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Title: Single spin asymmetries of inclusive hadrons produced in electron scattering from a transversely polarized 3 He target

We report the first measurement of target single-spin asymmetries (AN) in the inclusive hadron production reaction, e + 3He↑→h+X, using a transversely polarized 3 He target. This experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons (π±, K± and proton) were detected in the transverse hadron momentum range 0.54 < pT < 0.74 GeV/c. The range of xF for pions was -0.29 < xF< -0.23 and for kaons -0.25 < xF<-0.18. The observed asymmetry strongly depends on the type of hadron. A positive asymmetry is observed for π+ and K+. A negative asymmetry is observed for π–. The magnitudes of the asymmetries follow |Aπ |<|Aπ +|<|AK +|. The K and proton asymmetries are consistent with zero within the experimental uncertainties. The π+ and π asymmetries measured for the 3He target and extracted for neutrons are opposite in sign with a small increase observed as a function of pT.
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Publication Date:
OSTI Identifier:
1127121
Report Number(s):
JLAB-PHY-13--1826; DOE/OR/23177--2907; arXiv:1311.1866
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1601146
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 89; Journal Issue: 4; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
Jefferson Lab Hall A Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS