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Isolation of Flow and Nonflow by Two- and Multi-Particle Cumulant Measurements of $v_n$ in $\sqrt{s_{NN}} = 200$ GeV Au+Au Collisions by STAR
Nuclear Experiment · Submitted 24 Oct 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The $\Delta\eta$-independent part, dominated by flow, is found to be $\eta$-independent within the STAR TPC of $\pm1$ unit of pseudo-rapidity.
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The abstract, sentence by sentence
We apply a data-driven method to STAR Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV to isolate $\Delta\eta$-dependent and $\Delta\eta$-independent correlations by using two- and four-particle Q-cumulant $v_{n}$ measurements. The $\Delta\eta$-independent part, dominated by flow, is found to be $\eta$-independent within the STAR TPC of $\pm1$ unit of pseudo-rapidity. The $\Delta\eta$-dependent part may be associated to nonflow, and is responsible for the $\Delta\eta$ drop in the measured two-particle $v_{2}$ cumulant. We combine our result to four- and six-particle cumulants to gain further insights on the nature of flow fluctuations.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We apply a data-driven method to STAR Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV to isolate $\Delta\eta$-dependent and $\Delta\eta$-independent correlations by using two- and four-particle Q-cumulant $v_{n}$ measurements. | method 0.80 | 0.97 | 0.13 | asserted 1.00 |
| s1 | The $\Delta\eta$-independent part, dominated by flow, is found to be $\eta$-independent within the STAR TPC of $\pm1$ unit of pseudo-rapidity. | result 1.00 | 0.95 | 0.36 | asserted 1.00 |
| s2 | The $\Delta\eta$-dependent part may be associated to nonflow, and is responsible for the $\Delta\eta$ drop in the measured two-particle $v_{2}$ cumulant. | interpretation 0.86 | 0.79 | 0.24 | hedged possibility 0.89 |
| s3 | We combine our result to four- and six-particle cumulants to gain further insights on the nature of flow fluctuations. | contribution 0.61 | 0.93 | 0.07 | asserted 0.77 |
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The paper
Original abstract
We apply a data-driven method to STAR Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV to isolate $\Delta\eta$-dependent and $\Delta\eta$-independent correlations by using two- and four-particle Q-cumulant $v_{n}$ measurements. The $\Delta\eta$-independent part, dominated by flow, is found to be $\eta$-independent within the STAR TPC of $\pm1$ unit of pseudo-rapidity. The $\Delta\eta$-dependent part may be associated to nonflow, and is responsible for the $\Delta\eta$ drop in the measured two-particle $v_{2}$ cumulant. We combine our result to four- and six-particle cumulants to gain further insights on the nature of flow fluctuations.
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References
How the literature uses it
1 arXiv paper cite this in 1 sentence
Papers whose main result relates to this one's
States the same result 1 paper
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We identified a component of the correlation that is $\Delta\eta$-independent, which is likely dominated by anisotropic flow and flow fluctuations.
Papers citing it
Cites it as background 1 paper
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and in some recent theory and experiment of azimuthal and jet-like correlations [ref] .
Internal cumulants for femtoscopy with fixed charged multiplicity · Cumulants in multiparticle physics · 0.93
What it cites · 1 sentence without a confident label
Uses the method or tool of 1 paper
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The Q-cumulant method [ref] is used with the acceptance correction in calculation.
Possibility to disentangle anisotropic flow, flow fluctuation, and nonflow assuming Gaussian fluctuations · Data Analysis and Results · 1.00
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