Global 
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-hyperon polarization in 
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 collisions at 
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Abdallah, M. S.; Aboona, B. E.; Adam, J.; Adamczyk, L.; Adams, J. R.; Adkins, J. K.; Agakishiev, G.; Aggarwal, I.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Anderson, D. M.; Aparin, A.; Aschenauer, E. C.; Ashraf, Muhammad Usman; Atetalla, F. G.; Attri, A.; Averichev, G. S.; Bairathi, V.; Baker, W.; Ball, J.; Barish, K. N.; Behera, A.; Bellwied, R.; Bhagat, P.; Bhasin, A.; Bielčík, J.; Bielčíková, J.; Bordyuzhin, I. G.; Brandenburg, J. D.; Brandin, A. V.; Bunzarov, I.; Butterworth, J. M.; Cai, X. Z.; Caines, H.; Sánchez, M. Calderón De La Barca; Cebra, D.; Chakaberia, I.; Chaloupka, P.; Chan, B. K.; Chang, Z.; Chang, Z.; Chankova-Bunzarova, N.; Chatterjee, A.; Chattopadhyay, Subhasis; Chen, D.; Chen, J.; Chen, J. H.; Chen, X.; Chen, Z.; Cheng, J.; Chevalier, M.; Choudhury, S.; Christie, W.; Chu, X.; Crawford, H. J.; Csanád, M.; Daugherity, M.; Dedovich, T. G.; Deppner, I. M.; Derevschikov, A. A.; Dhamija, A.; Carlo, L. Di; Didenko, L.; Dixit, P.; Dong, X.; Drachenberg, J. L.; Duckworth, E.; Dunlop, J. C.; Elsey, N.; Engelage, J.; Eppley, G.; Esumi, S.; Evdokimov, O.; Ewigleben, A.; Eyser, O.; Fatemi, R.; Fawzi, F. M.; Fazio, S.; Federic, P.; Fedorišin, J.; Feng, C.; Feng, Y.; Filip, P.; Finch, E.; Fisyak, Y.; Francisco, A.; Fu, C.; Fulek, Ł.; Gagliardi, C. A.; Galatyuk, T.; Geurts, F. J. M.; Ghimire, Nirmal; Gibson, A.; Gopal, K.; Gou, X.; Grosnick, D.; Gupta, A.; Guryn, W.; Hamad, A. I.; Hamed, A.; Han, Y. F.; Harabasz, S.; Harasty, M. D.; Harris, J. W.; Harrison, H.; He, S.; He, W.; He, X.; He, Yang; Heppelmann, S.; Herrmann, N.; Hoffman, Eric A.; Holub, L.; Hu, Y.; Huang, H. Z.; Huang, S.; Huang, T.; Huang, X.; Huang, Y.; Humanic, T. J.; Igo, G.; Isenhower, D.; Jacobs, W. W.; Jena, C.; Jentsch, A.; Ji, Y.; Jia, J.; Jiang, K.; Ju, X.; Judd, E. G.; Kabana, S.; Kabir, M. L.; Kagamaster, S.; Kalinkin, D.; Kang, K.; Kapukchyan, D.; Kauder, K.; Ke, H. W.; Keane, D.; Kechechyan, A.; Kelsey, M.; Khyzhniak, Y. V.; Kikoła, D. P.; Kim, C.; Kimelman, B.; Kincses, D.; Kisel, I.; Kiselev, A.; Knospe, A. G.; Ko, H. S.; Kochenda, L.; Kosarzewski, L. K.; Kramárik, L.; Кравцов, П.; Kumar, L.; Kumar, S.; Elayavalli, Raghav Kunnawalkam; Kwasizur, J. H.; Lacey, R.; Lan, S.