Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV

S. Acharya; D. Adamova; Rolf Adolfsson; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; S.U. Ahn; S. Aiola; A. Akindinov; M. Al-Turany; SN Alam; DSD Albuquerque; D. Aleksandrov; B Alessandro; Rafael A. Molina; Yusuf Ali; A. Alici; A. Alkin; J. Alme; T. Alt; Ian Bearden; Christian Alexander Bourjau; Marek Chojnacki; bsm989 bsm989; Jens Jørgen Gaardhøje; Christian Holm Christensen; Lais Ozelin De Lima Pimentel; Katarina Gajdosova; Freja Thoresen; You Zhou; Børge Svane Nielsen; The ALICE collaboration

doi:10.1140/epjc/s10052-019-6711-x

Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV

S. Acharya, D. Adamova, Rolf Adolfsson, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, SN Alam, DSD Albuquerque, D. Aleksandrov, B Alessandro, Rafael A. Molina, Yusuf Ali, A. Alici, A. AlkinJ. Alme, T. Alt, Ian Bearden, Christian Alexander Bourjau, Marek Chojnacki, bsm989 bsm989, Jens Jørgen Gaardhøje, Christian Holm Christensen, Lais Ozelin De Lima Pimentel, Katarina Gajdosova, Freja Thoresen, You Zhou, Børge Svane Nielsen, The ALICE collaboration

Experimental Particle Physics

8 Citations (Scopus)

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Abstract

First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν _dyn , which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p / π show a change of sign in ν _dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and ν _dyn exhibits a change in sign for p / π and K/p.

Original language	English
Journal	European Physical Journal C
Volume	79
Issue number	3
Number of pages	14
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-019-6711-x
Publication status	Published - 1 Mar 2019

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Acharya, S., Adamova, D., Adolfsson, R., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S. U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R. A., Ali, Y., Alici, A., ... The ALICE collaboration (2019). Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV. European Physical Journal C, 79(3). https://doi.org/10.1140/epjc/s10052-019-6711-x

Acharya, S, Adamova, D, Adolfsson, R, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU, Aiola, S, Akindinov, A, Al-Turany, M, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, RA, Ali, Y, Alici, A, Alkin, A, Alme, J, Alt, T, Bearden, I, Bourjau, CA, Chojnacki, M, bsm989, B , Gaardhøje, JJ , Christensen, CH, Ozelin De Lima Pimentel, L, Gajdosova, K, Thoresen, F, Zhou, Y , Nielsen, BS & The ALICE collaboration 2019, 'Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV', European Physical Journal C, vol. 79, no. 3. https://doi.org/10.1140/epjc/s10052-019-6711-x

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title = "Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV",

abstract = " First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν dyn , which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p / π show a change of sign in ν dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and ν dyn exhibits a change in sign for p / π and K/p. ",

author = "S. Acharya and D. Adamova and Rolf Adolfsson and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and S.U. Ahn and S. Aiola and A. Akindinov and M. Al-Turany and SN Alam and DSD Albuquerque and D. Aleksandrov and B Alessandro and Molina, {Rafael A.} and Yusuf Ali and A. Alici and A. Alkin and J. Alme and T. Alt and Ian Bearden and Bourjau, {Christian Alexander} and Marek Chojnacki and bsm989 bsm989 and Gaardh{\o}je, {Jens J{\o}rgen} and Christensen, {Christian Holm} and {Ozelin De Lima Pimentel}, Lais and Katarina Gajdosova and Freja Thoresen and You Zhou and Nielsen, {B{\o}rge Svane} and {The ALICE collaboration}",

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doi = "10.1140/epjc/s10052-019-6711-x",

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AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, Rolf

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S.U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B

AU - Molina, Rafael A.

AU - Ali, Yusuf

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Bearden, Ian

AU - Bourjau, Christian Alexander

AU - Chojnacki, Marek

AU - bsm989, bsm989

AU - Gaardhøje, Jens Jørgen

AU - Christensen, Christian Holm

AU - Ozelin De Lima Pimentel, Lais

AU - Gajdosova, Katarina

AU - Thoresen, Freja

AU - Zhou, You

AU - Nielsen, Børge Svane

AU - The ALICE collaboration

PY - 2019/3/1

Y1 - 2019/3/1

N2 - First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν dyn , which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p / π show a change of sign in ν dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and ν dyn exhibits a change in sign for p / π and K/p.

AB - First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν dyn , which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p / π show a change of sign in ν dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and ν dyn exhibits a change in sign for p / π and K/p.

U2 - 10.1140/epjc/s10052-019-6711-x

DO - 10.1140/epjc/s10052-019-6711-x

M3 - Journal article

SN - 1434-6044

VL - 79

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV

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