☆ 4.5 Article

Directed flow in ultrarelativistic heavy-ion collisions

PHYSICAL REVIEW C (2010)

Journal

PHYSICAL REVIEW C

Volume 81, Issue 5, Pages -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.81.054902

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Physics, Nuclear

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Polish Ministry of Science and Higher Education [N202 034 32/0918, N N202 263438]

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Abstract

We study the generation of the directed flow in the hydrodynamic expansion of hot matter formed in ultrarelativistic heavy-ion collisions at root s = 200 GeV. The experimentally observed negative-directed flow in a wide range of central pseudorapidities is reproduced, assuming that the fireball is tilted away from the collision axis. The tilt of the source is consistent with a preferential emission in the forward-backward hemisphere from forward-backward participating nucleons. The model reproduces the experimentally observed scaling of the directed flow when going from Au-Au to Cu-Cu systems.

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Sarkar, P. Sarma, V. M. Sarti, M. H. P. Sas, J. Schambach, H. S. Scheid, C. Schiaua, R. Schicker, A. Schmah, C. Schmidt, H. R. Schmidt, M. O. Schmidt, M. Schmidt, N. V. Schmidt, A. R. Schmier, R. Schotter, J. Schukraft, Y. Schutz, K. Schwarz, K. Schweda, G. Scioli, E. Scomparin, J. E. Seger, Y. Sekiguchi, D. Sekihata, I. Selyuzhenkov, S. Senyukov, J. J. Seo, D. Serebryakov, L. Serksnyte, A. Sevcenco, A. Shabanov, A. Shabetai, R. Shahoyan, W. Shaikh, A. Shangaraev, A. Sharma, H. Sharma, M. Sharma, N. Sharma, S. Sharma, O. Sheibani, A. I. Sheikh, K. Shigaki, M. Shimomura, S. Shirinkin, Q. Shou, Y. Sibiriak, S. Siddhanta, T. Siemiarczuk, T. F. D. Silva, D. Silvermyr, G. Simatovic, G. Simonetti, B. Singh, R. Singh, R. Singh, R. Singh, V. K. Singh, V. Singhal, T. Sinha, B. Sitar, M. Sitta, T. B. Skaali, G. Skorodumovs, M. Slupecki, N. Smirnov, R. J. M. Snellings, C. Soncco, J. Song, A. Songmoolnak, F. Soramel, S. Sorensen, I. Sputowska, J. Stachel, I. Stan, P. J. Steffanic, S. F. Stiefelmaier, D. Stocco, M. M. Storetvedt, C. P. Stylianidis, A. A. P. Suaide, T. Sugitate, C. Suire, M. Suljic, R. Sultanov, M. Sumbera, V. Sumberia, S. Sumowidagdo, S. Swain, A. Szabo, I. Szarka, U. Tabassam, S. F. Taghavi, G. Taillepied, J. Takahashi, G. J. Tambave, S. Tang, Z. Tang, M. Tarhini, M. G. Tarzila, A. Tauro, G. Tejeda Munoz, A. Telesca, L. Terlizzi, C. Terrevoli, G. Tersimonov, S. Thakur, D. Thomas, R. Tieulent, A. Tikhonov, A. R. Timmins, M. Tkacik, A. Toia, N. Topilskaya, M. Toppi, F. Torales-Acosta, S. R. Torres, A. Trifiro, S. Tripathy, T. Tripathy, S. Trogolo, G. Trombetta, V. Trubnikov, W. H. Trzaska, T. P. Trzcinski, B. A. Trzeciak, A. Tumkin, R. Turrisi, T. S. Tveter, K. Ullaland, E. N. Umaka, A. Uras, M. Urioni, G. L. Usai, M. Vala, N. Valle, S. Vallero, N. van der Kolk, L. V. R. van Doremalen, M. van Leeuwen, P. Vande Vyvre, D. Varga, Z. Varga, M. Varga-Kofarago, A. Vargas, M. Vasileiou, A. Vasiliev, O. Vazquez Doce, V. Vechernin, E. Vercellin, S. Vergara Limon, L. Vermunt, R. Vertesi, M. Verweij, L. Vickovic, Z. Vilakazi, O. Villalobos Baillie, G. Vino, A. Vinogradov, T. Virgili, V. Vislavicius, A. Vodopyanov, B. Volkel, M. A. Volkl, K. Voloshin, S. A. Voloshin, G. Volpe, B. von Haller, I. Vorobyev, D. Voscek, J. Vrlakova, B. Wagner, M. Weber, A. Wegrzynek, S. C. Wenzel, J. P. Wessels, J. Wiechula, J. Wikne, G. Wilk, J. Wilkinson, G. A. Willems, E. Willsher, B. Windelband, M. Winn, W. E. Witt, J. R. Wright, Y. Wu, R. Xu, S. Yalcin, Y. Yamaguchi, K. Yamakawa, S. Yang, S. Yano, Z. Yin, H. Yokoyama, I. -K. Yoo, J. H. Yoon, S. Yuan, A. Yuncu, V. Yurchenko, V. Zaccolo, A. Zaman, C. Zampolli, H. J. C. Zanoli, N. Zardoshti, A. Zarochentsev, P. Zavada, N. Zaviyalov, H. Zbroszczyk, M. Zhalov, S. Zhang, X. Zhang, Y. Zhang, V. Zherebchevskii, Y. Zhi, D. Zhou, Y. Zhou, J. Zhu, Y. Zhu, A. Zichichi, G. Zinovjev, N. Zurlo

