Glauber Monte-Carlo Study of 200 GeV U+U Collisions at RHIC

Glauber Monte-Carlo Study of 200 GeV U+U Collisions at RHIC
Author: Christopher E. Flores
Publisher:
Total Pages: 122
Release: 2010
Genre: Collisions (Nuclear physics)
ISBN:

Collisions of deformed uranium (238U) nuclei are studied using Glauber Monte-Carlo simulations in an effort to elucidate the effects of the non-symmetric rotations of prolate spheroid nucleus geometry and impact parameter. The nucleon density distribution is given by a three parameter Woods-Saxon density function and a Glauber Model is used in a Monte-Carlo simulation of U+U collisions. The number of participant nucleons and number of nucleon-nucleon collisions is determined and compared to the results found for gold using the same model. Simulations of uranium collisions shows that tip to tip U+U collisions increase energy density by 35% while body to body collisions decrease energy density by 10% compared to central Au+Au collisions. It is also shown that a cut on the top 5% of the charged multiplicity density per unit transverse area results in no significant increase or decrease in collision energy density. Finally, plots of predicted Upsilon production values show expected Upsilon production of collisions at various impact parameters and full overlap orientations.

Monte Carlo Glauber Model

Monte Carlo Glauber Model
Author: Prabhat Bhattarai
Publisher:
Total Pages:
Release: 2015
Genre:
ISBN:

The study of quarks and their interaction through gluons has been active area of research since its discovery. It has been about two decades that Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is dedicated to study interaction between quarks by producing nuclear matter in extremely dense and hot environment. It has been understood that colliding beams of atomic nuclei at a speed close to the speed of light creates the hot and dense environment in which all quarks in the nuclei de-confine to form a short-lived state of matter called Quark Gluon Plasma (QGP). Because of the short lifetime of QGP, the only way to study such matter is through the final state of particles. A significant feature of the final state distribution of particles is an azimuthal anisotropy, which is dominated by the second Fourier component; the amplitude is proportional to parameter v2. One of the major interpretations of this anisotropy is based on the hypothesized thermal equilibrium of the QGP leading to pressure driven collective flow. The other is that quantum interference among many quark and gluon scatterings leads directly to anisotropy in the final state. The present report presents a way to calculate the observed quadrupole correlation amplitude, v2, without assuming collective flow. The study uses a Monte Carlo method to simulate the gold-gold nuclear collision data using experimental results from proton-proton collisions. The quality of simulated results is assured by comparison to theoretical understanding of the phenomenon as well as to the experimental data. This report presents studies of two-particle correlations, whose derivation can be traced back to Pearson's correlation coefficient, in azimuthal angular space of the simulated tracks of the particles produced in the gold-gold of collisions. The correlation result is fitted to extract the v2 and compared to the same quantity from the experimental data. The comparison suggests that a fraction of the v2 in gold-gold collisions can be accounted for by phenomenon not associated with collective flow.

Improved Version of the PHOBOS Glauber Monte Carlo

Improved Version of the PHOBOS Glauber Monte Carlo
Author:
Publisher:
Total Pages: 6
Release: 2015
Genre:
ISBN:

"Glauber" models are used to calculate geometric quantities in the initial state of heavy ion collisions, such as impact parameter, number of participating nucleons and initial eccentricity. Experimental heavy-ion collaborations, in particular at RHIC and LHC, use Glauber Model calculations for various geometric observables for determination of the collision centrality. In this document, we describe the assumptions inherent to the approach, and provide an updated implementation (v2) of the Monte Carlo based Glauber Model calculation, which originally was used by the PHOBOS collaboration. The main improvement w.r.t. the earlier version (v1) (Alver et al. 2008) is the inclusion of Tritium, Helium-3, and Uranium, as well as the treatment of deformed nuclei and Glauber-Gribov fluctuations of the proton in p +A collisions. A users' guide (updated to reflect changes in v2) is provided for running various calculations.

