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Measurements of longitudinal and transverse momentum distributions for neutral pions in the forward-rapidity region with the LHCf detector

The LHCf collaboration
Phys.Rev. D94 (2016) 032007, 2016

Abstract (data abstract)
CERN-LHC. The differential cross sections for inclusive neutral pions as a function of transverse and longitudinal momentum in the very forward rapidity region have been measured at the Large Hadron Collider (LHC) with the Large Hadron Collider forward detector (LHCf) in proton-proton collisions at $\sqrt{s}=$ 2.76 and 7 TeV and in proton-lead collisions at nucleon-nucleon center-of-mass energies of $\sqrt{s_\text{NN}}=$ 5.02 TeV. Such differential cross sections in proton-proton collisions are compatible with the hypotheses of limiting fragmentation and Feynman scaling. Comparing proton-proton with proton-lead collisions, we find a sizable suppression of the production of neutral pions in the differential cross sections after subtraction of ultra-peripheral proton-lead collisions. This suppression corresponds to the nuclear modification factor value of about 0.1-0.3. The experimental measurements presented in this paper provide a benchmark for the hadronic interaction Monte Carlo simulation codes that are used for the simulation of cosmic ray air showers.

  • Table 1

    Data from Table 3

    10.17182/hepdata.74066.v1/t1

    The average $\pi^{0}$ transverse momenta for the rapidity range $8.8<y<10.6$ in $p+p$ collisions at $\sqrt{s}=2.76$ and 7 TeV and for...

  • Table 2

    Data from Table 4

    10.17182/hepdata.74066.v1/t2

    Production rate for the $\pi^{0}$ production in the rapidity range $8.8 < y < 9.0$ in $p+p$ collisions and in...

  • Table 3

    Data from Table 5

    10.17182/hepdata.74066.v1/t3

    Production rate for the $\pi^{0}$ production in the rapidity range $9.0 < y < 9.2$ in $p+p$ collisions and in...

  • Table 4

    Data from Table 6

    10.17182/hepdata.74066.v1/t4

    Production rate for the $\pi^{0}$ production in the rapidity range $9.2 < y < 9.4$ in $p+p$ collisions and in...

  • Table 5

    Data from Table 7

    10.17182/hepdata.74066.v1/t5

    Production rate for the $\pi^{0}$ production in the rapidity range $9.4 < y < 9.6$ in $p+p$ collisions and in...

  • Table 6

    Data from Table 8

    10.17182/hepdata.74066.v1/t6

    Production rate for the $\pi^{0}$ production in the rapidity range $9.6 < y < 9.8$ in $p+p$ collisions and in...

  • Table 7

    Data from Table 9

    10.17182/hepdata.74066.v1/t7

    Production rate for the $\pi^{0}$ production in the rapidity range $9.8 < y < 10.0$ in $p+p$ collisions and in...

  • Table 8

    Data from Table 10

    10.17182/hepdata.74066.v1/t8

    Production rate for the $\pi^{0}$ production in the rapidity range $10.0 < y < 10.2$ in $p+p$ collisions and in...

  • Table 9

    Data from Table 11

    10.17182/hepdata.74066.v1/t9

    Production rate for the $\pi^{0}$ production in the rapidity range $10.2 < y < 10.4$ in $p+p$ collisions and in...

  • Table 10

    Data from Table 12

    10.17182/hepdata.74066.v1/t10

    Production rate for the $\pi^{0}$ production in the rapidity range $10.4 < y < 10.6$ in $p+p$ collisions and in...

  • Table 11

    Data from Table 13

    10.17182/hepdata.74066.v1/t11

    Production rate for the $\pi^{0}$ production in the rapidity range $10.6 < y < 10.8$ in $p+p$ collisions and in...

  • Table 12

    Data from Table 14

    10.17182/hepdata.74066.v1/t12

    Production rate for the $\pi^{0}$ production in the $p_\rm{T}$ range $0.0 < p_\rm{T} < 0.2$ GeV in $p+p$ and $p+\rm{Pb}$...

  • Table 13

    Data from Table 15

    10.17182/hepdata.74066.v1/t13

    Production rate for the $\pi^{0}$ production in the $p_\rm{T}$ range $0.2 < p_\rm{T} < 0.4$ GeV in $p+p$ and $p+\rm{Pb}$...

  • Table 14

    Data from Table 16

    10.17182/hepdata.74066.v1/t14

    Production rate for the $\pi^{0}$ production in the $p_\rm{T}$ range $0.4 < p_\rm{T} < 0.6$ GeV in $p+p$ and $p+\rm{Pb}$...

  • Table 15

    Data from Table 17

    10.17182/hepdata.74066.v1/t15

    Production rate for the $\pi^{0}$ production in the $p_\rm{T}$ range $0.6 < p_\rm{T} < 0.8$ GeV in $p+p$ and $p+\rm{Pb}$...

  • Table 16

    Data from Table 18

    10.17182/hepdata.74066.v1/t16

    Production rate for the $\pi^{0}$ production in the $p_\rm{T}$ range $0.8 < p_\rm{T} < 1.0$ GeV in $p+p$ and $p+\rm{Pb}$...

  • Table 17

    Data from Table 56

    10.17182/hepdata.74066.v1/t17

    Nuclear modification factor for the $\pi^{0}$s in the rapidity ranges $-8.8>y_\rm{lab}>-9.0$, $-9.0>y_\rm{lab}>-9.2$, and $-9.2>y_\rm{lab}>-9.4$ in $p+\rm{Pb}$ collisions at $\sqrt{s_\rm{NN}}=5.02$ TeV....

  • Table 18

    Data from Table 57

    10.17182/hepdata.74066.v1/t18

    Nuclear modification factor for the $\pi^{0}$s in the rapidity ranges $-9.4>y_\rm{lab}>-9.6$, $-9.6>y_\rm{lab}>-9.8$, and $-9.8>y_\rm{lab}>-10.0$ in $p+\rm{Pb}$ collisions at $\sqrt{s_\rm{NN}}=5.02$ TeV....

  • Table 19

    Data from Table 58

    10.17182/hepdata.74066.v1/t19

    Nuclear modification factor for the $\pi^{0}$s in the rapidity ranges $-10.0>y_\rm{lab}>-10.2$, $-10.2>y_\rm{lab}>-10.4$, and $-10.4>y_\rm{lab}>-10.6$ in $p+\rm{Pb}$ collisions at $\sqrt{s_\rm{NN}}=5.02$ TeV....

  • Table 20

    Data from Table 59

    10.17182/hepdata.74066.v1/t20

    Nuclear modification factor for the $\pi^{0}$s in the rapidity ranges $-10.6>y_\rm{lab}>-10.8$ in $p+\rm{Pb}$ collisions at $\sqrt{s_\rm{NN}}=5.02$ TeV. The uncertainties include...

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