Conveners
Parallel Heavy flavour: 1
- William Alexander Horowitz (University of Cape Town (ZA))
Parallel Heavy flavour: 2
- Steffen A. Bass (Duke University)
Parallel Heavy flavour: 3
- Zi-Wei Lin (East Carolina University, Central China Normal University)
Parallel Heavy flavour: 4
- Joerg Aichelin (Subatech)
Description
Parallel session heavy flavour
Heavy quarks have been considered valuable probes of the quark-gluon plasma (QGP). It has been found that heavy quarks propagating through a hot and dense QGP lose energy and develop flow. The interacting strength between the heavy quarks and medium ($\hat{q}/D_s$), although not directly measurable, can be estimated by comparison of model calculations with experimental observables. Currently,...
We present a new derivation of the heavy quark diffusion coefficient in a strongly-coupled plasma using the AdS/CFT correspondence. Our main result is that, unlike some previous calculations, our diffusion coefficient does not increase with heavy quark velocity: we find that the effect of momentum fluctuations smoothly interpolates between light and heavy flavors. Taking our diffusion...
The multiplicity dependence of heavy flavour production in pp-collisions at LHC energies is studied in the framework of the multi-pomeron exchange model [1-3].
The model is based on the introducing the string collectivity effects in pp collisions, which modifies the bulk multiplicity and transverse momenta, leading to non-trivial pt-n correlation. The string collectivity strength parameter is...
Heavy-flavor observables are excellent probes of the properties of the in-medium interactions, the medium properties and the degrees of freedom of the quark-gluon plasma created in heavy-ion collisions. Progressing toward a quantitative description, we describe, in EPOSHQ, the dynamics of heavy quark coupled systematically to the EPOS3 model: heavy-quarks are produced from the EPOS3 flux tube...
The energy loss of jets in heavy-ion collisions is expected to depend on the mass and flavor of the initiating parton. Thus, measurements of jet quenching with identified partons place powerful constraints on the thermodynamic and transport properties of the hot and dense medium. Furthermore, recent results that constrain the jet production mechanism will shed additional light on the...
Heavy flavor quarks, owing to their large masses, are predominantly produced through initial hard scatterings in heavy-ion collisions and thus are ideal probes to study the properties of the strongly coupled Quark Gluon Plasma (sQGP) also produced in these collisions. For example, study of the heavy flavor anisotropic flow can help understand the nature of the interactions between heavy quarks...
Open heavy-flavour mesons are a unique tool to study and characterize the properties of the Quark-Gluon Plasma (QGP), formed in heavy-ion collisions at high energy. Given their large masses, heavy quarks are produced in the initial stages of the heavy-ion collisions, and therefore they experience the whole system evolution, loosing energy interacting with the medium constituents. Thus, the...
Heavy-flavour (charm and beauty) production provides relevant information to understand the strongly interacting medium, Quark-Gluon-Plasma (QGP), formed in heavy-ion collisions at ultra-relativistic energies. Heavy quarks are produced primarily in the initial hard partonic interactions, and they propagate through the QGP. A strong suppression of heavy-flavour hadron production has been...
Charmonium states, such as the J/$\psi$ and $\psi$(2S) mesons, are excellent probes of the deconfined state of matter, the Quark-Gluon Plasma (QGP). The understanding of charmonia production in PbPb collisions requires the inclusion of many phenomena, such as dissociation in the QGP and statistical recombination, on top of cold nuclear matter effects (modifications of nPDFs, initial-state...
The study of the nuclear modification factor and the forward/backward
asymmetry in p-Pb collisions at $\sqrt(s_{NN})$=5 TeV is extended to
the $\Lambda_c$ baryon, providing the first measurement of charmed
baryon production in pA collisions. The result is compared to the
analogous measurement on charmed mesons, providing an insight on the
production mechanism of charmed hadrons.
Dielectrons produced in ultra-relativistic heavy-ion collisions at the LHC provide a unique probe of the whole system evolution as they are unperturbed by final-state interactions. The dielectron continuum is extremely rich in physics sources: on top of ordinary Dalitz and resonance decays of pseudoscalar and vector mesons, thermal black-body radiation is of particular interest as it carries...
Charm production in proton-proton collisions can be described by perturbative QCD calculations down to low transverse momentum ($p_\mathrm{T} \sim 0$), due to the large mass of the charm quark ($m_c >> \Lambda_{QCD}$). The measurement of charm production is thus important to constrain theoretical predictions. In p-Pb collisions, the study of charm production can help disentangle cold nuclear...
The ultra-relativistic heavy-ion collisions at the Large Hadron Collider provide an unique opportunity to study the properties of matter at extreme energy densities where a phase transition of the hadronic matter to a deconfined medium of quarks and gluons, the Quark-Gluon Plasma (QGP) is predicted. Considerable theoretical and experimental efforts have been invested in the last 30 years to...
We describe the propagation of heavy quarks in the quark-gluon plasma (QGP) by means of
a Boltzmann transport approach. We take into account the non-perturbative interaction between
heavy quarks and light quarks by means of a quasi particle approach in which light partons are
dressed with thermal masses. Such a model is able to catch the main features of non-perturbative
interaction as the...
Measurements of quarkonium production have played an important role in understanding the properties of the Quark-Gluon Plasma (QGP) formed in relativistic heavy-ion collisions. Quarkonium suppression in the medium due to the color screening effect has been proposed as a direct signature of the QGP formation. However, other effects, such as cold nuclear matter (CNM) effects and regeneration,...
Recent ALICE collaboration measurements[1] showed a significant excess in J/$\psi$ yield at very low transverse momenta ($p_{T}<0.3$ GeV/$c$) in the peripheral Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV. The same behavior of the J/$\psi$ production is observed at STAR in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. These results are interpreted as coherent photoproduction of J/$\psi$ at...
Heavy quarks are useful probes to investigate the property of the hot and dense medium
created in high energy heavy ion collisions because they are produced via initial hard scattering
and thus are affected by the entire evolution of the medium.
The PHENIX experiment has measured open heavy flavor production via the measurement of
single lepton from the decay of inclusive heavy quarks in...
ALICE at the Large Hadron Collider (LHC) provides unique capabilities to study charmonium production at low transverse momenta. In the early and hottest phase of nucleus-nucleus collisions the formation of a Quark-Gluon Plasma (QGP) is expected. Several QGP induced effects, such as the suppression of charmonium states due to color screening and/or an enhancement due to (re)combination of...
