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Measurement of the J/$\psi$ pair production cross-section in pp collisions at $\sqrt{s}=13$ TeV

The collaboration
JHEP 06 (2017) 047, 2017.

Abstract (data abstract)
CERN-LHC. The production cross-section of $J/\psi$ pairs is measured using a data sample of $pp$ collisions collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s} = 13$ TeV, corresponding to an integrated luminosity of $279 \pm 11 {\mathrm{pb^{-1}}}$. The measurement is performed for $J/\psi$ mesons with a transverse momentum of less than 10 GeV$/c$ in the rapidity range $2.0<y<4.5$. The production cross-section is measured to be $15.2 \pm 1.0 \pm 0.9$ nb. The first uncertainty is statistical, and the second is systematic. The differential cross-sections as functions of several kinematic variables of the $J/\psi$ pair are measured and compared to theoretical predictions. In the differential cross-section distributions only the statistical uncertainties are shown as the systematic ones are negligibly small and almost 100% correlated.

• #### Table 1

Data from Figure 2;

10.17182/hepdata.79484.v1/t1

Differential cross-section of $J/\psi$ pair as a function of $p_{T}(J/\psi J/\psi)$.

• #### Table 2

Data from Figure 3a;

10.17182/hepdata.79484.v1/t2

Differential cross-section of $J/\psi$ pair as a function of $p_{T}(J/\psi)$.

• #### Table 3

Data from Figure 3b;

10.17182/hepdata.79484.v1/t3

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi J/\psi)$.

• #### Table 4

Data from Figure 3c;

10.17182/hepdata.79484.v1/t4

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi)$.

• #### Table 5

Data from Figure 4a;

10.17182/hepdata.79484.v1/t5

Differential cross-section of $J/\psi$ pair as a function of $|\Delta y|$.

• #### Table 6

Data from Figure 4b;

10.17182/hepdata.79484.v1/t6

Differential cross-section of $J/\psi$ pair as a function of $|\Delta \phi|$.

• #### Table 7

Data from Figure 4c;

10.17182/hepdata.79484.v1/t7

Differential cross-section of $J/\psi$ pair as a function of $\mathcal{A}_{\mathrm{T}}$.

• #### Table 8

Data from Figure 4d;

10.17182/hepdata.79484.v1/t8

Differential cross-section of $J/\psi$ pair as a function of $M(J/\psi J/\psi)$.

• #### Table 9

Data from Figure 5a;

10.17182/hepdata.79484.v1/t9

Differential cross-section of $J/\psi$ pair as a function of $p_{T}(J/\psi)$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 10

Data from Figure 5b;

10.17182/hepdata.79484.v1/t10

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi J/\psi)$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 11

Data from Figure 5c;

10.17182/hepdata.79484.v1/t11

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi)$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 12

Data from Figure 6a;

10.17182/hepdata.79484.v1/t12

Differential cross-section of $J/\psi$ pair as a function of $|\Delta y|$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 13

Data from Figure 6b;

10.17182/hepdata.79484.v1/t13

Differential cross-section of $J/\psi$ pair as a function of $|\Delta \phi|$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 14

Data from Figure 6c;

10.17182/hepdata.79484.v1/t14

Differential cross-section of $J/\psi$ pair as a function of $\mathcal{A}_{\mathrm{T}}$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 15

Data from Figure 6d;

10.17182/hepdata.79484.v1/t15

Differential cross-section of $J/\psi$ pair as a function of $M(J/\psi J/\psi)$ for $p_{T}(J/\psi J/\psi)>1$ GeV$/c$.

• #### Table 16

Data from Figure 7a;

10.17182/hepdata.79484.v1/t16

Differential cross-section of $J/\psi$ pair as a function of $p_{T}(J/\psi)$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 17

Data from Figure 7b;

10.17182/hepdata.79484.v1/t17

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi J/\psi)$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 18

Data from Figure 7c;

10.17182/hepdata.79484.v1/t18

Differential cross-section of $J/\psi$ pair as a function of $y(J/\psi)$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 19

Data from Figure 8a;

10.17182/hepdata.79484.v1/t19

Differential cross-section of $J/\psi$ pair as a function of $|\Delta y|$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 20

Data from Figure 8b;

10.17182/hepdata.79484.v1/t20

Differential cross-section of $J/\psi$ pair as a function of $|\Delta \phi|$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 21

Data from Figure 8c;

10.17182/hepdata.79484.v1/t21

Differential cross-section of $J/\psi$ pair as a function of $\mathcal{A}_{\mathrm{T}}$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.

• #### Table 22

Data from Figure 8d;

10.17182/hepdata.79484.v1/t22

Differential cross-section of $J/\psi$ pair as a function of $M(J/\psi J/\psi)$ for $p_{T}(J/\psi J/\psi)>3$ GeV$/c$.