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16 April 2024

» pubmed » pmid17501338

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Compton-scattering cross section on the proton at high momentum transfer
A Danagoulian ; V H Mamyan ; M Roedelbronn ; K A Aniol ; J R M Ann ; P Y Bertin ; L Bimbot ; P Bosted ; J R Calarco ; A Camsonne ; C C Chang ; T-H Chang ; J-P Chen ; Seonho Choi ; E Chudakov ; P Degtyarenko ; C W de Jager ; A Deur ; D Dutta ; K Egiyan ; H Gao ; F Garibaldi ; O Gayou ; R Gilman ; A Glamazdin ; C Glashausser ; J Gomez ; D J Hamilton ; J-O Hansen ; D Hayes ; D W Higinbotham ; W Hinton ; T Horn ; C Howell ; T Hunyady ; C E Hyde ; X Jiang ; M K Jones ; M Khandaker ; A Ketikyan ; V Kubarovsky ; K Kramer ; G Kumbartzki ; G Laveissière ; J Lerose ; R A Lindgren ; D J Margaziotis ; P Markowitz ; K McCormick ; D G Meekins ; Z-E Meziani ; R Michaels ; P Moussiegt ; S Nanda ; A M Nathan ; D M Nikolenko ; V Nelyubin ; B E Norum ; K Paschke ; L Pentchev ; C F Perdrisat ; E Piasetzky ; R Pomatsalyuk ; V A Punjabi ; I Rachek ; A Radyushkin ; B Reitz ; R Roche ; G Ron ; F Sabatié ; A Saha ; N Savvinov ; A Shahinyan ; Y Shestakov ; S Sirca ; K Slifer ; P Solvignon ; P Stoler ; S Tajima ; V Sulkosky ; L Todor ; B Vlahovic ; L B Weinstein ; K Wang ; B Wojtsekhowski ; H Voskanyan ; H Xiang ; X Zheng ; L Zhu ; ;
Date:	13 Apr 2007
Journal:	Phys Rev Lett, 98 (15), 152001
Abstract:	Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s=5-11 and -t=2-7 GeV2 with a statistical accuracy of a few percent. The scaling power for the s dependence of the cross section at fixed center-of-mass angle was found to be 8.0+/-0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark.
Source:	PubMed, pmid17501338
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