Baringer, Philip S.Abbott, B.Abolins, M.Abramov, V.Acharya, B. S.Adam, I.Adams, D. L.Adams, M.Ahn, S.Aihara, H.2014-10-222014-10-221999-05-26B. Abbott et al. ((DØ Collaboration)). (1999.) "Measurement of the top quark pair production cross section in pp-bar collisions using multijet final states." Physical Review D, 60(1):012001. http://dx.doi.org/10.1103/PhysRevD.60.0120011550-7998https://hdl.handle.net/1808/15345This if the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.60.012001.We have studied tt-bar production using multijet final states in pp-bar collisions at a center-of-mass energy of 1.8 TeV, with an integrated luminosity of 110.3 pb(-1). Each of the top quarks with these final states decays exclusively to a bottom quark and a W boson, with the W bosons decaying into quark-antiquark pairs. The analysis has been optimized using neural networks to achieve the smallest expected fractional uncertainty on the tt-bar production cross section, and yields a cross section of 7.1±2.8 (stat)±1.5 (syst) pb, assuming a top quark mass of 172.1 GeV/c(2). Combining this result with previous DØ measurements, where one or both of the W bosons decay leptonically, gives a tt-bar production cross section of 5.9±1.2 (stat)±1.1 (syst)pb.Article10.1103/PhysRevD.60.012001openAccess