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Paper page: Inclusive jet cross-section in pp collisions at \sqrt{s} = 200 and 510 GeV

Updated on Mon, 2024-11-04 18:35. Originally created by veprbl on 2023-08-07 15:49.

Title

Inclusive jet cross-section in pp collisions at $\sqrt{s} = 200$ and 510 GeV

PAs

Elke Aschenauer, Zilong Chang, Renee Fatemi, Dmitry Kalinkin, Scott Wissink

Target Journal

Physical Review D

Abstract

Jets, collimated clusters of particles, produced at Relativistic Heavy Ion Collider (RHIC) are dominated by gg and qg partonic processes. In this paper, we report the differential inclusive jet cross-sections as a function of jet transverse momentum, pT, and pseudo-rapidity, η, at $\sqrt{s} = 200$ and 510 GeV from pp collisions at the STAR experiment, with kinematic reach of $0.07 < x_{\text{T}}{} = \frac{2p_{\text{T}}{}}{\sqrt{s}} < 0.5$ and 0.02 < xT < 0.32, respectively. The jet pT is corrected for underlying event contribution by using off-axis cone technique. These results will further constrain the gluon parton distribution function in the proton, tune Monte Carlo generators and provide critical reference data needed to study the quark-gluon plasma at STAR.

References

Past presentations

pp200:

pp510:

Figures

Jet spectra as a function of reconstructed detector jet pT from Jet Patch exclusive triggered sample.
Jet spectra as a function of reconstructed detector jet pT from Jet Patch exclusive triggered sample. The spectra from the simulation are scaled to the sampled luminosities for each trigger during data taking.
$f_{h} = \frac{E_{\text{clust.}}}{p}$ distribution for tracks with positive charge and negative charge between data and simulation.

$\frac{p_{\text{T};\text{detector}}}{p_{\text{T},\text{particle}}}$ at various particle jet pT bins from the embedding sample where the corresponding detector jets must satisfy the exclusive JP0 trigger for the lowest pT bin, exclusive JP1 for intermediate and exclusive JP2 for the highest pT. Left plot is for $\sqrt{s}=200$ GeV and right plot is for 510 GeV.
Hadronization correction factor at $\sqrt{s} = 200$ and 510 GeV.
Jet cross-section predicted by Pythia 6 and Pythia 8 taken in a ratio to the present measurements at $\sqrt{s} = 200$ GeV (on the left) and at $\sqrt{s} = 510$ GeV (on the right).
Ratio of jet cross-section calculated from pQCD at NNLO with hadronization correction applied to cross-section from the present measurements at $\sqrt{s} = 200$ GeV (on the left) and at $\sqrt{s} = 510$ GeV (on the right).
$\frac{1}{2\pi}p^3_T\frac{d^2\sigma}{dp_Td\eta}$ vs. xT compared with NNLO pQCD calculations after hadronization corrections and Pythia 6 with STAR tune.

Tables

Systematics: pp200

Systematics: pp510

Results: pp200

Double differential inclusive jet cross-section at $\sqrt{s} = 200$ GeV.
|η| (pT − ΔpTUE), GeV $\dfrac{\sigma}{\Delta p_T\:\Delta \eta} \pm \delta_{\text{stat.}} \pm \delta_{\text{syst.}}$
0.0 – 0.5 6.9 – 8.2 5.46 ± 0.02 ± 0.50 × 106
8.2 – 9.7 1.91 ± 0.01 ± 0.17 × 106
9.7 – 11.5 7.20 ± 0.03 ± 0.81 × 105
11.5 – 13.6 2.40 ± 0.01 ± 0.21 × 105
13.6 – 16.1 9.76 ± 0.05 ± 0.91 × 104
16.1 – 19.0 3.03 ± 0.02 ± 0.32 × 104
19.0 – 22.5 1.02 ± 0.01 ± 0.10 × 104
22.5 – 26.6 2.95 ± 0.04 ± 0.17 × 103
26.6 – 31.4 8.32 ± 0.18 ± 1.74 × 102
31.4 – 37.2 1.98 ± 0.08 ± 0.11 × 102
37.2 – 44.0 3.81 ± 0.30 ± 0.77 × 101
44.0 – 52.0 5.28 ± 0.86 ± 1.05 × 100
0.5 – 0.9 6.9 – 8.2 4.86 ± 0.02 ± 0.42 × 106
8.2 – 9.7 1.68 ± 0.01 ± 0.20 × 106
9.7 – 11.5 6.07 ± 0.03 ± 0.74 × 105
11.5 – 13.6 2.26 ± 0.01 ± 0.30 × 105
13.6 – 16.1 7.86 ± 0.05 ± 0.58 × 104
16.1 – 19.0 2.73 ± 0.02 ± 0.25 × 104
19.0 – 22.5 7.83 ± 0.10 ± 0.87 × 103
22.5 – 26.6 2.28 ± 0.04 ± 0.23 × 103
26.6 – 31.4 5.06 ± 0.18 ± 0.53 × 102
31.4 – 37.2 1.21 ± 0.07 ± 0.17 × 102
37.2 – 44.0 1.60 ± 0.25 ± 0.22 × 101
44.0 – 52.0 1.14 ± 0.61 ± 0.63 × 100

Results: pp510

Double differential inclusive jet cross-section at $\sqrt{s} = 510$ GeV.
|η|< 0.5
Bin (GeV/c) $\frac{\mathrm{d}\sigma^2}{\mathrm{d}p_{\text{T}}\mathrm{d}\eta}$ ± stat.(%) ± syst. (%)
8.0, 10.0 1.16e+07 ± 0.2% ± 9.8 %
10.0, 13.0 3.11e+06 ± 0.1% ± 6.9 %
13.0, 17.0 7.65e+05 ± 0.2% ± 7.4 %
17.0, 21.0 2.02e+05 ± 0.4% ± 9.5 %
21.0, 26.0 6.89e+04 ± 0.3% ± 5.8 %
26.0, 32.0 1.95e+04 ± 0.4% ± 8.4 %
32.0, 39.0 5.45e+03 ± 0.7% ± 10.8 %
39.0, 47.0 1.55e+03 ± 1.1% ± 12.1 %
47.0, 57.0 434 ± 1.5% ± 15.6 %
57.0, 68.0 99.2 ± 4.0% ± 23.9 %
68.0, 80.0 30.4 ± 4.1% ± 28.4 %
0.5 < |η|< 0.9
Bin (GeV/c) $\frac{\mathrm{d}\sigma^2}{\mathrm{d}p_{\text{T}}\mathrm{d}\eta}$ ± stat.(%) ± syst. (%)
8.0, 10.0 1.02e+07 ± 0.3% ± 10.5 %
10.0, 13.0 2.83e+06 ± 0.2% ± 7.0 %
13.0, 17.0 6.99e+05 ± 0.3% ± 7.5 %
17.0, 21.0 1.98e+05 ± 0.5% ± 9.9 %
21.0, 26.0 5.87e+04 ± 0.4% ± 5.4 %
26.0, 32.0 1.75e+04 ± 0.6% ± 9.1 %
32.0, 39.0 5.01e+03 ± 0.9% ± 12.0 %
39.0, 47.0 1.38e+03 ± 1.4% ± 13.5 %
47.0, 57.0 349 ± 2.1% ± 16.4 %
57.0, 68.0 93.4 ± 4.5% ± 27.1 %
68.0, 80.0 18.1 ± 6.9% ± 28.4 %
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