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CMS-SMP-21-009 ; CERN-EP-2023-219
Measurement of the double-differential inclusive jet cross section in proton-proton collisions at $ \sqrt{s} = $ 5.02 TeV
Submitted to J. High Energy Phys.
Abstract: The inclusive jet cross section is measured as a function of jet transverse momentum $ p_{\mathrm{T}} $ and rapidity $ y $. The measurement is performed using proton-proton collision data at $ \sqrt{s} = $ 5.02 TeV, recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 27.4$\,\text{pb}^{-1}$. The jets are reconstructed with the anti-$ k_{\mathrm{T}} $ algorithm using a distance parameter of $ R= $ 0.4, within the rapidity interval $ |y| < $ 2, and across the kinematic range 0.06 $ < p_{\mathrm{T}} < $ 1 TeV. The jet cross section is unfolded from detector to particle level using the determined jet response and resolution. The results are compared to predictions of perturbative quantum chromodynamics, calculated at both next-to-leading order and next-to-next-to-leading order. The predictions are corrected for nonperturbative effects, and presented for a variety of parton distribution functions and choices of the renormalization/factorization scales and the strong coupling $ \alpha_\mathrm{S} $.
Figures & Tables Summary References CMS Publications
Figures

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Figure 1:
Detector-level cross section obtained after merging the contributions from the three triggers, normalized to their respective integrated luminosities.

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Figure 2:
Detector-level inclusive jet cross section, differential in $ p_{\mathrm{T}} $, for the four rapidity bins, for the data (points) and the PYTHIA8 prediction (line) normalized to the total cross section of the data. The lower panels show the ratio of the two distributions. The error bars show the statistical uncertainties in the data.

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Figure 3:
Nonperturbative correction to the fixed-order QCD calculation of inclusive jet cross section, as a function of jet $ p_{\mathrm{T}} $, for the $ |y| < $ 0.5 rapidity bin. Dashed lines show the prediction of corrections using HERWIG 7 (lower line) and PYTHIA8 (upper line). The central solid line shows the average NP correction used in this analysis, with an uncertainty defined by the extreme predictions. The NP corrections are similar in shape and value for the other rapidity bins.

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Figure 4:
The covariance matrices of the observed detector-level jet $ p_{\mathrm{T}} $ for the four rapidity bins. The color scale reports the product of the effective number of jets in the respective $ p_{\mathrm{T}} $ bin combinations.

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Figure 4-a:
The covariance matrices of the observed detector-level jet $ p_{\mathrm{T}} $ for the four rapidity bins. The color scale reports the product of the effective number of jets in the respective $ p_{\mathrm{T}} $ bin combinations.

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Figure 4-b:
The covariance matrices of the observed detector-level jet $ p_{\mathrm{T}} $ for the four rapidity bins. The color scale reports the product of the effective number of jets in the respective $ p_{\mathrm{T}} $ bin combinations.

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Figure 4-c:
The covariance matrices of the observed detector-level jet $ p_{\mathrm{T}} $ for the four rapidity bins. The color scale reports the product of the effective number of jets in the respective $ p_{\mathrm{T}} $ bin combinations.

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Figure 4-d:
The covariance matrices of the observed detector-level jet $ p_{\mathrm{T}} $ for the four rapidity bins. The color scale reports the product of the effective number of jets in the respective $ p_{\mathrm{T}} $ bin combinations.

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Figure 5:
The response matrices for the four rapidity bins. Each 2D-histogram bin contains the number of pseudo-experiment jets that are generated in the particular particle-level $ p_{\mathrm{T}} $ bin and that are reconstructed in the corresponding detector-level $ p_{\mathrm{T}} $ bin.

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Figure 5-a:
The response matrices for the four rapidity bins. Each 2D-histogram bin contains the number of pseudo-experiment jets that are generated in the particular particle-level $ p_{\mathrm{T}} $ bin and that are reconstructed in the corresponding detector-level $ p_{\mathrm{T}} $ bin.

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Figure 5-b:
The response matrices for the four rapidity bins. Each 2D-histogram bin contains the number of pseudo-experiment jets that are generated in the particular particle-level $ p_{\mathrm{T}} $ bin and that are reconstructed in the corresponding detector-level $ p_{\mathrm{T}} $ bin.

