Pseudorapidity dependence of the anisotropic flow of charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV
J. Adam
,
R. Vernet
(1)
,
I. Belikov
(2)
,
J.C. Hamon
(2)
,
B. Hippolyte
(2)
,
C. Kuhn
(2)
,
A. Maire
(2)
,
L. Molnar
(2)
,
F. Rami
(2)
,
C. Roy
(2)
,
V. Barret
(3)
,
N. Bastid
(3)
,
A. Batista Camejo
(3)
,
P. Crochet
(3)
,
P. Dupieux
(3)
,
V.J.G. Feuillard
(3)
,
S. Li
(3)
,
X. Lopez
(3)
,
F. Manso
(3)
,
S. Porteboeuf-Houssais
(3)
,
P. Rosnet
(3)
,
B. Vulpescu
(3)
,
Laurent Aphecetche
(4)
,
B. Audurier
(4)
,
Guillaume Batigne
(4)
,
B. Erazmus
(4)
,
Magali Estienne
(4)
,
A. Francisco
(4)
,
Marie Germain
(4)
,
J. Martin Blanco
(4)
,
Gines Martinez Garcia
(4)
,
A. Morreale
(4)
,
Philippe Pillot
(4)
,
L. Ronflette
(4)
,
Y. Schutz
(4)
,
Alexandre Shabetai
(4)
,
Diego Stocco
,
J. Zhu
(2)
,
C. Cheshkov
(5)
,
B. Cheynis
(5)
,
L. Ducroux
(5)
,
B. Teyssier
(5)
,
R. Tieulent
(5)
,
A. Uras
(5)
,
G. Conesa Balbastre
(6)
,
J. Faivre
(6)
,
C. Furget
(6)
,
R. Guernane
(6)
,
C. Silvestre
(6)
,
A. Vauthier
(6)
,
Z. Conesa Del Valle
(7)
,
I. Das
(7)
,
B. Espagnon
(7)
,
C. Hadjidakis
(7)
,
I. Lakomov
(7)
,
C. Suire
(7)
,
J. D. Tapia Takaki
(7)
,
M. Tarhini
(7)
,
L. Valencia Palomo
(7)
1
CC-IN2P3 -
Centre de Calcul de l'IN2P3
2 DRS-IPHC - Département Recherches Subatomiques
3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
4 SUBATECH - Laboratoire de physique subatomique et des technologies associées
5 IPNL - Institut de Physique Nucléaire de Lyon
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 IPNO - Institut de Physique Nucléaire d'Orsay
2 DRS-IPHC - Département Recherches Subatomiques
3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
4 SUBATECH - Laboratoire de physique subatomique et des technologies associées
5 IPNL - Institut de Physique Nucléaire de Lyon
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 IPNO - Institut de Physique Nucléaire d'Orsay
J. Adam
- Function : Author
C. Roy
- Function : Author
- PersonId : 742351
- IdHAL : christelle-roy
- ORCID : 0000-0001-5920-6271
Laurent Aphecetche
- Function : Author
- PersonId : 2010
- IdHAL : laurent-aphecetche
- ORCID : 0000-0001-7662-3878
- IdRef : 113847653
Guillaume Batigne
- Function : Author
- PersonId : 175820
- IdHAL : guillaume-batigne
- ORCID : 0000-0001-8638-6300
- IdRef : 077207874
B. Erazmus
- Function : Author
- PersonId : 1178907
- IdRef : 033726485
Magali Estienne
- Function : Author
- PersonId : 179790
- IdHAL : magali-estienne
- ORCID : 0000-0003-0687-5580
Marie Germain
- Function : Author
- PersonId : 170960
- IdHAL : marie-germain
- ORCID : 0000-0001-7382-1609
- IdRef : 176579958
Gines Martinez Garcia
- Function : Author
- PersonId : 169952
- IdHAL : gines-martinez
- ORCID : 0000-0002-8657-6742
- IdRef : 068952961
Philippe Pillot
- Function : Author
- PersonId : 175815
- IdHAL : ppillot
- ORCID : 0000-0002-9067-0803
Alexandre Shabetai
- Function : Author
- PersonId : 181202
- IdHAL : alexandre-shabetai
- ORCID : 0000-0003-3069-726X
Diego Stocco
- Function : Author
- PersonId : 170966
- IdHAL : diego-stocco
- ORCID : 0000-0002-5377-5163
- IdRef : 204479150
B. Cheynis
- Function : Author
- PersonId : 750577
- IdHAL : brigitte-cheynis
- IdRef : 032215606
G. Conesa Balbastre
- Function : Author
- PersonId : 737477
- IdHAL : conesa-balbastre-gustavo
- ORCID : 0000-0001-5283-3520
Abstract
We present measurements of the elliptic ($\mathrm{v}_2$), triangular ($\mathrm{v}_3$) and quadrangular ($\mathrm{v}_4$) anisotropic azimuthal flow over a wide range of pseudorapidities ($-3.5< \eta < 5$). The measurements are performed with Pb-Pb collisions at $\sqrt{s_{\text{NN}}} = 2.76$ TeV using the ALICE detector at the Large Hadron Collider (LHC). The flow harmonics are obtained using two- and four-particle correlations from nine different centrality intervals covering central to peripheral collisions. We find that the shape of $\mathrm{v}_n(\eta)$ is largely independent of centrality for the flow harmonics $n=2-4$, however the higher harmonics fall off more steeply with increasing $|\eta|$. We assess the validity of extended longitudinal scaling of $\mathrm{v}_2$ by comparing to lower energy measurements, and find that the higher harmonic flow coefficients are proportional to the charged particle densities at larger pseudorapidities. Finally, we compare our measurements to both hydrodynamical and transport models, and find they both have challenges when it comes to describing our data.