Publications (29)
The QCD/SM Working Group: Summary Report
S. Alekhin, C. Balazs, R. Ball +57
This Report documents the results obtained by the Working Group on Quantum ChromoDynamics and the Standard Model for the Workshop ``Physics at TeV Colliders'', Les Houches, France,…
Centrality dependence of proton and antiproton spectra in Pb+Pb collisions at 40A GeV and 158A GeV measured at the CERN SPS
T. Anticic, B. Baatar, D. Barna +68
The yields of (anti-)protons were measured by the NA49 Collaboration in centrality selected Pb+Pb collisions at 40A GeV and 158A GeV. Particle identification was obtained in the la…
Measurement of event-by-event transverse momentum and multiplicity fluctuations using strongly intensive measures and in nucleus-nucleus collisions at the CERN Super Proton Synchrotron
NA49 Collaboration, T. Anticic, B. Baatar +64
Results from the NA49 experiment at the CERN SPS are presented on event-by-event transverse momentum and multiplicity fluctuations of charged particles, produced at forward rapidit…
NA49 Energy Scan Results for Central Lead-Lead Collisions at the CERN SPS
M. Botje
The energy dependence of hadron production in central Pb-Pb collisions at SPS energies is presented and compared with data at lower and higher energies and with results from p-p in…
Error propagation in QCD fits
M. Botje
The parton momentum density distributions of the proton were obtained from a NLO QCD analysis of HERA and fixed target structure function data. The resulting parton distribution se…
Proton-Nucleus Collisions at the LHC: Scientific Opportunities and Requirements
C. A. Salgado, J. Alvarez-Muniz, F. Arleo +27
Proton-nucleus (p+A) collisions have long been recognized as a crucial component of the physics programme with nuclear beams at high energies, in particular for their reference rol…
Phase-space dependence of particle-ratio fluctuations in Pb+Pb collisions from 20A to 158A GeV beam energy
T. Anticic, B. Baatar, D. Barna +65
A novel approach, the identity method, was used for particle identification and the study of fluctuations of particle yield ratios in Pb+Pb collisions at the CERN Super Proton Sync…
xFitter 2.0.0: An Open Source QCD Fit Framework
V. Bertone, M. Botje, D. Britzger +10
xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in…
Strange baryon resonance production in GeV and collisions
The STAR collaboration, B. I. Abelev, M. M. Aggarwal +375
We report the measurements of and production in and collisions at GeV from the STAR collaboration. The yields and the $p_{…
Future Precision Measurements , and at HERA
M. Botje, M. Klein, C. Pascaud
The results are presented of a study of the accuracy one may achieve at HERA in measuring the strong coupling constant and the gluon distribution using future…
HERAFitter, Open Source QCD Fit Project
S. Alekhin, O. Behnke, P. Belov +50
HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analy…
Erratum for the time-like evolution in QCDNUM
M. Botje
A recent comparison of the evolution programs QCDNUM and APFEL showed a discrepancy in the time-like evolution of the singlet fragmentation function at NLO. It was found that the s…
Energy dependence of kaon-to-proton ratio fluctuations in central Pb+Pb collisions from = 6.3 to 17.3 GeV
T. Anticic, B. Baatar, D. Barna +70
Kaons and protons carry large parts of two conserved quantities, strangeness and baryon number. It is argued that their correlation and thus also fluctuations are sensitive to cond…
A QCD analysis of HERA and fixed target structure function data
M. Botje
The parton momentum densities in the proton are obtained from a NLO QCD analysis of structure functions measured by HERA and fixed target experiments. The uncertainties in these pa…
Inclusive J/psi production in pp collisions at sqrt(s) = 2.76 TeV
ALICE Collaboration, B. Abelev, J. Adam +966
The ALICE Collaboration has measured inclusive J/psi production in pp collisions at a center of mass energy sqrt(s)=2.76 TeV at the LHC. The results presented in this Letter refer…