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lednický, R.; Lee, J. H.; Leung, Y. H.; Li, C.; Li, C.; Li, W.; Li, X.; Li, Y.; Liang, X.; Liang, Y.; Licenik, R.; Lin, T.; Lin, Y.; Lisa, M. A.; Liu, F.; Liu, H.; Liu, H.; Liu, P.; Liu, T.; Liu, X.; Liu, Y.; Liu, Z.; Ljubičić, T.; Llope, W. J.; Longacre, R. S.; Loyd, E.; Lukow, N. S.; Luo, X.; Ma, L.; Ma, R.; Ma, Yugang; Magdy, N.; Mallick, D.; Margetis, S.; Markert, C.; Matis, H. S.; Mazer, J.; Minaev, N. G.; Mioduszewski, S.; Mohanty, B.; Mondal, M. M.; Mooney, I.; Морозов, Д. А.; Mukherjee, A.; Nagy, M. I.; Nam, J. D.; Nasim, Md.; Nayak, K.; Neff, D.; Nelson, J. M.; Nemes, D. B.; Nie, M.; Nigmatkulov, G.; Niida, T.; Nishitani, R.; Nogach, L. V.; Nonaka, T.; Nunes, A. S.; Odyniec, G.; Ogawa, A.; Oh, S. B.; Okorokov, V.; Page, B. S.; Pak, R.; Pan, J.; Pandav, A.; Pandey, A. K.; Panebratsev, Y.; Parfenov, P.; Pawlik, B.; Pawłowska, D.; Pei, H.; Perkins, C.; Pinsky, L.; Pintér, R. L.; Pluta, J.; Pokhrel, B. R.; Ponimatkin, G.; Porter, J.; Posik, M.; Prozorova, V.; Pruthi, N. K.; Przybycień, M.; Putschke, J.; Qiu, H.; Quintero, A.; Racz, C.; Radhakrishnan, S. K.; Raha, N.; Ray, R. L.; Reed, R.; Ritter, H. G.; Robotkova, M.; Rogachevskiy, O. V.; Romero, J. L.; Roy, D.; Ruan, L.; Rusňák, J.; Sahoo, N.; Sako, H.; Salur, S.; Sandweiss, J.; Sato, Susumu; Schmidke, W. B.; Schmitz, N.; Schweid, B. R.; Seck, F.; Seger, J.; Sergeeva, M.; Seto, R.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shanmuganathan, P. V.; Shao, M.; Shao, T.; Sheikh, A. I.; Shen, D. Y.; Shi, Shuzhe; Shi, Y.; Shou, Q.; Sichtermann, E. P.; Sikora, R.; Simko, M.; Singh, J. B.; Singha, S.; Skoby, M. J.; Smirnov, N.; Söhngen, Y.; Solyst, W.; Sorensen, P.; Spinka, H. M.; Srivastava, B.; Stanislaus, T. S.; Stefaniak, M.; Stewart, D. 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doi:10.1103/physrevc.104.l061901

