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Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV

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成果类型:
期刊论文
作者:
Adam, J.*;Adamczyk, L.;Adams, J. R.;Adkins, J. K.;Agakishiev, G.;...
通讯作者:
Adam, J.
作者机构:
[Adam, J.; Cherney, M.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Drachenberg, J. L.] Abilene Christian Univ, Abilene, TX 79699 USA.
[Sikora, R.; Fulek, L.; Przybycien, M.; Adamczyk, L.] AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland.
[Svirida, D. N.; Bordyuzhin, I. G.; Alekseev, I.] Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia.
[Underwood, D. G.; Krueger, K.; Spinka, H. M.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
通讯机构:
[Adam, J.] C
Creighton Univ, Omaha, NE 68178 USA.
语种:
英文
期刊:
PHYSICAL REVIEW D
ISSN:
2470-0010
年:
2018
卷:
98
期:
11
基金类别:
BNL; NERSC Center at LBNL; Open Science Grid consortium; Office of Nuclear Physics within the U.S. DOE Office of Science; U.S. National Science FoundationNational Science Foundation (NSF); Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC); Chinese Academy of ScienceChinese Academy of Sciences; Ministry of Science and Technology of ChinaMinistry of Science and Technology, China; Chinese Ministry of EducationMinistry of Education, China; National Research Foundation of KoreaNational Research Foundation of Korea; Czech Science FoundationGrant Agency of the Czech Republic; Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic; Department of Atomic Energy of the Government of IndiaDepartment of Atomic Energy (DAE); Department of Science and Technology of the Government of IndiaDepartment of Science & Technology (India); National Science Centre of PolandNational Science Center, PolandNational Science Centre, Poland; Ministry of Science, Education and Sports of the Republic of CroatiaMinistry of Science, Education and Sports, Republic of Croatia; RosAtom of Russia; German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF)Federal Ministry of Education & Research (BMBF); Helmholtz AssociationHelmholtz Association
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摘要:
The longitudinal spin transfer D-LL to Lambda and (Lambda) over bar hyperons produced in high-energy polarized proton-proton collisions is expected to be sensitive to the helicity distribution functions of strange quarks and antiquarks of the proton, and to longitudinally polarized fragmentation functions. We report an improved measurement of D-LL from data obtained at a center-of-mass energy of root s = 200 GeV with the STAR detector at RHIC. The data have an approximately twelve times larger figure of merit than prior results and cover vertical bar eta vertical bar

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