Z. Chang

activity

20122026

most citedBulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program

633 citations · 7.6k across the 170 of their papers we have counts for

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44 papers · 1 filter

hep-ex2025

Study of Central Exclusive Production of $π^{+} π^{-}$ , $K^{+} K^{-}$ and $p p ˉ$ Pairs in Proton-Proton Collisions at $s = 510$ GeV with the STAR Detector at RHIC

STAR Collaboration, B. E. Aboona, J. Adam +378

We report on the first measurement of the Central Exclusive Production process in proton-proton collisions: $pp \to p h^{+} h^{-} p$ (where $h = π, K, p$ ) at the center-of-…

hep-ex2025★ 4 cited

Energy Independence of the Collins Asymmetry in $p^{↑} p$ Collisions

STAR Collaboration, B. E. Aboona, J. Adam +367

The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for $π^{\pm}$ within jets, namely the Collins asymmetries, from transversely…

hep-ex2025★ 16 cited

Measuring spin correlation between quarks during QCD confinement

The STAR Collaboration

The vacuum is now understood to possess a rich and complex structure, characterized by fluctuating energy fields and a condensate of virtual quark-antiquark pairs. The spontaneous…

hep-ex2025

Recent results from STAR for parton distribution functions at low and high $x$ in proton-proton collisions

Zilong Chang

According to perturbative quantum chromodynamic calculations, in $pp$ collisions at $s =$ ~200 and 510 GeV studied at RHIC, jet production in mid-pseudorapidity, $∣ η ∣ <$ 1,…

hep-ex2023★ 1 cited

Results on Elastic Cross Sections in Proton-Proton Collisions at $s = 510$ GeV with the STAR Detector at RHIC

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +351

We report results on an elastic cross section measurement in proton-proton collisions at a center-of-mass energy $s = 510$ GeV, obtained with the Roman Pot setup of the STAR e…

hep-ex2023★ 8 cited

Longitudinal and transverse spin transfer to $Λ$ and $Λ$ hyperons in polarized $p$ + $p$ collisions at $s = 200$ GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +364

The longitudinal and transverse spin transfers to $Λ$ ( $Λ$ ) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity di…

hep-ex2023★ 1 cited

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Dijet Production at Intermediate Pseudorapidity in Polarized Proton+Proton Collisions at $s$ = 200 GeV

Zilong Chang, Ting Lin

Measurements of the longitudinal double-spin asymmetry, $A_{LL}$ , by the STAR experiment have contributed significantly to our understanding of the gluon helicity distribution, $Δg…

hep-ex2022★ 17 cited

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

STAR Collaboration, M. S. Abdallah, B. E. Aboona +357

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…

hep-ex2021

Inclusive Jet Cross Section Measurements in $pp$ Collisions at $s =$ 200 and 510 GeV with STAR

Zilong Chang

Jets, clusters of collimated particles produced in high energy proton-proton ( $pp$ ) collisions, are an excellent tool to study the internal structure of the proton. According to pe…

hep-ex2021

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $s = 510$ GeV

STAR Collaboration, M. S. Abdallah, B. E. Aboona +382

We report measurements of the longitudinal double-spin asymmetry, $A_{LL}$ , for inclusive jet and dijet production in polarized proton-proton collisions at midrapidity and center-o…

hep-ex2021★ 16 cited

Invariant Jet Mass Measurements in $pp$ Collisions at $s = 200$ GeV at RHIC

STAR Collaboration, M. S. Abdallah, J. Adam +377

We present the first inclusive measurements of the invariant and SoftDrop jet mass in proton-proton collisions at $s = 200$ GeV at STAR. The measurements are fully corrected f…

hep-ex2021★ 28 cited

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $s = 200$ GeV

STAR Collaboration, M. S. Abdallah, J. Adam +378

We report high-precision measurements of the longitudinal double-spin asymmetry, $A_{LL}$ , for midrapidity inclusive jet and dijet production in polarized $pp$ collisions at a cent…

hep-ex2020★ 33 cited

Measurement of transverse single-spin asymmetries of $π^{0}$ and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