Summary: The study reveals new event-by-event correlations between different three-harmonic flow amplitudes in Pb-Pb collisions, which provide new and independent constraints for the initial conditions and system properties of nuclear matter created in heavy-ion collisions.

PHYSICAL REVIEW LETTERS (2021)

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Article Astronomy & Astrophysics

Polarization as a signature of local parity violation in hot QCD matter

F. Becattini, M. Buzzegoli, A. Palermo, G. Prokhorov

Summary: In this study, a method for measuring chirality imbalance in relativistic nuclear collisions using the helicity of final state baryons is proposed. The method does not require coupling to the electromagnetic field like the Chiral Magnetic Effect. It is shown that in the presence of chirality imbalance, spin 1/2 baryons and anti-baryons receive an additional contribution to their polarization along their momentum direction, which can be detected through studying azimuthal angular correlation.

PHYSICS LETTERS B (2021)

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Article Physics, Multidisciplinary

Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au plus Au Collisions at √SNN=200 GeV

M. S. Abdallah, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I Aggarwal, M. M. Aggarwal, Z. Ahammed, I Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V Bairathi, W. Baker, J. G. Ball Cap, K. Barish, A. Behera, R. Bellwied, P. Bhagat, A. Bhasin, J. Bielcik, J. Bielcikova, I. G. Bordyuzhin, J. D. Brandenburg, A. Brandin, I Bunzarov, J. Butterworth, X. Z. Cai, H. Caines, M. Calderon de la Barca Sanchez, D. Cebra, I Chakaberia, P. Chaloupka, B. K. Chan, F-H Chang, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, D. Chen, J. Chen, J. H. Chen, X. Chen, Z. Chen, J. Cheng, M. Chevalier, S. Choudhury, W. Christie, X. Chu, H. J. Crawford, M. Csanad, M. Daugherity, T. G. Dedovich, I. M. Deppner, A. A. Derevschikov, A. Dhamija, L. Di Carlo, L. Didenko, X. Dong, J. L. Drachenberg, J. C. Dunlop, N. Elsey, J. Engelage, G. Eppley, S. Esumi, A. Ewigleben, O. Eyser, R. Fatemi, F. M. Fawzi, S. Fazio, P. Federic, J. Fedorisin, C. J. Feng, Y. Feng, P. Filip, E. Finch, Y. Fisyak, A. Francisco, C. Fu, L. Fulek, C. A. Gagliardi, T. Galatyuk, F. Geurts, N. Ghimire, A. Gibson, K. Gopal, X. Gou, D. Grosnick, A. Gupta, W. Guryn, A. Hamad, A. Hamed, Y. Han, S. Harabasz, M. D. Harasty, J. W. Harris, H. Harrison, S. He, W. He, X. H. He, Y. He, S. Heppelmann, S. Heppelmann, N. Herrmann, E. Hoffman, L. Holub, Y. Hu, H. Huang, H. Z. Huang, S. L. Huang, T. Huang, X. Huang, Y. Huang, T. J. Humanic, G. Igo, D. Isenhower, W. W. Jacobs, C. Jena, A. Jentsch, Y. Ji, J. Jia, K. Jiang, X. Ju, E. G. Judd, S. Kabana, M. L. Kabir, S. Kagamaster, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, Y. Khyzhniak, C. Kim, B. Kimelman, D. Kincses, I Kisel, A. Kiselev, A. G. Knospe, L. Kochenda, L. K. Kosarzewski, L. Kramarik, P. Kravtsov, L. Kumar, S. Kumar, R. Kunnawalkam Elayavalli, J. H. Kwasizur, S. Lan, J. M. Landgraf, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, Y. H. Leung, C. Li, C. Li, W. Li, X. Li, Y. Li, X. Liang, Y. Liang, R. Licenik, T. Lin, Y. Lin, M. A. Lisa, F. Liu, H. Liu, H. Liu, P. Liu, T. Liu, X. Liu, Y. Liu, Z. