The Inclusive Jet Cross Section in pp Collisions at

We report on the preliminary measurement of the inclusive jet cross section for jjj 0:5 at p s = 1:8 TeV. Two data sets with integrated luminosities of 91 pb \Gamma1 and 14 pb \Gamma1 were collected at the Fermilab Tevatron pp Collider with the DØ detector. The inclusive jet cross sections are measured and reported as a function of transverse jet energy (35 GeV E T 470 GeV) are in excellent agreement with next--to--leading order QCD. I. INTRODUCTION High transverse momentum jets are predominately produced in proton--antiproton collisions by two body scattering of a single proton constituent with an antiproton constituent. Such events typically produce a pair of back--to--back jets (clusters of particles), each resulting from the fragmentation of a final state quark or gluon. Predictions for the inclusive jet cross section Submitted to the XI th Topical Workshop on pp Collider Physics, Abano Terme (Padova), Italy May 26 -- June 1, 1996. have been made using next--to--le..

DØ Note xxx

First experimental results are presented from a search for events with a rapidity gap between jets. The DØ detector was used to examine events produced by the Fermilab Tevatron p¯p collider at p s = 1.8 TeV. The fraction of events with an observed rapidity gap between the two highest transverse energy (E T ) jets is measured as a function of the pseudorapidity separation between the jet edges (\Deltaj c ). An upper limit at the 95% confidence level of 1:1 \Theta 10 \Gamma2 is obtained on the fraction of events with no particles between the jets, for events with \Deltaj c ?3 and jet E T greater than 30 GeV. PACS numbers: 13.87.-a, 12.38.Qk, 13.85.Hd Typeset using REVT E X Rapidity gaps, which are regions of rapidity containing no particles, have historically been associated with elastic and diffractive scattering. Rapidity gaps have also recently been observed in deep inelastic scattering events [1]. In addition to these typically low transverse momentum processes, rapidity gaps a..

Are coral-dwelling crabs monophyletic? A phylogeny of the Trapezioidea (Crustacea:Decapoda:Brachyura)

10.1071/IS09012Invertebrate Systematics234402-408ISNY