Cross section and longitudinal single-spin asymmetry AL for forward W± → μ±ν production in polarized p+p collisions at √s=510 GeV

Date
2018-08-01
Authors
Adare, A.
Apadula, Nicole
Campbell, Sarah
Ding, Lei
Hill, John
Hotvedt, Nels
Lajoie, John
Lebedev, Alexandre
Lee, S. H.
Ogilvie, Craig
Patel, Milap
Perry, Joshua
Rinn, Timothy
Rosati, Marzia
Runchey, Jonathan
Sen, Abhisek
Shaver, Alex
Shimomura, M.
Timilsina, Arbin
Whitaker, Shawn
et al.
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Abstract

We have measured the cross section and single-spin asymmetries from forward W±→μ±ν production in longitudinally polarized p+p collisions at √s=510  GeV using the PHENIX detector at the Relativistic Heavy Ion Collider. The cross sections are consistent with previous measurements at this collision energy, while the most forward and backward longitudinal single spin asymmetries provide new insights into the sea quark helicities in the proton. The charge of the W bosons provides a natural flavor separation of the participating partons.

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This article is published as Adare, A., C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred et al. "Cross section and longitudinal single-spin asymmetry AL for forward W±→ μ±ν production in polarized p+p collisions at s= 510 GeV." Physical Review D 98, no. 3 (2018): 032007. DOI: 10.1103/PhysRevD.98.032007. Posted with permission.

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