Conveners
Open heavy flavour: I
- Magdalena Djordjevic (Institute of Physics Belgrade)
Open heavy flavour: II
- Silvia Masciocchi (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Open heavy flavour: III
- Burkhard Schmidt (CERN)
the study of charm production in heavy-ion collisions is considered an excellent probe to study the properties of the hot and dense medium created in heavy-ion collisions. Measurements of D- meson nuclear modification, elliptic and triangular flow in PbPb collisions can provide strong constraints into the mechanisms of in-medium energy loss and charm flow in the medium. The measurement of...
Heavy quarks, i.e. charm and beauty, are formed on a shorter time scale with respect to the strongly-interacting Quark-Gluon Plasma (QGP) produced in high-energy heavy-ion collisions. Therefore, they are sensitive probes to study the mechanisms of parton energy loss, hadronisation in the hot and dense medium, the medium evolution and its transport coefficients. The heavy-flavour nuclear...
We study the propagation of charm and bottom quarks in the quark-gluon plasma (QGP) by means of a relativistic Boltzmann transport approach that in the large M/T limit recovers the standard Langevin dynamics. The non-perturbative interaction between heavy quarks and light quarks is described by means of a quasi-particle approach in which light partons are dressed with thermal masses. The last...
Heavy flavor quarks are unique tools for studying the properties of the Quark Gluon Plasma (QGP) produced in high-energy nuclear collisions. In this talk we will present measurements of various charm hadrons ($\Lambda^{\pm}_{c}$, $D^{\pm}_{s}$, $D^{*\pm}$, $D^{\pm}$ and $D^0$ ($\bar{D}^0$), as well as open bottom production through displaced decay daughters ($B\rightarrow J/\psi$, $D^0$, $e$),...
Experimental results at RHIC and at the LHC show the same strong suppression for
light and heavy quark probes at high $p_T$, and a possible quark mass
dependence at low $p_T$. More high precision measurements of separated charm and bottom are needed to quantify the dependence of medium energy loss on the quark mass.
The PHENIX Experiment measures electrons from heavy flavor decays using...
Beauty quark production in heavy-ion collisions is considered to be one of the key measurements to address the flavour-dependence of in-medium energy loss in heavy-ion collisions. On the other hand, the measurement of the production of strange beauty mesons can provide fundamental insights into the relevance of mechanisms of beauty recombination in the quark-gluon plasma. In this talk, we will...
Heavy quarks serve as valuable probes of the QGP properties as well as the mass hierarchy of parton energy loss. Experimental data at the LHC indicate significant nuclear modification of heavy flavor ($D$ & $B$) meson production that is comparable to light flavor hadrons, which seem contradictory to one’s earlier expectation of $\Delta E_g > \Delta E_q > \Delta E_c > \Delta E_b$. We extended...
Due to their large mass, the interactions of heavy quarks with the quark-gluon plasma (QGP) may be different from those of light quarks. The lightest charm baryon is the $\Lambda_C^{+}$, composed of a charm quark and two light quarks. Measurements of $\Lambda_C^{+}$ production in both pp and PbPb collisions can provide important inputs to the understanding of heavy quark transport in the QGP...
Heavy quarks (charm and beauty) are a powerful probe of the Quark-Gluon Plasma (QGP) formed in high-energy heavy-ion collisions. They are produced in hard
scattering processes on a timescale shorter than the QGP formation time and experience the whole system evolution. The measurement of the nuclear modification factor ($R_{\rm AA}$) of open heavy flavours can provide important information...
Since heavy quarks are predominantly created in the initial hard scatterings in a heavy-ion collision, they can access the information of the early time dynamics. Recently, it has been predicted that the transient magnetic field generated in heavy-ion collisions can induce a larger directed flow ($v_{1}$) for heavy quarks than for light quarks. The model calculation also suggests opposite...
We employ the POWLANG transport setup, developed over the last few years, to provide new predictions for several heavy-flavour observables in relativistic heavy-ion collisions from RHIC to LHC center-of-mass energies. In particular, we focus on the development of the flow-harmonics v2 and v3 arising from the initial geometric asymmetry in the initial conditions and its associated...
The breaking of longitudinal boost invariance in non-central relativistic heavy ion collisions due to asymmetric local participant densities gives rise to a tilt in the reaction plane in the thermalized medium. A direct consequence of this is the observed rapidity odd directed flow of charged particles. We study the $v_1$ of $D$ and $\bar{D}$ mesons by evolving the charm quark phase space...
A rich set of open heavy flavour states is observed by LHCb in pPb collisions data collected at 5 and 8.16 TeV nucleon-nucleon center-of-mass energy. Results include the new measurements of production of beauty hadrons in pA collisions through cleanly reconstructed exclusive decays. Open charm states include the Lambda_c baryon, that was also observed in pA collisions for the first
time by LHCb.
Measurements of heavy flavor hadron production and their correlations in A+A collisions provide insight into the energy loss mechanism and transport properties of heavy quarks in the QGP. From this perspective, the same measurements in $p$+A collisions thus serve as a necessary baseline for understanding the observations in A+A collisions. Additionally, detailed studies of the azimuthal...
Measurements of open heavy flavour production in p-A collisions allow us to investigate Cold Nuclear Matter (CNM) effects, like gluon shadowing, gluon saturation, $k_{\rm T}$ broadening, and energy loss in CNM, that can affect the production rate and the kinematic properties of charm and beauty hadrons in nuclear collisions. In recent years, also the formation of a small-size Quark-Gluon...
Dilepton spectra are a classic probe to study ultra-relativistic heavy ion
collisions. At RHIC energies, the dimuon continuum is dominated by correlated pairs from charm and bottom semi-leptonic decays and the Drell-Yan process. No Drell-Yan measurement had been made at $\sqrt{s_{NN}}=200$ GeV to date. A precise measurement of the Drell-Yan cross-section can provide constraints to PDFs. The...
Understanding properties of Quark-Gluon Plasma requires an unbiased comparison of experimental data with theoretical predictions. To that end, we developed the dynamical energy loss formalism which, in distinction to most other methods, takes into account a realistic medium composed of dynamical scattering centers. The formalism also allows making numerical predictions for a wide number of...
