pi(0) and eta meson production in proton-proton collisions at root s=8 TeV

S. Acharya; J. Adam; D. Adamova; Jan Adolfson; MM. Aggarwal; G.A. Rinella; A. Agnello; N. Agrawal; Z. Ahammed; N Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; M. Al-Turany; SN Alam; J.L.B. Alba; DSD Albuquerque; D. Aleksandrov; B. Alessandro; R. Alfaro Molina; A. Alici; A. Alkin; J. Alme; Ian Bearden; Christian Holm Christensen; Marek Chojnacki; Jens Jørgen Gaardhøje; bsm989 bsm989; Christian Alexander Bourjau; Børge Svane Nielsen; Katarina Gajdosova; You Zhou; Vojtech Pacik; Lais Ozelin de Lima Pimentel; Freja Thoresen; Shijie Zou

doi:10.1140/epjc/s10052-018-5612-8

pi(0) and eta meson production in proton-proton collisions at root s=8 TeV

S. Acharya, J. Adam, D. Adamova, Jan Adolfson, MM. Aggarwal, G.A. Rinella, A. Agnello, N. Agrawal, Z. Ahammed, N Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, SN Alam, J.L.B. Alba, DSD Albuquerque, D. Aleksandrov, B. Alessandro, R. Alfaro MolinaA. Alici, A. Alkin, J. Alme, Ian Bearden, Christian Holm Christensen, Marek Chojnacki, Jens Jørgen Gaardhøje, bsm989 bsm989, Christian Alexander Bourjau, Børge Svane Nielsen, Katarina Gajdosova, You Zhou, Vojtech Pacik, Lais Ozelin de Lima Pimentel, Freja Thoresen, Shijie Zou

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Abstract

An invariant differential cross section measurement of inclusive π⁰ and η meson production at mid-rapidity in pp collisions at s=8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π⁰ and η mesons were measured in transverse momentum ranges of 0.3<pT<35 GeV/c and 0.5<pT<35 GeV/c, respectively. Next-to-leading order perturbative QCD calculations using fragmentation functions DSS14 for the π⁰ and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/ π⁰ ratio within uncertainties. The results were also compared with PYTHIA 8.2 predictions for which the Monash 2013 tune yields the best agreement with the measured neutral meson spectra. The measurements confirm a universal behavior of the η/ π⁰ ratio seen for NA27, PHENIX and ALICE data for pp collisions from s=27.5 GeV to s=8 TeV within experimental uncertainties. A relation between the π⁰ and η production cross sections for pp collisions at s=8 TeV is given by mT scaling for pT>3.5 GeV/c. However, a deviation from this empirical scaling rule is observed for transverse momenta below pT<3.5 GeV/c in the η/ π⁰ ratio with a significance of 6.2 σ.

Originalsprog	Engelsk
Artikelnummer	263
Tidsskrift	European Physical Journal C
Vol/bind	78
Udgave nummer	3
Antal sider	26
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-018-5612-8
Status	Udgivet - 1 mar. 2018

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10.1140/epjc/s10052-018-5612-8Licens: CC BY

Acharya2018_Article_Pi0Π0AndEtaΗMesonProductionInPForlagets udgivne version, 0,98 MBLicens: CC BY

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Acharya, S., Adam, J., Adamova, D., Adolfson, J., Aggarwal, MM., Rinella, G. A., Agnello, A., Agrawal, N., Ahammed, Z., Ahmad, N., U. Ahn, S., Aiola, S., Akindinov, A., Al-Turany, M., Alam, SN., Alba, J. L. B., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., ... Zou, S. (2018). pi(0) and eta meson production in proton-proton collisions at root s=8 TeV. European Physical Journal C, 78(3), [263]. https://doi.org/10.1140/epjc/s10052-018-5612-8

Acharya, S, Adam, J, Adamova, D, Adolfson, J, Aggarwal, MM, Rinella, GA, Agnello, A, Agrawal, N, Ahammed, Z, Ahmad, N, U. Ahn, S, Aiola, S, Akindinov, A, Al-Turany, M, Alam, SN, Alba, JLB, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alfaro Molina, R, Alici, A, Alkin, A, Alme, J, Bearden, I , Christensen, CH, Chojnacki, M, Gaardhøje, JJ , bsm989, B, Bourjau, CA, Nielsen, BS, Gajdosova, K, Zhou, Y, Pacik, V, Pimentel, LODL, Thoresen, F & Zou, S 2018, 'pi(0) and eta meson production in proton-proton collisions at root s=8 TeV', European Physical Journal C, bind 78, nr. 3, 263. https://doi.org/10.1140/epjc/s10052-018-5612-8