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Figure 5-c:
The response matrices for the four rapidity bins. Each 2D-histogram bin contains the number of pseudo-experiment jets that are generated in the particular particle-level $ p_{\mathrm{T}} $ bin and that are reconstructed in the corresponding detector-level $ p_{\mathrm{T}} $ bin.

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Figure 5-d:
The response matrices for the four rapidity bins. Each 2D-histogram bin contains the number of pseudo-experiment jets that are generated in the particular particle-level $ p_{\mathrm{T}} $ bin and that are reconstructed in the corresponding detector-level $ p_{\mathrm{T}} $ bin.

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Figure 6:
The JEC, JER, and total systematic uncertainties in unfolded cross sections as functions of transverse momentum and rapidity. The total systematic uncertainty includes also the luminosity, jet identification and trigger efficiency uncertainties.

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Figure 7:
The unfolded measured particle-level inclusive jet cross sections as functions of jet $ p_{\mathrm{T}} $ in the four rapidity bins (markers), compared to the NLO perturbative QCD prediction (red histogram), using the CT14NLO PDF set, with $ \mu_\mathrm{R}=\mu_\mathrm{F}=H_{\mathrm{T}} $, and corrected for the NP effects. The yellow (red) band shows the experimental (theoretical) systematic uncertainty. Statistical uncertainties are included but are barely visible.

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Figure 8:
Ratios (points) of the unfolded measured cross sections to the NLO theoretical predictions, using the CT14NLO PDF set, with $ \mu = p_{\mathrm{T}} $. The vertical error bars show the statistical experimental uncertainty, the yellow band shows the systematic experimental uncertainty, the hashed red band shows the total theoretical uncertainty, and the individual sources of theoretical uncertainty are shown with colored lines.

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Figure 9:
Ratios (points) of the unfolded measured cross sections to the NLO theoretical predictions, using the CT14NLO PDF set, with $ \mu= H_{\mathrm{T}} $. The vertical error bars show the statistical experimental uncertainty, the yellow band shows the systematic experimental uncertainty, the hashed red band shows the total theoretical uncertainty, and the individual sources of theoretical uncertainty are shown with colored lines.

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Figure 10:
Ratios (points) of the unfolded measured cross sections to the NNLO theoretical predictions, using the CT14NNLO PDF set, with $ \mu=H_{\mathrm{T}} $. The vertical error bars show the statistical experimental uncertainty, the yellow band shows the systematic experimental uncertainty, the hashed red band shows the total theoretical uncertainty, and the individual sources of theoretical uncertainty are shown with colored lines.

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Figure 11:
Ratios (points) of the unfolded measured cross sections to the NNLO theoretical predictions, using the NNPDF31NNLO PDF set, with $ \alpha_\mathrm{S}(m_{{\mathrm{Z}} })= $ 0.118 and $ \mu=H_{\mathrm{T}} $. The vertical error bars show the statistical experimental uncertainty, the yellow band shows the systematic experimental uncertainty, the hashed red band shows the total theoretical uncertainty, and the individual sources of theoretical uncertainty are shown with colored lines.

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Figure 12:
The effect of $ \alpha_\mathrm{S}(m_{{\mathrm{Z}} }) $ variation. The NNLO theoretical cross section predictions using the NNPDF31NNLO PDF with $ \mu=H_{\mathrm{T}} $, calculated for different choices of $ \alpha_\mathrm{S} $ (0.108, 0.110, 0.112, 0.114, 0.116, 0.117, 0.118, 0.119, 0.120, 0.122, and 0.124), are divided by the benchmark NNLO prediction for $ \alpha_\mathrm{S} = $ 0.118 and the same choice of PDF set, $ \mu_\mathrm{R} $, and $ \mu_\mathrm{F} $. Also shown is the experimental unfolded measurement divided by the same benchmark prediction. The width of the unity line corresponds to the statistical uncertainty from the MC integration for the determination of the NNLO prediction. The error bars on the unfolded data correspond to the total experimental statistical and systematic uncertainty added in quadrature.
Tables

