Probing hard color-singlet exchange in collisions at = 630 GeV and 1800 GeV

Jets in p̄p Collisions at √ s = 630 and 1800 GeV

Results are presented from analyses of jet data produced in pp collisions at √ s = 630 and 1800 GeV collected with the DØ detector during the 1994–95 Fermilab Tevatron Collider run. We discuss details of detector calibration, and jet selection criteria in measurements of various jet production cross sections at √ s = 630 and 1800 GeV. The inclusive jet cross sections, the dijet mass spectrum, t...

The Ratio of the Direct Photon Production Cross Section at 630 GeV and at 1800 GeV

We measure the ratio of the isolated direct photon prodution cross section at √ s = 630 GeV to that at √ s = 1800 GeV for the central (|η| < 0.9) and forward (1.6 < |η| < 2.5) rapidity regions. We compare the result with next to leading order QCD predictions using CTEQ parton distribution functions.

High-pT jets in p̄p collisions at !sÄ630 and 1800 GeV

B. Abbott,56 A. Abdesselam,11 M. Abolins,49 V. Abramov,24 B. S. Acharya,16 D. L. Adams,58 M. Adams,36 G. A. Alves,2 N. Amos,48 E. W. Anderson,41 R. Astur,53 M. M. Baarmand,53 V. V. Babintsev,24 L. Babukhadia,53 T. C. Bacon,26 A. Baden,45 B. Baldin,35 P. W. Balm,19 S. Banerjee,16 E. Barberis,28 P. Baringer,42 J. F. Bartlett,35 U. Bassler,12 D. Bauer,26 A. Bean,42 M. Begel,52 A. Belyaev,23 S. B. ...

Ja n 20 06 Transverse - longitudinal HBT correlations in pp̄ collisions at √ s = 630 GeV

Correlations of like-sign pion pairs emerging from proton-antiproton collisions are analysed in the two-dimensional (q L , q T) decomposition of the three-momentum difference q. While the data cannot be adequately represented by gaussian, exponential , power-law or Edgeworth parametrisations, more elaborate ones such as Lévy and an exponential with a cross term do better. A two-scale model usin...

Events with a Rapidity Gap between Jets in p̅p Collisions at √s = 630 GeV