papers

Publications (57)

nucl-ex2024

Reaction plane correlated triangular flow in Au+Au collisions at GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +349

We measure triangular flow relative to the reaction plane at 3 GeV center-of-mass energy in Au+Au collisions at the BNL Relativistic Heavy Ion Collider. A significant signal…

hep-ph2023

Pattern of Global Spin Alignment of and mesons in Heavy-Ion Collisions

STAR Collaboration, M. S. Abdallah, B. E. Aboona +379

Notwithstanding decades of progress since Yukawa first developed a description of the force between nucleons in terms of meson exchange, a full understanding of the strong interact…

hep-ex2022

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

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

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

hep-ex2026

Study of Central Exclusive Production of , and Pairs in Proton-Proton Collisions at 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: (where ) at the center-of…

nucl-ex2023

Measurement of electrons from open heavy-flavor hadron decays in Au+Au collisions at GeV with the STAR detector

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +359

We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity ( 0.7) in Au+Au collisions at G…

nucl-ex2023

Search for the Chiral Magnetic Effect in Au+Au collisions at GeV with the STAR forward Event Plane Detectors

STAR Collaboration, B. E. Aboona, J. Adam +355

A decisive experimental test of the Chiral Magnetic Effect (CME) is considered one of the major scientific goals at the Relativistic Heavy-Ion Collider (RHIC) towards understanding…

nucl-ex2023

Observation of Directed Flow of Hypernuclei H and H in = 3 GeV Au+Au Collisions at RHIC

STAR Collaboration, B. E. Aboona, J. Adam +338

We report here the first observation of directed flow () of the hypernuclei H and H in mid-central Au+Au collisions at = 3 GeV at RHIC. These…

cond-mat.supr-con2006

The Influence of Synthesis Parameters on Microstructures and Superconducting Properties of MgB2 Bulks

Y. F. Wu, Y. Feng, G. Yan +8

We succeeded in the synthesis of high-Jc MgB2 bulks via high energy ball-milling of elemental Mg and B powder at ambient temperatures. Alternatively to longtime mechanical alloying…

nucl-ex2024

Observation of the Antimatter Hypernucleus

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +350

At the origin of the Universe, asymmetry between the amount of created matter and antimatter led to the matter-dominated Universe as we know today. The origins of this asymmetry re…

nucl-ex2023

Event-by-event correlations between () hyperon global polarization and handedness with charged hadron azimuthal separation in Au+Au collisions at from STAR

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +342

Global polarizations () of () hyperons have been observed in non-central heavy-ion collisions. The strong magnetic field primarily created by the spectator protons…

nucl-ex2022

Tomography of Ultra-relativistic Nuclei with Polarized Photon-gluon Collisions

STAR Collaboration, M. S. Abdallah, B. E. Aboona +380

A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultra-relativistic speed. When two relativistic heavy nuclei p…

nucl-ex2023

Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC

STAR Collaboration, M. S. Abdallah, B. E. Aboona +359

Partons traversing the strongly interacting medium produced in heavy-ion collisions are expected to lose energy depending on their color charge and mass. We measure the nuclear mod…

nucl-ex2022

Measurements of and Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region

STAR Collaboration, M. S. Abdallah, B. E. Aboona +388

We report precision measurements of hypernuclei and lifetimes obtained from Au+Au collisions at \snn = 3.0\,GeV and 7.2\,GeV collected by the STAR e…

nucl-ex2024

Correlations of event activity with hard and soft processes in + Au collisions at = 200 GeV at STAR

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +346

With the STAR experiment at the BNL Relativisic Heavy Ion Collider, we characterize = 200 GeV p+Au collisions by event activity (EA) measured within the pseu…

nucl-ex2024

Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at the Relativistic Heavy-Ion Collider

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +342

The chiral magnetic effect (CME) is a phenomenon that arises from the QCD anomaly in the presence of an external magnetic field. The experimental search for its evidence has been o…

nucl-ex2022

Centrality and transverse momentum dependence of higher-order flow harmonics of identified hadrons in Au+Au collisions at = 200 GeV

