Neutral pion and η meson production in p–Pb collisions at √sNN = 5.02 TeV
Acharya, S ; Adolfsson, Jonatan LU ; Christiansen, Peter LU ; Ljunggren, Martin LU ; Oskarsson, Anders LU ; Richert, Tuva LU ; Silvermyr, David LU
; Stenlund, Evert
LU
; Vislavicius, Vytautas
LU
and Zou, S.
(2018)
In European Physical Journal C
78(8).
- Abstract
- Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb collisions at sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of π0 and η meson inclusive production are measured near mid-rapidity in a broad transverse momentum range of 0.3<pT<20GeV/c and 0.7<pT<20GeV/c, respectively. The measured η/ π0 ratio increases with pT and saturates for pT > 4 GeV / c at 0.483 ± 0. 015 stat± 0. 015 sys. A deviation from mT scaling is observed for pT< 2 GeV / c. The measured η/ π0 ratio is consistent with... (More)
- Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb collisions at sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of π0 and η meson inclusive production are measured near mid-rapidity in a broad transverse momentum range of 0.3<pT<20GeV/c and 0.7<pT<20GeV/c, respectively. The measured η/ π0 ratio increases with pT and saturates for pT > 4 GeV / c at 0.483 ± 0. 015 stat± 0. 015 sys. A deviation from mT scaling is observed for pT< 2 GeV / c. The measured η/ π0 ratio is consistent with previous measurements from proton-nucleus and pp collisions over the full pT range. The measured η/ π0 ratio at high pT also agrees within uncertainties with measurements from nucleus–nucleus collisions. The π0 and η yields in p–Pb relative to the scaled pp interpolated reference, RpPb, are presented for 0.3 < pT< 20 GeV / c and 0.7 < pT< 20 GeV / c, respectively. The results are compared with theoretical model calculations. The values of RpPb are consistent with unity for transverse momenta above 2 GeV / c. These results support the interpretation that the suppressed yield of neutral mesons measured in Pb–Pb collisions at LHC energies is due to parton energy loss in the hot QCD medium. © 2018, CERN for the benefit of the ALICE collaboration. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/83735ff0-e098-4fc4-8b6e-edbcdc5e1970
- author
- Acharya, S
; Adolfsson, Jonatan
LU
; Christiansen, Peter
LU
; Ljunggren, Martin
LU
; Oskarsson, Anders
LU
; Richert, Tuva
LU
; Silvermyr, David
LU
; Stenlund, Evert
LU
; Vislavicius, Vytautas
LU
and Zou, S.
- author collaboration
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C
- volume
- 78
- issue
- 8
- article number
- 624
- publisher
- Springer
- external identifiers
-
- scopus:85051224642
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-018-6013-8
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 11 September 2018
- id
- 83735ff0-e098-4fc4-8b6e-edbcdc5e1970
- date added to LUP
- 2018-09-11 13:07:24
- date last changed
- 2023-04-08 16:30:25
@article{83735ff0-e098-4fc4-8b6e-edbcdc5e1970,
abstract = {{Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb collisions at sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of π0 and η meson inclusive production are measured near mid-rapidity in a broad transverse momentum range of 0.3<pT<20GeV/c and 0.7<pT<20GeV/c, respectively. The measured η/ π0 ratio increases with pT and saturates for pT > 4 GeV / c at 0.483 ± 0. 015 stat± 0. 015 sys. A deviation from mT scaling is observed for pT< 2 GeV / c. The measured η/ π0 ratio is consistent with previous measurements from proton-nucleus and pp collisions over the full pT range. The measured η/ π0 ratio at high pT also agrees within uncertainties with measurements from nucleus–nucleus collisions. The π0 and η yields in p–Pb relative to the scaled pp interpolated reference, RpPb, are presented for 0.3 < pT< 20 GeV / c and 0.7 < pT< 20 GeV / c, respectively. The results are compared with theoretical model calculations. The values of RpPb are consistent with unity for transverse momenta above 2 GeV / c. These results support the interpretation that the suppressed yield of neutral mesons measured in Pb–Pb collisions at LHC energies is due to parton energy loss in the hot QCD medium. © 2018, CERN for the benefit of the ALICE collaboration.}},
author = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Ljunggren, Martin and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Stenlund, Evert and Vislavicius, Vytautas and Zou, S.}},
issn = {{1434-6044}},
language = {{eng}},
number = {{8}},
publisher = {{Springer}},
series = {{European Physical Journal C}},
title = {{Neutral pion and η meson production in p–Pb collisions at √sNN = 5.02 TeV}},
url = {{http://dx.doi.org/10.1140/epjc/s10052-018-6013-8}},
doi = {{10.1140/epjc/s10052-018-6013-8}},
volume = {{78}},
year = {{2018}},
}