Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions

You Zhou; Ian Bearden; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo; Christian Alexander Bourjau; Lais Ozelin de Lima Pimentel; Katarina Gajdosova; Vojtech Pacik; S. Acharya; D. Adamova; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; N Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; DSD Albuquerque; D. Aleksandrov

doi:10.1016/j.nuclphysa.2017.04.016

Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions

You Zhou, Ian Bearden, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Ante Bilandzic, Marek Chojnacki, Valentina Zaccolo, Christian Alexander Bourjau, Lais Ozelin de Lima Pimentel, Katarina Gajdosova, Vojtech Pacik, S. Acharya, D. Adamova, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. AhammedN Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, DSD Albuquerque, D. Aleksandrov

Experimental Particle Physics

1 Citation (Scopus)

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Abstract

The second and the third order anisotropic flow, V₂ and V₃, are determined by the corresponding initial spatial anisotropy coefficients, ε₂ and ε₃, in the initial density distribution. On the contrary, the higher order anisotropic flow V_n(n>3), in addition to their dependence on the same order initial anisotropy coefficient ε_n, have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this contribution, we present the investigations on linear and non-linear modes in higher order anisotropic flow (V₄, V₅ and V₆) in Pb–Pb collisions at s_NN=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). A significant contribution from a non-linear mode is observed. A new observable, the non-linear response coefficient, is measured as well. The comparison to theoretical calculations provides crucial information on dynamic of the created system especially at the freeze-out conditions, which are poorly known from previous flow measurements.

Original language	English
Journal	Nuclear Physics A
Volume	967
Pages (from-to)	377-380
ISSN	0375-9474
DOIs	https://doi.org/10.1016/j.nuclphysa.2017.04.016
Publication status	Published - Nov 2017

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Zhou, Y., Bearden, I., Christensen, C. H., Gulbrandsen, K. H., Gaardhøje, J. J., Nielsen, B. S., Bilandzic, A., Chojnacki, M., Zaccolo, V., Bourjau, C. A., Pimentel, L. O. D. L., Gajdosova, K., Pacik, V., Acharya, S., Adamova, D., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., ... Aleksandrov, D. (2017). Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions. Nuclear Physics A, 967, 377-380. https://doi.org/10.1016/j.nuclphysa.2017.04.016

Zhou, Y , Bearden, I , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ , Nielsen, BS, Bilandzic, A, Chojnacki, M, Zaccolo, V, Bourjau, CA, Pimentel, LODL, Gajdosova, K, Pacik, V, Acharya, S, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD & Aleksandrov, D 2017, 'Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions', Nuclear Physics A, vol. 967, pp. 377-380. https://doi.org/10.1016/j.nuclphysa.2017.04.016

@article{b63636f783664c1691995879afbcbfab,

title = "Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions",

abstract = "The second and the third order anisotropic flow, V2 and V3, are determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. On the contrary, the higher order anisotropic flow Vn(n>3), in addition to their dependence on the same order initial anisotropy coefficient εn, have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this contribution, we present the investigations on linear and non-linear modes in higher order anisotropic flow (V4, V5 and V6) in Pb–Pb collisions at sNN=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). A significant contribution from a non-linear mode is observed. A new observable, the non-linear response coefficient, is measured as well. The comparison to theoretical calculations provides crucial information on dynamic of the created system especially at the freeze-out conditions, which are poorly known from previous flow measurements.",

author = "You Zhou and Ian Bearden and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo and Bourjau, {Christian Alexander} and Pimentel, {Lais Ozelin de Lima} and Katarina Gajdosova and Vojtech Pacik and S. Acharya and D. Adamova and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and N Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and DSD Albuquerque and D. Aleksandrov",

year = "2017",

month = nov,

doi = "10.1016/j.nuclphysa.2017.04.016",

language = "English",

volume = "967",

pages = "377--380",

journal = "Nuclear Physics A: Nuclear and Hadronic Physics",

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T1 - Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions

AU - Zhou, You

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

AU - Bourjau, Christian Alexander

AU - Pimentel, Lais Ozelin de Lima

AU - Gajdosova, Katarina

AU - Pacik, Vojtech

AU - Acharya, S.

AU - Adamova, D.

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

PY - 2017/11

Y1 - 2017/11

N2 - The second and the third order anisotropic flow, V2 and V3, are determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. On the contrary, the higher order anisotropic flow Vn(n>3), in addition to their dependence on the same order initial anisotropy coefficient εn, have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this contribution, we present the investigations on linear and non-linear modes in higher order anisotropic flow (V4, V5 and V6) in Pb–Pb collisions at sNN=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). A significant contribution from a non-linear mode is observed. A new observable, the non-linear response coefficient, is measured as well. The comparison to theoretical calculations provides crucial information on dynamic of the created system especially at the freeze-out conditions, which are poorly known from previous flow measurements.

AB - The second and the third order anisotropic flow, V2 and V3, are determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. On the contrary, the higher order anisotropic flow Vn(n>3), in addition to their dependence on the same order initial anisotropy coefficient εn, have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this contribution, we present the investigations on linear and non-linear modes in higher order anisotropic flow (V4, V5 and V6) in Pb–Pb collisions at sNN=2.76 TeV using the ALICE detector at the Large Hadron Collider (LHC). A significant contribution from a non-linear mode is observed. A new observable, the non-linear response coefficient, is measured as well. The comparison to theoretical calculations provides crucial information on dynamic of the created system especially at the freeze-out conditions, which are poorly known from previous flow measurements.

U2 - 10.1016/j.nuclphysa.2017.04.016

DO - 10.1016/j.nuclphysa.2017.04.016

M3 - Journal article

SN - 0375-9474

VL - 967

SP - 377

EP - 380

JO - Nuclear Physics A: Nuclear and Hadronic Physics

JF - Nuclear Physics A: Nuclear and Hadronic Physics

ER -

Probing non-linearity of higher order anisotropic flow in Pb-Pb collisions

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