Transverse spin transfer, D_TT, of Lambda and anti-Lambda  in Transversely Polarized pp Collisions at 200 GeV in run 2015.

2015 Preliminary Results, request during the STAR Collaboration Meeting March 3nd 2021.

Slides of Collaboration meeting: CollabMeeting_xuyike_20210303.pdf

(Note: the anti-Lambda results shown in Collaboration Meeting used the positive decay parameter, 0.732. Now it is corrected to the negative, -0.732 )


D_TT extracted from the trigger combined sample for Lambda and anti-Lambda. The upper graph is with positive eta with respect to the polarized beam and the lower one is with negative eta with respect to the polarized beam. The alpha of Lambda(anti_Lambda) used is 0.732(-0.732).

D_TT extracted from 2012 data sample (open markers) and 2015 data sample (solid markers) for Λ and Λ with positive eta.



The analysis note is in: D_TT_run2015_AnalysisNote.pdf