Measurements of inclusive and differential cross-sections of $t\bar{t}\gamma$ production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

The ATLAS collaboration
JHEP 10 (2024) 191, 2024.

Abstract (data abstract)
CERN-LHC-ATLAS. Inclusive and differential cross-sections are measured at particle level for the associated production of a top-quark pair and a photon ($t\bar{t}\gamma$). The analysis is performed using an integrated luminosity of 140 fb$^{−1}$ at a centre-of-mass energy of 13 TeV collected using the ATLAS detector. The measurements are performed in the single-lepton and dilepton top-quark pair decay channels focusing on $t\bar{t}\gamma$ topologies where the photon is radiated from an initial-state parton or one of the top quarks. The photon transverse momentum differential distribution is used to set limits on effective field theory parameters related to the electroweak dipole moments of the top quark. The combined limits using the photon and the $Z$-boson transverse momentum measured in $t\bar{t}$ production in associations with a $Z$ boson are also set. The fiducial region in single-lepton (dilepton) channel is defined as: - Exactly one (two) electron or muon with p$_{\text{T}} > 25$ GeV and $|\eta| < 2.5$ which do not originate from hadron decays. Events are rejected if there are additional leptons with $p_{ ext{T}} > 7$ GeV. - Exactly one photon with E$_{\text{T}} > 20$ GeV and $|\eta| < 2.37$, and the sum of transverse momenta of all charged particles surrounding the photon within $\Delta R = 0.2$ is less than 5% of its own p$_\text{T}$. - $\geq$ four (two) jets, which have p$_{\text{T}} > 25$ GeV and $|\eta| < 2.5$. Jets are clustered with the anti-$k_t$ algorithm with a radius parameter of $R = 0.4$. All stable particles are considered in the clustering, except for the selected electrons, muons and photons, and the neutrinos originating from the top quarks. - $\geq$ 1 b-tagged jet. A jet is identified as a b-jet if a hadron with p$_T > 5$ GeV containing a b-quark is matched to the jet through a ghost-matching method. - Muons and electrons within $\Delta R < 0.4$ from a jet are excluded. - Jets within $\Delta R = 0.4$ of an isolated photon candidate are excluded. - Events must satisfy $\Delta R(\gamma,l) > 0.4$, where $l$ is the electron or muon. The full likelihood is provided for both inclusive and differential cross-section measurements in pyhf [1] JSON format and HS3[2] JSON format. [1] pyhf format: https://github.com/scikit-hep/pyhf [2] HS3 format: https://github.com/hep-statistics-serialization-standard/hep-statistics-serialization-standard/tree/master

  • Table of Contents

    Table of Contents

    10.17182/hepdata.146899.v1/t1

    All the entries of this HEP data record are listed. Figure and Table numbers are the same as in the...

  • $t\bar{t}\gamma$ production cross-sections

    Results shown in Section 9.1

    10.17182/hepdata.146899.v1/t2

    Measured $t\bar{t}\gamma$ production fiducial inclusive cross-sections in both decay channels and in the combination.

  • Table 3

    Table 3

    10.17182/hepdata.146899.v1/t3

    Summary of the impact of the systematic uncertainties on the $t\bar{t}\gamma$ production fiducial inclusive cross-section in the single-lepton and dilepton...

  • Total $t\bar{t}\gamma$ production and decay cross-sections

    Results shown in Section 9.2

    10.17182/hepdata.146899.v1/t4

    Measured total $t\bar{t}\gamma$ production and decay fiducial inclusive cross-sections in both decay channels and in the combination.

  • Table 10

    Table 10

    10.17182/hepdata.146899.v1/t5

    Summary of the impact of the systematic uncertainties on the $t\bar{t}\gamma$ fiducial inclusive cross-section in the single-lepton and dilepton channels...

  • Figure 8 (a)

    Figure 8

    10.17182/hepdata.146899.v1/t6

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 8 (b)

    Figure 8

    10.17182/hepdata.146899.v1/t7

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 8 (c)

    Figure 8

    10.17182/hepdata.146899.v1/t8

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 8 (d)

    Figure 8

    10.17182/hepdata.146899.v1/t9

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 8 (e)

    Figure 8

    10.17182/hepdata.146899.v1/t10

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 8 (f)

    Figure 8

    10.17182/hepdata.146899.v1/t11

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $\Delta...

  • Figure 9 (a)

    Figure 9

    10.17182/hepdata.146899.v1/t12

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 9 (b)

    Figure 9

    10.17182/hepdata.146899.v1/t13

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 9 (c)

    Figure 9

    10.17182/hepdata.146899.v1/t14

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 9 (d)

    Figure 9

    10.17182/hepdata.146899.v1/t15

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 9 (e)

    Figure 9

    10.17182/hepdata.146899.v1/t16

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 9 (f)

    Figure 9

    10.17182/hepdata.146899.v1/t17

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $\Delta...

  • Figure 10 (a)

    Figure 10

    10.17182/hepdata.146899.v1/t18

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in the combined fiducial phase space of the single-lepton and dilepton channels as a...

  • Figure 10 (b)

    Figure 10

    10.17182/hepdata.146899.v1/t19

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in the combined fiducial phase space of the single-lepton and dilepton channels as a...

  • Figure 10 (c)

    Figure 10

    10.17182/hepdata.146899.v1/t20

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in the combined fiducial phase space of the single-lepton and dilepton channels as a...

  • Figure 10 (d)

    Figure 10

    10.17182/hepdata.146899.v1/t21

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in the combined fiducial phase space of the single-lepton and dilepton channels as a...

