  The LHC heavy ion data for W/Z production can provide new incisive
information on the PDFs. This data is sensitive to the heavier quark flavors
(strange and charm) in a high energy kinematic region; this can facilitate the
determination of PDFs in the small x region where previous data was limited. At
present, the flavor separation of the proton PDFs is dependent on DIS data from
nuclear targets. Therefore, improved nuclear corrections can also yield
enhanced flavor determination of both the proton and nuclear PDFs.
