26/10/2025, 15:36
Proton leading scalar and spin polarisabilities from proton Compton scattering data Timon Esser, Franziska Hagelstein, and Vadim Lensky We present the results of a partial wave analysis of the global real Compton scattering (RCS) database, extracting the leading scalar and spin polarisabilities of the proton. Exploring the nucleon using electromagnetic probes reveals a fine and intricate...
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27/10/2025, 12:10
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27/10/2025, 12:22
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27/10/2025, 14:00
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I will report on the Jefferson Lab (JLab) Hall C experiment E12-10-008 that finished data taking in February ‘23. Multiple cryogenic and solid targets were used to measure inclusive electron scattering using a 10.5 GeV beam from the accelerator at JLab. The EMC effect is the phenomenon that the internal structure of the bound nucleon is different from that of a free nucleon. In this...
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I will outline the relevant physics, provide an overview of the experimental procedure, and present preliminary analysis results which include the first-time EMC effect results for several nuclei at large x.
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Unpolarised Generalised Parton Distributions on lattice QCD at physical mass We present a lattice QCD analysis of unpolarised generalised parton distributions (GPDs) of the proton. Our calculations are done on an ensamble with Nf = 2 + 1 + 1 (degenerate light quarks, strange and charm quarks) twisted mass fermions at physical mass with a clover improvement and lattice spacing a = 0.08 fm. We...
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Unpolarized twist-two GPD and the trace anomaly Abstract: We present a one-loop perturbative study of unpolarized twist-two generalized parton distributions (GPDs) for external on-shell gluon states. A finite quark mass 𝑚 is kept throughout: it serves as an infrared regulator and, crucially, enables an explicit realization of the full trace-anomaly relation. By taking second Mellin moments, we...
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Development of a Liquid Scintillator Veto Prototype for the DarkMESA and NuDoubt++ Experiments
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Probing Short-Ranged Correlations Across Scales Abstract: The mechanism of quark modification in bound nucleons (EMC effect) remains unexplained forty years after its initial observation. Inclusive DIS measurements have characterized the EMC effect for a wide range of nuclei, and experimental results from Jefferson Lab indicate that there is a strong correlation between the number of nucleons...
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A Practical Approach to Preserving Chirality in Lattice QCD: Kenney-Laub Rational Approximation to the Overlap Operator Abstract: We present a practical approach for implementing the overlap Dirac operator in lattice QCD that combines the Kenney–Laub (KL) rational iterates for the matrix sign function, their partial fraction decomposition enabling Multi-Shift Conjugate Gradient solvers, and...
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