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Dive into the research topics where M. E. Beddo is active.

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Featured researches published by M. E. Beddo.


Physical Review Letters | 1999

Measurement of J / psi and psi-prime suppression in p-A collisions at 800-GeV/c

M. J. Leitch; P. L. McGaughey; E. A. Hawker; M. E. Sadler; M. E. Beddo; T. H. Chang; B. A. Mueller; Paul E. Reimer; W. M. Lee; D. F. Geesaman; T. A. Carey; R. S. Towell; X. He; S. Kaufman; D. D. Koetke; C. A. Gagliardi; P. W. Stankus; G. R. Young; J. M. Moss; W. E. Sondheim; Vasilev; Daniel M. Kaplan; J. L. Willis; G. T. Garvey; V. Papavassiliou; L. Isenhower; J. C. Peng; C. N. Brown; W. E. Cooper; J. C. Webb

Measurements of the suppression of the yield per nucleon of J/psi and psi() production for 800 GeV/ c protons incident on heavy nuclear targets, relative to light nuclear targets, have been made with very broad coverage in x(F) and p(T). The observed suppression is smallest at x(F) values of 0.25 and below, and increases at larger values of x(F). It is also strongest at small p(T). Substantial differences between psi() and J/psi production are observed for the first time in p-A collisions. The suppression for psi() production is stronger than that for J/psi for x(F) near zero, but becomes comparable to that for J/psi for x(F)>0.6.


Physical Review Letters | 1999

Parton Energy Loss Limits and Shadowing in Drell-Yan Dimuon Production

M. Vasiliev; M. E. Beddo; C. N. Brown; T. A. Carey; T. H. Chang; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; Daniel M. Kaplan; S. Kaufman; D. D. Koetke; W. M. Lee; M. J. Leitch; P. L. McGaughey; J. M. Moss; B. A. Mueller; V. Papavassiliou; J. C. Peng; G. Petitt; P. E. Reimer; M. E. Sadler; W. E. Sondheim; P. W. Stankus; R. S. Towell; R. E. Tribble; J. C. Webb

A precise measurement of the ratios of the Drell-Yan cross section per nucleon for an 800 GeV/{ital c} proton beam incident on Be, Fe, and W targets is reported. The behavior of the Drell-Yan ratios at small target-parton momentum fraction is well described by an existing fit to the shadowing observed in deep-inelastic scattering. The cross-section ratios as a function of the incident-parton momentum fraction set tight limits on the energy loss of quarks passing through a cold nucleus. {copyright} {ital 1999} {ital The American Physical Society}


Physical Review D | 2001

Improved measurement of the anti-d / anti-u asymmetry in the nucleon sea

R. S. Towell; P. L. McGaughey; E. A. Hawker; M. E. Sadler; B. K. Park; M. L. Brooks; D. M. Lee; R. E. Tribble; J. D. Bush; M. E. Beddo; Y. C. Wang; T. H. Chang; B. A. Mueller; Paul E. Reimer; W. M. Lee; D. F. Geesaman; T. A. Carey; X. He; S. Kaufman; D. D. Koetke; C. A. Gagliardi; P. Kirk; P. W. Stankus; G. R. Young; Z. F. Wang; T. C. Awes; J. M. Moss; W. E. Sondheim; Vasilev; M. J. Leitch

Measurements of the ratio of Drell-Yan yields from an 800 rm{GeV/c} proton beam incident on liquid hydrogen and deuterium targets are reported. Approximately 360,000 Drell-Yan muon pairs remained after all cuts on the data. From these data, the ratio of anti-down (


Physical Review Letters | 2003

J/psi polarization in 800-GeV p-Cu interactions.

T. H. Chang; M. E. Beddo; C. N. Brown; T. A. Carey; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; Daniel M. Kaplan; S. Kaufman; D. D. Koetke; P. L. McGaughey; W. M. Lee; M. J. Leitch; J. M. Moss; B. A. Mueller; V. Papavassiliou; J. C. Peng; P. E. Reimer; M. E. Sadler; W. E. Sondheim; P. W. Stankus; R. S. Towell; R. E. Tribble; M. A. Vasiliev; J. C. Webb; J. L. Willis

bar{d}


Physical Review D | 1998

d̄/ū asymmetry and the origin of the nucleon sea

J. C. Peng; G. T. Garvey; T. C. Awes; M. E. Beddo; M. L. Brooks; C. N. Brown; J. D. Bush; T. A. Carey; T. H. Chang; W. E. Cooper; C. A. Gagliardi; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; S. Kaufman; Daniel M. Kaplan; P. Kirk; D. D. Koetke; G. S. Kyle; D. M. Lee; W. M. Lee; M. J. Leitch; N. Makins; P. L. McGaughey; J. M. Moss; B. A. Mueller; P. M. Nord; B. K. Park; V. Papavassiliou

