Improved measurement of the d̄/ū asymmetry in the nucleon sea

R. S. Towell; P. L. McGaughey; 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. C. He; L. D. Isenhower; D. M. Kaplan; S. B. Kaufman; P. N. Kirk; D. D. Koetke; G. Kyle; D. M. Lee; W. M. Lee; M. J. Leitch; Naomi C R Makins; J. M. Moss; B. A. Mueller; P. M. Nord; V. Papavassiliou; B. K. Park; Jen-Chieh Peng; G. Petitt; P. E. Reimer; M. E. Sadler; W. E. Sondheim; P. W. Stankus; T. N. Thompson; R. E. Tribble; M. A. Vasiliev; Y. C. Wang; Z. F. Wang; J. C. Webb; J. L. Willis; D. K. Wise; G. R. Young

doi:10.1103/PhysRevD.64.052002

Improved measurement of the d̄/ū asymmetry in the nucleon sea

R. S. Towell, P. L. McGaughey, 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. C. He, L. D. Isenhower, D. M. Kaplan, S. B. Kaufman, P. N. Kirk, D. D. KoetkeG. Kyle, D. M. Lee, W. M. Lee, M. J. Leitch, Naomi C R Makins, J. M. Moss, B. A. Mueller, P. M. Nord, V. Papavassiliou, B. K. Park, Jen-Chieh Peng, G. Petitt, P. E. Reimer, M. E. Sadler, W. E. Sondheim, P. W. Stankus, T. N. Thompson, R. E. Tribble, M. A. Vasiliev, Y. C. Wang, Z. F. Wang, J. C. Webb, J. L. Willis, D. K. Wise, G. R. Young

Research output: Contribution to journal › Article › peer-review

Abstract

Measurements of the ratio of Drell-Yan yields from an 800 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 down antiquark (d̄) to up (ū) antiquark distributions in the proton sea is determined over a wide range in Bjorken-x. These results confirm previous measurements by E866 and extend them to lower x. From these data, (d̄-ū) and ∫ (d̄-ū)dx are evaluated for 0.015<x<0.35. These results are compared with parametrizations of various parton distribution functions, models and experimental results from NA51, NMC and HERMES.

Original language	English (US)
Article number	052002
Pages (from-to)	52002-1 - 52002-16
Number of pages	16
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	64
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.64.052002
State	Published - Sep 1 2001
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Online availability

10.1103/PhysRevD.64.052002

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Towell, R. S., McGaughey, P. L., Awes, T. C., Beddo, M. E., Brooks, M. L., Brown, C. N., Bush, J. D., Carey, T. A., Chang, T. H., Cooper, W. E., Gagliardi, C. A., Garvey, G. T., Geesaman, D. F., Hawker, E. A., He, X. C., Isenhower, L. D., Kaplan, D. M., Kaufman, S. B., Kirk, P. N., ... Young, G. R. (2001). Improved measurement of the d̄/ū asymmetry in the nucleon sea. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(5), 52002-1 - 52002-16. Article 052002. https://doi.org/10.1103/PhysRevD.64.052002

Towell, RS, McGaughey, PL, Awes, TC, Beddo, ME, Brooks, ML, Brown, CN, Bush, JD, Carey, TA, Chang, TH, Cooper, WE, Gagliardi, CA, Garvey, GT, Geesaman, DF, Hawker, EA, He, XC, Isenhower, LD, Kaplan, DM, Kaufman, SB, Kirk, PN, Koetke, DD, Kyle, G, Lee, DM, Lee, WM, Leitch, MJ, Makins, NCR, Moss, JM, Mueller, BA, Nord, PM, Papavassiliou, V, Park, BK, Peng, J-C, Petitt, G, Reimer, PE, Sadler, ME, Sondheim, WE, Stankus, PW, Thompson, TN, Tribble, RE, Vasiliev, MA, Wang, YC, Wang, ZF, Webb, JC, Willis, JL, Wise, DK & Young, GR 2001, 'Improved measurement of the d̄/ū asymmetry in the nucleon sea', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 64, no. 5, 052002, pp. 52002-1 - 52002-16. https://doi.org/10.1103/PhysRevD.64.052002

