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Title: Polarization Measurements of p and 3He Beams at RHIC and Future EIC Using the Polarized Atomic Hydrogen Gas Jet Target

Journal Article · · Universe

At the Relativistic Heavy Ion Collider (RHIC), the Polarized Atomic Hydrogen Gas Jet Target polarimeter (HJET) is employed for the precise measurement of the absolute transverse (vertical) polarization of proton beams, achieving low systematic uncertainties of approximately σ$$^{syst}_P$$/P≤0.5% . The acquired experimental data not only facilitated the determination of single AN(t) and double ANN(t) spin analyzing powers for 100 and 255 GeV proton beams, but also revealed a non-zero Pomeron spin-flip contribution through a Regge fit. Preliminary results obtained for forward inelastic pp and elastic pA analyzing powers will be discussed. The success of the HJET at RHIC suggests its potential application for proton beam polarimetry at the upcoming Electron–Ion Collider (EIC), aiming for an accuracy of 1%. Moreover, the provided analysis indicates that the RHIC HJET target can serve as a tool for the precision calibration, with the required accuracy, of the 3He beam polarization at the EIC.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
2311088
Report Number(s):
BNL-225318-2024-JAAM
Journal Information:
Universe, Vol. 10, Issue 1; ISSN 2218-1997
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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