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Volumn 56, Issue 3, 1997, Pages 1391-1406

Production of charm mesons at high transverse momentum in 515 GeV/[Formula presented] [Formula presented]-nucleon collisions

(52)  Apanasevich, L d   Bacigalupi, J a   Baker, W c   Begel, M i   Blusk, S h   Bromberg, C d   Chang, P e   Choudhary, B b   Chung, W H h   de Barbaro, L i   DeSoi, W i   Dlugosz W e   Dunlea, J i   Engels, E h   Fanourakis, G i   Ferbel, T i   Ftacnik, J i   Garelick, D e   Ginther, G i   Glaubman, M e   more..


Author keywords

[No Author keywords available]

Indexed keywords


EID: 0009188922     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.56.1391     Document Type: Article
Times cited : (15)

References (55)
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    • The shapes of the calculated (Formula presented) spectra are not entirely independent of the choices of the input parameters of the calculation. For illustrations of the sensitivity to the choice of PDF and/or the renormalization scale formulation, see Ref. 17
    • The shapes of the calculated (Formula presented) spectra are not entirely independent of the choices of the input parameters of the calculation. For illustrations of the sensitivity to the choice of PDF and/or the renormalization scale formulation, see Ref. 17.
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    • Similar but distinct symbols have been adopted for the supplemental intrinsic transverse momentum associated with the NLO PQCD calculation and for the PYTHIA intrinsic transverse momentum parameter to emphasize that while the concept is similar in the two situations, the particular values of the parameter might be expected to differ due to the differing levels of contributions already incorporated in the calculations.
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    • This diagram does not include the veto walls and steel absorber, which were located upstream of the detector elements shown. The diagram also excludes the downstream muon identification system, which was located downstream of the detector elements shown, and which was used primarily by Fermilab E672 to select events containing high mass dimuons.
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    • Scintillation counter veto walls surrounding a large steel absorber located at the front end of the Meson West spectrometer tagged muons that were produced upstream of the experimental hall
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    • Note that both the SINGLE LOCAL HI trigger and the LOCAL (Formula presented)GLOBAL HI trigger are sensitive to high (Formula presented) direct photons or photons from high (Formula presented) (Formula presented) decays, but the LOCAL(Formula presented)GLOBAL HI trigger exhibits greater sensitivity to high (Formula presented) mesons that decay into more widely separated photons, such as (Formula presented) or (Formula presented)
    • Note that both the SINGLE LOCAL HI trigger and the LOCAL (Formula presented)GLOBAL HI trigger are sensitive to high (Formula presented) direct photons or photons from high (Formula presented) (Formula presented) decays, but the LOCAL(Formula presented)GLOBAL HI trigger exhibits greater sensitivity to high (Formula presented) mesons that decay into more widely separated photons, such as (Formula presented) or (Formula presented).
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    • Corrections were applied to the measured (Formula presented), and (Formula presented) to account for the location of the center of curvature of the path of the charged particles, the change in (Formula presented) and for the effects of the fringe field of the analysis magnet.
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    • This particular PYTHIA parameter is stored in the array element PARP(81), and it was reduced from 1.3 GeV to 0.7 GeV. See the PYTHIA reference manual for additional details 40.
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    • The (Formula presented) determined from the (Formula presented) mesons in this data sample was (Formula presented). See Ref. 39 for details.
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    • The two contributions to the uncertainties in the numbers of (Formula presented) mesons quoted in Tables I and II are treated as uncorrelated statistical uncertainties in the differential cross section analyses. The two contributions to the uncertainties associated with each of the efficiencies are treated as uncorrelated systematic uncertainties in the differential cross section analyses
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    • The normalization of these NLO PQCD calculations has been increased by a factor of (Formula presented)4.6 so that the resulting integrated cross sections correspond to our measured value
    • The normalization of these NLO PQCD calculations has been increased by a factor of (Formula presented)4.6 so that the resulting integrated cross sections correspond to our measured value.
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    • The factor of 1.6 is from a NLO PQCD calculation, and therefore does not account for the leading particle effect which results in enhanced forward production of charm hadrons whose light quarks are spectator valence quarks from the incoming beam particles
    • The factor of 1.6 is from a NLO PQCD calculation, and therefore does not account for the leading particle effect which results in enhanced forward production of charm hadrons whose light quarks are spectator valence quarks from the incoming beam particles.


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