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We derive scaling laws that connect certain macroscopic observables of strange quark stars with key microscopic properties of self-bound quark matter, such as the energy per baryon at zero pressure and the strength of repulsive…

核理论 · 物理学 2025-06-26 G. Lugones , A. G. Grunfeld

The observations of compact star inspirals from LIGO/Virgo provide a valuable tool to study the highly uncertain equation of state (EOS) of dense matter at the densities in which the compact stars reside. It is not clear whether the merging…

高能天体物理现象 · 物理学 2021-08-19 Zhiqiang Miao , Jin-Liang Jiang , Ang Li , Lie-Wen Chen

We report results of a new global next-to-leading order fit of parton distribution functions in which cuts on W and Q are relaxed, thereby including more data at high values of x. Effects of target mass corrections (TMCs), higher twist…

高能物理 - 唯象学 · 物理学 2010-05-28 A. Accardi , M. E. Christy , C. E. Keppel , W. Melnitchouk , P. Monaghan , J. G. Morfin , J. F. Owens

We present the final analysis of the light and strange hadron spectra from a full QCD lattice simulation with two degenerate dynamical sea quark flavours at $\beta = 5.6$ on a $16^3 \times 32$ lattice. Four sets of sea quark masses…

高能物理 - 格点 · 物理学 2016-08-25 N. Eicker , U. Glässner , S. Güsken , H. Hoeber , P. Lacock , Th. Lippert , K. Schilling , A. Spitz , Th. Struckmann , P. Ueberholz , J. Viehoff

We report strong and rapid X-ray variability found from the super-Eddington accreting quasar SDSS J081456.10+532533.5 at $z=0.1197$. It has a black-hole mass of $2.7\times10^{7}{M_{\odot}}$ and a dimensionless accretion rate of $\approx4$…

高能天体物理现象 · 物理学 2023-06-14 Jian Huang , Bin Luo , W. N. Brandt , Pu Du , Gordon P. Garmire , Chen Hu , Hezhen Liu , Qingling Ni , Jian-Min Wang

We study the probability distribution function (PDF) of the mass density in simulations of supersonic turbulence with properties appropriate for molecular clouds. For this study we use Athena, a new higher-order Godunov code. We find there…

天体物理学 · 物理学 2008-09-23 M. Nicole Lemaster , James M. Stone

Intermittency in MHD turbulence has been analyzed using high resolution 2D numerical simulations. We show that the Probability Distribution Functions (PDFs) of the fluctuations of the Elsasser fields, magnetic field and velocity field…

混沌动力学 · 物理学 2015-06-26 L. Sorriso-Valvo , V. Carbone , P. Veltri , H. Politano , A. Pouquet

We reexamine, within the nonrelativistic constituent quark model (NRCQM), a recent claim that the current data on the strangeness form factors indicates that the uuds\bar{s} component in the proton is such that the uuds subsystem has the…

核理论 · 物理学 2011-12-22 Alvin Kiswandhi , Hao-Chun Lee , Shin Nan Yang

An effective model with constituent quarks as fundamental degrees of freedom is used to predict the relative strangeness production pattern in both high energy elementary and heavy ion collisions. The basic picture is that of the…

高能物理 - 唯象学 · 物理学 2009-11-07 F. Becattini , G. Pettini

We discuss the renormalization of gauge-invariant transverse-momentum dependent (TMD), i.e., unintegrated, parton distribution functions (PDFs) and carry out the calculation of their anomalous dimension at one loop. We show that in the…

高能物理 - 唯象学 · 物理学 2008-10-01 N. G. Stefanis , I. O. Cherednikov

Large momentum effective field theory provides a new direction for lattice QCD calculations of hadronic structure functions, such as parton distribution functions (PDFs), meson distribution amplitudes, and so on, directly with…

高能物理 - 唯象学 · 物理学 2018-08-03 Xiaonu Xiong , Thomas Luu , Ulf-G. Meißner

From a systematic analysis of the energy-dependence of four antibaryon-to-baryon ratios relative to the antikaon-to-kaon ratio, we propose an alternative approach determining the strange-quark chemical potential ($\mu_{\mathrm{s}}$). It is…

高能物理 - 唯象学 · 物理学 2017-08-03 Abdel Nasser Tawfik , Magda Abdel Wahab , Hayam Yassin , Eman R. Abo Elyazeed , Hadeer M. Nasr El Din

The quasiparticle model is extended to investigate the properties of strange quark matter in a strong magnetic field at finite densities. For the density-dependent quark mass, self-consistent thermodynamic treatment is obtained with an…

高能物理 - 唯象学 · 物理学 2012-08-08 Xin-Jian Wen , Shou-Zheng Su , Dong-Hong Yang , Guang-Xiong Peng

Fluctuations of conserved quantities, such as baryon, electric charge and strangeness number, are sensitive observables in heavy-ion collisions to search for the QCD phase transition and critical point. In this paper, we performed a…

核实验 · 物理学 2017-07-17 Chang Zhou , Ji Xu , Xiaofeng Luo , Feng Liu

Using the O(a) Symanzik improved action an estimate is given for the strange quark mass for unquenched (n_f=2) QCD. The determination is via the axial Ward identity (AWI) and includes a non-perturbative evaluation of the renormalisation…

高能物理 - 格点 · 物理学 2008-11-26 M. Göckeler , R. Horsley , A. C. Irving , D. Pleiter , P. E. L. Rakow , G. Schierholz , H. Stüben , J. M. Zanotti

We present a detailed Lattice QCD study of the unpolarized isovector quark Parton Distribution Function (PDF) using large-momentum effective theory framework. We choose a quasi-PDF defined by a spatial correlator which is free from mixing…

Parametric rolling is a parametric excitation phenomenon caused by GM variation in waves. There are a lot of studies of the estimation the conditions, the occurrence, and the amplitude of parametric rolling. On the other hand, there are…

流体动力学 · 物理学 2024-07-04 Keiji Katsumura , Leo Dostal , Taiga Kono , Yuuki Maruyama , Masahiro Sakai , Atsuo Maki

In this work radiative corrections in the total hadronic decay rate of the tau-lepton and some moments of its differential distributions are studied employing perturbative QCD and the operator product expansion. We calculate quadratic quark…

高能物理 - 唯象学 · 物理学 2008-11-26 K. G. Chetyrkin , J. H. Kühn , A. A. Pivovarov

This article is concerned with the rigorous validation of anomalous spreading speeds in a system of coupled Fisher-KPP equations of cooperative type. Anomalous spreading refers to a scenario wherein the coupling of two equations leads to…

偏微分方程分析 · 数学 2015-07-22 Matt Holzer

We study long-distance singularities governing different physical quantities involving massless partons in perturbative QCD by using factorisation in terms of Wilson-line correlators. By isolating the process-independent hard-collinear…

高能物理 - 唯象学 · 物理学 2019-11-22 Giulio Falcioni , Einan Gardi , Calum Milloy