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Title: Measurements of the $$Z$$0/$$γ$$* cross section and transverse single spin asymmetry in 510 GeV $$p$$ + $$p$$ collisions

Journal Article · · Physics Letters. B
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  1. American Univ. in Cairo, New Cairo (Egypt); The STAR Collaboration. et al

The differential cross section for Z0 production, measured as a function of the boson’s transverse momentum (pT), provides important constraints on the evolution of the transverse momentum dependent parton distribution functions (TMDs). The transverse single spin asymmetry (TSSA) of the Z0 is sensitive to one of the polarized TMDs, the Sivers function, which is predicted to have the opposite sign in p + p → W/Z + X from that which enters in semi-inclusive deep inelastic scattering. In this Letter, the STAR Collaboration reports the first measurement of the Z0/γ* differential cross section as a function of its pT in p+p collisions at a center-of-mass energy of 510 GeV, together with the Z0/γ* total cross section. We also report the measurement of Z0/γ* TSSA in transversely polarized p+p collisions at 510 GeV.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
The STAR Collaboration
Grant/Contract Number:
SC0012704
OSTI ID:
2367447
Report Number(s):
BNL--225625-2024-JAAM
Journal Information:
Physics Letters. B, Journal Name: Physics Letters. B Vol. 854; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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