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High-$E_{\rm T}$ isolated-photon plus jets production in $pp$ collisions at $\sqrt s=$ 8 TeV with the ATLAS detector

The collaboration
Nucl.Phys. B918 (2017) 257-316, 2017

Abstract (data abstract)
CERN-LHC. Measurements of the cross section for prompt photon plus jet production in proton-proton collisions at a centre-of-mass energy of 8 TeV with 20.2/fb of data collected in 2012. The photon is required to have a transverse energy above 130 GeV and absolute value of pseudorapity |etaGamma|<2.37, excluding the region 1.37<|etaGamma|<1.56. The photon isolation is ensured by requiring the transverse energy around a cone of radius R=0.4 around the photon to be less than 10 GeV. At particle level it is the sum of transverse energy from all particles, except for muons, neutrinos and the photon itself. At parton level it is the sum of energy from all coloured partons. Jets are reconstructed using the anti-kt algorithm with radius parameter R=0.6 and required to have the jet rapidity in the range |yjet|<4.4 and the distance between the jet and the photon DeltaR(gamma jet)>1. The requirements on the jet transverse momenta depend on the sample and are as follows. Photon+1jet sample (tables 1 and 2): pTjet1 > 100 GeV. Photon+1jet sample (tables 3 to 13): pTjet1 > 100 GeV, |yjet1| < 2.37, |costhetastar| < 0.83 and |etaGamma + yjet1| < 2.37 and mgammajet1 > 467 GeV. Photon+2jet sample (tables 14 to 17): pTjet1 > 100 GeV and pTjet2 > 65 GeV. Photon+2jet sample (tables 18 and 20): pTjet1 > 100 GeV, pTjet2 > 65 GeV and 130 < ETGamma < 300 GeV. Photon+2jet sample (tables 19 and 21): pTjet1 > 100 GeV, pTjet2 > 65 GeV and ETGamma > 300 GeV. Photon+2jet sample (table 22): pTjet1 > 130 GeV, pTjet2 > 50 GeV, Delta R(gamma jet1) > 3, 1 < Delta R(jet1 jet2) < 1.5 and |etajet1| < 2.37. Photon+2jet sample (table 23): pTjet1 > 130 GeV, pTjet2 > 50 GeV, Delta R(gamma jet1) > 3, 1 < Delta R(gamma jet2) < 1.5, |etajet1| < 2.37 and pTjet2 < ETGamma. Photon+2jet sample (table 24): ratio of cross sections in tables 22 and 23. Photon+3jet sample (tables 25 to 29): pTjet1 > 100 GeV, pTjet2 > 65 GeV and pTjet3 > 50 GeV. Photon+3jet sample (tables 30, 32 and 34): pTjet1 > 100 GeV, pTjet2 > 65 GeV, pTjet3 > 50 GeV and 130 < ETGamma < 300 GeV. Photon+3jet sample (tables 31, 33 and 35): pTjet1 > 100 GeV, pTjet2 > 65 GeV, pTjet3 > 50 GeV and ETGamma > 300 GeV.

• #### Table 1

Data from Figures 3a and 4a

10.17182/hepdata.79948.v1/t1

Measured cross sections for isolated-photon plus 1jet production as a function of $E_{\rm T}^{\gamma}$.

• #### Table 2

Data from Figures 3b and 4b

10.17182/hepdata.79948.v1/t2

Measured cross sections for isolated-photon plus 1jet production as a function of $p_{\rm T}^{\rm jet1}$.

• #### Table 3

Data from Figures 3c and 4c

10.17182/hepdata.79948.v1/t3

Measured cross sections for isolated-photon plus 1jet production as a function of $m^{\gamma-\rm jet1}$.

• #### Table 4

Data from Figures 3d and 4d

10.17182/hepdata.79948.v1/t4

Measured cross sections for isolated-photon plus 1jet production as a function of $|\cos\theta^{\star}|$.

• #### Table 5

Data from Figures 5a, 6a and 7a

10.17182/hepdata.79948.v1/t5

• #### Table 7

Data from Figures 5c, 6c and 7c

10.17182/hepdata.79948.v1/t7

• #### Table 9

Data from Figures 5e, 6e and 7e

10.17182/hepdata.79948.v1/t9

• #### Table 11

Data from Figures 5g, 6g and 7g

10.17182/hepdata.79948.v1/t11

• #### Table 13

Data from Figures 5i, 6i and 7i

10.17182/hepdata.79948.v1/t13

• #### Table 19

Data from Figures 10b and 11b

10.17182/hepdata.79948.v1/t19

Measured cross sections for isolated-photon plus 2jet production as a function of $\Delta\phi^{\rm \gamma-jet2}$ for the range $E_{\rm T}^{\gamma} >300$...

• #### Table 20

Data from Figures 10c and 11c

10.17182/hepdata.79948.v1/t20

• #### Table 31

Data from Figures 15b and 16b

10.17182/hepdata.79948.v1/t31

Measured cross sections for isolated-photon plus 3jet production as a function of $\Delta\phi^{\rm \gamma-jet3}$ for the range $E_{\rm T}^{\gamma} >300$...

• #### Table 32

Data from Figures 15c and 16c

10.17182/hepdata.79948.v1/t32

• #### Table 35

Data from Figures 15f and 16f

10.17182/hepdata.79948.v1/t35

Measured cross sections for isolated-photon plus 3jet production as a function of $\Delta\phi^{\rm jet2-jet3}$ for the range $E_{\rm T}^{\gamma} >300$...