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, E. Loyd, N. S. Lukow, X. Luo, L. Ma, R. Ma, Y. G. Ma, N. Magdy, R. Majka, D. Mallick, S. Margetis, C. Markert, H. S. Matis, J. A. Mazer, N. G. Minaev, S. Mioduszewski, B. Mohanty, M. M. Mondal, I Mooney, D. A. Morozov, A. Mukherjee, M. Nagy, J. D. Nam, Md Nasim, K. Nayak, D. Neff, J. M. Nelson, D. B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, R. Nishitani, L. Nogach, T. Nonaka, A. S. Nunes, G. Odyniec, A. Ogawa, S. Oh, V. A. Okorokov, B. S. Page, R. Pak, A. Pandav, A. K. Pandey, Y. Panebratsev, P. Parfenov, B. Pawlik, D. Pawlowska, H. Pei, C. Perkins, L. Pinsky, R. L. Pinter, J. Pluta, B. R. Pokhrel, G. Ponimatkin, J. Porter, M. Posik, V Prozorova, N. K. Pruthi, M. Przybycien, J. Putschke, H. Qiu, A. Quintero, C. Racz, S. K. Radhakrishnan, N. Raha, R. L. Ray, R. Reed, H. G. Ritter, M. Robotkova, O. Rogachevskiy, J. L. Romero, L. Ruan, J. Rusnak, N. R. Sahoo, H. Sako, S. Salur, J. Sandweiss, S. Sato, W. B. Schmidke, N. Schmitz, B. R. Schweid, F. Seck, J. Seger, M. Sergeeva, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P. Shanmuganathan, M. Shao, T. Shao, A. Sheikh, D. Shen, S. S. Shi, Y. Shi, Q. Y. Shou, E. P. Sichtermann, R. Sikora, M. Simko, J. Singh, S. Singha, M. J. Skoby, N. Smirnov, Y. Sohngen, W. Solyst, P. Sorensen, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, M. Stefaniak, D. J. Stewart, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. Sumbera, B. Summa, X. M. Sun, X. Sun, Y. Sun, Y. Sun, B. Surrow, D. N. Svirida, Z. W. Sweger, P. Szymanski, A. H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, J. H. Thomas, A. R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, C. A. Tomkiel, S. Trentalange, R. E. Tribble, P. Tribedy, S. K. Tripathy, T. Truhlar, B. A. Trzeciak, O. D. Tsai, Z. Tu, T. Ullrich, D. G. Underwood, I Upsal, G. Van Buren, J. Vanek, A. N. Vasiliev, I Vassiliev, V. Verkest, F. Videbaek, S. Vokal, S. A. Voloshin, F. Wang, G. Wang, J. S. Wang, P. Wang, Y. Wang, Y. Wang, Z. Wang, J. C. Webb, P. C. Weidenkaff, L. Wen, G. D. Westfall, H. Wieman, S. W. Wissink, J. Wu, Y. Wu, B. Xi, Z. G. Xiao, G. Xie, W. Xie, H. Xu, N. Xu, Q. H. Xu, Y. Xu, Z. Xu, Z. Xu, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, Z. Ye, L. Yi, K. Yip, Y. Yu, H. Zbroszczyk, W. Zha, C. Zhang, D. Zhang, S. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Y. Zhang, Y. Zhang, Z. J. Zhang, Z. Zhang, Z. Zhang, J. Zhao, C. Zhou, X. Zhu, Z. Zhu, M. Zurek, M. Zyzak

