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In this talk I'll review the present status of charged particle multiplicity measurements from heavy-ion collisions. The characteristic features of multiplicity distributions obtained in Au+Au collisions will be discussed in terms of…

Nuclear Experiment · Physics 2009-11-10 B. B. Back

A hybrid mesoscopic multi-particle collision model is used to study diffusion-influenced reaction kinetics. The mesoscopic particle dynamics conserves mass, momentum and energy so that hydrodynamic effects are fully taken into account.…

Chemical Physics · Physics 2007-05-23 Kay Tucci , Raymond Kapral

Quantum critical systems with multiple dynamics possess not only one but several time scales, tau_i ~ xi^(z_i), which diverge with the correlation length xi. We investigate how scaling predictions are modified for the simplest case of…

Strongly Correlated Electrons · Physics 2012-09-11 Tobias Meng , Achim Rosch , Markus Garst

We include in statistical model calculations the facts that in the nuclear multifragmentation process the fragments are produced within a given volume and have a finite size. The corrections associated with these constraints affect the…

Nuclear Theory · Physics 2008-11-26 S. R. Souza , R. Donangelo , W. G. Lynch , M. B. Tsang

This paper presents the energy dependence of multiplicity and net-electric charge fluctuations in p+p interactions at beam momenta 20, 31, 40, 80, and 158 GeV/c. Results are corrected for the experimental biases and quantified with the use…

High Energy Physics - Experiment · Physics 2025-03-18 NA61/SHINE , : , H. Adhikary , P. Adrich , K. K. Allison , N. Amin , E. V. Andronov , I. -C. Arsene , M. Bajda , Y. Balkova , D. Battaglia , A. Bazgir , S. Bhosale , M. Bielewicz , A. Blondel , M. Bogomilov , Y. Bondar , A. Borucka , A. Brandin , W. Bryliński , J. Brzychczyk , M. Buryakov , A. F. Camino , M. Ćirković , M. Csanád , J. Cybowska , T. Czopowicz , C. Dalmazzone , N. Davis , A. Dmitriev , P. von Doetinchem , W. Dominik , J. Dumarchez , R. Engel , G. A. Feofilov , L. Fields , Z. Fodor , M. Friend , M. Gaździcki , O. Golosov , V. Golovatyuk , M. Golubeva , K. Grebieszkow , F. Guber , S. N. Igolkin , S. Ilieva , A. Ivashkin , A. Izvestnyy , N. Kargin , N. Karpushkin , E. Kashirin , M. Kiełbowicz , V. A. Kireyeu , R. Kolesnikov , D. Kolev , Y. Koshio , V. N. Kovalenko , S. Kowalski , B. Kozłowski , A. Krasnoperov , W. Kucewicz , M. Kuchowicz , M. Kuich , A. Kurepin , A. László , M. Lewicki , G. Lykasov , V. V. Lyubushkin , M. Maćkowiak-Pawłowska , Z. Majka , A. Makhnev , B. Maksiak , A. I. Malakhov , A. Marcinek , A. D. Marino , H. -J. Mathes , T. Matulewicz , V. Matveev , G. L. Melkumov , A. Merzlaya , Ł. Mik , S. Morozov , Y. Nagai , T. Nakadaira , M. Naskręt , S. Nishimori , A. Olivier , V. Ozvenchuk , O. Panova , V. Paolone , O. Petukhov , I. Pidhurskyi , R. Płaneta , P. Podlaski , B. A. Popov , B. Pórfy , D. S. Prokhorova , D. Pszczel , S. Puławski , J. Puzović , R. Renfordt , L. Ren , V. Z. Reyna-Ortiz , D. Röhrich , E. Rondio , M. Roth , Ł. Rozpłochowski , B. T. Rumberger , M. Rumyantsev , A. Rustamov , M. Rybczynski , A. Rybicki , D. Rybka , K. Sakashita , K. Schmidt , A. Yu. Seryakov , P. Seyboth , U. A. Shah , Y. Shiraishi , A. Shukla , M. Słodkowski , P. Staszel , G. Stefanek , J. Stepaniak , M. Strikhanov , Ł. Świderski , J. Szewiński , R. Szukiewicz , A. Taranenko , A. Tefelska , D. Tefelski , V. Tereshchenko , R. Tsenov , L. Turko , T. S. Tveter , M. Unger , M. Urbaniak , F. F. Valiev , D. Veberič , V. V. Vechernin , O. Vitiuk , V. Volkov , A. Wickremasinghe , K. Witek , K. Wójcik , O. Wyszyński , A. Zaitsev , E. Zherebtsova , E. D. Zimmerman , A. Zviagina , R. Zwaska