STAR Collaboration, M. S. Abdallah, B. E. Aboona +383

We present high-precision measurements of elliptic, triangular, and quadrangular flow , , and , respectively, at midrapidity () for identified hadron…

nucl-ex2023

Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

STAR Collaboration, B. E. Aboona, J. Adam +341

The linear and mode-coupled contributions to higher-order anisotropic flow are presented for Au+Au collisions at = 27, 39, 54.4, and 200 GeV and compared t…

nucl-ex2023

production in Au+Au collisions at = 7.7, 11.5, 14.5, 19.6, 27 and 39 GeV from RHIC beam energy scan

STAR Collaboration, M. S. Abdallah, B. E. Aboona +359

We report the measurement of meson at midrapidity ( 1.0) in Au+Au collisions at ~=~7.7, 11.5, 14.5, 19.6, 27 and 39 GeV collected by the STAR expe…

nucl-ex2022

Two-particle correlations on transverse rapidity in Au+Au collisions at GeV at STAR

STAR Collaboration, M. S. Abdallah, B. E. Aboona +381

Two-particle correlation measurements projected onto two-dimensional, transverse rapidity coordinates (), allow access to dynamical properties of the QCD medium prod…

nucl-ex2023

Elliptic Flow of Heavy-Flavor Decay Electrons in Au+Au Collisions at = 27 and 54.4 GeV at RHIC

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +359

We report on new measurements of elliptic flow () of electrons from heavy-flavor hadron decays at mid-rapidity () in Au+Au collisions at = 27 a…

nucl-ex2022

Evidence for Nonlinear Gluon Effects in QCD and their Dependence at STAR

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

The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-s produced at forward pseudorapidities () in +, Al, and Au…

nucl-ex2023

Measurement of sequential suppression in Au+Au collisions at = 200 GeV with the STAR experiment

STAR Collaboration, B. E. Aboona, J. Adam +357

We report on measurements of sequential suppression in Au+Au collisions at = 200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (R…

cond-mat.supr-con2006

Influence of Preparation Process on Microstructure, Critical Current Density and Tc of MgB2/Fe/Cu Wires

Y. F. Wu, G. Yan, J. S. Li +7

The powder-in-tube MgB2 wires were prepared by high energy milling of Mg and B powder. The powder was not mechanically alloyed for 2h short milling time. However, the MgB2 grains i…

nucl-ex2024

Measurement of flow coefficients in high-multiplicity +Au, +Au and HeAu collisions at =200 GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +350

Flow coefficients ( and ) are measured in high-multiplicity +Au, +Au, and HeAu collisions at a center-of-mass energy of = 200 G…

nucl-ex2024

Production of Protons and Light Nuclei in Au+Au Collisions at = 3 GeV with the STAR Detector

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +349

We report the systematic measurement of protons and light nuclei production in Au+Au collisions at = 3 GeV by the STAR experiment at the Relativistic Heavy…

hep-ex2026

Measurement of transverse polarization of and hyperons inside jets in collisions at GeV

STAR Collaboration, B. E. Aboona, J. Adam +363

A surprisingly large transverse polarization of hyperons in unpolarized hadron-nucleon/nucleus collisions has been observed for 50 years, and the origin of this polarization r…

nucl-ex2026

Identified charged hadron production in Au+Au collisions at = 54.4 GeV with the STAR detector

STAR Collaboration, B. E. Aboona, J. Adam +360

We present results on the production of , , , and in Au+Au collisions at = 54.4~GeV using the STAR detector at RHIC, at midra…

nucl-ex2026

Probing Late-Stage Hadronic Interactions at High Baryon Density via Production in the RHIC Beam Energy Scan Program

STAR Collaboration, B. E. Aboona, J. Adam +360

A precision measurement of the meson yield is reported in Au+Au collisions at and using the high-statistic…

nucl-ex2023

Higher-Order Cumulants and Correlation Functions of Proton Multiplicity Distributions in = 3 GeV Au+Au Collisions at the RHIC STAR Experiment