Summary: The chiral magnetic effect is a phenomenon of charge separation caused by the imbalanced chirality of quarks in quantum chromodynamics. Experimental measurements are challenging due to background interference, but the sensitivity of the effect to specific planes can help determine the signal. In this study, measurements in Au + Au collisions at the Relativistic Heavy-Ion Collider indicate that the charge separation is consistent with zero in peripheral collisions, while some indication of a finite chiral magnetic effect signal is observed in midcentral collisions, but significant residual background effects may still be present.

PHYSICAL REVIEW LETTERS (2022)

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Article Physics, Particles & Fields

Event-shape engineering analysis of D meson in ultrarelativistic heavy-ion collisions

Maria Lucia Sambataro, Yifeng Sun, Vincenzo Minissale, Salvatore Plumari, Vincenzo Greco

Summary: In this study, we describe the propagation of charm quarks in the quark-gluon plasma using an event-by-event transport approach. The non-perturbative interaction between heavy quarks and light partons is taken into account through a quasi-particle approach. The results show a good agreement with experimental measurements, indicating a strong coupling between charm quarks and light quarks in the QCD matter. Furthermore, a novel study is presented on the event-by-event correlations between flow harmonics of D mesons and soft hadrons, which can provide further constraints on heavy quark transport coefficients.

EUROPEAN PHYSICAL JOURNAL C (2022)

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Article Physics, Multidisciplinary

Measurements of the Elliptic and Triangular Azimuthal Anisotropies in Central He+Au, 4+Au and p+Au Collisions at & RADIC;SNN=200 GeV br

