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Using the symmetry properties of the strong interaction, such as the Pauli principle, the P-invariance, the conservation of the total angular momentum and isotopic invariance, we establish the spin structure of the threshold matrix elements…

High Energy Physics - Phenomenology · Physics 2009-11-10 Michail P. Rekalo , Egle Tomasi-Gustafsson

The extent of a locally equilibrated parton plasma in d + Au collisions at sqrt(s_NN) = 200 GeV is investigated as a function of centrality in a nonequilibrium-statistical framework. Based on a three-sources model, analytical solutions of a…

High Energy Physics - Phenomenology · Physics 2011-07-19 G. Wolschin , M. Biyajima , T. Mizoguchi , N. Suzuki

We show that the transverse-mass and rapidity spectra of protons and pions produced in Au-Au collisions at sqrt(sNN) = 2.4 GeV can be well reproduced in a thermodynamic model assuming single freeze-out of particles from a spherically…

Nuclear Theory · Physics 2021-02-23 Sz. Harabasz , W. Florkowski , T. Galatyuk , M. Gumberidze , R. Ryblewski , P. Salabura , J. Stroth

Incorporating for the first time both the spin and isospin degrees of freedom explicitly in transport model simulations of intermediate-energy heavy-ion collisions, we observe that a local spin polarization appears during collision process.…

Nuclear Theory · Physics 2013-07-09 Jun Xu , Bao-An Li

Collective flow coefficients and spin polarization are valuable probes of the geometry and flow velocity field of the quark-gluon plasma (QGP) produced in relativistic heavy-ion collisions. Using a modified TRENTo initial condition coupled…

Nuclear Theory · Physics 2024-08-13 Ze-Fang Jiang , Shanshan Cao , Ben-Wei Zhang

The significant splitting of $\Lambda$ and $\bar{\Lambda}$ polarization measured in STAR's Au+Au 7.7GeV collisions seems to be huge and unable to be described satisfactorily by any single mechanism, thus we revisit and combine there…

Nuclear Theory · Physics 2023-05-31 Simin Wu , Yilong Xie

The system created in non-central relativistic nucleus-nucleus collisions possesses large orbital angular momentum. Due to spin-orbit coupling, particles produced in such a system could become globally polarized along the direction of the…

Nuclear Experiment · Physics 2008-11-26 STAR Collaboration , B. I. Abelev , I. Selyuzhenkov

In heavy-ion collisions, the harmonic flow $V_n$ of final-state particles are driven by the eccentricity vector ${\mathcal{E}}_n$ that describe the shape of the initial fireball projected in the transverse plane. It is realized recently…

Nuclear Theory · Physics 2020-07-01 Arabinda Behera , Maowu Nie , Jiangyong Jia

We study the effect of vorticity present in heavy ion collisions (HICs) on the temperature evolution of hot quark-gluon plasma in the presence of spin-vorticity coupling. The initial global rotation entails a nontrivial dependence of the…

High Energy Physics - Phenomenology · Physics 2019-07-24 Jitesh R Bhatt , Hiranmaya Mishra , Balbeer Singh

We present a study of three-particle correlations among a trigger particle and two associated particles in Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV using a multi-phase transport model (AMPT) with both partonic and hadronic…

Nuclear Theory · Physics 2008-11-26 G. L. Ma , Y. G. Ma , S. Zhang , X. Z. Cai , J. H. Chen , Z. J. He , H. Z. Huang , J. L. Long , W. Q. Shen , X. H. Shi , C. Zhong , J. X. Zuo

Most atomic nuclei are deformed with a quadrupole shape described by its overall strength $\beta_2$ and triaxiality $\gamma$. The deformation can be accessed in high-energy heavy-ion collisions by measuring the collective flow response of…

Nuclear Theory · Physics 2022-05-04 Jiangyong Jia

New diagnostic methods are presented for localized, barotropic vorticity evolution in tornadic environments. These methods focus on superhelicity, a quantity shown to be strongly related to local maxima in vorticity tendency. Mobile Doppler…

Atmospheric and Oceanic Physics · Physics 2014-08-20 Marcus Büker , Luke Odell , Joshua Wurman , Karen Kosiba , James Marquis

We study the production of transversely polarized Lambda hyperons in high-energy collisions of protons with large nuclei. The large gluon density of the target at saturation provides an intrinsic semi-hard scale which should naturally allow…

High Energy Physics - Phenomenology · Physics 2009-11-07 Daniel Boer , Adrian Dumitru

The structures of multiply quantized vortices (MQVs) of an equal-population atomic Fermi superfluid in a rotating spherical bubble trap approximated as a thin shell are analyzed by solving the Bogoliubov-de Gennes (BdG) equation throughout…

Quantum Gases · Physics 2023-11-02 Yan He , Chih-Chun Chien

Relativistic heavy ion collisions provide a unique opportunity to study the shape of colliding nuclei, even up to higher-order multiple deformations. In this work, several observables that are sensitive to quadrupole and hexadecapole…

Nuclear Theory · Physics 2024-08-29 Zaining Wang , Jinhui Chen , Hao-jie Xu , Jie Zhao

We study the directed flow of identified particles in Au+Au collisions at $\sqrt{s_\text{NN}}=7.7$ to 62.4 GeV. The Glauber model is extended to include both a tilted deformation of the QGP fireball with respect to the longitudinal…

Nuclear Theory · Physics 2023-03-10 Ze-Fang Jiang , Xiang-Yu Wu , Shanshan Cao , Ben-Wei Zhang

The single vortex problem in a strongly correlated bosonic system is investigated self-consistently within the mean-field theory of the Bose-Hubbard model. Near the superfluid-Mott transition, the vortex core has a tendency toward the…

Strongly Correlated Electrons · Physics 2007-05-23 Congjun Wu , Han-dong Chen , Jiang-ping Hu , Shou-Cheng Zhang

Experiments at the Relativistic Heavy Ion Collider (RHIC) have measured the net polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons and attributed it to a coupling between their spin and the vorticity of the fluid created in heavy ion…

Nuclear Theory · Physics 2020-03-25 Joseph I. Kapusta , Ermal Rrapaj , Serge Rudaz

The production mechanisms of charmonium states in both hadronic and heavy-ion collisions hold great significance for investigating the hot and dense QCD matter. Studying charmonium polarization in ultra-relativistic collisions can also…

High Energy Physics - Phenomenology · Physics 2024-03-25 Bhagyarathi Sahoo , Dushmanta Sahu , Suman Deb , Captain R. Singh , Raghunath Sahoo

We introduce additional coalescence factors for the production of strange baryons in a multiphase transport (AMPT) model in order to describe the enhanced production of multistrange hadrons observed in Pb-Pb collisions at $\rm…

Nuclear Theory · Physics 2020-12-23 Tianhao Shao , Jinhui Chen , Che Ming Ko , Zi-Wei Lin