The energy and system size dependence of pseudorapidity ($\eta$) and multiplicity distributions of photons are measured in the region -2.3 $\leq$ $\eta$ $\leq$ -3.7 for Cu + Cu collisions at $\sqrt{s_{NN}}$ = 200 and 62.4 GeV. Photon…

Nuclear Experiment · Physics 2008-11-26 Monika Sharma , Sunil Dogra , Neeraj Gupta

We study the energy dependence of collective (hydrodynamic-like) nuclear matter flow in 400-1970 A MeV Ni+Au and 1000-1970 A MeV Ni+Cu reactions. The flow increases with energy, reaches a maximum, and then gradually decreases at higher…

Nuclear Experiment · Physics 2009-10-30 Jerry Chance , the EOS-Collaboration

Transport properties of arrays of metallic quantum dots are governed by the distance-dependent exchange coupling between the dots. It is shown that the effective value of the exchange coupling, as measured by the charging energy per dot,…

Quantum Physics · Physics 2007-05-23 Jiaxiang Wang , Sabre Kais , F. Remacle , R. D. Levine

The $\phi$ meson productions in $Au+Au$ and/or $Pb+Pb$ collisions at AGS, SPS, RHIC, and LHC energies have been studied systematically with a hadron and string cascade model LUCIAE. After considering the energy dependence of the model…

Nuclear Theory · Physics 2014-11-18 Ben-Hao Sa , Zhong-Qi Wang , Xu Cai , Dai-Mei Zhou , C. Kobdaj , Yu-Peng Yan

The principle of energy conservation leads to a generalized choice of transition probability in a piecewise adiabatic representation of quantum(-classical) dynamics. Significant improvement (almost an order of magnitude, depending on the…

Quantum Physics · Physics 2010-03-03 Alessandro Sergi , Francesco Petruccione

In the simulation of intermediate energy heavy ion collisions by using the isospin dependent quantum molecular dynamics, the isospin effect on the process of multifragmentation and dissipation has been studied. It is found that the…

Nuclear Theory · Physics 2009-11-07 Jian-Ye Liu , Yan-Fang Yang , Wei Zuo , Shun-Jin Wang , Qiang Zhao , Wen-Jun Guo , Bo Chen

When energy of colliding nuclei is between 100-600 MeV/nucleon then multifragmentation take place. By studying the fragments (at final stage of reaction) we can seize the idea about initial condition and various other parameter which…

Nuclear Theory · Physics 2011-12-15 Rubina Bansal , Suneel Kumar

Parametrizations of fragmentation functions (FFs) from $e^+$-$e^-$ and p-\=p collisions are combined with a parton spectrum model in a pQCD folding integral to produce minimum-bias {\em fragment distributions}. A model of in-medium FF…

High Energy Physics - Phenomenology · Physics 2009-10-08 Thomas A. Trainor

In this work, we present an efficient framework that combines machine learning potential (MLP) and metadynamics to explore multi-dimensional free energy surfaces for investigating solid-solid phase transition. Based on the spectral…

Materials Science · Physics 2022-11-02 Pedro A. Santos-Florez , Howard Yanxon , Byungkyun Kang , Yansun Yao , Qiang Zhu

Multi-nucleon transfer in $^{86}$Kr+$^{64}$Ni at an incident energy of 25 MeV/nucleon is for the first time investigated with a microscopic dynamics model: improved quantum molecular dynamics (ImQMD) model. The measured isotope…

Nuclear Theory · Physics 2017-02-01 Hong Yao , Ning Wang

Isolated many-body quantum systems quenched far from equilibrium can eventually equilibrate, but it is not yet clear how long they take to do so. To answer this question, we use exact numerical methods and analyze the entire evolution, from…

Disordered Systems and Neural Networks · Physics 2021-08-20 Talía L. M. Lezama , E. Jonathan Torres-Herrera , Francisco Pérez-Bernal , Yevgeny Bar Lev , Lea F. Santos

Quantum nanosystems such as graphene nanoribbons or superconducting nanoparticles are studied via a multiscale approach. Long space-time dynamics is derived using a perturbation expansion in the ratio of the nearest-neighbor distance to a…

Quantum Physics · Physics 2011-03-10 Zeina Shreif , Peter Ortoleva

We study theoretically the quantum optical properties of hybrid molecules composed of an individual quantum dot and a metallic nanoparticle. We calculate the resonance fluorescence of this hybrid system. Its incoherent part, the one arising…

Quantum Physics · Physics 2010-04-12 A. Ridolfo , O. Di Stefano , N. Fina , R. Saija , S. Savasta

Detailed studies of the azimuthal dependence of the mean fragment and flow energies in the Au+Au and Xe+CsI systems are reported as a function of incident energy and centrality. Comparisons between data and model calculations show that the…