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We present a new parton model approach for hadron-hadron interactions and, in particular, for the initial stage of nuclear collisions at very high energies (RHIC, LHC and beyond). The most important aspect of our approach is a…

High Energy Physics - Phenomenology · Physics 2009-10-31 H. J. Drescher , M. Hladik , S. Ostapchenko , T. Pierog , K. Werner

Surrogate models, crucial for approximating complex simulation data across sciences, inherently carry uncertainties that range from simulation noise to model prediction errors. Without rigorous uncertainty quantification, predictions become…

Machine Learning · Statistics 2025-04-07 Yuhan Duan , Xin Zhao , Neng Shi , Han-Wei Shen

Making use of the fact that the collective modes associated with the spontaneous (static and dynamic) violation of gauge invariance in atomic nuclei (pairing rotations and pairing vibrations) are amenable to a simple, quite accurate nuclear…

Nuclear Theory · Physics 2014-04-07 Gregory Potel , Andrea Idini , Francisco Barranco , Enrico Vigezzi , Ricardo A. Broglia

Nucleon-nucleon (NN) cross sections are evaluated in neutron-rich matter using a scaling model according to nucleon effective masses. It is found that the in-medium NN cross sections are not only reduced but also have a different isospin…

Nuclear Theory · Physics 2008-11-26 Bao-An Li , Lie-Wen Chen

The weak mixing angle is a fundamental parameter of the electroweak theory of the standard model whose measurement in the low-energy regime is still not precisely determined. Different probes are sensitive to its value, among which atomic…

High Energy Physics - Phenomenology · Physics 2024-08-20 M. Atzori Corona , M. Cadeddu , N. Cargioli , F. Dordei , C. Giunti

Interference effect of neutron capture cross section between the compound and direct processes is investigated. The compound process is calculated by resonance parameters and the direct process by the potential mode. The interference effect…

Nuclear Theory · Physics 2017-12-06 Futoshi Minato , Tokuro Fukui

The neutron-rich isotopes with 30 $\leq$ Z $\leq$ 45 are thought to be synthesised in neutrino-driven winds after the collapse of a massive star. This nucleosynthesis scenario, called the weak r-process, is studied using nuclear reaction…

This work successfully generates an uncertainty-aware surrogate model of the EuroPED plasma pedestal model using the Bayesian neural network with noise contrastive prior (BNN-NCP) technique. This model is trained using data from the JET-ILW…

Plasma Physics · Physics 2024-09-04 A. Panera Alvarez , A. Ho , A. Jarvinen , S. Saarelma , S. Wiesen , JET Contributors , the AUG team

Reactor physics aims at studying the neutron population in a reactor core under the influence of feedback mechanisms, such as the Doppler temperature effect. Numerical schemes to calculate macroscopic properties emerging from such coupled…

Statistical Mechanics · Physics 2022-12-28 Benjamin Dechenaux , Thomas Delcambre , Eric Dumonteil

Understanding how nuclear size evolves with the number of protons and neutrons tests our models of strongly interacting matter. The nuclear charge (and proton) radii accessible through electromagnetic probes carry fundamental information on…

Nuclear Theory · Physics 2026-03-20 A. J. Smith , K. Godbey , C. Hebborn , W. Nazarewicz , F. M. Nunes , P. -G. Reinhard

Background: Effective interactions for elastic nucleon-nucleus scattering from first principles require the use of the same nucleon-nucleon interaction in the structure and reaction calculations, as well as a consistent treatment of the…

Nuclear Theory · Physics 2021-05-26 R. B. Baker , M. Burrows , Ch. Elster , K. D. Launey , P. Maris , G. Popa , S. P. Weppner

Accurate determination of fusion-evaporation reaction cross section is important in experimental nuclear physics studies. In this study, by using artificial neural network (ANN) method, we have estimated the cross section values for…

Nuclear Experiment · Physics 2020-01-08 Serkan Akkoyun

Background: Eclipse effect of the neutron and proton in a deuteron target is essential to correctly describe high-energy deuteron scattering. The nucleus-deuteron scattering needs information not only on the nucleus-proton but also the…

Nuclear Theory · Physics 2020-12-02 W. Horiuchi , Y. Suzuki , T. Uesaka , M. Miwa

The nuclear reaction induced by photon is one of the important tools in the investigation of atomic nuclei. In the reaction, a target material is bombarded by photons with high-energies in the range of gamma-ray energy range. In the…

Nuclear Theory · Physics 2020-03-17 S. Akkoyun , H. Kaya

The decision whether a measured distribution complies with an equidistribution is a central element of many biostatistical methods. High throughput differential expression measurements, for instance, necessitate to judge possible…

Disordered Systems and Neural Networks · Physics 2007-05-23 Thorsten Poeschel , Jan A. Freund

Background: Muon nuclear capture is a reaction between a muon and a proton inside a nucleus through weak interactions. This reaction results in the formation of an excited nucleus, which subsequently de-excites by emitting several…

A new statistical method for systematizing the nuclei fission fragments, investigation of their mass and charge spectra and neutron fission parameters has been suggested. In proposed method, the mass and charge yields of nucleons are…

Nuclear Theory · Physics 2015-06-04 V. T. Maslyuk , O. A. Parlag , O. I. Lendyel , T. I. Marynets , M. I. Romanyuk

A measurement of 74Ge(p,gamma)75As at low proton energies, inside the astrophysically relevant energy region, is important in several respects. The reaction is directly important as it is a bottleneck in the reaction flow which produces the…

We discuss the connection between absorption, averages and fluctuations in nuclear reactions. The fluctuations in the entrance channel result in the compound nucleus, Hauser-Feshbach, cross section, the fluctuations in the intermediate…

Nuclear Theory · Physics 2008-11-26 M. S. Hussein

The influence of the boundary conditions used in the Wigner-Seitz (WS) approximation applied to the neutron star inner crust is examined. The generalized energy functional method which includes the neutron and proton pairing correlations is…

Nuclear Theory · Physics 2016-09-08 M. Baldo , E. E. Saperstein , S. V. Tolokonnikov