TY - JOUR
T1 - Transverse Λ polarization in unpolarized pp → jet Λ↑ X
AU - D'Alesio, Umberto
AU - Gamberg, Leonard
AU - Murgia, Francesco
AU - Zaccheddu, Marco
N1 - Publisher Copyright:
© 2024 The Author(s)
PY - 2024/4
Y1 - 2024/4
N2 - In this Letter, we investigate the spontaneous transverse polarization of Λ hyperons produced in unpolarized pp collisions inside a jet, by adopting a TMD approach where transverse momentum effects are included only in the fragmentation process. We will present predictions based on the parametrizations of the Λ polarizing fragmentation function as extracted from fits to Belle e+e− data. These estimates will be compared against preliminary STAR data. We will then be able to explore the universality properties of the quark polarizing fragmentation function and, for the first time, the role of its gluon counterpart.
AB - In this Letter, we investigate the spontaneous transverse polarization of Λ hyperons produced in unpolarized pp collisions inside a jet, by adopting a TMD approach where transverse momentum effects are included only in the fragmentation process. We will present predictions based on the parametrizations of the Λ polarizing fragmentation function as extracted from fits to Belle e+e− data. These estimates will be compared against preliminary STAR data. We will then be able to explore the universality properties of the quark polarizing fragmentation function and, for the first time, the role of its gluon counterpart.
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U2 - 10.1016/j.physletb.2024.138552
DO - 10.1016/j.physletb.2024.138552
M3 - Article
AN - SCOPUS:85188178715
SN - 0370-2693
VL - 851
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 138552
ER -