  • Figure 12 (a)

    Figure 12

    10.17182/hepdata.146899.v1/t22

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 12 (b)

    Figure 12

    10.17182/hepdata.146899.v1/t23

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 12 (c)

    Figure 12

    10.17182/hepdata.146899.v1/t24

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 12 (d)

    Figure 12

    10.17182/hepdata.146899.v1/t25

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 12 (e)

    Figure 12

    10.17182/hepdata.146899.v1/t26

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 12 (f)

    Figure 12

    10.17182/hepdata.146899.v1/t27

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (a)

    Figure 13

    10.17182/hepdata.146899.v1/t28

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (b)

    Figure 13

    10.17182/hepdata.146899.v1/t29

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (c)

    Figure 13

    10.17182/hepdata.146899.v1/t30

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (d)

    Figure 13

    10.17182/hepdata.146899.v1/t31

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (e)

    Figure 13

    10.17182/hepdata.146899.v1/t32

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 13 (f)

    Figure 13

    10.17182/hepdata.146899.v1/t33

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 14 (a)

    Figure 14

    10.17182/hepdata.146899.v1/t34

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 14 (b)

    Figure 14

    10.17182/hepdata.146899.v1/t35

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 14 (c)

    Figure 14

    10.17182/hepdata.146899.v1/t36

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 14 (d)

    Figure 14

    10.17182/hepdata.146899.v1/t37

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 14 (e)

    Figure 14

    10.17182/hepdata.146899.v1/t38

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 14 (f)

    Figure 14

    10.17182/hepdata.146899.v1/t39

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 15 (a)

    Figure 15

    10.17182/hepdata.146899.v1/t40

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 15 (b)

    Figure 15

    10.17182/hepdata.146899.v1/t41

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 15 (c)

    Figure 15

    10.17182/hepdata.146899.v1/t42

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 15 (d)

    Figure 15

    10.17182/hepdata.146899.v1/t43

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 22 (a)

    Figure 22

    10.17182/hepdata.146899.v1/t44

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $p_T(\gamma)$....

  • Figure 22 (b)

    Figure 22

    10.17182/hepdata.146899.v1/t45

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $p_T(\gamma)$....

  • Figure 22 (c)

    Figure 22

    10.17182/hepdata.146899.v1/t46

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $|\eta(\gamma)|$.

  • Figure 22 (d)

    Figure 22

    10.17182/hepdata.146899.v1/t47

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $|\eta(\gamma)|$.

  • Figure 22 (e)

    Figure 22

    10.17182/hepdata.146899.v1/t48

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $p_T(j_1)$....

  • Figure 22 (f)

    Figure 22

    10.17182/hepdata.146899.v1/t49

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the single-lepton channel as a function of the $p_T(j_1)$....

  • Figure 23 (a)

    Figure 23

    10.17182/hepdata.146899.v1/t50

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $p_T(\gamma)$....

  • Figure 23 (b)

    Figure 23

    10.17182/hepdata.146899.v1/t51

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $p_T(\gamma)$....

  • Figure 23 (c)

    Figure 23

    10.17182/hepdata.146899.v1/t52

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $|\eta(\gamma)|$.

  • Figure 23 (d)

    Figure 23

    10.17182/hepdata.146899.v1/t53

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $|\eta(\gamma)|$.

  • Figure 23 (e)

    Figure 23

    10.17182/hepdata.146899.v1/t54

    Absolute $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $p_T(j_1)$....

  • Figure 23 (f)

    Figure 23

    10.17182/hepdata.146899.v1/t55

    Normalised $t\bar{t}\gamma$ production differential cross-sections measured in fiducial phase space in the dilepton channel as a function of the $p_T(j_1)$....

  • Figure 24 (a)

    Figure 24

    10.17182/hepdata.146899.v1/t56

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 24 (b)

    Figure 24

    10.17182/hepdata.146899.v1/t57

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 24 (c)

    Figure 24

    10.17182/hepdata.146899.v1/t58

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 24 (d)

    Figure 24

    10.17182/hepdata.146899.v1/t59

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 24 (e)

    Figure 24

    10.17182/hepdata.146899.v1/t60

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 24 (f)

    Figure 24

    10.17182/hepdata.146899.v1/t61

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the single-lepton channel as...

  • Figure 25 (a)

    Figure 25

    10.17182/hepdata.146899.v1/t62

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 25 (b)

    Figure 25

    10.17182/hepdata.146899.v1/t63

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 25 (c)

    Figure 25

    10.17182/hepdata.146899.v1/t64

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 25 (d)

    Figure 25

    10.17182/hepdata.146899.v1/t65

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 25 (e)

    Figure 25

    10.17182/hepdata.146899.v1/t66

    Absolute differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Figure 25 (f)

    Figure 25

    10.17182/hepdata.146899.v1/t67

    Normalised differential cross-section of the total $t\bar{t}\gamma$ production and decay measured in fiducial phase space in the dilepton channel as...

  • Table 7

    Table 7

    10.17182/hepdata.146899.v1/t68

    Observed and expected 68% and 95% credible intervals on $C/\Lambda^2\ [\text{TeV}^{-2} ]$ for the $C_{tW}$ operators and $C_{tB}$ obtained from...

  • Table 8

    Table 8

    10.17182/hepdata.146899.v1/t69

    Observed and expected 68% and 95% credible intervals on $C/\Lambda^2\ [\text{TeV}^{-2} ]$ for the $C_{tW}$ operators and $C_{tB}$ obtained from...

  • Figure 11 (a)

    Figure 11

    10.17182/hepdata.146899.v1/t70

    Contributions of the systematic uncertainties grouped in categories in each bin of the measurement of the absolute $t\bar{t}\gamma$ production differential...

  • Figure 11 (b)

    Figure 11

    10.17182/hepdata.146899.v1/t71

    Contributions of the systematic uncertainties grouped in categories in each bin of the measurement of the absolute $t\bar{t}\gamma$ production differential...

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