Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at Belle

Abstract

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods we observe statistically significant azimuthal asymmetries for charged pion pairs in e+e- annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 million hadronic events collected with the Belle detector.

6 pages, 4 figures

References in corpus (9)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
• Single-spin asymmetries: the Trento conventions
• First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-Inclusive Deep Inelastic Scattering
• Asymmetries in polarized hadron production in e^+e^- annihilation up to order 1/Q
• Reviewing model calculations of the Collins fragmentation function
• Estimate of the Collins fragmentation function in a chiral invariant approach
• A mechanism for the T-odd pion fragmentation function
• Study of T-odd Quark Fragmentation Function in $Z^0\to 2$-jet Decay

Cited by in corpus (136)

• Semi-inclusive deep inelastic scattering at small transverse momentum
• The Physics of the B Factories
• Transversity and Collins functions from SIDIS and e+e- data
• Probing Novel Scalar and Tensor Interactions from (Ultra)Cold Neutrons to the LHC
• Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
• A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
• Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3$He Target
• Extraction of Quark Transversity Distribution and Collins Fragmentation Functions with QCD Evolution
• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
• Parton Fragmentation Functions
• Update on transversity and Collins functions from SIDIS and e+ e- data
• Effects of transversity in deep-inelastic scattering by polarized protons
• A guide to light-cone PDFs from Lattice QCD: an overview of approaches, techniques and results
• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at \sqrt{s} = 10.58 GeV
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Measurement of the Collins and Sivers asymmetries on transversely polarised protons
• Hadron structure from lattice quantum chromodynamics
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries
• Understanding the large-distance behavior of transverse-momentum-dependent parton densities and the Collins-Soper evolution kernel
• The transverse momentum dependent distribution functions in the bag model
• Transversity parton distribution functions from lattice QCD
• First extraction of valence transversities in a collinear framework
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Collins asymmetries
• Unified framework for generalized and transverse-momentum dependent parton distributions within a 3Q light-cone picture of the nucleon
• Collins Fragmentation and the Single Transverse Spin Asymmetry
• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Observation of transverse polarization asymmetries of charged pion pairs in e+e- annihilation near sqrt s=10.58 GeV
• Measurement of Collins asymmetries in inclusive production of charged pion pairs in e^+e^- annihilation at BABAR
• First glances at the transversity parton distribution through dihadron fragmentation functions
• Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
• Fragmentation contribution to the transverse single-spin asymmetry in proton-proton collisions
• Azimuthal spin asymmetries in light-cone constituent quark models
• Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering
• Parton Fragmentation within an Identified Jet at NNLL
• Angular dependences in inclusive two-hadron production at BELLE
• Collins functions for pions from SIDIS and new e+e- data: a first glance at their transverse momentum dependence
• Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons
• Twist-three Fragmentation Function Contribution to the Single Spin Asymmetry in pp Collisions
• Fully-Unintegrated Parton Distribution and Fragmentation Functions at Perturbative k_T
• Collins fragmentation function for pions and kaons in a spectator model
• Nucleon structure from basis light-front quantization
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
• Collins azimuthal asymmetries of hadron production inside jets
• Modeling dihadron fragmentation functions
• Pretzelosity distribution function h_1T^perp and the single spin asymmetry A_UT^sin(3phi-phi_S)
• Measurement of azimuthal asymmetries in inclusive charged dipion production in $e^{+}{e}^{-}$ annihilations at $\sqrt{s}$ = 3.65 GeV
• Flavor Structure of the Nucleon Sea
• Transverse Spin Structure of the Nucleon through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic $(e,e^{\prime }{\pi }^{\pm })$ Reaction at Jefferson Lab
• Polarized hadron pair production from electron-positron annihilation
• On the role of Collins effect in the single spin asymmetry A_N in p(transv. polarized) p --> h X processes
• Are there approximate relations among transverse momentum dependent distribution functions?
• Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation
• Nucleon tensor charge from Collins azimuthal asymmetry measurements
• Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions
• QCD evolution of naive-time-reversal-odd parton distribution functions
• Unveiling the nucleon tensor charge at Jefferson Lab: A study of the SoLID case
• Light-cone divergence in twist-3 correlation functions
• Single Spin Asymmetry Scaling in the Forward Rapidity Region at RHIC
• Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500$ GeV
• Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3\mathrm{He}$ Target
• Cross Section and Transverse Single-Spin Asymmetry of $\eta$ Mesons in $p^{\uparrow }+p$ Collisions at $\sqrt{s}=200$ GeV at Forward Rapidity
• Comparative analysis of the transversities and the longitudinally polarized distribution functions of the nucleon
• QCD evolution of naive-time-reversal-odd fragmentation functions
• Testing the process dependence of the Sivers function via hadron distributions inside a jet
• Transverse Momentum Dependent Parton Distribution/Fragmentation Functions at an Electron-Ion Collider
• Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive ${\pi }^0$ production
• Extracting the transversity distributions from single-hadron and dihadron production
• Tensor charges and form factors of SU(3) baryons in the self-consistent SU(3) chiral quark-soliton model
• Role of the Soffer bound in determination of transversity and the tensor charge
• Tensor polarization dependent fragmentation functions and e+e-\to V πX at high energies
• Transverse Spin Structure of the Nucleon
• Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies
• Phenomenology of transverse spin: past, present and future
• Single spin asymmetries in l p --> h X processes: a test of factorization
• Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p${}^{\uparrow }$+p collisions at $\sqrt{s}$ = 500 GeV
• Collins Asymmetry at Hadron Colliders
• Higher twist contribution to fragmentation function in inclusive hadron production in e^+e^- annihilation
• Momentum sum rules for fragmentation functions
• Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 10.58 GeV
• Studies of Azimuthal Modulations in Two Hadron Fragmentation of a Transversely Polarised Quark
• Anomalous tensor magnetic moments and form factors of the proton in the self-consistent chiral quark-soliton model
• Invariant-mass and fractional-energy dependence of inclusive production of di-hadrons in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 10.58 GeV
• Multidifferential study of identified charged hadron distributions in $Z$-tagged jets in proton-proton collisions at $\sqrt{s}=$13 TeV
• Double spin asymmetry A_{LT} in direct photon production
• Single spin asymmetries in inclusive hadron production from SIDIS to hadronic collisions: universality and phenomenology
• Quark fragmentation in the $\theta$-vacuum
• Collins Fragmentation Function within NJL-jet Model
• New target transverse spin dependent azimuthal asymmetries from COMPASS experiment
• Transversity and T-odd PDFs from Drell-Yan processes with $pp$, $pD$ and $DD$ collisions
• Azimuthal asymmetries of back-to-back ${\pi }^{\pm }-({\pi }^0,\eta ,{\pi }^{\pm })$ pairs in $e^{+}{e}^{-}$ annihilation
• Nucleon tensor form factors induced by isovector and isoscalar currents in QCD
• Longitudinal and transverse polarizations of $\Lambda$ hyperon in unpolarized SIDIS and $e^{+}{e}^{-}$ annihilation
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Twist-3 T-odd fragmentation functions $G^{\perp }$ and ${\tilde{G}}^{\perp }$ in a spectator model
• Tensor form factors of nucleon in QCD
• Twist-4 T-even proton TMDs in the light-front quark-diquark model
• Twist-4 contributions to semi-inclusive $e^{+}{e}^{-}$-annihilation process
• Beam-helicity asymmetries for single-hadron production in semi-inclusive deep-inelastic scattering from unpolarized hydrogen and deuterium targets
• Semi-Inclusive ${\pi }_0$ target and beam-target asymmetries from 6 GeV electron scattering with CLAS
• Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in $p$$+$$p$ collisions at $\sqrt{s}$=510 GeV
• Transverse spin dependent azimuthal asymmetries at COMPASS
• Role of transverse momentum dependence of unpolarised parton distribution and fragmentation functions in the analysis of azimuthal spin asymmetries
• Dihadron Azimuthal Correlation from Collins Effect in Unpolarized Hadron Collisions
• Transverse momentum dependent of charged pion, kaon and proton/antiproton fragmentation functions from $e^{+}{e}^{-}$ annihilation process
• Semi-inclusive back-to-back production of a hadron pair and a single hadron in $e^{+}{e}^{-}$ annihilation
• Inclusive and semi-inclusive production of spin-3/2 hadrons in $e^{+}{e}^{-}$ annihilation
• Transverse Momentum and Transverse Momentum Distributions in the MIT Bag Model
• Transverse strange quark spin structure of the nucleon
• Tensor form factors of the octet hyperons in QCD
• Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p+p$ collisions at $\sqrt{s}=200$ GeV
• The Fractured Boer-Mulders Effect in the Production of Polarized Baryons
• Sivers and Collins Single Spin Asymmetries
• Single Spin Asymmetry in Inclusive Hadron Production in pp Scattering from Collins Mechanism
• Spin Orbit Correlations and the Structure of the Nucleon
• 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
• Single-inclusive hadron production in transversely polarized p-p and pbar-p collisions with threshold resummation
• Effects of Quark Spin Flip on the Collins Fragmentation Function in a Toy Model
• Studies of spin-orbit correlations at JLAB
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Isovector and isoscalar tensor form factors of $N(1535)\to N$ transition in light-cone QCD
• Overview of TMD evolution
• Double Spin Asymmetries through QCD Instantons
• ECCE Sensitivity Studies for Single Hadron Transverse Single Spin Asymmetry Measurements
• Measurement of the Transverse Single-Spin Asymmetry for Mid-rapidity Production of Neutral Pions in Polarized p+p Collisions at 200 GeV Center-of-Mass Energy
• A Proposal for the Muon Piston Calorimeter Extension (MPC-EX) to the PHENIX Experiment at RHIC
• Nonperturbative factorization breaking and color entanglement effects in dihadron and direct photon-hadron angular correlations in $p$$+$$p$ and $p$$+$A collisions
• Transversity Physics at Compass
• Single/Double-Spin Asymmetry Measurements of Semi-Inclusive Pion Electroproduction on a Transversely Polarized 3He Target through Deep Inelastic Scattering
• Recent developments in nucleon spin structure with focus on h_{1L}^{\perp} and pretzelosity h_{1T}^\perp
• The transversity parton distribution function of the nucleon using the pseudo-distribution approach
• Transverse Single-Spin Asymmetries of Midrapidity Direct Photons, Neutral Pions, and Eta Mesons in 200 GeV Polarized Proton-Proton Collisions at PHENIX
• Phenomenology of Transverse Momentum Dependent Parton Densities
• Transverse momentum dependent quark distributions and polarized Drell-Yan processes