Charged-particle Distributions in Pp Interactions at {u221A}s

Charged-particle Distributions in Pp Interactions at {u221A}s
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Release: 2016
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This study presents measurements of distributions of charged particles which are produced in proton–proton collisions at a centre-of-mass energy of √s=8TeV and recorded by the ATLAS detector at the LHC. A special dataset recorded in 2012 with a small number of interactions per beam crossing (below 0.004) and corresponding to an integrated luminosity of 160 ?b-1 was used. A minimum-bias trigger was utilised to select a data sample of more than 9 million collision events. The multiplicity, pseudorapidity, and transverse momentum distributions of charged particles are shown in different regions of kinematics and charged-particle multiplicity, including measurements of final states at high multiplicity. Finally, the results are corrected for detector effects and are compared to the predictions of various Monte Carlo event generator models which simulate the full hadronic final state.

A Description of Pseudorapidity Distributions in P-p Collisions at Center-of-mass Energy from 23.6 to 900 GeV*Supported by Transformation Project of Science and Technology of Shanghai Baoshan District (CXY-2012-25), Shanghai Leading Academic Discipline Project (XTKX 2012), National Training Project (14XPM03), and the Hujiang Foundation of China (B14004).

A Description of Pseudorapidity Distributions in P-p Collisions at Center-of-mass Energy from 23.6 to 900 GeV*Supported by Transformation Project of Science and Technology of Shanghai Baoshan District (CXY-2012-25), Shanghai Leading Academic Discipline Project (XTKX 2012), National Training Project (14XPM03), and the Hujiang Foundation of China (B14004).
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Release: 2015
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Abstract: In the context of the combined model of evolution-dominated hydrodynamics + leading particles, we discuss the pseudorapidity distributions of charged particles produced in p-p collisions. A comparison is made between the theoretical predictions and experimental measurements. The combined model works well in p-p collisions in the whole available energy region from √ s = 23.6 to 900 GeV.

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

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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.

Ultrarelativistic Heavy-Ion Collisions

Ultrarelativistic Heavy-Ion Collisions
Author: Ramona Vogt
Publisher: Elsevier
Total Pages: 489
Release: 2007-06-04
Genre: Science
ISBN: 0080525369

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This book is designed for advanced undergraduate and graduate students in high energy heavy-ion physics. It is relevant for students who will work on topics being explored at RHIC and the LHC. In the first part, the basic principles of these studies are covered including kinematics, cross sections (including the quark model and parton distribution functions), the geometry of nuclear collisions, thermodynamics, hydrodynamics and relevant aspects of lattice gauge theory at finite temperature. The second part covers some more specific probes of heavy-ion collisions at these energies: high mass thermal dileptons, quarkonium and hadronization. The second part also serves as extended examples of concepts learned in the previous part. Both parts contain examples in the text as well as exercises at the end of each chapter. - Designed for students and newcomers to the field- Focuses on hard probes and QCD- Covers all aspects of high energy heavy-ion physics- Includes worked example problems and exercises