M. I. Abdulhamid, B. E. Aboona, J. Adam, J. R. Adams, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, D. M. Anderson, A. Aparin, S. Aslam, J. Atchison, G. S. Averichev, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, P. Bhagat, A. Bhasin, S. Bhatta, I. G. Bordyuzhin, J. D. Brandenburg, A. V. Brandin, X. Z. Cai, H. Caines, M. Calderon de la Barca Sanchez, D. Cebra, J. Ceska, I. Chakaberia, B. K. Chan, Z. Chang, A. Chatterjee, D. Chen, J. Chen, J. H. Chen, Z. Chen, J. Cheng, Y. Cheng, S. Choudhury, W. Christie, X. Chu, H. J. Crawford, G. Dale-Gau, A. Das, M. Daugherity, T. G. Dedovich, I. M. Deppner, A. A. Derevschikov, A. Dhamija, L. Di Carlo, L. Didenko, P. Dixit, X. Dong, J. L. Drachenberg, E. Duckworth, J. C. Dunlop, J. Engelage, G. Eppley, S. Esumi, O. Evdokimov, A. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, C. J. Feng, Y. Feng, E. Finch, Y. Fisyak, F. A. Flor, C. Fu, F. Geurts, N. Ghimire, A. Gibson, K. Gopal, X. Gou, D. Grosnick, A. Gupta, A. Hamed, Y. Han, M. D. Harasty, J. W. Harris, H. Harrison-Smith, W. He, X. H. He, Y. He, C. Hu, Q. Hu, Y. Hu, H. Huang, H. Z. Huang, S. L. Huang, T. Huang, X. Huang, Y. Huang, Y. Huang, T. J. Humanic, D. Isenhower, M. Isshiki, W. W. Jacobs, A. Jalotra, C. Jena, Y. Ji, J. Jia, C. Jin, X. Ju, E. G. Judd, S. Kabana, M. L. Kabir, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, M. Kelsey, B. Kimelman, A. Kiselev, A. G. Knospe, H. S. Ko, L. Kochenda, A. A. Korobitsin, P. Kravtsov, L. Kumar, S. Kumar, R. Kunnawalkam Elayavalli, R. Lacey, J. M. Landgraf, A. Lebedev, R. Lednicky, J. H. Lee, Y. H. Leung, N. Lewis, C. Li, W. Li, X. Li, Y. Li, Y. Li, Z. Li, X. Liang, Y. Liang, T. Lin, C. Liu, F. Liu, G. Liu, H. Liu, H. Liu, L. Liu, T. Liu, X. Liu, Y. Liu, Z. Liu, T. Ljubicic, W. J. Llope, O. Lomicky, R. S. Longacre, E. M. Loyd, T. Lu, N. S. Lukow, X. F. Luo, V. B. Luong, L. Ma, R. Ma, Y. G. Ma, N. Magdy, D. Mallick, S. Margetis, H. S. Matis, J. A. Mazer, G. McNamara, K. Mi, N. G. Minaev, B. Mohanty, M. M. Mondal, I. Mooney, D. A. Morozov, A. Mudrokh, M. I. Nagy, A. S. Nain, J. D. Nam, Md. Nasim, D. Neff, J. M. Nelson, D. B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, R. Nishitani, L. V. Nogach, T. Nonaka, G. Odyniec, A. Ogawa, S. Oh, V. A. Okorokov, K. Okubo, B. S. Page, R. Pak, J. Pan, A. Pandav, A. K. Pandey, Y. Panebratsev, T. Pani, P. Parfenov, A. Paul, C. Perkins, B. R. Pokhrel, M. Posik, T. Protzman, N. K. Pruthi, J. Putschke, Z. Qin, H. Qiu, A. Quintero, C. Racz, S. K. Radhakrishnan, N. Raha, R. L. Ray, H. G. Ritter, C. W. Robertson, O. V. Rogachevsky, M. A. Rosales Aguilar, D. Roy, L. Ruan, A. K. Sahoo, N. R. Sahoo, H. Sako, S. Salur, E. Samigullin, S. Sato, W. B. Schmidke, N. Schmitz, J. Seger, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P. V. Shanmuganathan, T. Shao, M. Sharma, N. Sharma, R. Sharma, S. R. Sharma, A. I. Sheikh, D. Y. Shen, K. Shen, S. S. Shi, Y. Shi, Q. Y. Shou, F. Si, J. Singh, S. Singha, P. Sinha, M. J. Skoby, Y. Soehngen, Y. Song, B. Srivastava, T. D. S. Stanislaus, D. J. Stewart, M. Strikhanov, B. Stringfellow, Y. Su, C. Sun, X. Sun, Y. Sun, Y. Sun, B. Surrow, D. N. Svirida, Z. W. Sweger, A. Tamis, A. H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, J. H. Thomas, D. Tlusty, T. Todoroki, M. V. Tokarev, C. A. Tomkiel, S. Trentalange, R. E. Tribble, P. Tribedy, O. D. Tsai, C. Y. Tsang, Z. Tu, T. Ullrich, D. G. Underwood, I. Upsal, G. Van Buren, A. N. Vasiliev, V. Verkest, F. Videbaek, S. Vokal, S. A. Voloshin, F. Wang, G. Wang, J. S. Wang, X. Wang, Y. Wang, Y. Wang, Y. Wang, Z. Wang, J. C. Webb, P. C. Weidenkaff, G. D. Westfall, H. Wieman, G. Wilks, S. W. Wissink, J. Wu, J. Wu, X. Wu, Y. Wu, B. Xi, Z. G. Xiao, G. Xie, W. Xie, H. Xu, N. Xu, Q. H. Xu, Y. Xu, Y. Xu, Z. Xu, Z. Xu, G. Yan, Z. Yan, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, Z. Ye, L. Yi, K. Yip, Y. Yu, W. Zha, C. Zhang, D. Zhang, J. Zhang, S. Zhang, W. Zhang, X. Zhang, Y. Zhang, Y. Zhang, Z. J. Zhang, Z. Zhang, Z. Zhang, F. Zhao, J. Zhao, M. Zhao, C. Zhou, J. Zhou, S. Zhou, Y. Zhou, X. Zhu, M. Zurek, M. Zyzak

Summary: The elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients in central 3He Au, d Au, and p Au collisions at p = 200 GeV are measured as a function of transverse momentum (pT) at midrapidity. The v2opT values depend on the colliding systems, while the v3opT values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small-sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.

