Conveners
High Transverse Momentum Light and Heavy Flavor Hadrons
- Yves Schutz Schutz (CERN/IN2P3)
High Transverse Momentum Light and Heavy Flavor Hadrons
- Harald Appelshauser (University of Frankfurt)
High Transverse Momentum Light and Heavy Flavor Hadrons
- Karel Safarik (CERN)
Description
High Transverse Momentum Light and Heavy Flavor Hadrons
Dr
Gines MARTINEZ GARCIA
(SUBATECH)
04/11/2013, 13:30
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
The LHC heavy-ion physics program aims at investigating the properties of strongly- interacting matter in extreme conditions of temperature and energy density, where the formation of the Quark Gluon Plasma (QGP) is expected. In high-energy heavy-ion collisions, heavy quarks are regarded as efficient probes of the properties of the QGP as they are created on a very short time scale in initial...
Prof.
Pol Gossiaux
(SUBATECH)
04/11/2013, 13:50
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Besides the traditional heavy-quark observables, like the nuclear modification factor and the elliptic flow, azimuthal correlations of heavy quarks and antiquarks have the potential to give new insight into the interactions with the medium.
Due to the scatterings with the light medium constituents heavy quarks and antiquarks are deflected from their original direction and the initial...
Shanshan Cao
(Duke University)
04/11/2013, 14:10
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Heavy flavor serves as a valuable probe of the transport properties of the quark-gluon plasma created in relativistic heavy-ion collisions. Within the framework of a Langevin equation coupled to a (2+1)-dimensional viscous hydrodynamic model, we introduce an algorithm that incorporates not only collisional, but also radiative energy loss for heavy quarks by treating the medium-induced gluon...
Prof.
Zhenyu Ye
(University of Illinois at Chicago)
04/11/2013, 14:30
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Heavy flavor quarks are dominantly produced in the initial hard interactions in high energy heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC). Their interaction with QCD medium is sensitive to the medium dynamics. Thus heavy flavor quarks are suggested as an ideal probe to study the properties of the hot and dense nuclear matter created at RHIC. In this talk, we will present...
Andrea Rossi
04/11/2013, 14:50
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Heavy quarks, i.e. charm and beauty, are considered calibrated probes of the strongly interacting deconfined medium (Quark Gluon Plasma) formed in heavy-ion collisions. Produced in hard scattering processes in the initial stages of the collision, they interact with the medium, lose energy and, depending on the coupling strength to the medium, take part in the collective motion of the QGP...
Dr
Barbara Betz
(Frankfurt University)
04/11/2013, 15:10
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Recent data on the azimuthal and transverse momentum dependence of high-pT pion nuclear modification factors in nuclear collisions at RHIC and LHC are analyzed in terms of a wide class of jet-energy loss models, ranging from running coupling pQCD based prescriptions to AdS/CFT-inspired models, considering a variety of transverse expanding collective flow backgrounds. RHIC data are found to be...
Dr
Marzia Nardi
(INFN Torino)
04/11/2013, 16:00
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
A multi-step setup for heavy-flavour studies in high-energy nucleus-nucleus collisions is presented. The initial hard production of Q-Qbar pairs is simulated with the POWHEG pQCD event generator, interfaced with the PYTHIA parton shower.
Outcomes of the calculations are compared to experimental data in p-p collisions and are used as a validated benchmark for the study of medium effects....
Dr
Denes Molnar
(Purdue University)
04/11/2013, 16:20
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
The PHENIX Collaboration has argued that azimuthal angle dependent pi0
suppression in Au+Au at RHIC poses a challenge for perturbative QCD
energy loss models. However, recent work by Betz and Gyulassy claims
simultaneous reproduction of this set of observables with simple
pQCD-motivated energy loss formulas. We study and contrast different
bulk medium evolution models (based on...
Dr
Antonio Ortiz Velasquez
(Div. of Particle Physics, Lund University, Sweden)
04/11/2013, 16:40
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
ALICE has unique capabilities among the LHC experiments for particle identification (PID) at mid-rapidity over a wide range of transverse momentum ($p_{\rm T}$). For $p_{\rm T}$ between $\sim 100$ MeV/$c$ up to 3-4 GeV/$c$ (anti)protons, charged pions and kaons can be separated through the measurement of the specific energy loss (${\rm d}E/{\rm d}x$) in gas (silicon) with TPC (ITS) and time of...
