MIAPP Programme 2018 Heavy Ion

Session

Week 3

10 Sept 2018, 09:30

MIAPP

2. Open heavy-flavour: present measurements and future directions

Andre Mischke (ERC-Research Group QGP - ALICE, Utrecht University)

10/09/2018, 09:30

Week 3

Strongly interacting matter at high temperatures and large densities can be created and carefully studied under laboratory conditions in high-energy collisions of heavy atomic nuclei. Especially, heavy quarks (charm and beauty) provide particular good probes to study the QCD plasma and its evolution since they are predominantly produced in initial hard partonic scattering processes in the...

3. Heavy quarkonium dissociation by thermal gluons in the QGP

Dr Min He (Nanjing University of Science & Technology)

10/09/2018, 11:30

Week 3

Using the chromo-electric dipole coupling Hamiltonian from QCD multipole expansion, we derive the dissociation cross sections of heavy quarkonia by thermal gluons at next-to-leading order (NLO, also known as inelastic parton scattering dissociation) in the Quark-Gluon Plasma (QGP) in the framework of second order quantum mechanical perturbation theory. While suffering divergence (infrared and...

15. Quarkonium production in p-A collisions: a tool for estimating non-QGP effects in AA,?

Enrico Scomparin (INFN Torino (Italy))

11/09/2018, 09:30

Week 3

Results on quarkonium production in p-Pb collisions from LHC run-1 and run-2 have now reached a considerable accuracy and represent, together with RHIC findings, an important tool for the study of cold nuclear matter effects. While for strongly bound states those effects are probably dominated by nuclear shadowing, excited quarkonium states have been shown to be affected by additional...

31. Potential of LHCb in heavy-ion collisions

Michael Winn (Paris-Saclay)

11/09/2018, 11:30

Week 3

LHCb is one of the four large experiments at the LHC. It has taken ion-ion collisions and dedicated fixed-target data samples for the first time in 2015. In this contribution, we will discuss not yet exploited experimental possibilities for this forward acceptance detector both in the correlation as well as in the heavy-flavour sector. The goal is to trigger an open discussion on new ideas...

14. Heavy Flavor Azimuthal Correlations in Cold Nuclear Matter

Ramona Vogt (LLNL and UC Davis)

12/09/2018, 09:30

Week 3

It has been proposed that the azimuthal distributions of heavy flavor quark-antiquark pairs may be modified in the medium of a heavy-ion collision. This assumption is tested through next-to-leading order (NLO) calculations of the azimuthal distribution, $d\sigma/d\phi$, including transverse momentum broadening, employing $\langle k_T^2 \rangle$ and fragmentation in exclusive $Q \overline Q$...

48. Reсent results on low-mass dielectron production in pp and Pb--Pb collisions with ALICE

Ivan Vorobyev (TUM)

12/09/2018, 11:30

Low-mass e$^+$e$^−$ pairs are a particularly useful probe to study the hot and dense medium created in ultra-relativistic heavy-ion collisions. Such pairs are produced during all stages of the collision and carry information about the whole space-time evolution of the system, unperturbed by strong final-state interactions.

The invariant-mass ($m_{ee}$) continuum of dielectrons is extremely...

44. Physics opportunities with A high luminosity Fixed Target ExpeRiment at the LHC (AFTER@LHC)

Cynthia Hadjidakis (Centre National de la Recherche Scientifique (FR))

13/09/2018, 09:30

Week 3

By extracting the beam with a bent crystal or by using an internal gas target, the multi-TeV proton and lead LHC beams allow one to perform the most energetic fixed-target experiments ever and to study pp, pd and pA collisions at sqrt(sNN)=115 GeV and Pbp and PbA collisions at sqrt(sNN)=72 GeV with high precision and modern detection techniques. A broad programme, covering the large-x frontier...

36. Loop functions in thermal QCD

Antonio Vairo (TUM)

14/09/2018, 09:30

Week 3

We present recent computations of loop functions in thermal QCD like the Polyakov loop, correlators of Polyakov loops and Wilson lines, and the cyclic Wilson loop. We discuss divergences and how to renormalize them. Finally we compare with lattice data.

33. Nuclear PDF and heavy flavor production

Dr Hua-Sheng Shao (LPTHE Paris)

Week 3

I will discuss the LHC heavy flavor data in pA collisions to constrain the gluon density at low x in nuclei, where no other data exist. Our results show strong gluon shadowing at low x compared to proton PDF and significant reduction of the current (underestimated) nPDF errors. Its implications for the heavy-ion physics will also be discussed.