Spin asymmetries in jet-hyperon production at LHC

Abstract

We consider polarized Lambda hyperon production in proton-proton scattering, p p -> (Λ^\uparrow jet) jet X, in the kinematical region of the LHC experiments, in particular the ALICE experiment. We present a new Lambda polarization observable that arises from the Sivers effect in the fragmentation process. It can be large even at midrapidity and therefore, is of interest for high energy hadron collider experiments. Apart from its potential to shed light on the mechanisms behind the phenomenon of Lambda polarization arising in unpolarized hadronic collisions, the new observable in principle also allows to test the possible color flow dependence of single spin asymmetries and the (non)universality of transverse momentum dependent fragmentation functions.

11 pages, 10 eps figures; minor modifications, conclusions unchanged, version to be published

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Cited by in corpus (17)

• Partonic Pole Matrix Elements for Fragmentation
• Spectral analysis of gluonic pole matrix elements for fragmentation
• Polarized jet fragmentation functions
• Extra Spin Asymmetries From the Breakdown of TMD-Factorization in Hadron-Hadron Collisions
• Measurement of the transverse polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons produced in proton-proton collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
• TMDs and SSAs in hadronic interactions
• Transverse polarization of the $\Lambda$ hyperon from unpolarized quark fragmentation in the diquark model
• The saturation scale and its x-dependence from Lambda polarization studies
• Non-collinearity in high energy processes
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• Test of the Universality of Naive-time-reversal-odd Fragmentation Functions
• Measurement of transverse polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons inside jets in $pp$ collisions at $\sqrt{s}=200$ GeV
• Collins asymmetries for pion-in-jet production in polarized $\ell p$ collisions at the EIC