scholarly journals Toward an effective theory of quarkonium production nuclear matter

2019 ◽  
Author(s):  
Ivan Vitev
Keyword(s):  
Nuclear Matter ◽  
Effective Theory ◽  
Quarkonium Production

AN EFFECTIVE THEORY FOR NUCLEAR MATTER WITH GENUINE MANY-BODY FORCES

2012 ◽  
Vol 18 ◽  
pp. 182-190 ◽  
Author(s):  
CÉSAR A. Z. VASCONCELLOS ◽  
JORGE HORVATH ◽  
DIMITER HADJIMICHEF ◽  
ROSANA O. GOMES
Keyword(s):  
Nuclear Matter ◽  
Dense Matter ◽  
New Physics ◽  
Theoretical Research ◽  
Effective Theory ◽  
Many Body ◽  
Conceptual Issue ◽  
Body Forces ◽  
Nuclear Systems ◽  
Space Dynamics

Nuclear science has developed many excellent descriptions that embody various properties of the nucleus, and nuclear matter at low, medium and high densities. However, a full microscopic understanding of nuclear systems is still lacking. The aim of our theoretical research group is to shed some light on such challenges and particularly on open questions facing the high density nuclear many-body problem. Here we focus our attention on the conceptual issue of naturalness and its role in shaping the baryon-meson phase space dynamics in the description of the equation of state (EoS) of nuclear matter. In particular, in order to stimulate possible new directions of research, we discuss relevant aspects of a recently developed relativistic effective theory for nuclear matter with natural parametric couplings and genuine many-body forces. Among other topics we discuss in this work the connection of this theory with other known effective QHD models of the literature and its potentiality in describing a new physics for dense matter.

New developments for a chiral effective theory of nuclear matter

2011 ◽  
Author(s):  
J. A. Oller ◽  
A. Lacour ◽  
U.-G. Meißner
Keyword(s):  
Nuclear Matter ◽  
Effective Theory ◽  
New Developments

NÄIVE DIMENSIONAL ANALYSIS IN AN EFFECTIVE FIELD THEORY FOR NEUTRON STARS

2004 ◽  
Vol 13 (07) ◽  
pp. 1223-1228
Author(s):  
CLÁUDIO M. MAEKAWA ◽  
MOISÉS RAZEIRA ◽  
EDUARDO F. LÜTZ ◽  
CÉSAR A. Z. VASCONCELLOS ◽  
MANFRED DILLIG
Keyword(s):  
Neutron Stars ◽  
Nuclear Matter ◽  
Dimensional Analysis ◽  
Effective Field ◽  
Coupling Constants ◽  
Hadronic Matter ◽  
Lagrangian Model ◽  
Effective Theory ◽  
Model Parameters ◽  
Naive Dimensional Analysis

In the investigation of the role of naturalness in effective theory, we focus on dense hadronic matter in a generalized relativistic multi-baryon Lagrangian density mean field approach which contains nonlinear self-couplings of the σ and δ meson fields interacting with the fundamental baryon octet and with the ω and ϱ meson fields and compare its predictions with estimates obtained within a phenomenological naive dimensional analysis based on the naturalness of the coupling constants of the Lagrangian model; our investigation is limited however to the scalar sector of the theory. Upon adjusting the model parameters to describe bulk static properties of ordinary nuclear matter, we show that our approach represents a natural modelling of nuclear matter under the extreme conditions of density as found in the interior of neutron stars.

scholarly journals Quarkonium Suppression from Coherent Energy Loss in Fixed-Target Experiments Using LHC Beams

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
François Arleo ◽  
Stéphane Peigné
Keyword(s):  
Energy Loss ◽  
Nuclear Matter ◽  
Center Of Mass ◽  
High Energy ◽  
Fixed Target ◽  
Cold Nuclear Matter ◽  
Fixed Target Experiments ◽  
Quarkonium Production ◽  
Nuclear Modification Factors ◽  
Target Experiment

Quarkonium production in proton-nucleus collisions is a powerful tool to disentangle cold nuclear matter effects. A model based on coherent energy loss is able to explain the available quarkonium suppression data in a broad range of rapidities, from fixed-target to collider energies, suggesting coherent energy loss in cold nuclear matter to be the dominant effect in quarkonium suppression in p-A collisions. This could be further tested in a high-energy fixed-target experiment using a proton or nucleus beam. The nuclear modification factors ofJ/ψandΥas a function of rapidity are computed in p-A collisions ats=114.6 GeV, and in p-Pb and Pb-Pb collisions ats=72 GeV. These center-of-mass energies correspond to the collision on fixed-target nuclei of 7 TeV protons and 2.76 TeV (per nucleon) lead nuclei available at the LHC.

Quarkonia in high energy nuclear collisions

2015 ◽  
Vol 24 (11) ◽  
pp. 1530015 ◽  
Author(s):  
Yunpeng Liu ◽  
Kai Zhou ◽  
Pengfei Zhuang
Keyword(s):  
Experimental Data ◽  
Nuclear Matter ◽  
Heavy Ion ◽  
High Energy ◽  
Nuclear Collisions ◽  
Matter Effects ◽  
Ion Collisions ◽  
Quarkonium Production ◽  
High Energy Collisions ◽  
Transport Approach

We first review the cold and hot nuclear matter effects on quarkonium production in high energy collisions, then discuss three kinds of models to describe the quarkonium suppression and regeneration: the sequential dissociation, the statistical production and the transport approach, and finally make comparisons between the models and the experimental data from heavy ion collisions at SPS, RHIC and LHC energies.

scholarly journals Quarkonium Production Measurements with the ALICE Detector at the LHC

2019 ◽  
Vol 64 (7) ◽  
pp. 566
Author(s):  
F. Fionda
Keyword(s):  
Nuclear Matter ◽  
Decay Channel ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Pp Collisions ◽  
Cold Nuclear Matter ◽  
Proton Proton ◽  
Matter Effects ◽  
Ion Collisions ◽  
Quarkonium Production

In (ultra-)relativistic heavy-ion collisions, the strongly interactingmatter is predicted to undergo a phase transition into a plasma of deconfinedquarks and gluons (QGP) and quarkonia probe different aspects of this medium.However, the medium modification of quarkonium production includes also the contribution of cold nuclear matter effects (CNM), such as shadowing or nuclear break-up in addition to QGP effects. Proton--nucleus collisions, where no QGP is expected, are used to measure cold nuclear matter effects on quarkonium production. Vacuum production of quarkonia is modelled in proton--proton (pp) collisions, which are used as reference for both heavy-ion and proton--nucleus collisions. Besides serving as reference, results in pp collisions represent a benchmark test of QCD based models in both perturbative and non-perturbative regimes. The ALICE detector has unique capabilities at the LHC for measuring quarkonia down to zero transverse momentum. Measurements are carried out at both central and forward rapidity, in the dielectron and dimuon decay channel, respectively. In this contribution the latest quarkonium measurements for various energies and colliding systems, performed by the ALICE Collaboration during the LHC Run-2 period, will be discussed.

TEMPERATURE DEPENDENCE OF THE EFFECTIVE INTERACTION IN NUCLEAR MATTER

1987 ◽  
Vol 48 (C2) ◽  
pp. C2-301-C2-304
Author(s):  
M. BALDO ◽  
G. GIANSIRACUSA ◽  
U. LOMBARDO
Keyword(s):  
Nuclear Matter ◽  
Temperature Dependence ◽  
Effective Interaction
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