scholarly journals Towards the three-dimensional parton structure of the pion: Integrating transverse momentum data into global QCD analysis

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
N. Y. Cao ◽  
P. C. Barry ◽  
N. Sato ◽  
W. Melnitchouk ◽  
Keyword(s):  
Transverse Momentum ◽  
Three Dimensional ◽  
Qcd Analysis

scholarly journals Event Patterns Extracted from Transverse Momentum and Rapidity Spectra ofZBosons and Quarkonium States Produced in pp and Pb-Pb Collisions at LHC

2016 ◽  
Vol 2016 ◽  
pp. 1-19 ◽  
Author(s):  
Ya-Hui Chen ◽  
Fu-Hu Liu ◽  
Roy A. Lacey
Keyword(s):  
Transverse Momentum ◽  
Hadron Collider ◽  
Center Of Mass ◽  
Three Dimensional ◽  
Erlang Distribution ◽  
Proton Proton ◽  
Center Of Mass Energy ◽  
Two Component ◽  
Scatter Plots ◽  
Parameter Values

Transverse momentum (pT) and rapidity (y) spectra ofZbosons and quarkonium states (some charmoniumcc¯mesons such asJ/ψandψ(2S)and some bottomoniumbb¯mesons such asΥ(1S),Υ(2S), andΥ(3S)) produced in proton-proton (pp) and lead-lead (Pb-Pb) collisions at the large hadron collider (LHC) are uniformly described by a hybrid model of two-component Erlang distribution forpTspectrum and two-component Gaussian distribution foryspectrum. The former distribution results from a multisource thermal model, and the latter one results from the revised Landau hydrodynamic model. The modelling results are in agreement with the experimental data measured in pp collisions at center-of-mass energiess=2.76and 7 TeV and in Pb-Pb collisions at center-of-mass energy per nucleon pairsNN=2.76 TeV. Based on the parameter values extracted frompTandyspectra, the event patterns (particle scatter plots) in two-dimensionalpT-yspace and in three-dimensional velocity space are obtained.

A Numerical Solution for Laminar Entrance Flow in a Square Duct

1973 ◽  
Vol 40 (1) ◽  
pp. 25-30 ◽  
Author(s):  
G. A. Carlson ◽  
R. W. Hornbeck
Keyword(s):  
Transverse Momentum ◽  
Finite Difference ◽  
Viscous Fluid ◽  
Experimental Work ◽  
Three Dimensional ◽  
Square Duct ◽  
Inlet Velocity ◽  
Pressure Distributions ◽  
Insight Into ◽  
Entrance Flow

The laminar entrance flow of an incompressible viscous fluid in a square duct is analyzed numerically. Two approximate mathematical models are considered, with the more exact model including the transverse momentum equations. Finite-difference representations are developed for the equations of both models, and solutions are obtained assuming a uniform inlet velocity distribution. Results are presented for the velocity and pressure distributions in the entrance region, and comparisons made with previous analytical and experimental work. The results provide new insight into the true three-dimensional character of the flow and are more accurate than previously available solutions.

scholarly journals On Productions of Net-Baryons in Central Au-Au Collisions at RHIC Energies

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Ya-Hui Chen ◽  
Guo-Xing Zhang ◽  
Fu-Hu Liu
Keyword(s):  
Transverse Momentum ◽  
Particle Production ◽  
Three Dimensional ◽  
Transverse Momentum Distribution ◽  
Contribution Ratio ◽  
200 Gev ◽  
Rapidity Distributions ◽  
Scatter Plots ◽  
Two Parameters ◽  
Different Characteristics

The transverse momentum and rapidity distributions of net-baryons (baryons minus antibaryons) produced in central gold-gold (Au-Au) collisions at 62.4 and 200 GeV are analyzed in the framework of a multisource thermal model. Each source in the model is described by the Tsallis statistics to extract the effective temperature and entropy index from the transverse momentum distribution. The two parameters are used as input to describe the rapidity distribution and to extract the rapidity shift and contribution ratio. Then, the four types of parameters are used to structure some scatter plots of the considered particles in some three-dimensional (3D) spaces at the stage of kinetic freeze-out, which are expected to show different characteristics for different particles and processes. The related methodology can be used in the analyses of particle production and event holography, which are useful for us to better understand the interacting mechanisms.

