@article{oai:tsukuba.repo.nii.ac.jp:00041764, author = {原, 和彦 and 金, 信弘 and 佐藤, 構二 and 受川, 史彦 and CD Collaboration and Hara, K. and Kim, S.H. and Sato, K. and Ukegawa, F.}, issue = {9}, journal = {Physical review D}, month = {May}, note = {We report on a measurement of the D+-meson production cross section as a function of transverse momentum (pT) in proton-antiproton (p ̄p) collisions at 1.96 TeV center-of-mass energy, using the full data set collected by the Collider Detector at Fermilab in Tevatron Run II and corresponding to 10??fb?1 of integrated luminosity. We use D+→K?π+π+ decays fully reconstructed in the central rapidity region |y|<1 with transverse momentum down to 1.5??GeV/c, a range previously unexplored in p ̄p collisions. Inelastic p ̄p-scattering events are selected online using minimally biasing requirements followed by an optimized offline selection. The K?π+π+ mass distribution is used to identify the D+ signal, and the D+ transverse impact-parameter distribution is used to separate prompt production, occurring directly in the hard-scattering process, from secondary production from b-hadron decays. We obtain a prompt D+ signal of 2950 candidates corresponding to a total cross section σ(D+,1.5