Invariant jet mass measurements in 
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 collisions at 
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 at RHIC

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doi:10.1103/physrevd.104.052007

Cited by 10 publications

(2 citation statements)

References 92 publications

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“…There is no significant change of the jet mass distribution between low and high EA events. Additionally, the 𝑝+Au jet mass distribution is consistent with QCD predictions as well as STAR 𝑝+𝑝 jet mass [7].…”

Section: Resultssupporting

confidence: 78%

Measurements of jet and soft activity in $\sqrt{s_{{\rm NN}}}= 200$ GeV $p$+Au collisions at STAR

Verkest¹

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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Measurements of the jet nuclear modification factor in 𝑝(𝑑)+A collisions at the LHC and RHIC have unexpectedly indicated that jet yields are suppressed and/or enhanced as a function of event activity (EA). Recent preliminary measurements from STAR in 𝑝+Au collisions at √ 𝑠 NN = 200 GeV demonstrate correlations between high-𝑄 2 parton scatterings and EA measured at backward (Augoing) rapidities or underlying event (UE) at mid-rapidity. The measurements at STAR disfavor jet quenching as an explanation for the suppression of jet yield observed in high-EA collisions and indicate that these correlations result from the early stages of proton-ion collisions. In these proceedings, we show correlations of backward-rapidity EA with mid-rapidity UE, as well as measurements of EA-dependent modifications to charged hadron spectra and jets. In particular, we present measurements of the UE for various EA selections and discuss its kinematic dependence on jet pseudorapidity and transverse momentum (𝑝 T ) as a means of examining the correlation between initial hard scatterings and soft processes. We also investigate the EA dependence of high-𝑝 T hadron and jet properties-including fully corrected jet substructure observables-to study the impact of initial and final state effects.

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Section: Resultssupporting

confidence: 78%

Measurements of jet and soft activity in $\sqrt{s_{{\rm NN}}}= 200$ GeV $p$+Au collisions at STAR

Verkest¹

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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“…Several systematic uncertainties were determined by varying the properties of the GEANT3 simulation, including the hadronic correction used in data analysis, the tower gain, and the tracking efficiency of the TPC. Similar uncertainties were used in previous studies done by STAR [11,12]. In addition to the effect of varying the properties of the detector simulation, the additional uncertainty of the variables that were not corrected for -i.e.…”

Section: Methodsmentioning

confidence: 96%

Measurement of Two-Point Energy Correlators Within1 Jets in 𝒑 𝒑 Collisions at $\sqrt{s}$ = 200 GeV at STAR

Tamis

2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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Jet substructure is a powerful tool to probe the time evolution of a parton shower. However, many of the analysis methods used to extract splitting formation times from jet substructure, such as Soft Drop grooming and the Lund plane, focus on the hardest radiation of the jet. A complementary observable with growing theoretical and experimental interest, the 2-point Energy Correlator (EEC), re-contextualizes jet substructure study by using the distribution of angular distance of all combinations of two final state particles within a jet. This distribution is weighted by the product of the fractions of jet energy that each of the constituents carry, and thus is infrared-and-collinear safe. The EEC can reveal the separation between two distinct regimes: effects originating from free hadrons at small opening angles and from perturbative fragmentation of quarks and gluons at large opening angles. In these proceedings, the first measurement of the EEC at RHIC is presented, using the data taken at √ 𝑠 = 200 GeV 𝑝 𝑝 collisions by STAR. The EEC will be shown for several full jet transverse momentum selections and compared to predictions from the PYTHIA-8 Detroit tune. This study is useful as a baseline for comparisons to future studies in heavy-ion collisions, which will provide information about how the quark-gluon plasma interacts with the jet across different angular scales.

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