Tests of proton structure functions using leptons at CDF and DO/: {ital W} charge asymmetry and Drell-Yan production
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States)
High statistics {ital W} charge asymmetry measurements at the Tevatron {bar {ital p}}{ital p} collider significantly constrain the {ital u} and {ital d} quark distributions, and specifically the slope of the {ital d}({ital x})/{ital u}({ital x}) in the {ital x} range 0.007 to 0.27. We present measurements of the lepton charge asymmetry as a function of lepton rapidity, {ital A}({ital y}{sub {ital l}}) at {radical}{ital s}=1.8 TeV for {parallel}{ital y}{sub {ital l}}{parallel}{lt}2.0, for {ital W} decays to electrons and muons recorded by the CDF detector during the 1992{endash}93 run ({approx_equal}20 {ital pb}{sup {minus}1}), and the first {approx_equal}50 {ital pb}{sup {minus}1} of data from the 1994{endash}95 run. These precise data make possible further discrimination between sets of modern parton distributions. In particular it is found that the most recent parton distributions, which included the CDF 1992{endash}93 W asymmetry data in their fits (MRSA, CTEQ3M and GRV94) are still in good agreement with the more precise data from the 1994{endash}95 run. {ital W} charge asymmetry results from DO/ based on {approx_equal}6.5 {ital pb}{sup {minus}1} of data from the 1992{endash}93 run and {approx_equal}29.7 {ital pb}{sup {minus}1} of data from the 1994{endash}1995 run, using the W decays to muons, are also presented and are found to be consistent with CDF results. In addition, we present preliminary measurement of the Drell-Yan cross-section by CDF using a dielectron sample collected during the 1993{endash}94 run ({approx_equal}20 {ital pb}{sup {minus}1}) and a high mass dimuon sample from the combined 1993{endash}94 and 1994{endash}95 runs ({approx_equal}70 {ital pb}{sup {minus}1}). The measurement is in good agreement with predictions using the most recent parton density functions in a dilepton mass range between 11 and 350 GeV/{ital c}{sup 2}. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 284213
- Report Number(s):
- CONF-9505137-; ISSN 0094-243X; TRN: 96:020103
- Journal Information:
- AIP Conference Proceedings, Vol. 357, Issue 1; Conference: 10. topical workshop on proton-antiproton collider physics, Batavia, IL (United States), 9-13 May 1995; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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