Neutral pion(pi(0)) and eta meson production cross sections were measured up to unprecedentedly high transverse momenta (p(T)) in p-Pb collisions at root s(NN) = 8.16 TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval -1.3 < y < 0.3 in the ranges of 0.4 < p(T) < 200 GeV/cand 1.0 < p(T) < 50 GeV/c, respectively. The respective nuclear modification factor (R-pPb) is presented for p(T) up to of 200 and 30 GeV/c, where the former was achieved by extending the pi(0) measurement in pp collisions at root s = 8 TeV using the merged cluster technique. The values of R-pPb are below unity for p(T) < 10 GeV/c, while they are consistent with unity for p(T) > 10 GeV/c, leaving essentially no room for final state energy loss. The new data provide strong constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at root s(NN) = 5.02 TeV. (c) 2022 European Organization for Nuclear Research. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).

Nuclear modification factor of light neutral-meson spectra up to high transverse momentum in p-Pb collisions at root S-NN=8.16 TeV

Alessandro, B.;Alici, A.;Angeletti, M.;Aziz, S.;Banerjee, D.;Baruffaldi, F.;Basu, S.;Bearden, I. G.;Bellini, F.;Biswas, S.;Bruno, G. E.;Caffarri, D.;Colella, D.;Contin, G.;Das, P.;Das, P.;Dash, S.;De Caro, A.;De Falco, A.;Deb, S.;Evans, D.;Faggin, M.;Faivre, J.;Ghosh, P.;Giacalone, M.;Giubilato, P.;Harris, J. W.;Janik, M. A.;Jung, J.;Kim, J. S.;Kundu, S.;Lee, J.;Lunardon, M.
Membro del Collaboration Group
;
Martinez M.;Micheletti, L.;Pagano, D.;Pazzini, J.;Rehman, A.;Richter, M.;Riggi, F.;Rotondi, A.;Roy, A.;Rui, R.;Sharma, A.;Sinha, T.;Soramel, F.;Stocco, D.;Swain, S.;Szarka, I;Terrevoli, C.;Thomas, D.;Trogolo, S.;Trombetta, G.;Turrisi, R.;Uras, A.;Vercellin, E.;Wagner, B.;Wang, C.;Wright, J. R.;Wu, W.;Zhou, Y.;Zhu, J.;
2022

Abstract

Neutral pion(pi(0)) and eta meson production cross sections were measured up to unprecedentedly high transverse momenta (p(T)) in p-Pb collisions at root s(NN) = 8.16 TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval -1.3 < y < 0.3 in the ranges of 0.4 < p(T) < 200 GeV/cand 1.0 < p(T) < 50 GeV/c, respectively. The respective nuclear modification factor (R-pPb) is presented for p(T) up to of 200 and 30 GeV/c, where the former was achieved by extending the pi(0) measurement in pp collisions at root s = 8 TeV using the merged cluster technique. The values of R-pPb are below unity for p(T) < 10 GeV/c, while they are consistent with unity for p(T) > 10 GeV/c, leaving essentially no room for final state energy loss. The new data provide strong constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at root s(NN) = 5.02 TeV. (c) 2022 European Organization for Nuclear Research. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3468238
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 7
social impact