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Table 1:
The edges of the $ p_{\mathrm{T}} $ bins for the detector-level spectra (all rapidities) and for the particle-level spectra (per rapidity bin).
Summary
The double-differential inclusive jet cross section in proton-proton collisions at 5.02 TeV was measured in the rapidity interval $ |y| < $ 2, and for the transverse momentum range 0.06 $ < p_{\mathrm{T}} < $ 1 TeV. The achieved experimental systematic uncertainty is about 5% across most $ p_{\mathrm{T}} $ ranges for all $ |y| $. The next-to-leading order (NLO) perturbative quantum chromodynamics calculations agree better with the observations if the renormalization and factorization scales ($ \mu $) equal $ H_{\mathrm{T}} $, the scalar sum of the transverse momentum ($ p_{\mathrm{T}} $) of the partons in each event. The energy scale systematic uncertainty also increases when the scale is changed from $ \mu=p_{\mathrm{T}} $ of each jet to $ \mu=H_{\mathrm{T}} $ in the NLO case. Changing the order of the perturbative calculation from the NLO to next-to-NLO (NNLO) reduces the scale systematic uncertainty at high $ p_{\mathrm{T}} $, but increases it at low $ p_{\mathrm{T}} $. The effect of changing the scale is not very large for the NNLO calculation, and the scale systematic decreases at low $ p_{\mathrm{T}} $ when the scale is changed from $ \mu=p_{\mathrm{T}} $ to $ \mu=H_{\mathrm{T}} $. The uncertainty in the predicted cross section due to the parton distribution functions is significantly reduced by choosing the NNPDF31NNLO set. The measurement is consistent with the standard model expectation, even when the latter is determined with the low uncertainty provided by the NNLO calculation.
References
1 AFS Collaboration The jet cross section in pp interactions at $ \sqrt{s} = $ 45 GeV and its $ \sqrt{s} $ dependence PLB 123 (1983) 133
2 AFS Collaboration Direct evidence for the emergence of jets in events triggered on large transverse energy in pp collisions at $ \sqrt{s} = $ 63 GeV PLB 118 (1982) 185
3 UA1 Collaboration Hadronic jet production at the CERN proton-antiproton collider PLB 132 (1983) 214
4 UA2 Collaboration Measurement of the $ s $ dependence of jet production at the CERN $ {\rm p}\bar{{\rm p}} $ collider PLB 160 (1985) 349
5 UA1 Collaboration Measurement of the inclusive jet cross section at the CERN $ \bar{\rm p}{\rm p} $ collider PLB 172 (1986) 461
6 UA2 Collaboration Inclusive jet cross-section and a search for quark compositeness at the CERN collider PLB 257 (1991) 232
7 UA1 Collaboration Production of low transverse energy clusters in collisions at $ \sqrt{s} = {0.2-0.9} $ TeV and their interpretation in terms of QCD jets NPB 309 (1988) 405
8 CDF Collaboration Comparison of jet production in $ \bar{\rm p}{\rm p} $ collisions at $ \sqrt{s} = $ 546 GeV and 1800 GeV PRL 70 (1993) 1376
9 A. A. Bhatti Inclusive jet production at $ \sqrt{s} = $ 630 GeV and a test of scaling at CDF Annual Divisional Meeting (DPF96) of the Division of Particles and Fields of the American Physical Society, Minnesota, MN, USA, 1996
10 D0 Collaboration Ratio of jet cross sections at $ \sqrt{s} = $ 630 GeV and 1800 GeV PRL 86 (2001) 2523
11 CDF Collaboration Inclusive jet cross section in $ {\rm p}\bar{\rm p} $ collisions at $ \sqrt{s} = $ 1.8 TeV PRL 77 (1996) 438 hep-ex/9601008