STAR Collaboration, J. Adam, L. Adamczyk +359

The STAR Collaboration reports measurements of the transverse single-spin asymmetry (TSSA) of inclusive $π^{0}$ at center-of-mass energies ( $s$ ) of 200 GeV and 500 GeV in trans…

hep-ex2020★ 1 cited

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s$ = 200 GeV Obtained with the STAR Detector at RHIC

W. Guryn, B. Pawlik

We report the first results on differential, total and elastic cross sections in proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) at $s = 200$ GeV. The d…

hep-ex2020★ 20 cited

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $s = 200$ GeV with the STAR detector at RHIC

STAR Collaboration, J. Adam, L. Adamczyk +352

We report on the measurement of the Central Exclusive Production of charged particle pairs $h^{+} h^{-}$ ( $h = π, K, p$ ) with the STAR detector at RHIC in proton-proton collisions a…

hep-ex2020★ 15 cited

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s = 200$ GeV

STAR Collaboration, J. Adam, L. Adamczyk +352

We report results on the total and elastic cross sections in proton-proton collisions at $s = 200$ GeV obtained with the Roman Pot setup of the STAR experiment at the Relativi…

hep-ex2020★ 42 cited

Measurement of Groomed Jet Substructure Observables in \pp Collisions at $s = 200$ GeV with STAR

STAR Collaboration, J. Adam, L. Adamczyk +348

In this letter, measurements of the shared momentum fraction ( $z_{g}$ ) and the groomed jet radius ( $R_{g}$ ), as defined in the SoftDrop algorihm, are reported in \pp coll…

hep-ex2019

Gluon polarization measurements from longitudinally polarized proton-proton collisions at STAR

Zilong Chang

Jets produced in the pseudo-rapidity range, $- 1.0 < η < 1.0$ , from $pp$ collisions at RHIC kinematics are dominated by quark-gluon and gluon-gluon scattering processes. Therefore th…

hep-ex2019

Inclusive Jet Measurements in Longitudinally Polarized proton-proton Collisions at STAR

Zilong Chang

Jet production in high energy proton-proton ( $p + p$ ) collisions is dominated by hard QCD subprocesses such as gluon-gluon and quark-gluon scatterings. Therefore $p + p$ is an effectiv…

hep-ex2019

Gluon polarization measurements from longitudinally polarized proton-proton collisions at STAR

Zilong Chang

The gluon polarization contribution to the proton spin is an integral part to solve the longstanding proton spin puzzle. At the Relativistic Heavy Ion Collider (RHIC), the STAR exp…

hep-ex2019

Inclusive Jet Longitudinal Double-spin Asymmetry $A_{LL}$ Measurements in 510 GeV Polarized $pp$ Collisions at STAR

Zilong Chang

In this analysis, I perform the first ever measurement of $A_{LL}$ for inclusive jet production in $pp$ collisions at the higher beam energy of $\sqrt{s}$ = 510 GeV, based on…

hep-ex2019★ 60 cited

Longitudinal double-spin asymmetry for inclusive jet and dijet production in $pp$ collisions at $s = 510$ GeV

STAR Collaboration, J. Adam, L. Adamczyk +343

We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, $A_{LL}$ , at midrapidity in polarized $pp$ collisions at a center-of-mass e…

hep-ex2019★ 17 cited

Measurements of the transverse-momentum-dependent cross sections of $J / ψ$ production at mid-rapidity in proton+proton collisions at $s =$ 510 and 500 GeV with the STAR detector

STAR Collaboration, J. Adam, L. Adamczyk +343

We present measurements of the differential cross sections of inclusive $J / ψ$ meson production as a function of transverse momentum ( $p_{T}^{J / ψ}$ ) using the $μ^{+} μ^{-}$ and $e^{+…

hep-ex2019★ 47 cited

Observation of excess J/ $ψ$ yield at very low transverse momenta in Au+Au collisions at $s_{NN} =$ 200 GeV and U+U collisions at $s_{NN} =$ 193 GeV

STAR Collaboration

We report on the first measurements of J/ $ψ$ production at very low transverse momentum ( $p_{T} <$ 0.2 GeV/c) in hadronic Au+Au collisions at $s_{NN} =$ 200 GeV and U+U…

