| Article | |
| Report number | arXiv:1507.08764 ; CERN-PH-EP-2015-201 ; CERN-PH-EP-2015-201 |
| Title | Measurements of longitudinal and transverse momentum distributions for neutral pions in the forward-rapidity region with the LHCf detector |
| Author(s) |
Adriani, O. (INFN, Florence ; Florence U.) ; Berti, E. (INFN, Florence ; Florence U.) ; Bonechi, L. (INFN, Florence) ; Bongi, M. (INFN, Florence ; Florence U.) ; D'Alessandro, R. (INFN, Florence ; Florence U.) ; Del Prete, M. (INFN, Florence ; Florence U.) ; Haguenauer, M. (Ec. Polytech., Palaiseau (main)) ; Itow, Y. (Nagoya U., Solar-Terrestrial Environ. Lab. ; KMI, Nagoya) ; Iwata, T. (Waseda U., RISE) ; Kasahara, K. (Waseda U., RISE) ; Kawade, K. (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Makino, Y. (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Masuda, K. (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Matsubayashi, E. (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Menjo, H. (Nagoya U.) ; Mitsuka, G. (Florence U.) ; Muraki, Y. (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Papini, P. (INFN, Florence) ; Perrot, A.L. (CERN) ; Ricciarini, S. (INFN, Florence ; IFAC, Florence) ; Sako, T. (Nagoya U., Solar-Terrestrial Environ. Lab. ; KMI, Nagoya) ; Sakurai, N. (KMI, Nagoya) ; Suzuki, T. (Waseda U., RISE) ; Tamura, T. (Kanagawa U.) ; Tiberio, A. (INFN, Florence ; Florence U.) ; Torii, S. (Waseda U., RISE) ; Tricomi, A. (INFN, Catania ; Catania U.) ; Turner, W.C. (LBL, Berkeley) ; Ueno, M. (KMI, Nagoya) ; Zhou, Q.D. (Nagoya U., Solar-Terrestrial Environ. Lab.) |
| Publication | 2016-08-22 |
| Imprint | 31 Jul 2015 |
| Number of pages | 38 |
| Note | 47 pages, 23 figures, 59 tables, accepted in PRD |
| In: | Phys. Rev. D 94 (2016) 032007 |
| DOI | 10.1103/PhysRevD.94.032007 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; LHCf |
| Free keywords | forward physics ; minimum bias ; experimental results |
| Abstract | The transverse and longitudinal momentum distributions for inclusive neutral pions in the very forward rapidity region have been measured with the Large Hadron Collider forward detector 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 at the LHC. Such momentum distributions in proton-proton collisions are compatible with the hypotheses of limiting fragmentation and Feynman scaling. A sizable suppression of the production of neutral pions, after taking into account ultraperipheral collisions, is found in the transverse and longitudinal momentum distributions obtained in proton-lead collisions. This leads to a strong 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 simulations codes that are used for the simulation of air showers. |
| Copyright/License | preprint: © 2015-2025 CERN (License: CC-BY-4.0) publication: © 2015-2025 CERN (License: CC-BY-3.0) |
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