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Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV

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Academic year: 2021

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FIG. 1: Invariant mass distributions in the vicinity of the η peak for the high-p T triggered data set and for three different bins of p T
FIG. 2: Cross section for midrapidity inclusive η production at √
TABLE II: Results, statistical, and systematic (type-B 1 , type-B 2 ) uncertainties of the measured η to π 0 cross section ratio from the 2006 data set.
FIG. 5: Double helicity asymmetry for midrapidity inclu- inclu-sive η production from the combined 2005 and 2006 data at √ s = 200 GeV as a function of p T

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