Quark Matter 2015 - XXV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

Session

Electromagnetic Probes II

30-6

30 Sept 2015, 10:50

Kobe, Fashion Mart, Japan

Conveners

Electromagnetic Probes II

• Harald Appelshaeuser (Johann-Wolfgang-Goethe Univ. (DE))

363. PHENIX results on low-mass dileptons in Au$+$Au collisions with the Hadron Blind Detector

Mihael Makek (PMF)

30/09/2015, 10:50

Electromagnetic Probes

Contributed talk

Dileptons are an important probe of the dense medium created in heavy-ion collisions, with sensitivity to chiral symmetry restoration, thermal radiation and in-medium effects. The PHENIX Hadron-Blind Detector (HBD), which took data during RHIC runs 2009--2010, is a proximity-focusing \v{C}erenkov detector operated with pure CF4, directly coupled to a triple GEM readout in a windowless...

290. System-size and energy dependences of dielectron excess invariant-mass spectra at STAR

Mr Shuai Yang (University of Science and Technology of China)

30/09/2015, 11:10

Electromagnetic Probes

Contributed talk

Dilepton measurements play an essential role in the study of hot and dense nuclear matter, created in heavy-ion collisions. Dileptons are produced in the whole evolution of the system and escape with minimum interaction with the strongly interacting medium. Thus, they provide information about the various stages of the system during the evolution. In the low mass region ($M_{ee}<1.1$...

566. Low-Mass Dielectron Measurements in pp, p-Pb and Pb-Pb Collisions with ALICE

Patrick Simon Reichelt (Johann-Wolfgang-Goethe Univ. (DE))

30/09/2015, 11:30

Electromagnetic Probes

Contributed talk

The measurement of electron-positron pairs (dielectrons) in the low invariant mass region allows to study the vacuum and in-medium properties of light vector mesons. Additionally, dielectrons from semileptonic decays of correlated heavy quark mesons carry information on the heavy-flavour production in the different collision systems. To quantify modifications of the dielectron production in...

516. Vector boson production in p+Pb and Pb+Pb collisions measured with ATLAS at the LHC

Iwona Grabowska-Bold (AGH University of Science and Technology (PL))

30/09/2015, 11:50

Electromagnetic Probes

Contributed talk

Electroweak boson production processes (W, Z and photon) provide access to the earliest moments of heavy ion collisions. Furthermore, because they do not undergo strong interactions, they are sensitive to the initial-state geometry of the collision and potentially the details of the nuclear parton distribution functions (PDF). ATLAS results on vector boson yields have demonstrated binary...

685. W and Z bosons in pp, pPb and PbPb with CMS

Emilien Chapon (Centre National de la Recherche Scientifique (FR))

30/09/2015, 12:10

Electromagnetic Probes

Contributed talk

Electroweak boson production is an important benchmark process in high-energy heavy-ion collisions at the LHC. W and Z bosons do not participate in the strong interaction and their leptonic decays provide medium-blind probes of the initial state of the collisions. The final results on the W and Z production in pPb collisions at 5.02 TeV, combining both the muon and electron channels, will be...