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A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction $ \pi N \to \pi N \gamma$ at low energies. The $\Delta(1232)$ degrees of freedom are incorporated in a way consistent with both,…

核理论 · 物理学 2009-11-06 A. Mariano , G. López Castro

We reinterpret the dilepton emission rate from a hadronic gas expected to be produced in heavy ion collisions in terms of the spectral functions available from the $e^+e^-$ annihilation and the $\tau$ lepton decays experiments. We take into…

高能物理 - 唯象学 · 物理学 2015-06-25 Zheng Huang

We consider Exclusive Double Diffractive Events (EDDE) as a powerfull tool to study the picture of the $pp$ interaction. Calculations of the cross-sections for the process $p+p\to p+M+p$ are presented in the convenient form for further…

高能物理 - 唯象学 · 物理学 2008-11-26 V. A. Petrov , R. A. Ryutin

A search for the critical behavior of strongly interacting matter was performed at the NA61/SHINE experiment by studying event-by-event fluctuations of multiplicity and transverse momentum of charged hadrons produced in inelastic p+p…

核实验 · 物理学 2019-05-02 Daria Prokhorova

We present an open-source code for the simulation of electron and ion transport for user-defined gas mixtures with static uniform electric and magnetic fields. The program provides microscopic interaction simulation and is interfaced with…

计算物理 · 物理学 2021-09-14 Michele Renda , Dan Andrei Ciubotaru , Calin Iulian Banu

We describe a new version of the 5D, exact, polarised, Bethe-Heitler event generator of $\gamma$-ray conversions to $e^+e^-$, developed in the context of the HARPO project, that is able to simulate successive events with different photon…

高能物理 - 唯象学 · 物理学 2018-06-05 Denis Bernard

The production of $\eta'$ mesons in the reactions $pp\to pp\eta'$ and $pn\to pn\eta' $ at threshold-near energies is analyzed within a covariant effective meson-nucleon theory. The description of cross section and angular distributions of…

核理论 · 物理学 2008-11-26 L. P. Kaptari , B. Kampfer

Within the framework of nonrelativistic quantum chromodynamics, this study examines the electroproduction processes $e+p\to e+B_c+\overline{c}+b$, $e+p\to e+B_s+\overline{s}+b$, and $e+p\to e+D_s+\overline{c}+s$ at lepton-hadron colliders.…

高能物理 - 唯象学 · 物理学 2025-01-03 Qiwei Hu , Cong-Feng Qiao , Li-Ping Sun

A set of programs for the numerical simulation of the diffusion decomposition processes was developed by using simulation methods, kinetic and particle method. The complex has been validated on the model system Ni-Al by the growth of -phase…

材料科学 · 物理学 2022-08-18 A. V. Sagalovych , V. V. Sagalovich , V. N. Chabanovsky

Aimed at the simulation, design, and interpretation of advanced pulse experiments crossing the boundaries between nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR), including the rapidly emerging, hybrid discipline…

Dielectron mass spectra are examined for various nuclear reactions recently measured by the DLS collaboration. A detailed description is given of all dilepton channels included in the transport model UrQMD 1.0, i.e. Dalitz decays of…

核理论 · 物理学 2016-08-15 C. Ernst , S. A. Bass , M. Belkacem , H. Stöcker , W. Greiner

The deuteron charge - exchange reaction pD->n(pp) for the low values of momentum transfer and small excitation energies of final pp - pair is considered in the framework of Bethe - Salpeter approach. The method of calculation of the…

核理论 · 物理学 2008-11-26 S. M. Dorkin , L. P. Kaptari , B. Kaempfer , S. S. Semikh

For charged systems in heterogeneous dielectric media, a key obstacle for molecular dynamics (MD) simulations is the need to solve the Poisson equation in the media. This obstacle can be bypassed using MD methods that treat the local…

软凝聚态物质 · 物理学 2013-09-27 Vikram Jadhao , Francisco J. Solis , Monica Olvera de la Cruz

The pseudorapidity density (dN/deta) for p+p, p+A and A+A(B) collisions, and the mean multiplicity <Nch> for ee, ep, and p+p collisions, are studied for an inclusive range of beam energies (Root_s). Characteristic scaling patterns are…

The $d(e,e'\pi^+)$ reaction in the parallel kinematics has been investigated using a dynamical model of pion electroproduction on the nucleon. A unitary $\pi NN$ model has been used in order to examine the effects due to the final…

核理论 · 物理学 2009-11-07 K. Hafidi , T. -S. H. Lee

Realistic vacuum $\pi\pi$ interactions are employed to investigate thermal $\pi^+\pi^-$ emission spectra from the late stages of heavy-ion reactions at ultrarelativistic energies. Hadronic in-medium effects, including many-body $\rho$-meson…

高能物理 - 唯象学 · 物理学 2009-11-10 R. Rapp

A full calculation of lepton-pair angular characteristics is carried out for $e^+e^-$ pairs created in $pp$, $pn$ and $pd$ collisions at intermediate energies. It is demonstrated that the proposed new observable, the dilepton decay…

核理论 · 物理学 2009-10-28 E. L. Bratkovskaya , W. Cassing , U. Mosel , O. V. Teryaev , A. I. Titov , V. D. Toneev

The transverse momentum spectra and integrated yields of anti-$\Sigma$ hyperons ($\overline{\Sigma}^{\pm}$) have been measured in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE experiment. Measurements are…

核实验 · 物理学 2026-02-19 ALICE Collaboration

We develop a mathematical model for dynamic simulation of an alkaline electrolyzer plant. The plant includes the stack, a water recirculation system and hydrogen storage with compressor. We model each component of the system with mass and…

系统与控制 · 电气工程与系统科学 2024-07-30 Nicola Cantisani , Josefine Dovits , John Bagterp Jørgensen

We analyse the experimental data on near threshold $\pi$, $\eta$, $\omega$, $\eta'$ and $K^+$ production from $pp$ collisions and show that all information gained so far is compatible with approximately constant production matrix elements…

核理论 · 物理学 2007-05-23 A. Sibirtsev , W. Cassing