PHYSICAL REVIEW LETTERS (2023)

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Article Physics, Nuclear

Hydrodynamic simulations of directed flow for light hadrons in Au plus Au and isobar collisions at vsNN=200 GeV

Jing Jing, Ze-Fang Jiang, C. B. Yang, Ben-Wei Zhang

Summary: Using a (3+1)-D hydrodynamic model, CLVisc, the study investigates the directed flow (v(1)) of light hadrons produced in Au+Au, Ru+Ru, and Zr+Zr collisions at root(NN)-N-s = 200 GeV. The research systematically investigates the evolution of tilted energy density, pressure gradient, and radial flow along the x-direction. The results show that the counter-clockwise tilt of the initial fireball is a vital source of directed flow for final light hadrons. A good description of directed flow is observed for light hadrons in central and mid-central Au+Au and isobar collisions at the RHIC. The numerical results also demonstrate a clear system size dependence for light hadron across different collision systems. The study further examines the effect of nuclear structure on the directed flow and finds that for light hadrons, it is insensitive to nuclei with quadrupole deformation.

CHINESE PHYSICS C (2023)

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Article Physics, Nuclear

Strong directed flow of heavy flavor as a probe of matter distribution in heavy-ion collisions

Sandeep Chatterjee, Piotr Bozek

NUCLEAR PHYSICS A (2019)

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Article Physics, Nuclear

New measures of longitudinal decorrelation of harmonic flow

Piotr Bozek, Wojciech Broniowski

NUCLEAR PHYSICS A (2019)

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Article Physics, Nuclear

Flow in collisions of light nuclei

Wojciech Broniowski, Piotr Bozek, Maciej Rybczynski, Enrique Ruiz Arriola

Summary: This talk discusses interesting aspects of collective flow in small systems, including exploring elliptic flow with heavy nuclei collisions on polarized deuteron targets, Glauber model predictions for the O-16 - O-16 program at RHIC and the LHC, and proposing specific flow signatures in collisions between light and heavy nuclei.

NUCLEAR PHYSICS A (2021)

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Proceedings Paper Physics, Multidisciplinary

PROBING FLOW FLUCTUATIONS THROUGH FACTORIZATION BREAKING OF HARMONIC FLOWS IN HEAVY-ION COLLISION

Piotr Bozek, Rupam Samanta

Summary: We study factorization-breaking coefficients between flow vectors with momentum-dependence and momentum-averaging to investigate flow fluctuations in heavy-ion collision caused by initial-state fluctuations. The coefficients for flow vector squared and flow magnitude squared are useful for the extraction of flow angle decorrelations. We compare our model results with preliminary experimental data and make predictions for the momentum-dependent correlation between mixed flow harmonics.

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2023)

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Article Physics, Nuclear

Random model of flow decorrelation

Piotr Bozek, Hadi Mehrabpour

Summary: The generated flow in relativistic heavy-ion collisions fluctuates between events, leading to a decorrelation of flow vectors in different regions of phase space. A simple random model of flow decorrelation in pseudorapidity is presented, deriving analytical expressions for the breaking coefficients of flow vectors, magnitudes, and angles. This model explains the relationships between different breaking coefficients observed in experimental data and model simulations, notably that the angle decorrelation contributes to half of the total flow vector decorrelation.

PHYSICAL REVIEW C (2023)

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Article Physics, Nuclear

Momentum-dependent flow correlations in deformed nuclei at collision energies available at the BNL Relativistic Heavy Ion Collider

Rupam Samanta, Piotr Bozek

Summary: Flow fluctuations in ultrarelativistic heavy-ion collisions can be probed by studying momentum dependent correlations or factorization-breaking coefficients between flow harmonics in separate kinematic bins. The effect of nuclear deformation on momentum dependent coefficients is investigated in collisions of deformed 238U + 238U nuclei. Momentum dependent mixed-flow correlations for the isobar collision system: 96Ru +96Ru and 96Zr + 96Zr, which provide the ideal scenario to study nuclear deformation effect, are also studied. The TRENTO + MUSIC model is used for simulations and event-by-event analysis, revealing that these momentum dependent correlation coefficients are not only excellent candidates to probe fluctuations in heavy-ion collisions, but also show significant sensitivity to nuclear deformation.