scholarly journals TRANSVERSE MOMENTUM DISTRIBUTION WITH RADIAL FLOW IN RELATIVISTIC DIFFUSION MODEL

2007 ◽  
Vol 16 (01) ◽  
pp. 133-147 ◽  
Author(s):  
N. SUZUKI ◽  
M. BIYAJIMA
Keyword(s):  
Distribution Function ◽  
Transverse Momentum ◽  
Radial Flow ◽  
Three Dimensional ◽  
Boltzmann Distribution ◽  
Heavy Ion ◽  
Large Transverse Momentum ◽  
Relativistic Heavy Ion Collider ◽  
Momentum Distributions ◽  
Relativistic Diffusion Model

Large transverse momentum distributions of identified particles observed at the Relativistic Heavy Ion Collider (RHIC) are analyzed by a relativistic stochastic model in the three dimensional (non-Euclidean) rapidity space. A distribution function obtained from the model is Gaussian-like in radial rapidity. It can well describe observed transverse momentum pT distributions. Estimation of radial flow is made from the analysis of pT distributions for [Formula: see text] in Au + Au Collisions. Temperatures are estimated from observed large pT distributions under the assumption that the distribution function approaches to the Maxwell–Boltzmann distribution in the lower momentum limit. The power-law behavior of large pT distribution is also derived from the model.

scholarly journals TMDlib2 and TMDplotter: a platform for 3D hadron structure studies

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
N. A. Abdulov ◽  
A. Bacchetta ◽  
S. Baranov ◽  
A. Bermudez Martinez ◽  
V. Bertone ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Three Dimensional ◽  
Easy Access ◽  
Hadron Structure ◽  
Web Based ◽  
Parton Distributions ◽  
Transverse Momentum Dependent

AbstractA common library, TMDlib2, for Transverse-Momentum-Dependent distributions (TMDs) and unintegrated parton distributions (uPDFs) is described, which allows for easy access of commonly used TMDs and uPDFs, providing a three-dimensional (3D) picture of the partonic structure of hadrons. The tool TMDplotter allows for web-based plotting of distributions implemented in TMDlib2, together with collinear pdfs as available in LHAPDF.

scholarly journals A QCD Analysis of Average Transverse Momentum in Jet Fragmentation

1981 ◽  
Vol 66 (2) ◽  
pp. 588-600
Author(s):  
K. Iguchi ◽  
H. Nakkagawa ◽  
A. Niegawa
Keyword(s):  
Transverse Momentum ◽  
Average Transverse Momentum ◽  
Jet Fragmentation ◽  
Qcd Analysis

QCD analysis of jets recoiling against large transverse momentum muon pairs

1978 ◽  
Vol 144 (2-3) ◽  
pp. 422-444 ◽  
Author(s):  
K. Kajantie ◽  
J. Lindfors ◽  
Risto Raitio
Keyword(s):  
Transverse Momentum ◽  
Large Transverse Momentum ◽  
Muon Pairs ◽  
Qcd Analysis

scholarly journals Three Dimensional Imaging of the Nucleon — TMD (Theory and Phenomenology)

2016 ◽  
Vol 40 ◽  
pp. 1660008 ◽  
Author(s):  
Zuo-Tang Liang
Keyword(s):  
Transverse Momentum ◽  
Parton Distribution ◽  
Three Dimensional ◽  
Theoretical Framework ◽  
Nucleon Scattering ◽  
Three Dimensional Imaging ◽  
Transverse Momentum Dependent ◽  
One Dimensional ◽  
Fragmentation Functions ◽  
The One

This is intend to provide an overview of the theory and phenomenology parts of the TMD (Transverse Momentum Dependent parton distribution and fragmentation functions) studies. By comparing with the theoretical framework that we have for the inclusive deep inelastic lepton-nucleon scattering and the one-dimensional imaging of the nucleon, I try to outline what we need to do in order to construct a comprehensive theoretical framework for semi-inclusive reactions and the three dimensional imaging of the nucleon. After that, I try to give an overview of what we have already achieved and make an outlook for the future.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Sign in / Sign up

Export Citation Format

Share Document