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title = "pi(0) and eta meson production in proton-proton collisions at root s=8 TeV",

abstract = "An invariant differential cross section measurement of inclusive π0 and η meson production at mid-rapidity in pp collisions at s=8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons were measured in transverse momentum ranges of 0.30 and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/ π0 ratio within uncertainties. The results were also compared with PYTHIA 8.2 predictions for which the Monash 2013 tune yields the best agreement with the measured neutral meson spectra. The measurements confirm a universal behavior of the η/ π0 ratio seen for NA27, PHENIX and ALICE data for pp collisions from s=27.5 GeV to s=8 TeV within experimental uncertainties. A relation between the π0 and η production cross sections for pp collisions at s=8 TeV is given by mT scaling for pT>3.5 GeV/c. However, a deviation from this empirical scaling rule is observed for transverse momenta below pT<3.5 GeV/c in the η/ π0 ratio with a significance of 6.2 σ.",

author = "S. Acharya and J. Adam and D. Adamova and Jan Adolfson and MM. Aggarwal and G.A. Rinella and A. Agnello and N. Agrawal and Z. Ahammed and N Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and M. Al-Turany and SN Alam and J.L.B. Alba and DSD Albuquerque and D. Aleksandrov and B. Alessandro and {Alfaro Molina}, R. and A. Alici and A. Alkin and J. Alme and Ian Bearden and Christensen, {Christian Holm} and Marek Chojnacki and Gaardh{\o}je, {Jens J{\o}rgen} and bsm989 bsm989 and Bourjau, {Christian Alexander} and Nielsen, {B{\o}rge Svane} and Katarina Gajdosova and You Zhou and Vojtech Pacik and Pimentel, {Lais Ozelin de Lima} and Freja Thoresen and Shijie Zou",

year = "2018",

month = mar,

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doi = "10.1140/epjc/s10052-018-5612-8",

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journal = "The European Physical Journal C: Particles and Fields",

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T1 - pi(0) and eta meson production in proton-proton collisions at root s=8 TeV

AU - Acharya, S.

AU - Adam, J.

AU - Adamova, D.

AU - Adolfson, Jan

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, A.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, SN

AU - Alba, J.L.B.

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Chojnacki, Marek

AU - Gaardhøje, Jens Jørgen

AU - bsm989, bsm989

AU - Bourjau, Christian Alexander

AU - Nielsen, Børge Svane

AU - Gajdosova, Katarina

AU - Zhou, You

AU - Pacik, Vojtech

AU - Pimentel, Lais Ozelin de Lima

AU - Thoresen, Freja

AU - Zou, Shijie

PY - 2018/3/1

Y1 - 2018/3/1

N2 - An invariant differential cross section measurement of inclusive π0 and η meson production at mid-rapidity in pp collisions at s=8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons were measured in transverse momentum ranges of 0.30 and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/ π0 ratio within uncertainties. The results were also compared with PYTHIA 8.2 predictions for which the Monash 2013 tune yields the best agreement with the measured neutral meson spectra. The measurements confirm a universal behavior of the η/ π0 ratio seen for NA27, PHENIX and ALICE data for pp collisions from s=27.5 GeV to s=8 TeV within experimental uncertainties. A relation between the π0 and η production cross sections for pp collisions at s=8 TeV is given by mT scaling for pT>3.5 GeV/c. However, a deviation from this empirical scaling rule is observed for transverse momenta below pT<3.5 GeV/c in the η/ π0 ratio with a significance of 6.2 σ.

AB - An invariant differential cross section measurement of inclusive π0 and η meson production at mid-rapidity in pp collisions at s=8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons were measured in transverse momentum ranges of 0.30 and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/ π0 ratio within uncertainties. The results were also compared with PYTHIA 8.2 predictions for which the Monash 2013 tune yields the best agreement with the measured neutral meson spectra. The measurements confirm a universal behavior of the η/ π0 ratio seen for NA27, PHENIX and ALICE data for pp collisions from s=27.5 GeV to s=8 TeV within experimental uncertainties. A relation between the π0 and η production cross sections for pp collisions at s=8 TeV is given by mT scaling for pT>3.5 GeV/c. However, a deviation from this empirical scaling rule is observed for transverse momenta below pT<3.5 GeV/c in the η/ π0 ratio with a significance of 6.2 σ.

U2 - 10.1140/epjc/s10052-018-5612-8

DO - 10.1140/epjc/s10052-018-5612-8

M3 - Journal article

SN - 1434-6044

VL - 78

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 3

M1 - 263

ER -

pi(0) and eta meson production in proton-proton collisions at root s=8 TeV

Abstract

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