12 D0 Collaboration Inclusive jet production in $ {\rm p}\bar{\rm p} $ collisions PRL 86 (2001) 1707 hep-ex/0011036
13 D0 Collaboration Measurement of the inclusive jet cross section using the $ k_{\rm T} $ algorithm in $ {\rm p}\bar{\rm p} $ collisions at $ \sqrt{s} = $ 1.96 TeV PRL 96 (2006) 122001 hep-ex/0512062
14 CDF Collaboration Measurement of the inclusive jet cross section using the $ k_{\rm T} $ algorithm in $ {\rm p}\bar{\rm p} $ collisions at $ \sqrt{s}= $ 1.96 TeV with the CDF II detector PRD 75 (2007) 092006 hep-ex/0701051
15 CDF Collaboration Measurement of the inclusive jet cross section at the Fermilab Tevatron $ {\rm p}\bar{\rm p} $ collider using a cone-based jet algorithm PRD 78 (2008) 052006 0807.2204
16 D0 Collaboration Measurement of the inclusive jet cross section in $ {\rm p}\bar{\rm p} $ collisions at $ \sqrt{s} = $ 1.96 TeV PRL 101 (2008) 062001 0802.2400
17 D0 Collaboration Measurement of the inclusive jet cross section in $ {\rm p}\bar{\rm p} $ collisions at $ \sqrt{s} = $ 1.96 TeV PRD 85 (2012) 052006 1110.3771
18 ALICE Collaboration Measurement of the inclusive differential jet cross section in pp collisions at $ \sqrt{s} = $ 2.76 TeV PLB 722 (2013) 262 1301.3475
19 ATLAS Collaboration Measurement of the inclusive jet cross section in pp collisions at $ \sqrt{s} = $ 2.76 TeV and comparison to the inclusive jet cross-section at $ \sqrt{s} = $ 7 TeV using the ATLAS detector EPJC 73 (2013) 2509 1304.4739
20 CMS Collaboration Measurement of the inclusive jet cross section in pp collisions at $ \sqrt{s} = $ 2.76 TeV EPJC 76 (2016) 265 CMS-SMP-14-017
1512.06212
21 ATLAS Collaboration Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector EPJC 71 (2011) 1512 1009.5908
22 CMS Collaboration Measurement of the inclusive jet cross section in pp collisions at $ \sqrt{s} = $ 7 TeV PRL 107 (2011) 132001 CMS-QCD-10-011
1106.0208
23 ATLAS Collaboration Measurement of inclusive jet and dijet production in pp collisions at $ \sqrt{s} = $ 7 TeV using the ATLAS detector PRD 86 (2012) 014022 1112.6297
24 CMS Collaboration Measurements of differential jet cross sections in proton-proton collisions at $ \sqrt{s} = $ 7 TeV with the CMS detector PRD 87 (2013) 112002 CMS-QCD-11-004
1212.6660
25 CMS Collaboration Measurement of the ratio of inclusive jet cross sections using the anti-$ k_{\rm T} $ algorithm with radius parameters $ {R} = $ 0.5 and 0.7 in pp collisions at $ \sqrt{s} = $ 7 TeV PRD 90 (2014) 072006 CMS-SMP-13-002
1406.0324
26 ATLAS Collaboration Measurement of the inclusive jet cross section in proton-proton collisions at $ \sqrt{s} = $ 7 TeV using 4.5 fb$ ^{-1} $ of data with the ATLAS detector JHEP 02 (2015) 153 1410.8857
27 CMS Collaboration Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at $ \sqrt{s} = $ 7 TeV EPJC 75 (2015) 288 CMS-SMP-12-028
1410.6765
28 CMS Collaboration Measurement and QCD analysis of double-differential inclusive jet cross sections in pp collisions at $ \sqrt{s} = $ 8 TeV and ratios to 2.76 and 7 TeV JHEP 03 (2017) 156 CMS-SMP-14-001
1609.05331
29 ATLAS Collaboration Measurement of the inclusive jet cross-sections in proton-proton collisions at $ \sqrt{s} = $ 8 TeV with the ATLAS detector JHEP 09 (2017) 20 1706.03192
30 CMS Collaboration Measurement of the double-differential inclusive jet cross section in proton-proton collisions at $ \sqrt{s} = $ 13 TeV EPJC 76 (2016) 451 CMS-SMP-15-007
1605.04436