Cited by 74 publications

(28 citation statements)

References 57 publications

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“…Figure 5 demonstrates the effect of the meson-field contribution to the global Λ polarization. As seen, the additional meson-field term considerably reduces the Λ polarization in rapidity window |y h | < 0.8 at low collision energies and makes it closer the STAR data at 3 GeV [8]. At the same time this effect is small in narrower window |y h | < 0.4.…”

Section: Meson-field Induced Polarizationmentioning

confidence: 53%

“…First data (some of them prelyminary) on the global polarization of Λ were presented in Refs. [8][9][10] for energies 3 GeV, 7.2 GeV, and 2.4 GeV, respectively. The first two energy points are obtained within STAR fixed-target program (FXT-STAR) at RHIC [11], the third pointby HADES Collaboration at GSI Helmholtzzentrum für Schwerionenforschung [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Global $Λ$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction

Ivanov,

Soldatov

2022

Preprint

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Based on the three-fluid model, the global Λ polarization in Au+Au collisions at 2.4 ≤ √ sNN ≤ 7.7 GeV is calculated, including its rapidity and centrality dependence. Contributions from the thermal vorticity and meson-field term (proposed by Csernai, Kapusta and Welle) to the global polarization are considered. The results are compared with data from recent and ongoing STAR and HADES experiments. It is predicted that the polarization maximum is reached at √ sNN ≈ 3 GeV, if the measurements are performed with the same acceptance. The value of the polarization is very sensitive to interplay of the aforementioned contributions. In particular, the thermal vorticity results in quite strong increase of the polarization from the midrapidity to forward/backward rapidities, while the meson-field contribution considerably flattens the rapidity dependence. The polarization turns out to be very sensitive to details of the equation of state. While collision dynamics become less equilibrium with decreasing collision energy, the present approach to polarization is based on the assumption of thermal equilibrium. It is found that equilibrium is achieved at the freeze-out stage, but this equilibration takes longer at moderately relativistic energies.

show abstract

Section: Meson-field Induced Polarizationmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Global $Λ$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction

Ivanov,

Soldatov

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Recent observations of spin polarization of weakly decaying hyperons produced in relativistic heavy-ion experiments across various collision energies [1][2][3][4][5][6][7][8][9] have provided a unique probe to study polarization phenomena in relativistic nuclear matter under rotation [10]. Motivated by the earlier successes of relativistic fluid dynamics in heavy-ion phenomenology [11], several extensions of relativistic hydrodynamics for the spinpolarized fluids have been developed using quantum statistical density operators [12][13][14][15][16], relativistic kinetic theory [17][18][19][20][21][22][23][24][25][26][27][28][29], effective Lagrangian approach [30][31][32][33], entropy current analysis [34][35][36][37][38][39], holography [40,41] and equilibrium partition functions [42].…”

Section: Introductionmentioning

confidence: 99%

Equivalence of canonical and phenomenological formulations of spin hydrodynamics

Daher¹,

Das²,

Florkowski³

et al. 2022

Preprint

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Two formulations of relativistic hydrodynamics of particles with spin 1/2 are compared. The first one uses expressions for the energy-momentum and spin tensors that have properties that follow a direct application of Noether's theorem, including a totally antisymmetric spin tensor. The other one is based on a simplified form of the spin tensor that is commonly used in the current literature under the name of phenomenological pseudo-gauge. We show that these two frameworks are equivalent, since they can be directly connected by a suitably defined pseudogauge transformation. Our analysis uses arguments related to the positivity of entropy production. The latter turns out to be independent of the pseudo-gauge provided the canonical energy-momentum tensor is properly improved.

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“…Particularly interesting directions of study which are recently being followed include investigations of spin polarization phenomena in relativistic nuclear matter [12,13] and its dynamics under the influence of electromagnetic fields (EM) [14]. Recent spin polarization measurements of emitted particles provided a new probe for studying QGP [15][16][17][18][19][20][21][22] and triggered many theoretical developments [23][24][25][26][27][28][29][30][31][32], see also [33][34][35][36][37][38][39][40][41][42]. Being oriented along the direction of the global angular momentum of the colliding system, microscopically, the spin polarization is believed to arise because of the spin-orbit coupling [43].…”

Section: Introductionmentioning

confidence: 99%

Relativistic magnetohydrodynamics with spin

Singh¹,

Shokri²,

Mehr³

2022

Preprint

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We extend the classical phase-space distribution function to include the spin and electromagnetic fields coupling and derive the modified constitutive relations for charge current, energy-momentum tensor, and spin tensor. Because of the coupling, the new tensors receive corrections to their perfect-fluid counterparts and make the background and spin fluid equations of motion communicate with each other. We investigate special cases which are relevant in high-energy heavy-ion collisions, including baryon free matter and large mass limit. Using Bjorken symmetries, we find that spin polarization increases with increasing magnetic field for an initially positive baryon chemical potential. The corrections derived in this framework may help to explain the splitting observed in Lambda hyperons spin polarization measurements.

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Global Λ -hyperon polarization in Au+Au collisions at sNN=3

Cited by 74 publications

References 57 publications

Global $Λ$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction

Global $Λ$ polarization in heavy-ion collisions at energies 2.4--7.7 GeV: Effect of Meson-Field Interaction

Equivalence of canonical and phenomenological formulations of spin hydrodynamics

Relativistic magnetohydrodynamics with spin

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