DVCS off the Neutron: E08-025 Jlab Hall A Experiment
| Autor: | M. Benali, M. Mazouz |
|---|---|
| Přispěvatelé: | Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Quark
Physics Particle physics Photon generalized parton distribution quark: angular momentum Hadron High Energy Physics::Phenomenology Nuclear Theory Compton scattering Parton 7. Clean energy photon: electroproduction coherence sum rule: spin deeply virtual Compton scattering Quark–gluon plasma deuterium: target [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] Neutron High Energy Physics::Experiment n: target Sum rule in quantum mechanics Nuclear Experiment |
| Zdroj: | PoS 23rd International Symposium on Spin Physics 23rd International Symposium on Spin Physics, Sep 2018, Ferrara, Italy. pp.069, ⟨10.22323/1.346.0069⟩ Scopus-Elsevier |
| DOI: | 10.22323/1.346.0069⟩ |
| Popis: | International audience; Generalized parton distributions (GPDs) are considered as suitable tools to study the internal structure of hadrons in terms of quarks and gluons. The Measurement of Deeply Virtual Compton Scattering (DVCS) cross sections is the simplest way to access GPDs. In particular, DVCS off the neutron is sensitive to GPD E, the least constrained GPD, which is needed to determine the quark angular momentum via Ji's sum rule. E08-025 experiment was performed in Jlab Hall A to measure the unpolarized cross section of photon electroproduction off a deuterium target at $Q^2=1.75$ GeV$^2$ and $x_B=0.36$. After a brief description of the experimental setup, we will show the main steps of the data analysis. Finally, we will present our preliminary results on the photon electroproduction off the neutron and coherent deuteron, indicating for the first time a non-zero DVCS signal. |
| Databáze: | OpenAIRE |
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