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Title: Gottfried sum from the ratio F sub 2 sup n / F sub 2 sup p

Journal Article · · Physical Review Letters; (USA)

Experimental results obtained at the CERN Super Proton Synchrotron on the structure-function ratio {ital F}{sub 2}{sup {ital n}}/{ital F}{sub 2}{sup {ital p}} in the kinematic range 0.004{lt}{ital x}{lt}0.8 and 0.4{lt}{ital Q}{sup 2}{lt}190 GeV{sup 2}, together with the structure function {ital F}{sub 2}{sup {ital d}} determined from a fit to published data, are used to derive the difference {ital F}{sub 2}{sup {ital p}}({ital x}){minus}{ital F}{sub 2}{sup {ital n}}({ital x}). The value of the Gottfried sum {integral}({ital F}{sub 2}{sup {ital p}}{minus}{ital F}{sub 2}{sup {ital n}}){ital dx}/{ital x}=0.240{plus minus}0.016 is below the quark-parton-model expectation of 1/3.

OSTI ID:
5678054
Journal Information:
Physical Review Letters; (USA), Vol. 66:21; ISSN 0031-9007
Country of Publication:
United States
Language:
English