Measurements of di-jets in p+p and Au+Au in the STAR experiment

Elena Bruna (for the STAR Collaboration)

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Measurements of di-jets in p+p and Au+Au in the STAR experiment

Elena Bruna (for the STAR Collaboration)

Nuclear Experiment · Submitted 27 Jan 2011

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We present measurements of di-jets and jet-hadron correlations in the presence of reconstructed di-jets in Au+Au and p+p at 200 GeV in the STAR experiment.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,847 input tokens, $0.0003 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.17 · human participants 0.02 · controlled comparison 0.91 · randomized assignment 0.02 · states quantitative result 0.09 · compares with prior results 0.60 · mentions code or data availability 0.02.

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arXiv listing abstract v1. Results and the main claim are underlined; show every role.

Jets are produced from hard scatterings in the early stages of heavy-ion collisions. It is expected that these high-p$_T$ partons travel through the hot and dense medium before fragmenting. Therefore they are expected to suffer energy loss in the QGP via gluon radiation or elastic collisions along their path. Measurements from full jet reconstruction help in the understanding of energy loss and its effect{\ss} on the jet structure and energy profile. A data-driven characterization of the background in Au+Au is needed in order to compare the results to p+p. The large coverage of the STAR detector along with an online trigger also allows for reconstructing di-jets. Suitable selection of trigger jets allows for studying a subset of jets on the recoil side which are biased towards higher energy loss because of a larger, on average, in-medium path length traversed. Trigger jets are also used to study jet-hadron correlations as an independent measurement to assess the effect of energy loss on the recoil side. We present measurements of di-jets and jet-hadron correlations in the presence of reconstructed di-jets in Au+Au and p+p at 200 GeV in the STAR experiment.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Jets are produced from hard scatterings in the early stages of heavy-ion collisions.	background 1.00	0.06	0.02	asserted 1.00
s1	It is expected that these high-p$_T$ partons travel through the hot and dense medium before fragmenting.	background 1.00	0.05	0.02	hedged possibility 0.88
s2	Therefore they are expected to suffer energy loss in the QGP via gluon radiation or elastic collisions along their path.	background 1.00	0.04	0.05	hedged possibility 0.76
s3	Measurements from full jet reconstruction help in the understanding of energy loss and its effect{\ss} on the jet structure and energy profile.	background 0.83	0.10	0.06	asserted 0.90
s4	A data-driven characterization of the background in Au+Au is needed in order to compare the results to p+p.	method 0.53	0.13	0.03	asserted 0.98
s5	The large coverage of the STAR detector along with an online trigger also allows for reconstructing di-jets.	method 0.98	0.40	0.03	asserted 0.72
s6	Suitable selection of trigger jets allows for studying a subset of jets on the recoil side which are biased towards higher energy loss because of a larger, on average, in-medium path length traversed.	method 0.92	0.35	0.07	asserted 0.77
s7	Trigger jets are also used to study jet-hadron correlations as an independent measurement to assess the effect of energy loss on the recoil side.	method 0.91	0.41	0.05	asserted 0.99
s8	We present measurements of di-jets and jet-hadron correlations in the presence of reconstructed di-jets in Au+Au and p+p at 200 GeV in the STAR experiment.	contribution 0.99	0.97	0.19	asserted 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.93.

What was examined, and what was not

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arXiv listing abstract v1

not examined

full text
figures and tables
references and citing sentences
relations to other papers

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P abstract

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S sections
T body sentences
C citations
R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

Jets are produced from hard scatterings in the early stages of heavy-ion collisions. It is expected that these high-p$_T$ partons travel through the hot and dense medium before fragmenting. Therefore they are expected to suffer energy loss in the QGP via gluon radiation or elastic collisions along their path. Measurements from full jet reconstruction help in the understanding of energy loss and its effect{\ss} on the jet structure and energy profile. A data-driven characterization of the background in Au+Au is needed in order to compare the results to p+p. The large coverage of the STAR detector along with an online trigger also allows for reconstructing di-jets. Suitable selection of trigger jets allows for studying a subset of jets on the recoil side which are biased towards higher energy loss because of a larger, on average, in-medium path length traversed. Trigger jets are also used to study jet-hadron correlations as an independent measurement to assess the effect of energy loss on the recoil side. We present measurements of di-jets and jet-hadron correlations in the presence of reconstructed di-jets in Au+Au and p+p at 200 GeV in the STAR experiment.

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What this paper does with the arXiv papers it cites

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites · 3 sentences without a confident label

Uses the method or tool of 3 papers

The jet-finding utilizes recombination algorithms included in the FastJet package [ref] .

The Catchment Area of Jets · Data sets and analysis · 1.00
The jet-finding utilizes recombination algorithms included in the FastJet package [ref] .

The anti-k_t jet clustering algorithm · Data sets and analysis · 1.00
The jet-finding utilizes recombination algorithms included in the FastJet package [ref] .

Dispelling the N^3 myth for the Kt jet-finder · Data sets and analysis · 1.00

Uses data or values from 3 papers

Region-to-region fluctuations are approximated by a Gaussian distribution with $σ=6.5$ GeV/c for $p_T^cut=0.2$ GeV/c [ref] .

Measurements of jet structure and fragmentation from full jet reconstruction in heavy ion collisions at RHIC · Data sets and analysis · 0.92
Region-to-region fluctuations are approximated by a Gaussian distribution with $σ=6.5$ GeV/c for $p_T^cut=0.2$ GeV/c [ref] .

Inclusive cross section and correlations of fully reconstructed jets in 200 GEV Au+Au and p+p collisions · Data sets and analysis · 0.92
The associated hadron $v_2$ values are taken from [ref] .

Long range rapidity correlations and jet production in high energy nuclear collisions · Jet-hadron correlations with reconstructed di-jets · 1.00

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