Transverse-momentum distribution and nuclear modification factor for neutral pions in the forward-rapidity region in proton-lead collisions at s NN =5.02 TeV

O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, P. Papini, A. L. Perrot, D. PfeifferS. Ricciarini, T. Sako, N. Sakurai, T. Suzuki, T. Tamura, A. Tiberio, Shoji Torii, A. Tricomi, W. C. Turner

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    Abstract

    The transverse momentum (pT) distribution for inclusive neutral pions in the very forward rapidity region has been measured, with the Large Hadron Collider forward detector (LHCf), in proton-lead collisions at nucleon-nucleon center-of-mass energies of sNN=5.02TeV at the LHC. The pT spectra obtained in the rapidity range -11.0<ylab<-8.9 and 0<pT<0.6GeV (in the detector reference frame) show a strong suppression of the production of neutral pions after taking into account ultraperipheral collisions. This leads to a nuclear modification factor value, relative to the interpolated pT spectra in proton-proton collisions at s=5.02TeV, of about 0.1-0.4. This value is compared with the predictions of several hadronic interaction Monte Carlo simulations.

    Original languageEnglish
    Article number065209
    JournalPhysical Review C - Nuclear Physics
    Volume89
    Issue number6
    DOIs
    Publication statusPublished - 2014 Jun 23

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    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Adriani, O., Berti, E., Bonechi, L., Bongi, M., Castellini, G., D'Alessandro, R., Del Prete, M., Haguenauer, M., Itow, Y., Kasahara, K., Kawade, K., Makino, Y., Masuda, K., Matsubayashi, E., Menjo, H., Mitsuka, G., Muraki, Y., Papini, P., Perrot, A. L., ... Turner, W. C. (2014). Transverse-momentum distribution and nuclear modification factor for neutral pions in the forward-rapidity region in proton-lead collisions at s NN =5.02 TeV. Physical Review C - Nuclear Physics, 89(6), [065209]. https://doi.org/10.1103/PhysRevC.89.065209