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Based on the formalism presented in [1], we make a systematic study of spin polarizations of hadrons with different spins including vector mesons, spin-1/2 and spin-3/2 hyperons and spin correlations of hadron-hadron such as…

Nuclear Theory · Physics 2026-03-17 Ji-peng Lv , Zi-han Yu , Xiao-wen Li , Zuo-tang Liang

Based on a spin-dependent Boltzmann-Uehling-Uhlenbeck transport model with spin-dependent potentials incorporated using the lattice Hamiltonian method, we have studied the global spin polarization perpendicular to the reaction plane as well…

Nuclear Theory · Physics 2019-12-10 Yin Xia , Jun Xu

To achieve an understanding of the thermalization of a quark-gluon plasma, starting from QCD without using model assumptions, is a formidable task. We study the early stage dynamics of a relativistic heavy ion collision in the framework of…

High Energy Physics - Phenomenology · Physics 2016-05-31 Maximilian Attems , Owe Philipsen , Christian Schäfer , Björn Wagenbach , Savvas Zafeiropoulos

We study helicity polarization through the (3+1) dimensional relativistic viscous hydrodynamic models at $\sqrt{s_{NN}}=200$GeV Au+Au collisions. Similar to the local spin polarization, we consider the helicity polarization beyond global…

High Energy Physics - Phenomenology · Physics 2022-05-03 Cong Yi , Shi Pu , Jian-Hua Gao , Di-Lun Yang

We propose the weak magnetic effect, which emerges in quark-gluon plasma close to local thermal equilibrium as the dissipative correction to the quark phase space distribution function, as a novel contribution to the observed Lambda hyperon…

Nuclear Theory · Physics 2024-02-27 Jing-An Sun , Li Yan

The rapidity distribution of $\Lambda$ and $\bar{\Lambda}$ produced in nucleus-nucleus collisions at CERN energies is studied in the framework of an independent string model - with quark-antiquark as well as diquark-antidiquark pairs in the…

High Energy Physics - Phenomenology · Physics 2008-02-03 A. Capella , A. Kaidalov , A. Kouider Akil , C. Merino , J. Tran Thanh Van

Spin-dependent deconfined interaction in the Q\barQ system is derived from the field correlators known from lattice and analytic calculations. As a result hyperfine splitting is found numerically for charmonium, bottomonium and strangeonium…

High Energy Physics - Phenomenology · Physics 2007-05-23 Yu. A. Simonov

By using the Nambu-Jona-Lasinio model with a tensor-type four-point interaction between quarks, it is shown that there exists a possibility of a spin polarized phase in quark matter at finite temperature and density. When there exists the…

High Energy Physics - Phenomenology · Physics 2017-03-14 Y. Tsue , J. da Providencia , C. Providencia , H. Matsuoka , M. Yamamura , H. Bohr

We show that spin polarization of a fermion in a relativistic fluid at local thermodynamic equilibrium can be generated by the symmetric derivative of the four-temperature vector, defined as thermal shear. As a consequence, besides…

Nuclear Theory · Physics 2021-07-21 F. Becattini , M. Buzzegoli , A. Palermo

We check the $u$ and $d$ quark contributions to the spin content of the $\Lambda$ by means of the $q\to\Lambda$ fragmentation and find that the $u$ and $d$ quarks of the $\Lambda$ are likely positively polarized. The parton distributions in…

High Energy Physics - Phenomenology · Physics 2011-02-01 Jian-Jun Yang

The relativistic Fokker Planck equation has been used to study the evolution of the quark distribution in the quark gluon phase expected to be formed in ultra-relativistic heavy ion collisions. The effect of thermal masses for quarks and…

Nuclear Theory · Physics 2009-10-30 Pradip Roy , Jane Alam , Sourav Sarkar , Bikash Sinha , Sibaji Raha

We study thermal and chemical equilibration in 'infinite' hadron matter as well as in finite size relativistic nucleus-nucleus collisions using a BUU cascade transport model with resonance and string degrees-of-freedom. The 'infinite'…

Nuclear Theory · Physics 2009-11-06 E. L. Bratkovskaya , W. Cassing , C. Greiner , M. Effenberger , U. Mosel , A. Sibirtsev

We introduce a novel approach to estimate the thermodynamic pressure from heavy-ion collisions based on recently measured higher-order moments of particle multiplicities by the STAR experiment. We start with fitting the experimental results…

High Energy Physics - Phenomenology · Physics 2015-01-06 Abdel Nasser Tawfik

We present a nonperturbative computation of the equation of state of polarized, attractively interacting, nonrelativistic fermions in one spatial dimension at finite temperature. We show results for the density, spin magnetization, magnetic…

Quantum Gases · Physics 2015-12-08 A. C. Loheac , J. Braun , J. E. Drut , D. Roscher

We argue that isotropization and, consequently, thermalization of the system of gluons and quarks produced in an ultrarelativistic heavy ion collision does not follow from Feynman diagram analysis to any order in the coupling constant. We…

High Energy Physics - Phenomenology · Physics 2008-11-26 Yuri V. Kovchegov

We study local spin polarization in the relativistic hydrodynamic model. Generalizing the Wigner functions previously obtained from chiral kinetic theory by Y. Hidaka et al. [Phys. Rev. D 97, 016004 (2018)] to the massive case, we present…

High Energy Physics - Phenomenology · Physics 2021-12-28 Cong Yi , Shi Pu , Di-Lun Yang

We find the trapped surface for a collision of two sourceless shock waves in AdS$_5$ and conclude that such collisions always lead to a creation of a black hole in the bulk. Due to holographic correspondence, in the boundary gauge theory…

High Energy Physics - Theory · Physics 2015-05-14 Yuri V. Kovchegov , Shu Lin

We discuss a relation between the QCD thermodynamics obtained from a statistical analysis of particle production in heavy ion collisions at SPS and RHIC energies and recent LGT results at finite chemical potential. We show that basic…

Nuclear Theory · Physics 2016-09-08 K. Redlich , F. Karsch , A. Tawfik

The lecture provides a brief introduction of thermal field theory within imaginary time formalism, the Hard Thermal Loop perturbation theory and some of its application to the physics of the quark-gluon plasma, possibly created in…

High Energy Physics - Phenomenology · Physics 2009-09-29 Munshi G. Mustafa

Spin alignment of vector mesons in noncentral relativistic heavy ion collisions provides a novel probe of the global quark polarization and hadronization mechanism. In this paper, we discuss the spin alignment of a short-lived vector meson,…

Nuclear Theory · Physics 2022-12-28 Ziyang Li , Wangmei Zha , Zebo Tang
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