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The heating of the Sun's corona has been explained by several different mechanisms including wave dissipation and magnetic reconnection. While both have been shown capable of supplying the requisite power, neither has been used in a…

太阳与恒星天体物理 · 物理学 2018-02-20 Kai E. Yang , Dana W. Longcope , M. D. Ding , Yang Guo

Fluid dynamic approach is a workhorse for modelling collective dynamics in relativistic heavy-ion collisions. The approach has been successful in describing various features of the momentum distributions of hadrons produced in the heavy-ion…

核理论 · 物理学 2021-08-04 Iurii Karpenko

Global spin polarization of hyperons is an important observable to probe the vorticity of the quark-gluon plasma produced in heavy-ion collisions. We calculate the global polarizations of $\Lambda$, $\Xi^-$, and $\Omega^-$ in Au+Au…

核理论 · 物理学 2022-03-01 Hui Li , Xiao-Liang Xia , Xu-Guang Huang , Huan Zhong Huang

This work reports radiative transition rates and electron impact excitation rate coefficients for levels of the n= 3, 4, 5, 6, 7, 8 configurations of Ca II. The radiative data were computed using the Thomas-Fermi-Dirac central potential…

天体物理学 · 物理学 2009-11-13 M. Melendez , M. A. Bautista , N. R. Badnell

The polarization of the $\Lambda$ and $\overline\Lambda$ hyperons along the beam ($z$) direction, $P_{\rm z}$, has been measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02TeV recorded with ALICE at the Large Hadron Collider (LHC).…

核实验 · 物理学 2022-12-06 ALICE Collaboration

The Pomeron-gluon-gluon interaction is considered in the QCD-based model for the charmed baryon production in the process Pomeron + p --> \Lambda_c^+ + X. The polarization of the produced heavy quark is induced effectively through the…

高能物理 - 唯象学 · 物理学 2007-05-23 Yu. Arestov , F. R. A. Simao

STAR collaboration at RHIC has recently measured the polarization of $\Lambda$ hyperons in non-central heavy ion collisions in the RHIC Beam Energy Scan (BES) program. The magnitude of the polarization was found to decrease from few…

核理论 · 物理学 2019-01-23 Iurii Karpenko , Francesco Becattini

$\Lambda$-deuteron two-particle momentum correlation functions, to be measured in high-energy heavy-ion collisions, are investigated. In particular, the question is addressed whether such correlations can serve as an additional and…

核理论 · 物理学 2020-09-09 J. Haidenbauer

We discuss Lambda polarization in semi-inclusive proton-proton collisions, with one of the protons longitudinally polarized. The hyperfine interaction responsible for the $\Delta$-$N$ and $\Sigma$-$\Lambda$ mass splittings gives rise to…

高能物理 - 唯象学 · 物理学 2010-02-17 C. Boros , J. T. Londergan , A. W. Thomas

Using the local equilibrium density operator, we develop a geometry-informed linear response theory that takes into account the parameterization of the freezeout hypersurface before the gradient expansion is carried out. Assuming local…

高能物理 - 唯象学 · 物理学 2025-09-12 Andrea Palermo , Masoud Shokri

It is very well known that the fraction of energy in a hadron collision going into electromagnetic particles (electrons and photons, including those from decays) has a large impact on the number of muons produced in air shower cascades.…

高能物理 - 唯象学 · 物理学 2023-05-31 Sebastian Baur , Hans Dembinski , Matias Perlin , Tanguy Pierog , Ralf Ulrich , Klaus Werner

Constraining the frequency of energy deposition in magnetically-closed active region cores requires sophisticated hydrodynamic simulations of the coronal plasma and detailed forward modeling of the optically-thin line-of-sight integrated…

太阳与恒星天体物理 · 物理学 2021-10-13 W. T. Barnes , S. J. Bradshaw , N. M. Viall

We conducted a high-resolution numerical simulation of the solar corona above a stable active region. The aim is to test the field-line braiding mechanism for a sufficient coronal energy input. We also check the applicability of scaling…

太阳与恒星天体物理 · 物理学 2018-05-17 Philippe-A. Bourdin , Sven Bingert , Hardi Peter

We study the relationship between implosive motions in a solar flare, and the energy redistribution in the form of oscillatory structures and particle acceleration. The flare SOL2012-03-09T03:53 (M6.4) shows clear evidence for an…

太阳与恒星天体物理 · 物理学 2015-06-17 P. J. A. Simões , L. Fletcher , H. S. Hudson , A. J. B. Russell

Two-dimensional Particle-In-Cell simulations are used to explore collisionless shock acceleration in the corona plasma surrounding the compressed core of an inertial confinement fusion pellet. We show that an intense laser pulse interacting…

等离子体物理 · 物理学 2021-03-17 E. Boella , R. Bingham , R. A. Cairns , P. Norreys , R. Trines , R. Scott , M. Vranic , N. Shukla , L. O. Silva

The global and local spin polarization measurements of $\Lambda$ ($\bar{\Lambda}$) hyperons by STAR and ALICE Collaborations open up an immense interest in investigating the spin polarization dynamics in heavy-ion collisions. Recent studies…

高能物理 - 唯象学 · 物理学 2025-05-30 Bhagyarathi Sahoo , Captain R. Singh , Raghunath Sahoo

Aims. The goal is to employ a 3D magnetohydrodynamics (MHD) model including spectral synthesis to model the corona in an observed solar active region. This will allow us to judge the merits of the coronal heating mechanism built into the 3D…

太阳与恒星天体物理 · 物理学 2017-09-19 Ph. -A. Bourdin , S. Bingert , H. Peter

With a Yang-Mills flux-tube initial state and a high resolution (3+1)D Particle-in-Cell Relativistic (PICR) hydrodynamics simulation, we calculate the $\Lambda$ polarization for different energies. The origination of polarization in high…

核理论 · 物理学 2017-03-16 Yilong Xie , Dujuan Wang , László P. Csernai

Nucleon-ion and ion-ion collisions at non relativistic bombarding energies can be described by means of Monte Carlo approaches, such as those based on the Quantum Molecular Dynamics (QMD) model. We have developed a QMD code, to simulate the…

核理论 · 物理学 2008-09-14 M. V. Garzelli

Large vorticities in the Quark-Gluon Plasma produced in peripheral collisions studied by the STAR collaboration at the RHIC facility have been deduced from observations of polarizations of $\Lambda$ and $\overline{\Lambda}$ hyperons.…

高能物理 - 理论 · 物理学 2020-01-08 Brett McInnes