The Structure Function Ratios F2(Li)/F2(D) and F2(C)/F2(D) at small x
THE NEW MUON COLLABORATION, M. Arneodo, A. Arvidson +71
We present the structure function ratios F2(Li)/F2(D) and F2(C)/F2(D) measured in deep inelastic muon-nucleus scattering at a nominal incident muon energy of 200 GeV. The kinematic…
Critical fluctuations of the proton density in A+A collisions at GeV
T. Anticic, B. Baatar, D. Barna +71
We look for fluctuations expected for the QCD critical point using an intermittency analysis in the transverse momentum phase space of protons produced around midrapidity in the 12…
Event-by-event transverse momentum fluctuations in nuclear collisions at CERN SPS
K. Grebieszkow, C. Alt, T. Anticic +98
The latest NA49 results on event-by-event transverse momentum fluctuations are presented for central Pb+Pb interactions over the whole SPS energy range (20A - 158A GeV). Two differ…
xFitter: An Open Source QCD Analysis Framework. A resource and reference document for the Snowmass study
The xFitter Developers' Team, :, H. Abdolmaleki +21
We provide an overview of the xFitter open-source software package, review the general capabilities of the program, and highlight applications relevant to the Snowmass study. An up…
Proton -- Lambda Correlations in Central Pb+Pb Collisions at sqrt(s_{NN}) = 17.3 GeV
T. Anticic, B. Baatar, D. Barna +69
The momentum correlation between protons and lambda particles emitted from central Pb+Pb collisions at sqrt(s_{NN}) = 17.3 GeV was studied by the NA49 experiment at the CERN SPS. A…
QCDNUM: Fast QCD Evolution and Convolution
M. Botje
The QCDNUM program numerically solves the evolution equations for parton densities and fragmentation functions in perturbative QCD. Un-polarised parton densities can be evolved up…
Hard probes in heavy ion collisions at the LHC: PDFs, shadowing and collisions
A. Accardi, N. Armesto, M. Botje +20
This manuscript is the outcome of the subgroup ``PDFs, shadowing and collisions'' from the CERN workshop ``Hard Probes in Heavy Ion Collisions at the LHC''. In addition to the…
System-size and centrality dependence of charged kaon and pion production in nucleus-nucleus collisions at 40A GeV and158A GeV beam energy
NA49 Collaboration, T. Anticic, B. Baatar +74
Measurements of charged pion and kaon production are presented in centrality selected Pb+Pb collisions at 40A GeV and 158A GeV beam energy as well as in semi-central C+C and Si+Si…
A Detailed Comparison of NLO QCD Evolution Codes
J. Blümlein, M. Botje, C. Pascaud +4
Seven next-to-leading order QCD evolution programs are compared. The deviations of the results due to different theoretical prescriptions for truncating the perturbative series are…
Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
C. Alt, T. Anticic, B. Baatar +99
Phi meson production is studied by the NA49 Collaboration in central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV beam energy. The data are compared with measurements at low…
A QCD analysis of HERA and fixed target structure function data
M. Botje
The parton momentum density distributions in the proton are determined from a next-to-leading order QCD analysis of structure functions measured at HERA and by fixed target experim…
Error Estimates on Parton Density Distributions
M. Botje
Error estimates on parton density distributions are presently based on the traditional method of least squares minimisation and linear error propagation in global QCD fits. We revi…
Production of deuterium, tritium, and He in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV at the CERN SPS
NA49 Collaboration, T. Anticic, B. Baatar +63
Production of , , and He nuclei in central Pb+Pb interactions was studied at five collision energies ( 6.3, 7.6, 8.8, 12.3, and 17.3 GeV) with the NA49 de…
Beam-Energy and System-Size Dependence of Dynamical Net Charge Fluctuations
B. I. Abelev, M. M. Aggarwal, Z. Ahammed +360
We present measurements of net charge fluctuations in collisions at 19.6, 62.4, 130, and 200 GeV, collisions at 62.4, 200…