) to anti-up (


Physical Review C | 1999

Analyzing powers for the π − p → → π 0 n reaction across the Δ ( 1232 ) resonance

C. V. Gaulard; C. M. Riedel; J. F. Amann; M. E. Beddo; R. L. Boudrie; G. R. Burleson; P. L. Cole; K. Craig; M. A. Espy; L. Isenhower; T. E. Kasprzyk; K. R. Knight; C. L. Morris; S. I. Penttilä; D. Rigsby; M. E. Sadler; E. Six; H. M. Spinka; I. Supek; G.J. Wagner; Q. Zhao

bar{u}


INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 8th Conference CIPANP2003 | 2004

Measurement of the Absolute Drell‐Yan Dimuon Cross Section in 800 GeV/c Proton‐Proton and Proton‐Deuterium Collisions

P. E. Reimer; J. C. Webb; T. C. Awes; M. E. Beddo; M. L. Brooks; C. N. Brown; J. D. Bush; T. A. Carey; T. H. Chang; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; Daniel M. Kaplan; S. Kaufman; P. Kirk; D. D. Koetke; G. S. Kyle; D. M. Lee; W. M. Lee; M. J. Leitch; N. Makins; P. L. McGaughey; J. M. Moss; B. A. Mueller; P. M. Nord; V. Papavassiliou

) quark distributions in the proton sea is determined over a wide range in Bjorken-


Physical Review D | 1998

{bar d}/{bar u} asymmetry and the origin of the nucleon sea

J. D. Bush; L. Isenhower; M. E. Sadler; R. S. Towell; J. L. Willis; Derek K. Wise; D. F. Geesaman; S. Kaufman; N. Makins; B. A. Mueller; C. N. Brown; W. E. Cooper; X. He; W. M. Lee; G. Petitt; Daniel M. Kaplan; J. C. Peng; G. T. Garvey; M. L. Brooks; T. A. Carey; D. M. Lee; M. J. Leitch; P. L. McGaughey; J. M. Moss; B. K. Park; Paul E. Reimer; W. E. Sondheim; T. N. Thompson; P. Kirk; Y. C. Wang

x


AIP Conference Proceedings | 2008

A preliminary measurement of the ū/d̄ asymmetry in the proton sea

P. E. Reimer; T. C. Awes; M. E. Beddo; C. N. Brown; J. D. Bush; T. A. Carey; T. H. Chang; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; S. Kaufman; Daniel M. Kaplan; P. Kirk; D. D. Koetke; G. S. Kyle; D. M. Lee; W. M. Lee; M. J. Leitch; N. Makins; P. L. McGaughey; J. M. Moss; P. M. Nord; B. K. Park; V. Papavassiliou; J. C. Peng; G. Petitt

. These results confirm previous measurements by E866 and extend them to lower


Physical Review Letters | 2003

[formula presented] polarization in 800-gev [formula presented] interactions

T. H. Chang; M. E. Beddo; C. N. Brown; T. A. Carey; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. He; L. Isenhower; Daniel M. Kaplan; S. Kaufman; D. D. Koetke; P. L. McGaughey; W. M. Lee; M. J. Leitch; J. M. Moss; B. A. Mueller; V. Papavassiliou; J. C. Peng; P. E. Reimer; M. E. Sadler; W. E. Sondheim; P. W. Stankus; R. S. Towell; R. E. Tribble; M. Vasiliev; J. C. Webb; J. L. Willis

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Collaboration


Dive into the M. E. Beddo's collaboration.

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L. Isenhower

Abilene Christian University

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D. F. Geesaman

Argonne National Laboratory

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J. M. Moss

Los Alamos National Laboratory

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B. A. Mueller

Argonne National Laboratory

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Daniel M. Kaplan

Illinois Institute of Technology

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G. T. Garvey

Los Alamos National Laboratory

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M. E. Sadler

Abilene Christian University

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M. J. Leitch

Los Alamos National Laboratory

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S. Kaufman

Argonne National Laboratory

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