【摘 要】
:
The transverse momentum spectra of different types of particles produced in central and peripheral gold-gold (Au-Au) and inelastic proton-proton (pp) collisions
【机 构】
:
Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devic
论文部分内容阅读
The transverse momentum spectra of different types of particles produced in central and peripheral gold-gold (Au-Au) and inelastic proton-proton (pp) collisions at the Relativistic Heavy Ion Collider, as well as in central and peripheral lead-lead (Pb-Pb) and pp collisions at the Large Hadron Collider, are analyzed by the multi-compo-nent standard (Boltzmann-Gibbs, Fermi-Dirac, and Bose-Einstein) distributions. The obtained results from the standard distribution give an approximate agreement with the measured experimental data by the STAR, PHENIX, and ALICE Collaborations. The behavior of the effective (kinetic freeze-out) temperature, transverse flow velocity, and kinetic freeze-out volume for particles with different masses is obtained, which observes the early kinetic freeze-out of heavier particles as compared to the lighter particles. The parameters of emissions of different particles are observed to be different, which reveals a direct signature of the mass-dependent differential kinetic freeze-out. It is also observed that the peripheral nucleus-nucleus (AA) and pp collisions at the same center-of-mass energy per nucleon pair are in good agreement in terms of the extracted parameters.
其他文献
This study presents a benchmark evaluation of the new ENDF/B-Ⅷ.0 nuclear data library for the Organization for Economic Co-operation and Develop-ment/Nuclear E
The key issue in accelerating method of char-acteristics (MOC) transport calculations is in obtaining a completely equivalent low-order neutron transport or dif
To effectively replace the isotope radiation source in litho-density logging, this study presents a method for measuring the formation density and photo-electri
This study presents the RF design of a linear accelerator (linac) operated in single-bunch mode. The accelerator is powered by a compressed RF pulse produced fr
本研究以紫花桔梗白花桔梗为材料,调查了种子性状、地上部主要农艺性状、根部性状及有效成分含量。结果表明:它们之间大部分种子性状和部分地上部性状以及有效成分含量含量上有明显差异;而在根部性状上无明显差异。在种子性状方面白花桔梗中除了个别种质资源之外,种子长度、宽度和千粒质量均小于紫花桔梗。在种子厚度方面,紫、白花桔梗间无明显差异。在地上部农艺性状中,紫、白花桔梗的株高和茎粗无明显差异;主茎叶数、分枝数
Heavy water-moderated molten salt reactors (HWMSRs) are novel molten salt reactors that adopt heavy water rather than graphite as the moderator while employing
A high-gradient radiofrequency (RF) gun oper-ated in continuous-wave (CW) mode is required in various accelerating applications. Due to the high RF power loss,