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Title: Spin asymmetries for vector boson production in polarized p + p collisions

Journal Article · · Physical Review. D.
 [1];  [2];  [2];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We study the cross section for vector boson (W±/Z0$$\star$$) production in polarized nucleon-nucleon collisions for low transverse momentum of the observed vector boson. For the case where one measures the transverse momentum and azimuthal angle of the vector bosons, we present the cross sections and the associated spin asymmetries in terms of transverse momentum dependent parton distribution functions (TMDs) at tree level within the TMD factorization formalism. To assess the feasibility of experimental measurements, we estimate the spin asymmetries forW±/Z0 boson production in polarized proton-proton collisions at the Relativistic Heavy Ion Collider by using current knowledge of the relevant TMDs. Here, we find that some of these asymmetries can be sizable if the suppression effect from TMD evolution is not too strong. The W program at RHIC can, thus, test and constrain spin theory by providing unique information on the universality properties of TMDs, TMD evolution, and the nucleon structure. For example, the single transverse spin asymmetries could be used to probe the well-known Sivers function f$$⊥q\atop{1T}$$, as well as the transversal helicity distribution g$$q\atop{1T}$$ via the parity-violating nature of W production.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
SC0012704; AC52-06NA25396
OSTI ID:
1354638
Alternate ID(s):
OSTI ID: 1236406
Report Number(s):
BNL-113781-2017-JA; PRVDAQ
Journal Information:
Physical Review. D., Vol. 93, Issue 1; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Sivers distribution functions of sea quarks in a proton with the chiral Lagrangian journal October 2019

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