The production of exotic hadron $\rm X(3872)$ in $pp$ collisions at $\sqrt{s}=2.76\,\mathrm{TeV}$ is investigated by the parton and cascade model PACIAE this work. In simulation final partonic state (quark matter, QM) hadronic (hadron HM) are continuously processed recorded. compact tetraquark loose molecular are, respectively, coalesced recombined QM HM with quantum statistical mechanics inspired dynamically constrained phase-space coalescence model. formation time, velocity temperature...

In this work we investigate the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi></a:mrow></a:math> production in proton-proton collisions at center-of-mass energy <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mo>(</b:mo><b:msqrt><b:mi>s</b:mi></b:msqrt><b:mo>)</b:mo></b:math> equal to 2.76, 5.02, 7, 8, and 13 TeV with parton hadron cascade model PACIAE 2.2a. It is based on PYTHIA but extended considering partonic hadronic...

We develop a parton and hadron cascade model paciae 3.0 based on pythia 6.428 the 2.2 program series for nuclear collisions. The original simulation framework composed of initial partonic state, rescattering stage, hadronization hadronic is renamed C-simulation high-energy ($\sqrt{{s}_{NN}}\ensuremath{\ge}3$ GeV) A B-simulation without designed collisions, too. In addition, an A-simulation introduced low-energy ($\sqrt{{s}_{NN}}<3$ which developed in degree freedom only. framework,...

We study the behavior of four types vorticities in non-central Au+Au collisions at energies $\sqrt{S_{NN}}$ = 5--200 GeV using a microscopic transport model PACIAE. The results show that decay faster lower energy and smaller impact parameter. non-monotonic dependence initial on collision is reconfirmed turning point 10-15 for different vorticities. global $\Lambda$ polarization 7.7--200 reproduced by introducing an density freeze-out criterion.

The production of exotic hadron <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi mathvariant="normal">X</a:mi><a:mo>(</a:mo><a:mn>3872</a:mn><a:mo>)</a:mo></a:mrow></a:math> in <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:mi>p</c:mi><c:mi>p</c:mi></c:mrow></c:math> collisions at <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"><d:mrow><d:msqrt><d:mi>s</d:mi></d:msqrt><d:mo>=</d:mo><d:mn>2.76</d:mn><d:mspace...

The parton and hadron cascade model {\footnotesize PACIAE} is employed to confirm the BESIII newest observation of glueball-like particle $\rm X(2370)$ production in $e^+e^-$ collisions at $\sqrt{s}=4.95\,\mathrm{GeV}$. We coalesce glueball state with two gluons simulated partonic final by Dynamically Constrained Phase-space Coalescence ({\footnotesize DCPC}) model. Alternative configuration molecular recombined hadronic $\pi^{+},\pi^{-},K^{+}, K^{-},K_{S}^{0},K_{S}^{0}$ $\eta'$ DCPC}...

Inspired by the BESIII newest observation of X(2370) glueball-like particle, we search its productions in both $e^+e^-$ collisions at $\sqrt{s}=$ 4.95 GeV and proton-proton (pp) 13 TeV with a parton hadron cascade model PACIAE. In this model, final partonic state (FPS) hadronic (FHS) are consecutively simulated recorded. The glueball- or tetraquark-state is then, respectively, recombined two gluons four quarks $ss\bar{s}\bar{s}$ FPS using quantum statistical mechanics inspired dynamically...

Inspired by the BESIII newest observation of X(2370) glueball-like particle, we search its productions in both <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>e</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>e</a:mi><a:mo>−</a:mo></a:msup></a:math> collisions at <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msqrt><c:mi>s</c:mi></c:msqrt><c:mo>=</c:mo><c:mn>4.95</c:mn><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>GeV</c:mi></c:math>...

Parton And-hadron China Institute of Atomic Energy (PACIAE) is a multipurpose Monte Carlo event generator developed to describe wide range high-energy collisions, including lepton-lepton, lepton-hadron, lepton-nucleus, hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. It built based on the PYTHIA program, incorporates parton hadron cascades address nuclear medium effects. PACIAE 4.0 new generation model surpassing version 3.0. In 4.0, old fixed-format FORTRAN 77 code has been...

We have systematically studied the connection (correspondence) between hadrons and their quark-component nuclear modification factors flavor (mass) ordering at both parton hadron levels in nucleus-nucleus collisions energies available CERN Large Hadron Collider, using paciae model. It turns out that correspondence mass generally hold, irrespective of rapidity, centrality, reaction energy, collision system size. The final hadronic state show clear ordering, which should be further...

We calculate four types of initial vorticities in Au+Au collisions at energies $ \sqrt{S_{NN}} = 5--200 GeV using a microscopic transport model PACIAE. Our simulation shows the non-monotonic dependence on collision energies. The energy turning point is around 10-15 for different but not sensitive to impact parameter.

The lepton charge asymmetry in $W^\pm$ production the nuclear collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV is investigated with a parton and hadron cascade model PACIAE. Recently published ALICE ATLAS data of are well reproduced. An interesting linear scaling behavior observed as function collision system valence quark number among different size systems TeV. This may serve an additional constraint on PDF (nPDF) extractions.

We introduce a parton and hadron cascade model PACIAE 3.0 based on PYTHIA 6.428 the 2.2 program series. The simulation framework of C-, B-, A-loops are designed for high energy ($\sqrt{s_{NN}}\geq 3$ GeV) low ($\sqrt{s_{NN}}<3$ nuclear collisions, respectively, in 3.0. In C-loop simulation, parton-parton inelastic scattering processes added partonic rescattering process. single string structure multiple interaction mechanism have been introduced investigating strangeness enhancement C-...

In this work we investigate the $J/\psi$ production in proton-proton collisions at center-of-mass energy ($\sqrt{s}$) equal to 2.76, 5.02, 7, 8 and 13 TeV with a parton hadron cascade model PACIAE 2.2a. It is based on PYTHIA but extended considering partonic hadronic rescatterings before after hadronization, respectively. sector quantum chromodynamics processes are selected specially bias factor proposed correspondingly. The calculated total cross sections, differential sections as function...

We calculate four types of initial vorticities in Au[Formula: see text][Formula: text]Au collisions at energies [Formula: text]–200[Formula: text]GeV using a microscopic transport model PACIAE. Our simulation shows the nonmonotonic dependence on collision energies. The energy turning point is around 10–15[Formula: for different but not sensitive to impact parameter.

In this paper, the centrality dependent $\Zn$ and $\Wpm$ production isospin effect in are investigated with a parton hadron cascade model PACIAE Pb--Pb collisions at $\sNN=5.02$~TeV. ALICE data of $\sNN=5.02$~TeV found to be reproduced fairly well. The prediction on same collision system is given as An interesting observed exploring charge asymmetry between $\Wp$ $\Wm$ function number valence $u$- $d$-quarks varied from small large systems center-of-mass energy 5.02 TeV. results serve...

We have systematically studied the connection between hadron and its quark component nuclear modification factors flavor (mass) ordering at both parton levels in nucleus-nucleus collisions LHC energies by PACIAE model. It turns out that these two physical phenomena explored our last publication (J. Phys. G 49 065104, 2022) are generally held, irrespective of rapidity, centrality, reaction energy, collision system size. The mass level factor seems to be really existed, which should further...

The lepton charge asymmetry in $W^\pm$ production the nuclear collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV is investigated with a parton and hadron cascade model PACIAE. Recently published ALICE ATLAS data of are well reproduced. An interesting linear scaling behavior observed as function collision system valence quark number among different size systems TeV. This may serve an additional constraint on PDF (nPDF) extractions.