31 ATLAS Collaboration Measurement of inclusive jet and dijet cross-sections in proton-proton collisions at $ \sqrt{s} = $ 13 TeV with the ATLAS detector JHEP 05 (2018) 195 1711.02692
32 CMS Collaboration Dependence of inclusive jet production on the anti-$ k_{\rm T} $ distance parameter in pp collisions at $ \sqrt{s} = $ 13 TeV JHEP 12 (2020) 82 CMS-SMP-19-003
2005.05159
33 CMS Collaboration Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at $ \sqrt{s} = $ 13 TeV JHEP 02 (2022) 142 CMS-SMP-20-011
2111.10431
34 CMS Collaboration Addendum: Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at $ \sqrt{s} = $ 13 TeV JHEP 12 (2022) 035 CMS-SMP-20-011
2111.10431
35 WA97 Collaboration Strangeness enhancement at mid-rapidity in Pb-Pb collisions at 158 A GeV$ /c $ PLB 449 (1999) 401
36 WA97 Collaboration Transverse mass spectra of strange and multi--strange particles in Pb-Pb collisions at 158 A GeV$ /c $ EPJC 14 (2000) 633
37 CMS Collaboration Evidence for collectivity in pp collisions at the LHC PLB 765 (2017) 193 CMS-HIN-16-010
1606.06198
38 CMS Collaboration First measurement of large area jet transverse momentum spectra in heavy-ion collisions JHEP 05 (2021) 284 CMS-HIN-18-014
2102.13080
39 CMS Collaboration Measurement of inclusive jet production and nuclear modifications in pPb collisions at $ \sqrt{s_{{\rm NN}}} = $ 5.02 TeV EPJC 76 (2016) 372 CMS-HIN-14-001
1601.02001
40 D. d'Enterria Jet quenching in Springer Materials - The Landolt-Börnstein Database, R. Stock, ed., volume 23: Relativistic Heavy Ion Physics, 2010
link
0902.2011
41 CMS Collaboration Measurement of the splitting function in pp and Pb-Pb collisions at $ \sqrt{{s}_{\rm NN}}= $ 5.02 TeV PRL 120 (2018) 142302 CMS-HIN-16-006
1708.09429
42 CMS Collaboration Observation of medium-induced modifications of jet fragmentation in Pb-Pb collisions at $ \sqrt{{s}_{\mathrm{NN}}}= $ 5.02 TeV using isolated photon-tagged jets PRL 121 (2018) 242301 CMS-HIN-16-014
1801.04895
43 ATLAS Collaboration Observation of a centrality-dependent dijet asymmetry in lead-lead collisions at $ \sqrt{{s}_{\mathrm{NN}}}= $ 2.76 TeV with the ATLAS detector at the LHC PRL 105 (2010) 252303 1011.6182
44 CMS Collaboration Jet momentum dependence of jet quenching in PbPb collisions at $ \sqrt{{s}_{\mathit{\text{NN}}}}= $ 2.76 TeV PLB 712 (2012) 176 CMS-HIN-11-013
1202.5022
45 CMS Collaboration HEPData record for this analysis link
46 CMS Collaboration Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV JINST 12 (2017) P02014 CMS-JME-13-004
1607.03663
47 CMS Collaboration The CMS trigger system JINST 12 (2017) P01020 CMS-TRG-12-001
1609.02366
48 CMS Collaboration Performance of the CMS Level-1 trigger in proton-proton collisions at $ \sqrt{s} = $ 13 TeV JINST 15 (2020) P10017 CMS-TRG-17-001
2006.10165
49 CMS Collaboration The CMS high level trigger EPJC 46 (2006) 605 1403.1500
50 CMS Collaboration The CMS experiment at the CERN LHC JINST 3 (2008) S08004
51 CMS Collaboration Particle-flow reconstruction and global event description with the CMS detector JINST 12 (2017) 10003 CMS-PRF-14-001
1706.04965
52 M. Cacciari, G. P. Salam, and G. Soyez The anti-$ k_{\rm T} $ jet clustering algorithm JHEP 04 (2008) 063 0802.1189
53 M. Cacciari, G. P. Salam, and G. Soyez FastJet user manual EPJC 72 (2012) 1896 1111.6097
54 CMS Collaboration Technical proposal for the Phase-II upgrade of the Compact Muon Solenoid CMS Technical Report CERN-LHCC-2015-010, CMS-TDR-15-02, 2015
