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

The LHCb collaboration
JHEP 1706 (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$/c$.

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