Scaling of the F-2 Structure Function in Nuclei and Quark Distributions at x > 1

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2010

Authors

Fomin, N
Arrington, J
Day, DB
Gaskell, D
Daniel, A
Seely, J
Asaturyan, R
Benmokhtar, F
Boeglin, W
Boillat, B

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Abstract

We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x > 1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the "superfast" quarks probed at x > 1. The falloff at x > 1 is noticeably stronger in H-2 and He-3, but nearly identical for all heavier nuclei.

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inclusive electron-scattering, inelastic lepton scattering, dependence, physics, multidisciplinary

Citation

Fomin,N.;Arrington,J.;Day,D. B.;Gaskell,D.;Daniel,A.;Seely,J.;Asaturyan,R.;Benmokhtar,F.;Boeglin,W.;Boillat,B.;Bosted,P.;Bruell,A.;Bukhari,M. H. S.;Christy,M. E.;Chudakov,E.;Clasie,B.;Connell,S. H.;Dalton,M. M.;Dutta,D.;Ent,R.;El Fassi,L.;Fenker,H.;Filippone,B. W.;Garrow,K.;Hill,C.;Holt,R. J.;Horn,T.;Jones,M. K.;Jourdan,J.;Kalantarians,N.;Keppel,C. E.;Kiselev,D.;Kotulla,M.;Lindgren,R.;Lung,A. F.;Malace,S.;Markowitz,P.;Mckee,P.;Meekins,D. G.;Miyoshi,T.;Mkrtchyan,H.;Navasardyan,T.;Niculescu,G.;Okayasu,Y.;Opper,A. K.;Perdrisat,C.;Potterveld,D. H.;Punjabi,V.;Qian,X.;Reimer,P. E.;Roche,J.;Rodriguez,V. M.;Rondon,O.;Schulte,E.;Segbefia,E.;Slifer,K.;Smith,G. R.;Solvignon,P.;Tadevosyan,V.;Tajima,S.;Tang,L.;Testa,G.;Trojer,R.;Tvaskis,V.;Vulcan,W. F.;Wasko,C.;Wesselmann,F. R.;Wood,S. A.;Wright,J.;Zheng,X.. 2010. Scaling of the F-2 Structure Function in Nuclei and Quark Distributions at x > 1. Physical Review Letters 105(21): 212502-212502.

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https://hdl.handle.net/10161/4305

Published Version (Please cite this version)

10.1103/PhysRevLett.105.212502

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