Study of Central Exclusive Production of π+π−, K+K− and ppˉ​ Pairs in Proton-Proton Collisions at s​=510 GeV with the STAR Detector at RHIC

Energy Independence of the Collins Asymmetry in p↑p Collisions

Measuring spin correlation between quarks during QCD confinement

Recent results from STAR for parton distribution functions at low and high x in proton-proton collisions

Results on Elastic Cross Sections in Proton-Proton Collisions at s​=510 GeV with the STAR Detector at RHIC

Longitudinal and transverse spin transfer to Λ and Λ hyperons in polarized p+p collisions at s​=200 GeV

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Dijet Production at Intermediate Pseudorapidity in Polarized Proton+Proton Collisions at s​ = 200 GeV

Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized pp collisions at s​ = 200 GeV

Inclusive Jet Cross Section Measurements in pp Collisions at s​= 200 and 510 GeV with STAR

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at s​=510 GeV

Invariant Jet Mass Measurements in pp Collisions at s​=200 GeV at RHIC

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at s​=200 GeV

Measurement of transverse single-spin asymmetries of π0 and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at s​ = 200 GeV Obtained with the STAR Detector at RHIC

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at s​=200 GeV with the STAR detector at RHIC

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at s​=200 GeV

Measurement of Groomed Jet Substructure Observables in \pp Collisions at s​=200 GeV with STAR

Gluon polarization measurements from longitudinally polarized proton-proton collisions at STAR

Inclusive Jet Measurements in Longitudinally Polarized proton-proton Collisions at STAR

Gluon polarization measurements from longitudinally polarized proton-proton collisions at STAR

Inclusive Jet Longitudinal Double-spin Asymmetry ALL​ Measurements in 510 GeV Polarized pp Collisions at STAR

Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at s​=510 GeV

Measurements of the transverse-momentum-dependent cross sections of J/ψ production at mid-rapidity in proton+proton collisions at s​= 510 and 500 GeV with the STAR detector

Observation of excess J/ψ yield at very low transverse momenta in Au+Au collisions at sNN​​= 200 GeV and U+U collisions at sNN​​= 193 GeV

Study of Central Exclusive Production of $π^{+} π^{-}$ , $K^{+} K^{-}$ and $p p ˉ$ Pairs in Proton-Proton Collisions at $s = 510$ GeV with the STAR Detector at RHIC

Energy Independence of the Collins Asymmetry in $p^{↑} p$ Collisions

Recent results from STAR for parton distribution functions at low and high $x$ in proton-proton collisions

Results on Elastic Cross Sections in Proton-Proton Collisions at $s = 510$ GeV with the STAR Detector at RHIC

Longitudinal and transverse spin transfer to $Λ$ and $Λ$ hyperons in polarized $p$ + $p$ collisions at $s = 200$ GeV

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Dijet Production at Intermediate Pseudorapidity in Polarized Proton+Proton Collisions at $s$ = 200 GeV

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

Inclusive Jet Cross Section Measurements in $pp$ Collisions at $s =$ 200 and 510 GeV with STAR

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $s = 510$ GeV

Invariant Jet Mass Measurements in $pp$ Collisions at $s = 200$ GeV at RHIC

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $s = 200$ GeV

Measurement of transverse single-spin asymmetries of $π^{0}$ and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s$ = 200 GeV Obtained with the STAR Detector at RHIC

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $s = 200$ GeV with the STAR detector at RHIC

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s = 200$ GeV

Measurement of Groomed Jet Substructure Observables in \pp Collisions at $s = 200$ GeV with STAR

Inclusive Jet Longitudinal Double-spin Asymmetry $A_{LL}$ Measurements in 510 GeV Polarized $pp$ Collisions at STAR

Longitudinal double-spin asymmetry for inclusive jet and dijet production in $pp$ collisions at $s = 510$ GeV

Measurements of the transverse-momentum-dependent cross sections of $J / ψ$ production at mid-rapidity in proton+proton collisions at $s =$ 510 and 500 GeV with the STAR detector

Observation of excess J/ $ψ$ yield at very low transverse momenta in Au+Au collisions at $s_{NN} =$ 200 GeV and U+U collisions at $s_{NN} =$ 193 GeV