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We propose a formula to determine the first moment of difference between thepolarized $\bar u$- and $\bar d$-quarks in the nucleon, {\it i.e.} $\Delta\baru-\Delta \bar d$ from the Drell-Yan processes in collisions of unpolarizedhadrons with longitudinally polarized nucleons by measuring outgoing leptonhelicities. As coefficients in the differential cross section depend on the$u$- and $d$-quark numbers in the unpolarized hadron beam, the difference$\Delta\bar u-\Delta\bar d$ can be independently tested by changing the hadronbeam. Moreover, a formula for estimating the $K$-factor in Drell-Yan processesis also suggested.Comment: 10 pages, 1 figur

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Polarized light-flavor antiquarks from Drell-Yan processes of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>h</mml:mi><mml:mo>+</mml:mo><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>l</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mo>+</mml:mo…

Polarized light-flavor antiquarks from Drell-Yan processes ofh+N→→l±+