Large parity violating longitudinal single-spin asymmetries $A^{e^+}_L$ = $-0.86^{+0.30}_{-0.14}$ and $A^{e^-}_L$ = $0.88^{+0.12}_{-0.71}$ are observed for inclusive high transverse momentum electrons and positrons in polarized $p + p$ collisions at a center of mass energy of $\sqrt{s}$ = 500 GeV with the PHENIX detector at RHIC. These $e^{\pm}$ come mainly from the decay of $W^{\pm}$ and $Z^0$ bosons, and their asymmetries directly demonstrate parity violation in the couplings of the $W^{\pm}$ to the light quarks. The observed electron and positron yields were used to estimate $W^{\pm}$ boson production cross sections for the $e^{\pm}$ channels of $\sigma$ $(pp \rightarrow W^+ X) \times BR(W^+ \rightarrow e^+\nu_e) = 144.1 \pm 21.2$(stat)$^{+3.4}_{-10.3}$(syst)$\pm 15\%(norm)$ pb, and $\sigma (pp \rightarrow W^- X) \times BR(W^- \rightarrow e^- \bar{\nu}_e)$ = 31.7 $\pm$12.1(stat)$^{+10.1}_{-8.2}$(syst) $\pm$ 15%(norm) pb.
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PHENIX
Collaboration
(2011).
Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV. Phys.Rev.Lett. 106 (2011) 062001.
Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV. HEPData (collection).
https://doi.org/10.17182/hepdata.143617
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PHENIX
Collaboration
(2023).
Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.143617.v1
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PHENIX
Collaboration
(2023).
“Figure 1” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143617.v1/t1
PHENIX
Collaboration
(2023).
“Figure 2a” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143617.v1/t2
PHENIX
Collaboration
(2023).
“Figure 2b” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143617.v1/t3
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PHENIX
Collaboration
(2023).
“thumb_fig1.png” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143617.v1/r1
PHENIX
Collaboration
(2023).
“thumb_fig2.png” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143617.v1/r2
PHENIX
Collaboration
(2023).
“thumb_fig3.png” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143617.v1/r3
PHENIX
Collaboration
(2023).
“thumb_fig4.png” of “Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143617.v1/r4
When using this data, please cite the original publication:
PHENIX
Collaboration
(2011).
Cross Section and Parity Violating Spin Asymmetries of $W^\pm$ Boson Production in Polarized $p+p$ Collisions at $\sqrt{s}=500$ GeV. Phys.Rev.Lett. 106 (2011) 062001.
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