Lambda polarization from unpolarized quark fragmentation

Abstract

The longstanding problem of explaining the observed polarization of Lambda hyperons inclusively produced in the high energy collisions of unpolarized hadrons is tackled by considering spin and k_T dependent quark fragmentation functions. The data on Lambda's and Lambda-bar's produced in p-N processes are used to determine simple phenomenological expressions for these new "polarizing fragmentation functions", which describe the experiments remarkably well.

LaTeX, 21+1 pages, 6 eps figures, uses epsfig.sty

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• Angular dependences in electroweak semi-inclusive leptoproduction
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Cited by in corpus (63)

• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Parton Fragmentation Functions
• Bounds on transverse momentum dependent distribution and fragmentation functions
• Parton intrinsic motion in inclusive particle production: unpolarized cross sections, single spin asymmetries and the Sivers effect
• Origin of single transverse-spin asymmetries in high-energy collisions
• Parton intrinsic motion: suppression of the Collins mechanism for transverse single spin asymmetries in p(transv. polarised) p --> pion + X
• Observation of Transverse $\Lambda /\bar{\Lambda }$ Hyperon Polarization in $e^{+}{e}^{-}$ Annihilation at Belle
• Transverse single spin asymmetries in Drell-Yan processes
• Polarization in Hadronic ΛHyperon Production and Chiral-Odd Twist-3 Distribution
• Polarized hadron pair production from electron-positron annihilation
• Photon polarization from helicity suppression in radiative decays of polarized Lambda_b to spin-3/2 baryons
• Extracting the Transverse Momentum Dependent Polarizing Fragmentation Functions
• Diffractive production of $\Lambda$ hyperons in the high-energy limit of strong interactions
• Evolution of transverse momentum dependent distribution and fragmentation functions
• Transverse spin effects in hard semi-inclusive collisions
• Transverse Lambda polarization in semi-inclusive DIS
• Extra Spin Asymmetries From the Breakdown of TMD-Factorization in Hadron-Hadron Collisions
• QCD evolution of naive-time-reversal-odd fragmentation functions
• First extraction of the $\Lambda$ polarising fragmentation function from Belle $e^{+}{e}^{-}$ data
• Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering and Drell-Yan Processes
• 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
• Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies
• Higher twist contribution to fragmentation function in inclusive hadron production in e^+e^- annihilation
• Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order
• Core meets corona: a two-component source to explain Lambda and anti-Lambda global polarization in semi-central heavy-ion collisions
• Momentum sum rules for fragmentation functions
• Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions
• Transverse $\Lambda$ Polarization in $e^{+}{e}^{-}$ collisions
• Spin asymmetries in jet-hyperon production at LHC
• Single-spin asymmetries in the leptoproduction of transversely polarized $\Lambda$ hyperons
• Polarized Hyperons from pA Scattering in the Gluon Saturation Regime
• General helicity formalism for two-hadron production in $e^{+}{e}^{-}$ annihilation within a TMD approach
• First global QCD analysis of the TMD ${\mathbf{g}}_{1\mathbf{T}}$ from semi-inclusive DIS data
• Transverse polarization of the $\Lambda$ hyperon from unpolarized quark fragmentation in the diquark model
• Low Energy Pion-Hyperon Interaction
• The saturation scale and its x-dependence from Lambda polarization studies
• 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
• Probing the transverse spin of quarks in deep inelastic scattering
• Transverse $\Lambda$ polarization in $e^{+}{e}^{-}$ processes within a TMD factorization approach and the polarizing fragmentation function
• Collins Effect in Single Spin Asymmetries of the $p^{\uparrow }p\to \pi X$ Process
• Collins and Sivers effects in p(transv. polarized) p --> jet pion X: Universality and process dependence
• Spin alignment of the high $p_T$ vector mesons in polarized pp collisions at high energies
• Strange quark-antiquark asymmetry of nucleon sea from $\Lambda /\bar{\Lambda }$ polarization
• Anomalous pion production induced by nontrivial topological structure of QCD vacuum
• Measuring c-quark polarization in W+c samples at ATLAS and CMS
• Spin alignment of vector mesons in unpolarized hadron-hadron collisions at high energies
• $\sin ({\varphi }_{\Lambda }-{\varphi }_S)$ azimuthal asymmetry in transversely polarized $\Lambda$ production in SIDIS within TMD factorization at EIC
• Double Collins effect in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }X$ process in a diquark spectator model
• Predicting the $\sin {\varphi }_S$ Single-Spin-Asymmetry of $\Lambda$ Production off transversely polarized nucleon in SIDIS
• Kinked tracks from ${\Sigma }^{+}$ baryons as a probe of light quark polarizations
• Spin physics with antiprotons
• Mechanism of single-spin asymmetries generation in the inclusive hadron processes
• Transverse ${\Lambda }^0$ polarization in inclusive quasi-real photoproduction at the current fragmentation
• Measurement of transverse $\Lambda$ and $\bar{\Lambda }$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Transverse Lambda polarization in inclusive processes
• Single spin asymmetries in QCD
• Investigating the transverse momentum dependent gluon Sivers function in quarkonium production at $pp$ colliders
• Hyperon polarization in e^-p --> e^-HK with polarized electron beams
• Two-component source to explain $\Lambda$ and $\bar{\Lambda }$ global polarization in non-central heavy-ion collisions
• Anti-hyperon Polarization in $pA$ and ${\Sigma }^{-}A$ Collisions and Intrinsic Antidiquark State in Incident Baryon
• Measurement of transverse polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons inside jets in $pp$ collisions at $\sqrt{s}=200$ GeV
• Test of the Universality of Naive-time-reversal-odd Fragmentation Functions