We report precision measurements of the Feynman-x dependence, and first measurements of the transverse momentum dependence, of transverse single spin asymmetries for the production of \pi^0 mesons from polarized proton collisions at \sqrt{s}=200 GeV. The x_F dependence of the results are in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p_T dependence at fixed x_F are not consistent with pQCD-based calculations.
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Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV. HEPData (collection).
https://doi.org/10.17182/hepdata.97117
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STAR
Collaboration
(2020).
Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.97117.v1
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STAR
Collaboration
(2020).
“Table for Figure 2 < eta > =3.7 and x_F > 0.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t1
STAR
Collaboration
(2020).
“Table for Figure 2 < eta > =3.3 and x_F > 0.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t2
STAR
Collaboration
(2020).
“Table for Figure 2 < eta > =3.7 and x_F < 0.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t3
STAR
Collaboration
(2020).
“Table for Figure 2 < eta > =3.3 and x_F < 0.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t4
STAR
Collaboration
(2020).
“Table for Figure 3 x_F > 0.4.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t5
STAR
Collaboration
(2020).
“Table for Figure 3 x_F < -0.4.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t6
STAR
Collaboration
(2020).
“Table for Figure 4 0.25 < x_F < 0.30.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t7
STAR
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(2020).
“Table for Figure 4 0.30 < x_F < 0.35.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t8
STAR
Collaboration
(2020).
“Table for Figure 4 0.35 < x_F < 0.40.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t9
STAR
Collaboration
(2020).
“Table for Figure 4 0.40 < x_F < 0.47.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t10
STAR
Collaboration
(2020).
“Table for Figure 4 0.47 < x_F < 0.56.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t11
STAR
Collaboration
(2020).
“Table for Figure 4 0.56 < x_F < 0.80.” of “Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.97117.v1/t12
When using this data, please cite the original publication:
STAR
Collaboration
(2008).
Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV. Phys.Rev.Lett. 101 (2008) 222001.
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