PHYSICAL REVIEW C (2023)

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Article Physics, Nuclear

Interplay of longitudinal and transverse expansion in the kinetic dynamics of heavy-ion collisions

Piotr Bozek

Summary: The early dynamics in heavy-ion collisions involves a rapid, far from equilibrium evolution. This early pre-equilibrium stage of the dynamics can be modeled using kinetic equations. The effect of this pre-equilibrium stage on final observables derived from transverse momenta of emitted particles is small. The asymmetry of the flow with respect to the reaction plane at different rapidities is found to be very sensitive to the degree of nonequilibrium in the evolution. This suggests that the rapidity odd directed flow could be studied to identify the occurrence of nonequilibrium effects and to estimate the asymmetry of the pressure between the longitudinal and transverse directions in the collision.

PHYSICAL REVIEW C (2023)

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Article Physics, Nuclear

Splitting of proton-antiproton directed flow in relativistic heavy-ion collisions

Piotr Bozek

Summary: The rapidity-dependent directed flow of particles produced in a relativistic heavy-ion collision is generated by the hydrodynamic expansion of a tilted source, where the asymmetry of the pressure leads to the accumulation of matter-directed flow. The observed ordering of directed flow of baryons, pions, and antibaryons can be described by the expansion of a baryon inhomogeneous fireball.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Factorization breaking for higher moments of harmonic flow

Piotr Bozek, Rupam Samanta

Summary: We study correlations between harmonic flow vectors squared measured at different transverse momenta and propose a method to independently measure the flow vector, the flow magnitude, and the flow angle correlations. The experimental results are compared to preliminary data of the ALICE Collaboration, and predictions for the momentum-dependent factorization-breaking coefficient between mixed flow harmonics are presented. These studies provide additional information for understanding the fluctuating initial state and dynamics in heavy-ion collisions.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Higher order cumulants of transverse momentum and harmonic flow in relativistic heavy ion collisions

Piotr Bozek, Rupam Samanta

Summary: This study investigates higher order symmetric cumulants of global collective observables in heavy ion collisions, calculating third and fourth order cumulants in a hydrodynamic model and using a linear predictor to estimate their values. The paper highlights the use of symmetric cumulants divided by averages (or standard deviations) of observables as a powerful tool to study correlations present in the initial state of collisions.

PHYSICAL REVIEW C (2021)

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Review Physics, Nuclear

QCD challenges from pp to A-A collisions

J. Adolfsson, A. Andronic, C. Bierlich, P. Bozek, S. Chakraborty, P. Christiansen, D. D. Chinellato, R. J. Fries, G. Gustafson, H. van Hees, P. M. Jacobs, D. J. Kim, L. Lonnblad, M. Mace, O. Matonoha, A. Mazeliauskas, A. Morsch, A. Nassirpour, A. Ohlson, A. Ortiz, A. Oskarsson, I. Otterlund, G. Paic, D. V. Perepelitsa, C. Plumberg, R. Preghenella, R. Rapp, C. O. Rasmussen, A. Rossi, O. V. Rueda, A. V. D. Silva, D. Silvermyr, A. Timmins, T. Sjostrand, R. Tornkvist, M. Utheim, V. Vislavicius, U. A. Wiedemann, K. Zapp, W. Zhao

EUROPEAN PHYSICAL JOURNAL A (2020)

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Article Physics, Nuclear

Correlation coefficient between harmonic flow and transverse momentum in heavy-ion collisions

Piotr Bozek, Hadi Mehrabpour

PHYSICAL REVIEW C (2020)

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Article Physics, Nuclear

Elliptic flow in ultrarelativistic collisions with light polarized nuclei

Wojciech Broniowski, Piotr Bozek

PHYSICAL REVIEW C (2020)

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Proceedings Paper Physics, Multidisciplinary

INITIAL DEFORMATION OF A QGP DROPLET FROM COLLISIONS WITH POLARIZED DEUTERONS

Wojciech Broniowski, Piotr Bozek

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2020)

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Proceedings Paper Physics, Multidisciplinary

INTERFEROMETRY IN CENTRAL p plus Pb COLLISIONS

Piotr Bozek, Sebastian Bysiak

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2019)

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