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title = "Improved measurement of the {\=d}/ū asymmetry in the nucleon sea",

abstract = "Measurements of the ratio of Drell-Yan yields from an 800 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 down antiquark ({\=d}) to up (ū) antiquark distributions in the proton sea is determined over a wide range in Bjorken-x. These results confirm previous measurements by E866 and extend them to lower x. From these data, ({\=d}-ū) and ∫ ({\=d}-ū)dx are evaluated for 0.015",

author = "Towell, {R. S.} and McGaughey, {P. L.} and Awes, {T. C.} and Beddo, {M. E.} and Brooks, {M. L.} and Brown, {C. N.} and Bush, {J. D.} and Carey, {T. A.} and Chang, {T. H.} and Cooper, {W. E.} and Gagliardi, {C. A.} and Garvey, {G. T.} and Geesaman, {D. F.} and Hawker, {E. A.} and He, {X. C.} and Isenhower, {L. D.} and Kaplan, {D. M.} and Kaufman, {S. B.} and Kirk, {P. N.} and Koetke, {D. D.} and G. Kyle and Lee, {D. M.} and Lee, {W. M.} and Leitch, {M. J.} and Makins, {Naomi C R} and Moss, {J. M.} and Mueller, {B. A.} and Nord, {P. M.} and V. Papavassiliou and Park, {B. K.} and Jen-Chieh Peng and G. Petitt and Reimer, {P. E.} and Sadler, {M. E.} and Sondheim, {W. E.} and Stankus, {P. W.} and Thompson, {T. N.} and Tribble, {R. E.} and Vasiliev, {M. A.} and Wang, {Y. C.} and Wang, {Z. F.} and Webb, {J. C.} and Willis, {J. L.} and Wise, {D. K.} and Young, {G. R.}",

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doi = "10.1103/PhysRevD.64.052002",

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T1 - Improved measurement of the d̄/ū asymmetry in the nucleon sea

AU - Towell, R. S.

AU - McGaughey, P. L.

AU - Awes, T. C.

AU - Beddo, M. E.

AU - Brooks, M. L.

AU - Brown, C. N.

AU - Bush, J. D.

AU - Carey, T. A.

AU - Chang, T. H.

AU - Cooper, W. E.

AU - Gagliardi, C. A.

AU - Garvey, G. T.

AU - Geesaman, D. F.

AU - Hawker, E. A.

AU - He, X. C.

AU - Isenhower, L. D.

AU - Kaplan, D. M.

AU - Kaufman, S. B.

AU - Kirk, P. N.

AU - Koetke, D. D.

AU - Kyle, G.

AU - Lee, D. M.

AU - Lee, W. M.

AU - Leitch, M. J.

AU - Makins, Naomi C R

AU - Moss, J. M.

AU - Mueller, B. A.

AU - Nord, P. M.

AU - Papavassiliou, V.

AU - Park, B. K.

AU - Peng, Jen-Chieh

AU - Petitt, G.

AU - Reimer, P. E.

AU - Sadler, M. E.

AU - Sondheim, W. E.

AU - Stankus, P. W.

AU - Thompson, T. N.

AU - Tribble, R. E.

AU - Vasiliev, M. A.

AU - Wang, Y. C.

AU - Wang, Z. F.

AU - Webb, J. C.

AU - Willis, J. L.

AU - Wise, D. K.

AU - Young, G. R.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - Measurements of the ratio of Drell-Yan yields from an 800 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 down antiquark (d̄) to up (ū) antiquark distributions in the proton sea is determined over a wide range in Bjorken-x. These results confirm previous measurements by E866 and extend them to lower x. From these data, (d̄-ū) and ∫ (d̄-ū)dx are evaluated for 0.015

AB - Measurements of the ratio of Drell-Yan yields from an 800 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 down antiquark (d̄) to up (ū) antiquark distributions in the proton sea is determined over a wide range in Bjorken-x. These results confirm previous measurements by E866 and extend them to lower x. From these data, (d̄-ū) and ∫ (d̄-ū)dx are evaluated for 0.015

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DO - 10.1103/PhysRevD.64.052002

M3 - Article

AN - SCOPUS:19244375409

SN - 0556-2821

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SP - 52002-1 - 52002-16

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 5

M1 - 052002

ER -

Improved measurement of the d̄/ū asymmetry in the nucleon sea

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