Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV

Abstract

The STAR Collaboration reports measurements of the transverse single-spin asymmetries, $A_N$, for inclusive jets and identified `hadrons within jets' production at midrapidity from transversely polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV, based on data recorded in 2012 and 2015. The inclusive jet asymmetry measurements include $A_N$ for inclusive jets and $A_N$ for jets containing a charged pion carrying a momentum fraction $z>0.3$ of the jet momentum. The identified hadron within jet asymmetry measurements include the Collins effect for charged pions, kaons and protons, and the Collins-like effect for charged pions. The measured asymmetries are determined for several distinct kinematic regions, characterized by the jet transverse momentum $p_T$ and pseudorapidity $\eta$, as well as the hadron momentum fraction $z$ and momentum transverse to the jet axis $j_T$. These results probe higher momentum scales ($Q^2$ up to $\sim$\,900 GeV${}^2$) than current, semi-inclusive deep inelastic scattering measurements, and they provide new constraints on quark transversity in the proton and enable tests of evolution, universality and factorization breaking in the transverse-momentum-dependent formalism.

arXiv comment24 pages, 24 figures, Accepted by PRD

References in corpus (92)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• FastJet user manual
• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Tuning Monte Carlo Generators: The Perugia Tunes
• Pileup subtraction using jet areas
• Time-reversal odd distribution functions in leptoproduction
• Parton Physics on Euclidean Lattice
• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
• Universality of T-odd effects in single spin and azimuthal asymmetries
• Resummation of non-global QCD observables
• Universality of soft and collinear factors in hard-scattering factorization
• Single Transverse-Spin Asymmetries in Hadronic Pion Production
• Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering
• Cross Sections and Transverse Single-Spin Asymmetries in Forward Neutral-Pion Production from Proton Collisions at \sqrt{s} = 200 GeV
• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
• The neutron and its role in cosmology and particle physics
• 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
• No Generalized TMD-Factorization in the Hadro-Production of High Transverse Momentum Hadrons
• Measuring transversity densities in singly polarized hadron-hadron and lepton-hadron collisions
• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• Nucleon Helicity and Transversity Parton Distributions from Lattice QCD
• Away-from-jet energy flow
• The RHIC Zero Degree Calorimeter
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Effects of transversity in deep-inelastic scattering by polarized protons
• A Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes
• The QCD Evolution of the Sivers Function
• Parton distributions and lattice QCD calculations: toward 3D structure
• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at \sqrt{s} = 10.58 GeV
• Axial, Scalar and Tensor Charges of the Nucleon from 2+1+1-flavor Lattice QCD
• Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Transversity parton distribution functions from lattice QCD
• Origin of single transverse-spin asymmetries in high-energy collisions
• Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s}=200$ GeV
• First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process
• A Unified Treatment of the QCD Evolution of All (Un-)Polarized TMD Functions: Collins Function as a Study Case
• Collins Fragmentation and the Single Transverse Spin Asymmetry
• Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton
• Extensive Particle Identification with TPC and TOF at the STAR Experiment
• First Extraction of Transversity from a Global Analysis of Electron-Proton and Proton-Proton Data
• Gluon-Exchange in Spin-Dependent Fragmentation
• Observation of transverse polarization asymmetries of charged pion pairs in e+e- annihilation near sqrt s=10.58 GeV
• First Monte Carlo global analysis of nucleon transversity with lattice QCD constraints
• Measurement of Collins asymmetries in inclusive production of charged pion pairs in e^+e^- annihilation at BABAR
• Identified hadron compositions in p+p and Au+Au collisions at high transverse momenta at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering
• Measurement of the transverse single-spin asymmetry in $p^{\uparrow }+p\to W^{\pm }/Z^0$ at RHIC
• Collins functions for pions from SIDIS and new e+e- data: a first glance at their transverse momentum dependence
• Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs
• A high-statistics measurement of transverse spin effects in dihadron production from muon-proton semi-inclusive deep-inelastic scattering
• Partonic Pole Matrix Elements for Fragmentation
• Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
• Collins azimuthal asymmetries of hadron production inside jets
• The STAR Vertex Position Detector
• The transverse momentum distribution of hadrons within jets
• Measurement of azimuthal asymmetries in inclusive charged dipion production in $e^{+}{e}^{-}$ annihilations at $\sqrt{s}$ = 3.65 GeV
• Longitudinal double-spin asymmetry for inclusive jet and dijet production in $pp$ collisions at $\sqrt{s}=510$ GeV
• Sivers asymmetry extracted in SIDIS at the hard scale of the Drell-Yan process at COMPASS
• Indication on the process-dependence of the Sivers effect
• Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions
• Dihadron interference fragmentation functions in proton-proton collisions
• Charged jet cross sections and properties in proton-proton collisions at $\sqrt{s}=7$ TeV
• 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
• Measurement of Groomed Jet Substructure Observables in \pp Collisions at $\sqrt{s}=200$ GeV with STAR
• Observation of Transverse Spin-Dependent Azimuthal Correlations of Charged Pion Pairs in $p^{\uparrow }+p$ at $\sqrt{s}=200$ GeV
• Testing the process dependence of the Sivers function via hadron distributions inside a jet
• Collins asymmetries in inclusive charged $KK$ and $K\pi$ pairs produced in $e^{+}{e}^{-}$ annihilation
• Spin asymmetries in electron-jet production at the future electron ion collider
• Role of the Soffer bound in determination of transversity and the tensor charge
• Measurement of transverse single-spin asymmetries of ${\pi }^0$ and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions
• Testing the universality of the Collins function in pion-jet production at RHIC
• Constrained fit of the valence transversity distributions from dihadron production
• Cross Sections and Transverse Single-Spin Asymmetries in Forward Jet Production from Proton Collisions at $\sqrt{s}=500$ GeV
• Collins Asymmetry at Hadron Colliders
• Improving the dE/dx calibration of the STAR TPC for the high-pT hadron identification
• Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $\sqrt{s}=200$ GeV
• Accessing the nucleon transverse structure in inclusive deep inelastic scattering
• Invariant-mass and fractional-energy dependence of inclusive production of di-hadrons in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 10.58 GeV
• Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate Pseudorapidity in Polarized $pp$ Collisions at $\sqrt{s}$ = 200 GeV
• Azimuthal asymmetries of back-to-back ${\pi }^{\pm }-({\pi }^0,\eta ,{\pi }^{\pm })$ pairs in $e^{+}{e}^{-}$ annihilation
• Underlying event measurements in $p$+$p$ collisions at $\sqrt{s}=200$ GeV at RHIC
• Invariant Jet Mass Measurements in $pp$ Collisions at $\sqrt{s}=200$ GeV at RHIC
• Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^{\uparrow }+p$ collisions at $\sqrt{s}=200$ GeV
• Transverse single-spin asymmetries of midrapidity ${\pi }^0$ and $\eta$ mesons in polarized $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV
• Heavy Flavor Tracker (HFT) : A new inner tracking device at STAR
• On the Relation Between Mechanisms for Single-Transverse-Spin Asymmetries

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• Energy Independence of the Collins Asymmetry in $p^{\uparrow }p$ Collisions
• Precision measurement of the longitudinal double-spin asymmetry for dijet production at intermediate pseudorapidity in polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV
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