D. Orris
University of Pittsburgh
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Featured researches published by D. Orris.
Physical Review Letters | 1991
G. Alverson; P. F. Shepard; M. Glaubman; K. Ruddick; L. Sorrell; W. Toothacker; David A. Brown; E. Prebys; D. Skow; T. Chand; G. Fanourakis; J. Dunlea; C. Yosef; J. Huston; W. DeSoi; W. H. Chung; M. Zielinski; C. Bromberg; B. Y. Oh; D. Weerasundara; I. Kourbanis; G. Ginther; D. Berg; B. M. Rajaram; B.C. Choudhardy; T. Yasuda; W. Dlugosz; David C. Carey; R. K. Shivpuri; F. Lobkowicz
We report new measurements of inclusive direct photon production at high transverse momenta (pT) for π - and p interactions on Be at 500 Gev/r. The yields as a function of pT and rapidity (y) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark and gluon structure functions
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
E. Engels; S. Mani; D. Orris; P. F. Shepard; P.D. Weerasundara; B. Choudhary; U. Joshi; V. Kapoor; R. K. Shivpuri; W. Baker; D. Berg; D. Carey; C. Johnstone; C. Nelson; C. Bromberg; David A. Brown; J. Huston; R. Miller; A. Nguyen; R. Benson; P. Lukens; K. Ruddick; G. Alverson; W. Faissler; D. Garelick; M. Glaubman; I. Kourbanis; C. Lirakis; E. Pothier; A. Sinanidis
Abstract A charged particle spectrometer containing a 7120-channel silicon microstrip detector system, one component of Fermilab experiment E706 to study direct photon production in hadron-hadron collisions, was utilized in a run in which 6 million events were recorded. We describe the silicon system, provide early results of track and vertex reconstruction, and present data on the radiation damage to the silicon wafers resulting from the narrow high intensity beam.
Physical Review Letters | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; de Barbaro L; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We report new measurements of inclusive direct photon production at high transverse momenta (pT) for π - and p interactions on Be at 500 Gev/r. The yields as a function of pT and rapidity (y) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark and gluon structure functions
Physical Review Letters | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We report new measurements of inclusive direct photon production at high transverse momenta (pT) for π - and p interactions on Be at 500 Gev/r. The yields as a function of pT and rapidity (y) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark and gluon structure functions
Physical Review Letters | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We report new measurements of inclusive direct photon production at high transverse momenta (pT) for π - and p interactions on Be at 500 Gev/r. The yields as a function of pT and rapidity (y) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark and gluon structure functions
Physical Review D | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We present new measurements of {pi}{sup 0} production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be and Cu targets at 500 GeV/{ital c}. The observed dependence of the yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) is compared with expectations from leading-log QCD over a kinematic range in which the inclusive cross sections fall by more than 4 orders of magnitude.
Physical Review D | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We present new measurements of {pi}{sup 0} production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be and Cu targets at 500 GeV/{ital c}. The observed dependence of the yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) is compared with expectations from leading-log QCD over a kinematic range in which the inclusive cross sections fall by more than 4 orders of magnitude.
Physical Review D | 1992
G. Alverson; W. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone
We present new measurements of {pi}{sup 0} production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be and Cu targets at 500 GeV/{ital c}. The observed dependence of the yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) is compared with expectations from leading-log QCD over a kinematic range in which the inclusive cross sections fall by more than 4 orders of magnitude.
Physical Review D | 1991
G. Alverson; P. F. Shepard; M. Glaubman; K. Ruddick; L. Sorrell; W. Toothacker; David A. Brown; E. Prebys; D. Skow; T. Chand; G. Fanourakis; J. Dunlea; C. Yosef; B. Choudhary; W. DeSoi; W. H. Chung; M. Zielinski; C. Bromberg; B. Y. Oh; D. Weerasundara; I. Kourbanis; G. Ginther; D. Berg; B. M. Rajaram; T. Yasuda; W. Dlugosz; David C. Carey; R. K. Shivpuri; F. Lobkowicz; C. Lirakis
We present new measurements of {pi}{sup 0} production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be and Cu targets at 500 GeV/{ital c}. The observed dependence of the yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) is compared with expectations from leading-log QCD over a kinematic range in which the inclusive cross sections fall by more than 4 orders of magnitude.
Physical Review D | 1993
G. Alverson; W. F. Baker; G. Ballocchi; R. Benson; D. Berg; S. Blusk; C. Bromberg; David A. Brown; D. Carey; T. Chand; C. Chandlee; B. C. Choudhary; W. H. Chung; L. de Barbaro; W. DeSoi; W. Dlugosz; J. Dunlea; S. Easo; E. Engels; W. Faissler; G. Fanourakis; T. Ferbel; D. Garelick; G. Ginther; G. Glass; M. Glaubman; P. Gutierrez; K. Hartman; J. Huston; C. Johnstone