Title: Small-x Physics in eA at the LHeC: Understanding the Initial State of URHIC Author:Armesto Néstor Subject:Physics Description:
I discuss the project of an electron-proton/ion collider at CERN using the LHC beams, the Large Hadron Electron Collider. After a brief introduction, I summarise the possibilities for electron-nucleus collisions. I also indicate the status of the project and future steps to be taken.
Is part of:
EPJ Web of conferences, 01 March 2014, Vol.66, p.04019
2100-014X (E-ISSN); 10.1051/epjconf/20146604019 (DOI)
Title: e a collisions at the large hadronelectron collider Author:Armesto, Néstor Subject:Physics; Description:
I show the possibilities for electronion studies offered by the proposed electronhadron collider at CERN, the Large Hadronelectron Collider. I first focus on small- x aspects: inclusive measurements and the determination of parton densities, and diffraction. I end by discussing some possibilities for final state studies.
Is part of:
Journal of Physics G: Nuclear and Particle Physics, 2011, Vol.38(12), p.124127 (4pp)
0954-3899 (ISSN); 1361-6471 (E-ISSN); 10.1088/0954-3899/38/12/124127 (DOI)
Title: Kinematic biases on centrality selection of jet events in pPb collisions at the LHC Author:Armesto, Nestor Contributor:Armesto, Nestor (pacrepositoryorg) Subject:Collaboration ; Collisions ; Large Hadron Collider ; Solenoids ; Jets ; Cooperation ; Nucleons ; Computer Simulation ; Energy Conservation Description:
Centrality selection has been observed to have a large effect on jet observables in pPb collisions at the Large Hadron Collider, stronger than that predicted by the nuclear modification of parton densities. We study to which extent simple considerations of energy-momentum conservation between the hard process and the underlying event affect jets observables in such collisions. We develop a simplistic approach that considers first the production of jets in a pp collision as described by PYTHIA. From each pp collision, the value of the energy of the parton from the proton participating in the hard scattering is extracted. Then, the underlying event is generated simulating a pPb collision through HIJING, but with the energy of the proton decreased according to the value extracted in the previous step, and both collisions are superimposed. This model is able to capture the bulk of the centrality effect for central to semicentral collisions, for the two available sets of data: dijets from the...
Is part of:
arXiv.org, Feb 10, 2015
Heavy-ion collisions at the Large Hadron Collider: A review of the results from Run 1
Armesto, Néstor, Scomparin, Enrico
The European Physical Journal Plus, 2016, Vol.131(3), pp.1-32
[Peer Reviewed Journal]
Title: Diffractive photoproduction of vector mesons at the LHC Author:Armesto, Néstor; Rezaeian, Amir Contributor:Rezaeian, Amir (pacrepositoryorg) Subject:Photoproduction ; Vector Mesons ; Mesons ; Dipoles ; Saturation Description:
We confront saturation-based results for diffractive \(\psi(2s)\) and \(\rho\) production at HERA and \(J/\psi\) photoproduction with all available data including recent ones from HERA, ALICE and LHCb, finding a good agreement. We show that the \(t\)-distribution of differential cross-section of photoproduction of vector mesons offers a unique opportunity to discriminate among saturation and non-saturation models. This is due to emergence of a pronounced dip (or multiple dips) in the \(t\)-distribution of diffractive photoproduction of vector mesons at relatively large, but potentially accessible \(|t|\) that can be traced back to the unitarity features of colour dipole amplitude in the saturation regime. We provide various predictions for exclusive (photo)-production of different vector mesons including the ratio of \(\psi(2s)/J/\psi\) at HERA, the LHC and at future colliders.
Is part of:
arXiv.org, Jul 24, 2014