Measurement of Virtual Compton Scattering Below Pion Threshold at Invariant Four-momentum Transfer Squared Q2 PDF Download
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Author: Christophe Jutier
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ISBN:
Category : Electrons, Compton
Languages : en
Pages : 458
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Author: Christophe Jutier
Publisher:
ISBN:
Category : Electrons, Compton
Languages : en
Pages : 458
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Author:
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ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 734
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![Virtual Compton Scattering Under [pi] ̊ Threshold at Q2 PDF](https://books.google.com/books/content/images/frontcover/OC9NzQEACAAJ?fife=w80-h100)
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Category :
Languages : en
Pages : 4
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Category : Dissertation abstracts
Languages : en
Pages : 776
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Category :
Languages : en
Pages :
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Author: L. Van Hoorebeke
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Category :
Languages : en
Pages :
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Virtual Compton Scattering o013 the proton has been studied at Q 2 -values of 1:0 and 1:9 (GeV=c) 2 in Hall A at the Thomas Je013erson National Accelerator Facility (JLab). Data were taken below and above the pion production threshold as well as in the resonance region. Results obtained below pion threshold at Q 2 = 1:0 (GeV=c) 2 are presented in this paper.
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Category :
Languages : en
Pages :
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The authors calculate the cross section of the deeply virtual Compton scattering at large energies and intermediate momentum transfers. In recent years the study of the deeply virtual Compton scattering (DVCS) became one of the most popular topics in QCD due to the fact that it is determined by skewed parton distributions which generalize usual parton densities introduced by Feynman. These new probes of the nucleon structure are accessible in exclusive processes such as DVCS and potentially they can give more information than the traditional parton densities. In this paper the authors consider the small-x DVCS where the energy of the incoming virtual photon E is very large in comparison to its virtuality Q2. To be specific, they calculate the DVCS amplitude in the region s” Q2” -t” m2 where s = 2mE, m is the nucleon mass, and t is the momentum transfer. The DVCS in this region is a semihard process which can be described by the BFKL (Balitsky-Fadin-Kuraev-Lipatov) pomeron. It turns out that at large momentum transfer the coupling of the BFKL pomeron to the nucleon is essentially equal to the Dirac form factor of the nucleon F1(t), so the DVCS amplitude in the region can be calculated without any model assumptions. The results obtained in this region can be used for the estimates of the amplitude at experimentally accessible energies where one or more conditions in Eq. (1) are relaxed. To be specific, they have in mind the HERA kinematics where x H"10−2 ̦ 10−4, Q2 e"6 GeV2, and -t H"1 ̦ 5 GeV2. Since there are only model predictions for the small-x DVCS in current literature, even the approximate calculations of the cross section in QCD are very timely.
Author:
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Category : Nuclear energy
Languages : en
Pages : 1212
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Category :
Languages : en
Pages :
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Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages : 1068
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