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The STAR Collaboration reports measurements of the transverse single-spinasymmetries, $A_N$, for inclusive jets and identified `hadrons within jets'production at midrapidity from transversely polarized $pp$ collisions at$\sqrt{s}$ = 200 GeV, based on data recorded in 2012 and 2015. The inclusivejet asymmetry measurements include $A_N$ for inclusive jets and $A_N$ for jetscontaining a charged pion carrying a momentum fraction $z>0.3$ of the jetmomentum. The identified hadron within jet asymmetry measurements include theCollins effect for charged pions, kaons and protons, and the Collins-likeeffect for charged pions. The measured asymmetries are determined for severaldistinct kinematic regions, characterized by the jet transverse momentum$p_{T}$ and pseudorapidity $\eta$, as well as the hadron momentum fraction $z$and momentum transverse to the jet axis $j_{T}$. These results probe highermomentum scales ($Q^{2}$ up to $\sim$\,900 GeV$^{2}$) than current,semi-inclusive deep inelastic scattering measurements, and they provide newconstraints on quark transversity in the proton and enable tests of evolution,universality and factorization breaking in the transverse-momentum-dependentformalism.

physical review. d/physical review. d.

Azimuthal transverse single-spin asymmetries of inclusive jets and  identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ =  200 GeV