"Table II" of "Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at sqrt(s)=62.4 GeV"
メタデータ
- 公開日
- 2023-01-01
- DOI
-
- 10.17182/hepdata.142989.v1/t2
- 10.17182/hepdata.142989.v1/t4
- 10.17182/hepdata.142989.v1/t5
- 10.17182/hepdata.142989.v1/t1
- 10.17182/hepdata.142989.v1/t3
- 公開者
- HEPData
- データ作成者 (e-Rad)
-
- PHENIX Collaboration
説明
Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from $p$ + $p$ collisions at $\sqrt{s}$ = 62.4 GeV GeV are presented. The PHENIX measurement of the cross sections for 1.0 < $p_T$ < 4.5 GeV/$c$ are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, $\alpha_s$. Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 $\lesssim$ $x_{gluon}$ $\lesssim$ 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.
Fit-function parameters for relative fractions of different species in the hadron mix.