Report on the Oak Ridge Workshop on Monte Carlo Codes for Relativistic Heavy-ion Collisions

Report on the Oak Ridge Workshop on Monte Carlo Codes for Relativistic Heavy-ion Collisions
Author:
Publisher:
Total Pages:
Release: 1988
Genre:
ISBN:

In order to make detailed predictions for the case of purely hadronic matter, several Monte Carlo codes have been developed to describe relativistic nucleus-nucleus collisions. Although these various models build upon models of hadron-hadron interactions and have been fitted to reproduce hadron-hadron collision data, they have rather different pictures of the underlying hadron collision process and of subsequent particle production. Until now, the different Monte Carlo codes have, in general, been compared to different sets of experimental data, according to which results were readily available to the model builder or which Monte Carlo code was readily available to an experimental group. As a result, it has been difficult to draw firm conclusions about whether the observed deviations between experiments and calculations were due to deficiencies in the particular model, experimental discrepancies, or interesting effects beyond a simple superposition of nucleon-nucleon collisions. For this reason, it was decided that it would be productive to have a structured confrontation between the available experimental data and the many models of high-energy nuclear collisions in a manner in which it could be ensured that the computer codes were run correctly and the experimental acceptances were properly taken into account. With this purpose in mind, a Workshop on Monte Carlo Codes for Relativistic Heavy-Ion Collisions was organized at the Joint Institute for Heavy Ion Research at Oak Ridge National Laboratory from September 12--23, 1988. This paper reviews this workshop. 11 refs., 6 figs.

Introduction to Relativistic Heavy Ion Physics

Introduction to Relativistic Heavy Ion Physics
Author: Jerzy Bartke
Publisher: World Scientific
Total Pages: 239
Release: 2009
Genre: Science
ISBN: 9810212313

This book attempts to cover the fascinating field of physics of relativistic heavy ions, mainly from the experimentalist's point of view. After the introductory chapter on quantum chromodynamics, basic properties of atomic nuclei, sources of relativistic nuclei, and typical detector set-ups are described in three subsequent chapters. Experimental facts on collisions of relativistic heavy ions are systematically presented in 15 consecutive chapters, starting from the simplest features like cross sections, multiplicities, and spectra of secondary particles and going to more involved characteristics like correlations, various relatively rare processes, and newly discovered features: collective flow, high pT suppression and jet quenching. Some entirely new topics are included, such as the difference between neutron and proton radii in nuclei, heavy hypernuclei, and electromagnetic effects on secondary particle spectra.Phenomenological approaches and related simple models are discussed in parallel with the presentation of experimental data. Near the end of the book, recent ideas about the new state of matter created in collisions of ultrarelativistic nuclei are discussed. In the final chapter, some predictions are given for nuclear collisions in the Large Hadron Collider (LHC), now in construction at the site of the European Organization for Nuclear Research (CERN), Geneva. Finally, the appendix gives us basic notions of relativistic kinematics, and lists the main international conferences related to this field. A concise reference book on physics of relativistic heavy ions, it shows the present status of this field.

A Short Course on Relativistic Heavy Ion Collisions

A Short Course on Relativistic Heavy Ion Collisions
Author: Asis Kumar Chaudhuri
Publisher: Iop Expanding Physics
Total Pages: 0
Release: 2014-10-03
Genre: Science
ISBN: 9780750310611

Some ideas/concepts in relativistic heavy ion collisions are discussed. To a large extent, the discussions are non-comprehensive and non-rigorous. It is intended for fresh graduate students of Homi Bhabha National Institute, Kolkata Centre, who are intending to pursue career in theoretical /experimental high energy nuclear physics. Comments and criticisms will be appreciated

Multiple Parton Interactions at the LHC

Multiple Parton Interactions at the LHC
Author: Paolo Bartalini
Publisher: World Scientific Publishing
Total Pages: 472
Release: 2018-11-08
Genre: Science
ISBN: 981322777X

Many high-energy collider experiments (including the current Large Hadron Collider at CERN) involve the collision of hadrons. Hadrons are composite particles consisting of partons (quarks and gluons), and this means that in any hadron–hadron collision there will typically be multiple collisions of the constituents — i.e. multiple parton interactions (MPI). Understanding the nature of the MPI is important in terms of searching for new physics in the products of the scatters, and also in its own right to gain a greater understanding of hadron structure. This book aims at providing a pedagogical introduction and a comprehensive review of different research lines linked by an involvement of MPI phenomena. It is written by pioneers as well as young leading scientists, and reviews both experimental findings and theoretical developments, discussing also the remaining open issues.

The Lund Model

The Lund Model
Author: Bo Andersson
Publisher: Cambridge University Press
Total Pages: 485
Release: 2023-07-31
Genre: Science
ISBN: 1009401254