scholarly journals Nuclear modification factor for charged pions and protons at forward rapidity in central Au+Au collisions at 200 GeV

2007 ◽  
Vol 650 (4) ◽  
pp. 219-223 ◽  
Author(s):  
I. Arsene ◽  
I.G. Bearden ◽  
D. Beavis ◽  
C. Besliu ◽  
B. Budick ◽  
...  
Keyword(s):  
Forward Rapidity ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Charged Pions ◽  
200 Gev ◽  
Modification Factor

scholarly journals Quarkonium production in pp and p-A collisions with ALICE at the LHC

2018 ◽  
Vol 171 ◽  
pp. 19002
Author(s):  
Astrid Morreale
Keyword(s):  
Theoretical Calculations ◽  
Charm Quark ◽  
Forward Rapidity ◽  
Charmonium Production ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Quarkonium Production ◽  
Modification Factor ◽  
8 Tev ◽  
Using Data

Quarkonia are mesons formed of either a charm and anti-charm quark pair (J/ψ, ψ(2S)) or a beauty and anti-beauty quark pair (ϒ(1S), (2S) and (3S)). We report on forward rapidity (2:5 < y < 4) J/ψ and ψ(2S) production measured in pp collisions at √s = 13 TeV, using data collected at the LHC in 2015. The results will be compared with similar measurements performed at √s = 2.76, 5.02, 7 and 8 TeV. They will be further compared to NRQCD and FONLL calculations, which describe prompt and non-prompt charmonium production respectively. Results of the J/ψ nuclear modification factor as a function of collision centrality in p–Pb collisions at [see formula in PDF] = 8.16 TeV, at forward and backward rapidities, will also be presented. These measurements will be compared with Run-1 (2009 – 2013) results as well as theoretical calculations and will be interpreted in terms of cold nuclear matter effects.

scholarly journals Measurements of J/ψ Production and Polarization in p+p and p+Au Collisions at s NN = 200 GeV with the STAR Experiment

2018 ◽  
Vol 46 ◽  
pp. 1860015
Author(s):  
Zhen Liu
Keyword(s):  
Decay Channel ◽  
Muon Decay ◽  
Model Calculations ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Nuclear Absorption ◽  
Text Production ◽  
200 Gev ◽  
Modification Factor ◽  
Star Experiment

We present the measurements of [Formula: see text] production at mid-rapidity via the di-muon decay channel in p+p and p+Au collisions at [Formula: see text] = 200 GeV by the STAR experiment at RHIC. In p+p collisions, the measured inclusive [Formula: see text] cross section can be qualitatively described by model calculations. The [Formula: see text] polarization parameters, [Formula: see text], [Formula: see text] as well as the frame-invariant quantity [Formula: see text], are presented as a function of transverse momentum in both the helicity and Collins-Soper frames. No significant polarization is observed. In addition, the nuclear modification factor for inclusive J/[Formula: see text] in p+Au collisions is similar to that measured in d+Au collisions and favors an additional nuclear absorption effect on top of the nuclear PDF effect.

scholarly journals Impact of scale, nuclear PDF and temperature variations on the interpretation of medium-modified jet production data from the LHC

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
A. Andronic ◽  
J. Honermann ◽  
M. Klasen ◽  
C. Klein-Bösing ◽  
J. Salomon
Keyword(s):  
Distribution Functions ◽  
Production Data ◽  
Crossover Temperature ◽  
Parton Distribution Functions ◽  
Temperature Variations ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Modification Factor ◽  
The Impact ◽  
Jet Structure

Abstract In this paper we present a study of in-medium jet modifications performed with JEWEL and PYTHIA 6.4, focusing on the uncertainties related to variations of the perturbative scales and nuclear parton distribution functions (PDFs) and on the impact of the initial and crossover temperature variations of the medium. The simulations are compared to LHC data for the jet spectrum and the nuclear modification factor. We assess the interplay between the choice of nuclear PDFs and different medium parameters and study the impact of nuclear PDFs and the medium on the jet structure via the Lund plane.

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