STAR Collaboration, M. S. Abdallah, B. E. Aboona +358

We report a measurement of cumulants and correlation functions of event-by-event proton multiplicity distributions from fixed-target Au+Au collisions at = 3 GeV…

hep-ex2026

Energy Independence of the Collins Asymmetry in Collisions

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

The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for within jets, namely the Collins asymmetries, from transversely…

cond-mat.supr-con2001

Preparation of 18-filament Cu/NbZr/MgB2 tape with high transport critical current density

C. F. Liu, S. J. Du, G. Yan +1

Cu-stabilized 18-filament MgB2 tapes with NbZr buffer have been fabricated by using powder-in-tube technique. The phase composition and microstructure were examined by X-ray diffra…

nucl-ex2025

Onset of Constituent Quark Number Scaling in Heavy-Ion Collisions at RHIC

STAR Collaboration, B. E. Aboona, J. Adam +355

Partonic collectivity is one of the necessary signatures for the formation of quark-gluon plasma in high-energy nuclear collisions. Number of constituent quarks (NCQ) scaling has b…

nucl-ex2026

Observation of charmonium sequential suppression in heavy-ion collisions at the Relativistic Heavy Ion Collider

STAR Collaboration, B. E. Aboona, J. Adam +370

We report measurements of charmonium sequential suppression in Ru+Ru and Zr+Zr collisions at = 200 GeV with the STAR experiment at the Relativistic Heavy…

nucl-ex2022

Light Nuclei Collectivity from = 3 GeV Au+Au Collisions at RHIC

STAR Collaboration, M. S. Abdallah, B. E. Aboona +383

In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of th…

cond-mat.supr-con2006

Improved Superconducting Properties in Bulk MgB2 Prepared by High Energy Milling of Mg and B Powder

Y. F. Wu, Y. F. Lu, G. Yan +7

The MgB2 bulks were prepared by high energy milling of Mg and B powder. The correlations among milling times, microstructure and superconducting properties were investigated in MgB…

nucl-ex2022

Probing the gluonic structure of the deuteron with photoproduction in d+Au ultra-peripheral collisions

STAR Collaboration, M. S. Abdallah, B. E. Aboona +388

Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson produ…

nucl-ex2024

Jet-hadron correlations with respect to the event plane in = 200 GeV Au+Au collisions in STAR

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +348

Angular distributions of charged particles relative to jet axes are studied in = 200 GeV Au+Au collisions as a function of the jet orientation with respect…

nucl-ex2022

Measurements of Proton High Order Cumulants in 3 GeV Au+Au Collisions and Implications for the QCD Critical Point

STAR Collaboration, M. S. Abdallah, B. E. Aboona +388

We report cumulants of the proton multiplicity distribution from dedicated fixed-target Au+Au collisions at 3.0 GeV, measured by the STAR experiment in the kinematic acceptance of…

nucl-ex2023

Beam Energy Dependence of Triton Production and Yield Ratio () in Au+Au Collisions at RHIC

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +342

We report the triton () production in mid-rapidity ( 0.5) Au+Au collisions at = 7.7--200 GeV measured by the STAR experiment from the first phase of…

nucl-ex2023

Energy Dependence of Intermittency for Charged Hadrons in Au+Au Collisions at RHIC

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

Density fluctuations near the QCD critical point can be probed via an intermittency analysis in relativistic heavy-ion collisions. We report the first measurement of intermittency…

hep-ex2026

Inclusive jet cross section in collisions at and GeV

STAR Collaboration, B. E. Aboona, J. Adam +377

Jets are collimated clusters of particles formed by the hadronization of partons following a hard interaction. In proton-proton () collisions at the Relativistic Heavy Ion Coll…

nucl-ex2023

Azimuthal anisotropy measurement of (multi-)strange hadrons in Au+Au collisions at = 54.4 GeV