Liliana Apolinário
(Universidade de Santiago de Compostela)
04/11/2013, 17:00
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
In this work we improve existing calculations of radiative energy loss by computing corrections that implement energy-momentum conservation, previously only implemented a posteriori, in a rigorous way. Using the path-integral formalism, we compute in-medium splittings allowing transverse motion of all particles in the emission process, thus relaxing the assumption that only the softest...
Carsten Greiner
(Goethe University Frankfurt)
04/11/2013, 17:20
Jet Quenching and Observables
Oral
An updated version of the partonic transport model Boltzmann Approach to MultiParton Scatterings (BAMPS) is presented, which allows interactions among all partons: gluons, light quarks, and heavy quarks with elastic and inelastic collisions. We introduce the improved Gunion-Bertsch matrix element, which cures problems of the original Gunion-Bertsch result in characteristic regions of the phase...
Dr
Takao Sakaguchi
(Brookhaven National Laboratory)
04/11/2013, 17:40
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
PHENIX has been measuring high pT identified hadrons such as pi0 or eta since the beginning of the RHIC running. These measurements along with the baseline direct photon measurement led to the discovery of parton energy loss, a final state interaction with a medium, the quark-gluon plasma.
After accumulation of additional statistics in recent RHIC Au+Au runs, we were able to not only...
Dr
Pol Gossiaux
(subatech)
05/11/2013, 13:30
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Recently, we have proposed a microscopic approach for the quenching and thermalisation of heavy quarks (HQ) in URHIC
\cite{Gossiaux:2008,Gossiaux:2009,Gossiaux:2010,Gossiaux:2011}, assuming that they interact with light partons through both elastic and radiative processes evaluated by resorting to some parameterization of the running coupling constant, while those partons are spatially...
Jan Uphoff
(Goethe University Frankfurt)
05/11/2013, 13:50
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
The full space-time evolution of heavy quarks and light partons in ultra-relativistic heavy-ion collisions is studied within the partonic transport model Boltzmann Approach to MultiParton Scatterings (BAMPS). We discuss in detail for all flavors the influence of elastic and radiative energy loss with a running coupling. Radiative processes, in particular, are implemented through an improved...
Kurt Jung
(Purdue University)
05/11/2013, 14:10
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Modification to jets in high-energy heavy-ion collisions is expected to depend on the flavor of the fragmenting parton. To disentangle this flavor dependence, jets from heavy quark fragmentation are identified in heavy ion collisions. Jets are first tagged by their secondary vertices and the contribution from bottom quarks is extracted using template fits to their secondary vertex mass...
Elienos Pereira De Oliveira Filho
05/11/2013, 14:30
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Heavy-ion collisions at the LHC provide an opportunity to investigate the properties of QCD matter at high temperatures and energy densities, where a transition to a Quark- Gluon Plasma state is expected to occur. In order to study the QGP properties, a given observable is often measured in different collision systems (pp, p-Pb and Pb-Pb) and multiplicity classes.
Heavy quarks, i. e. charm...
Andrej Ficnar
(Columbia University)
05/11/2013, 14:50
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
Previous holographic models of jet quenching in AdS/CFT via “falling strings” were found to be incompatible with the recent LHC data in arXiv:1208.0305. A new set of “shooting string” holographic jet initial configurations with finite momentum at string endpoints was proposed in arXiv:1306.6648 that suggests a more natural scheme for determining the instantaneous rate of energy loss of jets in...
Mr
Manoel Rodríguez Calvo
(Universidade de Santiago de Compostela - IPhT CEA Saclay)
05/11/2013, 15:10
High Transverse Momentum Light and Heavy Flavor Hadrons
Oral
We derive the radiation spectrum of a massive quark-gluon antenna in a QCD medium. The calculation is done in the formalism of the classical Yang-Mills (CYM) equations and interactions with the medium are handled in the harmonic oscillator approximation, valid for soft gluon emissions. We discuss the effect produced by the presence of a mass scale and compare the results with the massless...
