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High-statistics study of neutral-pion pair production in two-photon collisions

The Belle collaboration
Phys.Rev. D79 (2009) 052009, 2009

Abstract (data abstract)
KEK-KEKB Collider. Measurement of the differentialand total cross sections for PI0 PI0 production in two-photon collisions in the W range from 0.6 to 4.1 GeV and range ofabsolute(cos(theta*)) less than 0.8. The data sample comes from 223 pb-1 of E+ E- interactions around the Upsilon region(179 fb-1 at 10.58 GeV, 19 fb-1 at 10.52 GeV, 2.9 fb-1 at 10.36 GeV, 0.3 fb-1 at 10.30 GeV and 21.7 fb-1 at 10.86 GeV). The data at the different energies are combined introducing an error of less than 0.5% on the cross sections.These data supercede the cross sections presented in the theprevious Belle paper on PI0 PI0 production (PR D78(2008)052004)representing an increase in the integrated luminosity by almost a factor of 3. Numerical values supplied by S Uehara.

  • Table 1

    Data from F 7

    10.17182/hepdata.52161.v1/t1

    Differential cross section for W = 0.61, 0.63 and 0.65 GeV.

  • Table 2

    Data from F 7

    10.17182/hepdata.52161.v1/t2

    Differential cross section for W = 0.67, 0.69 and 0.71 GeV.

  • Table 3

    Data from F 7

    10.17182/hepdata.52161.v1/t3

    Differential cross section for W = 0.73, 0.75 and 0.77 GeV.

  • Table 4

    Data from F 7

    10.17182/hepdata.52161.v1/t4

    Differential cross section for W = 0.79, 0.81 and 0.83 GeV.

  • Table 5

    Data from F 7

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    Differential cross section for W = 0.85, 0.87 and 0.89 GeV.

  • Table 6

    Data from F 7

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    Differential cross section for W = 0.91, 0.93 and 0.95 GeV.

  • Table 7

    Data from F 7

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    Differential cross section for W = 0.97, 0.99 and 1.01 GeV.

  • Table 8

    Data from F 7

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    Differential cross section for W = 1.03, 1.05 and 1.07 GeV.

  • Table 9

    Data from F 7

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    Differential cross section for W = 1.09, 1.11 and 1.13 GeV.

  • Table 10

    Data from F 7

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    Differential cross section for W = 1.15, 1.17 and 1.19 GeV.

  • Table 11

    Data from F 7

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    Differential cross section for W = 1.21, 1.23 and 1.25 GeV.

  • Table 12

    Data from F 7

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    Differential cross section for W = 1.27, 1.29 and 1.31 GeV.

  • Table 13

    Data from F 7

    10.17182/hepdata.52161.v1/t13

    Differential cross section for W = 1.33, 1.35 and 1.37 GeV.

  • Table 14

    Data from F 7

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    Differential cross section for W = 1.39, 1.41 and 1.43 GeV.

  • Table 15

    Data from F 7

    10.17182/hepdata.52161.v1/t15

    Differential cross section for W = 1.45, 1.47 and 1.49 GeV.

  • Table 16

    Data from F 7

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    Differential cross section for W = 1.51, 1.53 and 1.55 GeV.

  • Table 17

    Data from F 7

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    Differential cross section for W = 1.57, 1.59 and 1.61 GeV.

  • Table 18

    Data from F 7

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    Differential cross section for W = 1.63, 1.65 and 1.67 GeV.

  • Table 19

    Data from F 7

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    Differential cross section for W = 1.69, 1.71 and 1.73 GeV.

  • Table 20

    Data from F 7

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    Differential cross section for W = 1.75, 1.77 and 1.79 GeV.

  • Table 21

    Data from F 7

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    Differential cross section for W = 1.82, 1.86 and 1.90 GeV.

  • Table 22

    Data from F 7

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    Differential cross section for W = 1.94, 1.98 and 2.02 GeV.

  • Table 23

    Data from F 7

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    Differential cross section for W = 2.06, 2.10 and 2.14 GeV.

  • Table 24

    Data from F 7

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    Differential cross section for W = 2.18, 2.22 and 2.26 GeV.

  • Table 25

    Data from F 7

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    Differential cross section for W = 2.30, 2.34 and 2.38 GeV.

  • Table 26

    Data from F 7

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    Differential cross section for W = 2.45, 2.55 and 2.65 GeV.

  • Table 27

    Data from F 7

    10.17182/hepdata.52161.v1/t27

    Differential cross section for W = 2.75, 2.85 and 2.95 GeV.

  • Table 28

    Data from F 7

    10.17182/hepdata.52161.v1/t28

    Differential cross section for W = 3.05, 3.15 and 3.65 GeV.

  • Table 29

    Data from F 7

    10.17182/hepdata.52161.v1/t29

    Differential cross section for W = 3.75, 3.85 and 3.95 GeV.

  • Table 30

    Data from F 7

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    Differential cross section for W = 4.05 GeV.

  • Table 31

    Data from F 8

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    Total cross section for the two cos(theta*) ranges, < 0.6 and < 0.8.

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