Transverse polarization of the $\Lambda$ hyperon from unpolarized quark fragmentation in the diquark model

Abstract

We investigate the spin-dependent (naive) T-odd fragmentation function $D_{1T}^{\perp }$, which can provide an explanation on the transverse polarization of the ${\Lambda }^0$ hyperon produced in an unpolarized process. We calculate $D_{1T}^{\perp }$ for light flavors in the spectator diquark model, with a Gaussian form factor at the hyperon-quark-diquark vertex. We include in the calculation both the scalar diquark and axial-vector diquark spectators. We determine the values of the model parameters by fitting the unpolarized fragmentation function $D_1^{\Lambda }$ to the DSV parametrization for $D_1^{\Lambda }$. In addition, we compute the longitudinal polarization fragmentation function $G_1^{\Lambda }$ and compare it with the known parametrization of $G_1^{\Lambda }$. We also estimate the transverse polarizations of $\Lambda$ production, in both semi-inclusive deep inelastic scattering and single inclusive $e^{+}{e}^{-}$ annihilation.

arXiv commentReference added, typos corrected

References in corpus (37)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• The complete tree-level result up to order $1/Q$ for polarized deep-inelastic leptoproduction
• Semi-inclusive deep inelastic scattering at small transverse momentum
• Transverse Polarisation of Quarks in Hadrons
• Single-spin asymmetries: the Trento conventions
• Universality of soft and collinear factors in hard-scattering factorization
• Initial-State Interactions and Single-Spin Asymmetries in Drell-Yan Processes
• Transverse-momentum distributions in a diquark spectator model
• Modelling quark distribution and fragmentation functions
• QCD Analysis of Unpolarized and Polarized Lambda - Baryon Production in Leading and Next-to-Leading Order
• Asymmetries in polarized hadron production in e^+e^- annihilation up to order 1/Q
• Bounds on transverse momentum dependent distribution and fragmentation functions
• Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
• Gluon-Exchange in Spin-Dependent Fragmentation
• Polarized $q\to \Lambda$ Fragmentation Functions from $e^{+}{e}^{-}\to \Lambda +X^{\ast }$
• Polarized Lambdas in the Current Fragmentation Region
• Lambda polarization from unpolarized quark fragmentation
• Collins fragmentation function for pions and kaons in a spectator model
• Pion TMDs in light-front constituent approach, and Boer-Mulders effect in the pion-induced Drell-Yan process
• Partonic Pole Matrix Elements for Fragmentation
• Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
• Reviewing model calculations of the Collins fragmentation function
• Spectral analysis of gluonic pole matrix elements for fragmentation
• Octet-Baryon Form Factors in the Diquark Model
• Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models
• A mechanism for the T-odd pion fragmentation function
• Transverse Lambda polarization in semi-inclusive DIS
• Quark fragmentation functions in a diquark model for proton and $\Lambda$ hyperon production
• Helicity and Transversity Distribution of Nucleon and $\Lambda$-Hyperon from $\Lambda$ Fragmentation
• Strangeness Production in Deep-Inelastic Positron-Proton Scattering at HERA
• Spin asymmetries in jet-hyperon production at LHC
• Single-spin asymmetries in the leptoproduction of transversely polarized $\Lambda$ hyperons
• Boer-Mulders function of pion meson and $q_T$-weighted $\cos 2\varphi$ asymmetry in the unpolarized ${\pi }^{-}p$ Drell-Yan at COMPASS
• Polarized Lambda hyperon production in Semi-inclusive deep inelastic scattering off an unpolarized nulceon target
• Twist-3 fragmentation functions in a spectator model with gluon rescattering
• Observation of Transverse $\Lambda /\bar{\Lambda }$ Hyperon Polarization in $e^{+}{e}^{-}$ Annihilation at Belle

Cited by in corpus (9)

• Core meets corona: a two-component source to explain Lambda and anti-Lambda global polarization in semi-central heavy-ion collisions
• Isospin Symmetry of Fragmentation Functions
• Several Topics on Transverse Momentum-Dependent Fragmentation Functions
• The transverse polarization of $\Lambda$ hyperons in $e^{+}{e}^{-}\to {\Lambda }^{\uparrow }hX$ processes within TMD factorization
• Double Collins effect in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }X$ process in a diquark spectator model
• Stringent test of $CP$ symmetry in ${\Sigma }^{+}$ hyperon decays
• $\sin ({\varphi }_{\Lambda }-{\varphi }_S)$ 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
• Transverse spin polarization as a novel probe of medium-induced transverse-momentum-broadening effect