STAR Collaboration, M. S. Abdallah, B. E. Aboona +356

Azimuthal anisotropy of produced particles is one of the most important observables used to access the collective properties of the expanding medium created in relativistic heavy-i…

nucl-ex2026

Measurement of Kaon Directed Flow in Au+Au Collisions in the High Baryon Density Region

STAR Collaboration, B. E. Aboona, J. Adam +360

Rapidity-odd directed flow measurements are presented for and in AuAu collisions at = 3.0, 3.2, 3.5, and 3.9 GeV with the STAR exp…

nucl-ex2024

Observation of the electromagnetic field effect via charge-dependent directed flow in heavy-ion collisions at the Relativistic Heavy Ion Collider

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +339

The deconfined quark-gluon plasma (QGP) created in relativistic heavy-ion collisions enables the exploration of the fundamental properties of matter under extreme conditions. Non-c…

nucl-ex2022

Measurement of and binding energy in Au+Au collisions at = 3 GeV

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

Measurements of mass and binding energy of and in Au+Au collisions at GeV are presented, with an aim to address the charge…

physics.ins-det2025

The STAR Forward Silicon Tracker

J. D. Brandenburg, Y. Chang, J. Dong +21

The Forward Silicon Tracker (FST) is a pivotal component of the forward upgrade of the Solenoidal Tracker at RHIC (STAR), designed to discern hadron charge signs with a momentum re…

nucl-ex2023

Pion, kaon, and (anti-)proton production in U+U Collisions at = 193 GeV measured with the STAR detector

STAR Collaboration, M. S. Abdallah, B. E. Aboona +339

We present the first measurements of transverse momentum spectra of , , at midrapidity () in U+U collisions at = 193 GeV…

nucl-ex2024

Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in + collisions at 200 GeV from STAR at RHIC

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +346

We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from GeV + collisions at the Relativistic Heavy Ion C…

nucl-ex2023

Measurements of the elliptic and triangular azimuthal anisotropies in central He+Au, +Au and +Au collisions at $\mbox{$\sqrt{s_{\mathrm{NN}}}$}$ = 200 GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +343

The elliptic () and triangular () azimuthal anisotropy coefficients in central He+Au, +Au, and +Au collisions at $\mbox{$\sqrt{s_{\mathrm{NN}}}$}$ = 200 GeV a…

nucl-ex2023

Beam Energy Dependence of Fifth and Sixth-Order Net-proton Number Fluctuations in Au+Au Collisions at RHIC

STAR Collaboration, B. E. Aboona, J. Adam +357

We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (, ) and factorial cumulants (, ) of net-proton and p…

hep-ex2024

Results on Elastic Cross Sections in Proton-Proton Collisions at 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 GeV, obtained with the Roman Pot setup of the STAR e…

cond-mat.dis-nn2004

Epidemic spread in weighted networks

G. Yan, Tao Zhou, Jie Wang +2

We study the detailed epidemic spreading process in scale-free networks with weight that denote familiarity between two people or computers. The result shows that spreading velocit…

hep-ex2022

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

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

The STAR Collaboration reports measurements of the transverse single-spin asymmetries, , for inclusive jets and identified `hadrons within jets' production at midrapidity from…

nucl-ex2024

Collision-energy Dependence of Deuteron Cumulants and Proton-deuteron Correlations in Au+Au collisions at RHIC

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

We report the first measurements of cumulants, up to order, of deuteron number distributions and proton-deuteron correlations in Au+Au collisions recorded by the STAR expe…

nucl-ex2024

Estimate of Background Baseline and Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at GeV at the Relativistic Heavy-Ion Collider

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +342

For the search of the chiral magnetic effect (CME), STAR previously presented the results from isobar collisions (, ${^{96}_{40}\text{Z…

hep-ex2023

Longitudinal and transverse spin transfer to and hyperons in polarized + collisions at GeV

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

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

nucl-ex2023

Hyperon polarization along the beam direction relative to the second and third harmonic event planes in isobar collisions at = 200 GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +345

The polarization of and hyperons along the beam direction has been measured relative to the second and third harmonic event planes in isobar Ru+Ru and Zr+Zr collision…