Journal articles
Evolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV
J. Adam
Laurent Aphecetche
1
B. Audurier
1
A. Baldisseri
2
Guillaume Batigne
1
J. Castillo Castellanos
2
J.L. Charvet
2
C. Cheshkov
3
B. Cheynis
3
L. Ducroux
3
B. Erazmus
1
Magali Estienne
1
V.J.G. Feuillard
2
A. Francisco
1
Marie Germain
1
B. Hippolyte
4
A. Lardeux
2
A. Morreale
1
H. Pereira Da Costa
2
Philippe Pillot
1
L. Ronflette
1
Y. Schutz
1
Alexandre Shabetai
1
Diego Stocco
1
B. Teyssier
3
R. Tieulent
3
R. Vernet
5
J. Zhu
1
G. Conesa Balbastre
6
J. Faivre
6
C. Furget
6
R. Guernane
6
C. Silvestre
6
A. Vauthier
6
H. Yokoyama
6
V. Barret
7
N. Bastid
7
A. Batista Camejo
7
P. Crochet
7
P. Dupieux
7
X. Lopez
7
F. Manso
7
S. Porteboeuf-Houssais
7
P. Rosnet
7
Z. Conesa Del Valle
8
I. Das
8
B. Espagnon
8
C. Hadjidakis
8
I. Lakomov
8
C. Suire
8
J. D. Tapia Takaki
8
M. Tarhini
8
L. Valencia Palomo
8
J. Adam
Author
Laurent Aphecetche 1
Author IdHAL : laurent-aphecetche IdRef : https://www.idref.fr/113847653 ORCID : https://orcid.org/0000-0001-7662-3878
B. Audurier 1
Author
A. Baldisseri 2
Author
Guillaume Batigne 1
Author IdHAL : guillaume-batigne ORCID : https://orcid.org/0000-0001-8638-6300
J. Castillo Castellanos 2
Author
J.L. Charvet 2
Author
C. Cheshkov 3
Author
B. Cheynis 3
Author
L. Ducroux 3
Author
B. Erazmus 1
Author
Magali Estienne 1
Author IdHAL : magali-estienne arXiv : https://arxiv.org/a/estienne ORCID : https://orcid.org/0000-0003-0687-5580
V.J.G. Feuillard 2
Author
A. Francisco 1
Author
Marie Germain 1
Author IdHAL : marie-germain ORCID : https://orcid.org/0000-0001-7382-1609
B. Hippolyte 4
Author
A. Lardeux 2
Author
A. Morreale 1
Author
H. Pereira Da Costa 2
Author
Philippe Pillot 1
Author IdHAL : ppillot ORCID : https://orcid.org/0000-0002-9067-0803
L. Ronflette 1
Author
Y. Schutz 1
Author
Alexandre Shabetai 1
Author IdHAL : alexandre-shabetai ORCID : https://orcid.org/0000-0003-3069-726X
Diego Stocco 1
Author IdHAL : diego-stocco ORCID : https://orcid.org/0000-0002-5377-5163
G. Conesa Balbastre 6
Author IdHAL : conesa-balbastre-gustavo arXiv : https://arxiv.org/a/gconesab ORCID : https://orcid.org/0000-0001-5283-3520
J. Faivre 6
Author
C. Furget 6
Author
R. Guernane 6
Author
L. Valencia Palomo 8
Author
1
SUBATECH - Laboratoire SUBATECH Nantes (4, rue Alfred Kastler - 44070 Nantes Cedex 03 - France)
- Mines Nantes - Mines Nantes (La Chantrerie - 4, rue Alfred Kastler - BP 20722 - 44307 Nantes cedex 3 - France)
- UN - Université de Nantes (1, quai de Tourville - BP 13522 - 44035 Nantes cedex 1 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR6457 (France)
2
IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (CEA Saclay
F-91191 Gif sur Yvette cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
3
IPNL - Institut de Physique Nucléaire de Lyon (Campus LyonTech-la Doua
Bâtiment Paul DIRAC
4 Rue Enrico Fermi
69622 Villeurbanne Cedex - France)
- UCBL - Université Claude Bernard Lyon 1 (43, boulevard du 11 novembre 1918, 69622 Villeurbanne cedex - France)
- Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5822 (France)
4
IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
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- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
5
CC-IN2P3 - Centre de Calcul de l'IN2P3 (Domaine scientifique de La Doua
43 bd du 11 Novembre 1918
69622 Villeurbanne Cedex - France)
6
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- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology (46 avenue Félix Viallet 38031 Grenoble Cedex 1 - France)
