Collins function for pion-in-jet production in polarized $pp$ collisions: a test of universality and factorization

Abstract

We present an updated study of the Collins azimuthal asymmetries for pion-in-jet production in polarized $pp$ collisions. To this aim, we employ a recent extraction of the transversity and Collins fragmentation functions from semi-inclusive deep inelastic scattering and $e^{+}{e}^{-}$ annihilation into hadron pairs processes, obtained within a simplified transverse momentum dependent (TMD) approach at leading order in the strong coupling constant ${\alpha }_s$. In the present case we adopt a collinear configuration for the initial state, keeping transverse momentum effects only in the fragmentation mechanism. Our theoretical estimates, when compared against 200~GeV and 510~GeV data from the STAR Collaboration, show a generally good agreement for the distributions in the transverse momentum of the jet, the pion longitudinal momentum fraction and its transverse momentum with respect to the jet direction. While not being a proof, due the assumptions and limitations behind the entire approach, these findings corroborate the hypothesis of TMD factorization for such processes as well as of the universality of the Collins function and, once again, of a reduced impact of the proper TMD evolution on azimuthal asymmetries. We will also present predictions based on an extraction of the Collins and transversity distributions where information from data on single spin asymmetry for inclusive pion production in $p^{\uparrow }p$ collisions is included through a Bayesian reweighting procedure.

10 pages, 7 figures. Few comments modified and a reference added. Matches published version

References in corpus (50)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Time-reversal odd distribution functions in leptoproduction
• Semi-inclusive deep inelastic scattering at small transverse momentum
• QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum
• Universality of T-odd effects in single spin and azimuthal asymmetries
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• Universality of soft and collinear factors in hard-scattering factorization
• Physics Opportunities with the 12 GeV Upgrade at Jefferson Lab
• Initial-State Interactions and Single-Spin Asymmetries in Drell-Yan Processes
• Transversity and Collins functions from SIDIS and e+e- data
• A Higher Order Perturbative Parton Evolution Toolkit (HOPPET)
• Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering
• Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
• Parton-to-Pion Fragmentation Reloaded
• New Quark Distributions and Semi-Inclusive Electroproduction on Polarized Nucleons
• Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3$He Target
• A Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes
• Soft and Collinear Factorization and Transverse Momentum Dependent Parton Distribution Functions
• Intrinsic transverse momentum and the polarized Drell-Yan process
• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at \sqrt{s} = 10.58 GeV
• Asymmetries in polarized hadron production in e^+e^- annihilation up to order 1/Q
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Dilepton production from polarized hadron hadron collisions
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries
• Parton intrinsic motion in inclusive particle production: unpolarized cross sections, single spin asymmetries and the Sivers effect
• Unpolarised Transverse Momentum Dependent Distribution and Fragmentation Functions from SIDIS Multiplicities
• Parton-to-Kaon Fragmentation Revisited
• Collins Fragmentation and the Single Transverse Spin Asymmetry
• Gluon-Exchange in Spin-Dependent Fragmentation
• Measurement of Collins asymmetries in inclusive production of charged pion pairs in e^+e^- annihilation at BABAR
• General partonic structure for hadronic spin asymmetries
• Collins functions for pions from SIDIS and new e+e- data: a first glance at their transverse momentum dependence
• Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
• Collins azimuthal asymmetries of hadron production inside jets
• The transverse momentum distribution of hadrons within jets
• Probing the gluon Sivers function in $p^{\uparrow }p\to J/\psi X$ and $p^{\uparrow }p\to DX$
• Measurement of azimuthal asymmetries in inclusive charged dipion production in $e^{+}{e}^{-}$ annihilations at $\sqrt{s}$ = 3.65 GeV
• Process dependent Sivers function and implications for single spin asymmetry in inclusive hadron production
• Unraveling the Gluon Sivers Function in Hadronic Collisions at RHIC
• Polarized hadron pair production from electron-positron annihilation
• Polarized jet fragmentation functions
• Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions
• Updated QCD global analysis of single transverse-spin asymmetries I: Extracting $\tilde{H}$, and the role of the Soffer bound and lattice QCD
• Testing the process dependence of the Sivers function via hadron distributions inside a jet
• Testing the universality of the Collins function in pion-jet production at RHIC
• Probing transverse quark polarization in deep-inelastic leptoproduction
• Spin asymmetries in jet-hyperon production at LHC
• Probing Transverse Momentum Dependent Structures with Azimuthal Dependence of Energy Correlators
• Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV

Cited by in corpus (1)

• Collins asymmetries for pion-in-jet production in polarized $\ell p$ collisions at the EIC