Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions

Abstract

It has been known for a long time that hyperons produced in hadronic collisions are polarized perpendicular to the production plane of the reaction. This effect cannot be described by using twist-2 collinear parton correlators only. Here we compute the contribution of twist-3 fragmentation functions to the production of transversely polarized hyperons in unpolarized proton-proton collisions in the framework of collinear factorization. By taking into account the relations among the relevant twist-3 fragmentation functions which follow from the QCD equation of motion and the Lorentz invariance property of the correlators, we present the leading-order cross section for this term.

9 pages, 6 figures

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Cited by in corpus (15)

• Extracting the Transverse Momentum Dependent Polarizing Fragmentation Functions
• Transverse spin effects in hard semi-inclusive collisions
• Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order
• Exact Relations for Twist-3 Gluon Distribution and Fragmentation Functions from Operator Identities
• The transverse polarization of $\Lambda$ hyperons in $e^{+}{e}^{-}\to {\Lambda }^{\uparrow }hX$ processes within TMD factorization
• The Polarising Fragmentation Function and the Lambda polarisation in e+ e- processes
• Twist-3 Gluon Fragmentation Contribution to Polarized Hyperon Production in Unpolarized Proton-Proton Collision
• Transverse Polarization of Hyperons Produced in Semi-Inclusive Deep Inelastic Scattering
• $\sin ({\varphi }_{\Lambda }-{\varphi }_S)$ azimuthal asymmetry in transversely polarized $\Lambda$ production in SIDIS within TMD factorization at EIC
• Predicting the $\sin {\varphi }_S$ Single-Spin-Asymmetry of $\Lambda$ Production off transversely polarized nucleon in SIDIS
• Measurement of transverse $\Lambda$ and $\bar{\Lambda }$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Novel relations for twist-3 tensor-polarized fragmentation functions in spin-1 hadrons
• Investigating the transverse momentum dependent gluon Sivers function in quarkonium production at $pp$ colliders
• Twist-3 Gluon Fragmentation Contribution to Hyperon Polarization in Semi-Inclusive Deep Inelastic Scattering
• Measurement of transverse polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons inside jets in $pp$ collisions at $\sqrt{s}=200$ GeV