- UGA [2016-2019] - Université Grenoble Alpes [2016-2019] (CS 40700 - 38058 Grenoble cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5821 (France)
7
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand (Campus des Cézeaux, 24 avenue des Landais, BP 80026, 63171 Aubière Cedex - France)
- UBP - Université Blaise Pascal - Clermont-Ferrand 2 (34, avenue Carnot - BP 185 / 63006 Clermont-Ferrand cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR6533 (France)
8
IPNO - Institut de Physique Nucléaire d'Orsay (IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX - France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR8608 (France)
Abstract : In two-particle angular correlation measurements, jets give rise to a near-side peak, formed by particles associated to a higher $p_{\mathrm{T}}$ trigger particle. Measurements of these correlations as a function of pseudorapidity ($\Delta\eta$) and azimuthal ($\Delta\varphi$) differences are used to extract the centrality and $p_{\mathrm{T}}$ dependence of the shape of the near-side peak in the $p_{\mathrm{T}}$ range $1 < p_{\mathrm{T}} <$ 8 GeV/c in Pb-Pb and pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV. A combined fit of the near-side peak and long-range correlations is applied to the data and the peak shape is quantified by the variance of the distributions. While the width of the peak in the $\Delta\varphi$ direction is almost independent of centrality, a significant broadening in the $\Delta\eta$ direction is found from peripheral to central collisions. This feature is prominent for the low $p_{\mathrm{T}}$ region and vanishes above 4 GeV/c. The widths measured in peripheral collisions are equal to those in pp in the $\Delta\varphi$ direction and above 3 GeV/c in the $\Delta\eta$ direction. Furthermore, for the 10\% most central collisions and $1 < p_{\mathrm{T, assoc}} <$ 2 GeV/c, $1 < p_{\mathrm{T, trig}} <$ 3 GeV/c a departure from a Gaussian shape is found: a depletion develops around the centre of the peak. The results are compared to AMPT model simulations as well as other theoretical calculations indicating that the broadening and the development of the depletion is connected to the strength of radial and longitudinal flow.
Document type :
Journal articles
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http://hal.in2p3.fr/in2p3-01370109
Contributor : Sylvie Flores <>
Submitted on : Thursday, September 22, 2016 - 7:02:16 AM
Last modification on : Thursday, February 25, 2021 - 10:58:35 AM
Contributor : Sylvie Flores <>
Submitted on : Thursday, September 22, 2016 - 7:02:16 AM
Last modification on : Thursday, February 25, 2021 - 10:58:35 AM
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- HAL Id : in2p3-01370109, version 1
- ARXIV : 1609.06667
- DOI : 10.1103/PhysRevC.96.034904
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IN2P3 | CNRS | DSM-IRFU | DRS-IPHC | IPHC | UNIV-NANTES | CEA | SUBATECH | CEA-UPSAY | LPSC | LPC-CLERMONT | PRES_CLERMONT | IPNO | UNIV-LYON1 | CEA-DRF | SITE-ALSACE | IMT-ATLANTIQUE | SUBATECH-PLASMA | IP2I | UDL | UGA
Citation
J. Adam, Laurent Aphecetche, B. Audurier, A. Baldisseri, Guillaume Batigne, et al.. Evolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. Physical Review C, American Physical Society, 2017, 96, pp.034904. ⟨10.1103/PhysRevC.96.034904⟩. ⟨in2p3-01370109⟩
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