New measurements of the European Muon Collaboration effect in very light nuclei

J Seely; A Daniel; D Gaskell; J Arrington; N Fomin; P Solvignon; R Asaturyan; F Benmokhtar; W Boeglin; B Boillat; P Bosted; A Bruell; M H S Bukhari; M E Christy; B Clasie; S Connell; M M Dalton; D Day; J Dunne; D Dutta; L El Fassi; R Ent; H Fenker; B W Filippone; H Gao; C Hill; R J Holt; T Horn; E Hungerford; M K Jones; J Jourdan; N Kalantarians; C E Keppel; D Kiselev; M Kotulla; C Lee; A F Lung; S Malace; D G Meekins; T Mertens; H Mkrtchyan; T Navasardyan; G Niculescu; I Niculescu; H Nomura; Y Okayasu; A K Opper; C Perdrisat; D H Potterveld; V Punjabi; X Qian; P E Reimer; J Roche; V M Rodriguez; O Rondon; E Schulte; E Segbefia; K Slifer; G R Smith; V Tadevosyan; S Tajima; L Tang; G Testa; R Trojer; V Tvaskis; W F Vulcan; F R Wesselmann; S A Wood; J Wright; L Yuan; X Zheng

doi:10.1103/PhysRevLett.103.202301

New measurements of the European Muon Collaboration effect in very light nuclei

Phys Rev Lett. 2009 Nov 13;103(20):202301. doi: 10.1103/PhysRevLett.103.202301. Epub 2009 Nov 13.

Authors

J Seely¹, A Daniel, D Gaskell, J Arrington, N Fomin, P Solvignon, R Asaturyan, F Benmokhtar, W Boeglin, B Boillat, P Bosted, A Bruell, M H S Bukhari, M E Christy, B Clasie, S Connell, M M Dalton, D Day, J Dunne, D Dutta, L El Fassi, R Ent, H Fenker, B W Filippone, H Gao, C Hill, R J Holt, T Horn, E Hungerford, M K Jones, J Jourdan, N Kalantarians, C E Keppel, D Kiselev, M Kotulla, C Lee, A F Lung, S Malace, D G Meekins, T Mertens, H Mkrtchyan, T Navasardyan, G Niculescu, I Niculescu, H Nomura, Y Okayasu, A K Opper, C Perdrisat, D H Potterveld, V Punjabi, X Qian, P E Reimer, J Roche, V M Rodriguez, O Rondon, E Schulte, E Segbefia, K Slifer, G R Smith, V Tadevosyan, S Tajima, L Tang, G Testa, R Trojer, V Tvaskis, W F Vulcan, F R Wesselmann, S A Wood, J Wright, L Yuan, X Zheng

Affiliation

¹ Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

PMID: 20365978
DOI: 10.1103/PhysRevLett.103.202301

Abstract

New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from (2)H, (3)He, (4)He, (9)Be and (12)C for 0.3 < x < 0.9, Q(2) approximately 3-6 GeV(2). These data represent the first measurement of the EMC effect for (3)He at large x and a significant improvement for (4)He. The data do not support previous A-dependent or density-dependent fits to the EMC effect and suggest that the nuclear dependence of the quark distributions may depend on the local nuclear environment.