Evolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at √sNN=2.76 TeV

被引：11

作者：

Adam, J. ^{[54
]}

Adamova, D. ^{[101
]}

Aggarwal, M. M. ^{[105
]}

Rinella, G. Aglieri ^{[50
]}

Agnello, M. ^{[43
,44
,129
]}

Agrawal, N. ^{[63
]}

Ahammed, Z. ^{[153
]}

Ahmad, S. ^{[22
]}

Ahn, S. U. ^{[85
]}

Aiola, S. ^{[157
]}

Akindinov, A. ^{[70
]}

Alam, S. N. ^{[153
]}

Albuquerque, D. S. D. ^{[140
]}

Aleksandrov, D. ^{[97
]}

Alessandro, B. ^{[129
]}

Alexandre, D. ^{[120
]}

Alfaro Molina, R. ^{[80
]}

Alici, A. ^{[14
,15
,123
]}

Alkin, A. ^{[3
]}

Alme, J. ^{[26
,52
]}

Alt, T. ^{[57
]}

Altinpinar, S. ^{[26
]}

Altsybeev, I. ^{[152
]}

Alves Garcia Prado, C. ^{[139
]}

An, M. ^{[8
]}

Andrei, C. ^{[95
]}

Andrews, H. A. ^{[120
]}

Andronic, A. ^{[115
,116
]}

Anguelov, V. ^{[8
,111
]}

Anson, C. ^{[104
]}

Anticic, T. ^{[117
]}

Antinori, F. ^{[126
]}

Antonioli, P. ^{[123
]}

Anwar, R. ^{[142
]}

Aphecetche, L. ^{[132
]}

Appelshaeuser, H. ^{[76
]}

Arcelli, S. ^{[35
,36
]}

Arnaldi, R. ^{[129
]}

Arnold, O. W. ^{[51
,112
]}

Arsene, I. C. ^{[25
]}

Arslandok, M. ^{[76
]}

Audurier, B. ^{[132
]}

Augustinus, A. ^{[50
]}

Averbeck, R. ^{[115
,116
]}

Azmi, M. D. ^{[22
]}

Badala, A. ^{[125
]}

Baek, Y. W. ^{[84
]}

Bagnasco, S. ^{[129
]}

Bailhache, R. ^{[76
]}

Bala, R. ^{[108
]}

机构：

[1] Yerevan Phys Inst, AI Alikhanyan Natl Sci Lab Fdn, Yerevan, Armenia

[2] Benemerita Univ Autonoma Puebla, Puebla, Mexico

[3] Bogolyubov Inst Theoret Phys, Kiev, Ukraine

[4] Bose Inst, Dept Phys, Kolkata, India

[5] CAPSS, Kolkata, India

[6] Budker Inst Nucl Phys, Novosibirsk, Russia

[7] California Polytech State Univ, San Luis Obispo, CA 93407 USA

[8] Cent China Normal Univ, Wuhan, Hubei, Peoples R China

[9] Ctr Calcul IN2P3, Lyon, France

[10] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba

[11] Ctr Invest Energet Medioambient & Tecnol CIEMAT, Madrid, Spain

[12] Ctr Invest Estudios Avanzados CINVESTAV, Mexico City, DF, Mexico

[13] Ctr Invest Estudios Avanzados CINVESTAV, Merida, Mexico

[14] Ctr Fermi Museo Stor Fis, Rome, Italy

[15] Ctr & Ric Enrico Fermi, Rome, Italy

[16] Chicago State Univ, Chicago, IL 60628 USA

[17] China Inst Atom Energy, Beijing, Peoples R China

[18] Commissariat Energie Atom, IRFU, Saclay, France

[19] COMSATS Inst Informat Technol CIIT, Islamabad, Pakistan

[20] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela, Spain

[21] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[22] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India

[23] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA

[24] Sejong Univ, Dept Phys, Seoul, South Korea

[25] Univ Oslo, Dept Phys, Oslo, Norway

[26] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[27] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy

[28] Sezione Ist Nazl Fis Nucl, Rome, Italy

[29] Univ Cagliari, Dipartimento Fis, Cagliari, Italy

[30] Sezione Ist Nazl Fis Nucl, Cagliari, Italy

[31] Univ Trieste, Dipartimento Fis, Trieste, Italy

[32] Sezione Ist Nazl Fis Nucl, Trieste, Italy

[33] Univ Turin, Dipartimento Fis, Turin, Italy

[34] Sezione Ist Nazl Fis Nucl, Turin, Italy

[35] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

[36] Sezione Ist Nazl Fis Nucl, Bologna, Italy

[37] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[38] Sezione Ist Nazl Fis Nucl, Catania, Italy

[39] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[40] Sezione Ist Nazl Fis Nucl, Padua, Italy

[41] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy

[42] Grp Collegato INFN, Salerno, Italy

[43] Politecn Torino, Dipartimento DISAT, Turin, Italy

[44] Sezione Ist Nazl Fis Nucl, Turin, Italy

[45] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy

[46] INFN Sez Torino, Alessandria, Italy

[47] Dipartimento Interateneo Fis M Merlin, Bari, Italy

[48] Sezione Ist Nazl Fis Nucl, Bari, Italy

[49] Lund Univ, Div Expt High Energy Phys, Lund, Sweden

[50] European Org Nucl Res CERN, Geneva, Switzerland

来源：

PHYSICAL REVIEW C | 2017年 / 96卷 / 03期

基金：

新加坡国家研究基金会; 英国科学技术设施理事会; 美国能源部; 巴西圣保罗研究基金会; 美国国家科学基金会; 瑞典研究理事会; 日本学术振兴会; 中国国家自然科学基金;

关键词：

TRANSVERSE-MOMENTUM; ROOT-S-NN=2.76 TEV; ANISOTROPIC FLOW; SUPPRESSION; DEPENDENCE; PP;

D O I：

10.1103/PhysRevC.96.034904

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In two-particle angular correlation measurements, jets give rise to a near-side peak, formed by particles associated to a higher-p(T) trigger particle. Measurements of these correlations as a function of pseudorapidity (Delta eta) and azimuthal (Delta phi) differences are used to extract the centrality and p(T) dependence of the shape of the near-side peak in the p(T) range 1 < p(T) < 8 GeV/c in Pb-Pb and pp collisions at root s(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 phi 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(T) region and vanishes above 4 GeV/c. The widths measured in peripheral collisions are equal to those in pp collisions in the Delta phi direction and above 3 GeV/c in the Delta eta direction. Furthermore, for the 10% most central collisions and 1 < p(T, assoc) < 2 GeV/c, 1 < p(T,trig) < 3 GeV/c, a departure from a Gaussian shape is found: a depletion develops around the center of the peak. The results are compared to A Multi-Phase Transport (AMPT) model simulation as well as other theoretical calculations indicating that the broadening and the development of the depletion are connected to the strength of radial and longitudinal flow.

引用

页数：18

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