Transverse spin transfer to Λ and Λbar hyperons in polarized proton-proton collisions at sqrt(s) = 200 GeV

Authors

Adam Gibson, Valparaiso University
Shirvel Stanislaus, Valparaiso University
Donald Koetke, Valparaiso University
STAR Collaboration

Document Type

Article

Publication Date

2018

Journal Title

Physical Review D

Volume

98

Abstract

The transverse spin transfer from polarized protons to Λ and Λ¯hyperons is expected to provide sensitivity to the transversity distribution of the nucleon and to the transversely polarized fragmentation functions. We report the first measurement of the transverse spin transfer to Λ and Λ¯ along the polarization direction of the fragmenting quark, DTT, in transversely polarized proton-proton collisions at s√=200GeV with the STAR detector at RHIC. The data correspond to an integrated luminosity of 18pb−1 and cover the pseudorapidity range |η|<1.2and transverse momenta pT up to 8GeV/c. The dependence on pTand η are presented. The DTT results are found to be comparable with a model prediction, and are also consistent with zero within uncertainties.

Recommended Citation

Gibson, Adam; Stanislaus, Shirvel; Koetke, Donald; and STAR Collaboration, "Transverse spin transfer to Λ and Λbar hyperons in polarized proton-proton collisions at sqrt(s) = 200 GeV" (2018). Physics and Astronomy Faculty Publications. 179.
https://scholar.valpo.edu/phys_astro_fac_pub/179