CDS
55 CMS Collaboration Determination of jet energy calibration and transverse momentum resolution in CMS JINST 6 (2011) P11002 CMS-JME-10-011
1107.4277
56 T. Sj$\ddot o $strand et al. An introduction to PYTHIA 8.2 Comput. Phys. Commun. 191 (2015) 159 1410.3012
57 B. Andersson The Lund model Camb. Monogr. Part. Phys. Nucl. Phys. Cosmol. 7 (1998) 1
58 NNPDF Collaboration A determination of parton distributions with faithful uncertainty estimation NPB 809 (2009) 1 0808.1231
59 CMS Collaboration Tuning PYTHIA 8.1: the Monash 2013 tune EPJC 74 (2014) 3024 1404.5630
60 CMS Collaboration Event generator tunes obtained from underlying event and multiparton scattering measurement EPJC 76 (2016) 155 CMS-GEN-14-001
1512.00815
61 J. Bellm et al. HERWIG 7.0/HERWIG++ 3.0 release note EPJC 76 (2016) 196 1512.01178
62 NNPDF Collaboration Parton distributions from high-precision collider data EPJC 77 (2017) 663 1706.00428
63 UA1 Collaboration A QCD model for jet fragmentation including soft gluon interference NPB 238 (1984) 492
64 CMS Collaboration Extraction and validation of a set of HERWIG7 tunes from CMS underlying-event measurements EPJC 81 (2021) 312 CMS-GEN-19-001
2011.03422
65 GEANT4 Collaboration GEANT4 --- a simulation toolkit Nucl. Instrum. Methods Phys. Res. A 506 (2003) 250
66 Z. Nagy Three jet cross-sections in hadron-hadron collisions at next-to-leading order PRL 88 (2002) 122003 hep-ph/0110315
67 Z. Nagy Next-to-leading order calculation of three-jet observables in hadron-hadron collisions PRD 68 (2003) 094002 hep-ph/0307268
68 D. Britzger, K. Rabbertz, F. Stober, and M. Wobisch New features in version 2 of the fastNLO project in Proc. XX. Intern. Workshop on Deep-Inelastic Scattering and Related Subjects, Bonn, Germany, 2012
DIS 201 (2012) 217
1208.3641
69 T. Gehrmann et al. Jet cross sections and transverse momentum distributions with NNLOJET in Proc. of Science
Loops and Legs in Quantum Field Theory. 201 (1900) 8
1801.06415
70 J. Currie, E. W. N. Glover, and J. Pires Next-to-next-to leading order QCD predictions for single jet inclusive production at the LHC PRL 118 (2017) 072002 1611.01460
71 J. Currie et al. Infrared sensitivity of single jet inclusive production at hadron colliders JHEP 10 (2018) 155 1807.03692
72 D. Britzger et al. Calculations for deep inelastic scattering using fast interpolation grid techniques at NNLO in QCD and the extraction of $ \alpha_s $ from HERA data EPJC 79 (2019) 845 1906.05303
73 S. Dulat et al. New parton distribution functions from a global analysis of quantum chromodynamics PRD 93 (2016) 033006 1506.07443
74 A. Buckley et al. LHAPDF6: parton density access in the LHC precision era EPJC 75 (2015) 132 1412.7420
75 S. Schmitt TUnfold: an algorithm for correcting migration effects in high energy physics JINST 7 (2012) T10003 1205.6201
76 CMS Collaboration CMS luminosity calibration for the PbPb reference run at $ \sqrt{s} = $ 5.02 TeV CMS Physics Analysis Summary, 2016
CMS-PAS-LUM-16-001
CMS-PAS-LUM-16-001
77 CMS Collaboration Precision luminosity measurement in proton-proton collisions at $ \sqrt{s} = $ 13 TeV in 2015 and 2016 at CMS EPJC 81 (2021) 800 CMS-LUM-17-003
2104.01927
78 P. L. S. Connor and R. Žlebčík Step: a tool to perform tests of smoothness on differential distributions based on expansion of polynomials 2111.09968
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