scholarly journals The broad away side of azimuthal correlations: 3 vs 2 final state particles in high energy nuclear collisions

2011 ◽  
Author(s):  
Alejandro Ayala ◽  
Jamal Jalilian-Marian ◽  
Javier Magnin ◽  
Antonio Ortíz ◽  
Guy Paić ◽  
...  
Keyword(s):  
High Energy ◽  
Final State ◽  
Azimuthal Correlations ◽  
Nuclear Collisions

scholarly journals Final state hadronic rescattering with UrQMD

2018 ◽  
Vol 171 ◽  
pp. 05003 ◽  
Author(s):  
J. Steinheimer ◽  
V. Vovchenko ◽  
J. Aichelin ◽  
M. Bleicher ◽  
H. Stöcker
Keyword(s):  
Momentum Distribution ◽  
Chemical Equilibrium ◽  
Transport Model ◽  
Local Equilibrium ◽  
High Energy ◽  
Final State ◽  
Nuclear Collisions ◽  
Unstable Particles ◽  
Realistic Description ◽  
Do So

In this talk we discuss the effects of the hadronic rescattering on final state observables in high energy nuclear collisions. We do so by employing the UrQMD transport model for a realistic description of the hadronic decoupling process. The rescattering of hadrons modifies every hadronic bulk observable. For example apparent multiplicity of resonances is suppressed as compared to a chemical equilibrium freeze-out model. Stable and unstable particles change their momentum distribution by more than 30% through rescattering. The hadronic rescattering also leads to a substantial decorrelation of the conserved charge distributions. These findings show that it is all but trivial to conclude from the final state observables on the properties of the system at an earlier time where it may have been in or close to local equilibrium.

scholarly journals Monte Carlo approach for hadron azimuthal correlations in high energy proton and nuclear collisions

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
Alejandro Ayala ◽  
Isabel Dominguez ◽  
Jamal Jalilian-Marian ◽  
J. Magnin ◽  
Maria Elena Tejeda-Yeomans
Keyword(s):  
Monte Carlo ◽  
High Energy ◽  
High Energy Proton ◽  
Monte Carlo Approach ◽  
Azimuthal Correlations ◽  
Nuclear Collisions ◽  
Energy Proton

scholarly journals Hunting BFKL in semi-hard reactions at the LHC

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
Francesco Giovanni Celiberto
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Final State ◽  
Logarithmic Approximation ◽  
Azimuthal Correlations ◽  
Bfkl Approach ◽  
Fixed Order ◽  
Numerical Tool ◽  
Scale Optimization ◽  
Sensitive Observables

AbstractThe agreement between calculations inspired by the resummation of energy logarithms, known as BFKL approach, and experimental data in the semi-hard sector of QCD has become manifest after a wealthy series of phenomenological analyses. However, the contingency that the same data could be concurrently portrayed at the hand of fixed-order, DGLAP-based calculations, has been pointed out recently, but not yet punctually addressed. Taking advantage of the richness of configurations gained by combining the acceptances of CMS and CASTOR detectors, we give results in the full next-to-leading logarithmic approximation of cross sections, azimuthal correlations and azimuthal distributions for three distinct semi-hard processes, each of them featuring a peculiar final-state exclusiveness. Then, making use of disjoint intervals for the transverse momenta of the emitted objects, i.e. $$\kappa $$ κ -windows, we clearly highlight how high-energy resummed and fixed-order driven predictions for semi-hard sensitive observables can be decisively discriminated in the kinematic ranges typical of current and forthcoming analyses at the LHC. The scale-optimization issue is also introduced and explored, while the uncertainty coming from the use of different PDF and FF set is deservedly handled. Finally, a brief overview of , a numerical tool recently developed, suited for the computation of inclusive semi-hard reactions is provided.

scholarly journals Azimuthal correlations in the target fragmentation region of high energy nuclear collisions

1996 ◽  
Vol 381 (1-3) ◽  
pp. 29-34 ◽  
Author(s):  
T.C. Awes ◽  
D. Bock ◽  
R. Bock ◽  
G. Clewing ◽  
S. Garpman ◽  
...  
Keyword(s):  
High Energy ◽  
Fragmentation Region ◽  
Azimuthal Correlations ◽  
Nuclear Collisions ◽  
Target Fragmentation
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