CERN Accelerating science

Video Lectures

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2021-01-15
16:32
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Probing the initial stages of heavy ion collisions with direct photons at PHENIX / Esha, Roli (speaker) (Center for Frontiers in Nuclear Science, Stony Brook University)
Direct photons are emitted unscathed from all the stages of the relativistic heavy ion collisions and therefore are an excellent probe to study the properties of Quark Gluon Plasma (QGP) as they do not interact strongly with the medium. PHENIX has already measured a direct photon excess in Au+Au collisions at 200 GeV in the low momentum region with respect to p+p collisions. [...]
2021 - 0:18:00. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
16:28
Nonperturbative properties of overoccupied gluonic plasmas / Boguslavski, Kirill (speaker) (Vienna University of Technology (AT))
In ultrarelativistic heavy-ion collisions a quark-gluon plasma is created. Its pre-equilibrium evolution includes some fascinating phenomena of QCD. [...]
2021 - 0:18:03. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
15:44
Dynamical initialization of hydrodynamics for heavy-ion collisions at Beam Energy Scan energies / Du, Lipei (speaker) (The Ohio State University)
At Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) energies, the dynamics of the pre-hydrodynamic stage and the effects from a nonzero net baryon current become essential components of the dynamical evolution of the collision fireball. We develop a (3+1)-dimensional initial stage model for both energy-momentum and the net baryon current, as dynamical initial conditions for a hydrodynamic evolution module, before the colliding nuclei interpenetrate and the produced system gets completely hydrodynamized. [...]
2021 - 0:17:13. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
15:44
Observation of impact parameter dependence of $\mu^{+}\mu^{-}$ acoplanarity in ultra-peripheral PbPb collisions / Yang, Shuai (speaker) (Rice University)
The CMS Collaboration reports on new differential measurements of $\gamma\gamma \rightarrow \mu^{+}\mu^{-}$ production in ultra-peripheral PbPb collisions at $\sqrt{s_{\rm NN}}$ = 5.02~TeV, using data collected during the 2018 LHC run with an integrated luminosity of 1.5~nb$^{-1}$. Photon-photon interactions have been observed in hadronic heavy-ion collisions by STAR and ALTAS experiments at very low transverse momentum ($p_T$) regions and the measured $p_T$ and azimuthal angular correlations of lepton pairs via $\gamma\gamma$ scattering in hadronic events exhibit significant broadening compared to that from vacuum production in ultra-peripheral events. [...]
2021 - 0:22:58. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
15:44
Invited: Recent developments in UPC / Cole, Brian (speaker) (Columbia University (US))
2021 - 0:27:16. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
15:44
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Hard probes production in pPb collisions at LHCb / Luo, Yiheng (speaker) (Tsinghua University (CN))
Within the p-Pb data sample collected by the LHCb detector at sqrt(s_NN) = 8.16 TeV, a rich set of open charm hadrons is observed with abundant statistics. Thanks to the LHCb forward acceptance that is complementary to general purpose detectors, with excellent performance in particle reconstruction and identification,these charm states are studied down to zero pT with overwhelming precision. In this talk, we present latest measurements of charm mesons in pPb collisions by LHCb. [...]
2021 - Streaming video. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
15:06
Invited: MPI in HI / Gaunt, Jonathan Richard (speaker)
2021 - 0:27:35. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
14:31
Dynamical modeling of the initial energy-momentum and baryon charge distributions for heavy-ion collisions at RHIC Beam Energy Scan energies / Shen, Chun (speaker) (Wayne State University)
Building upon Ref. [1], we present an improved three-dimensional dynamical initialization model for heavy-ion collisions, implementing local energy-momentum conservation and baryon charge fluctuations at string junctions [2] [...]
2021 - 0:25:39. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
14:30
Probing heavy quark dynamics via multiparticle azimuthal correlations of D0 mesons in PbPb collisions at 5.02 TeV / Zhang, Liuyao (speaker) (Rice University (US))
In this presentation, we show measurements of the second Fourier coefficient of the azimuthal distribution (elliptic flow, v2) of prompt D0 and D0bar mesons using the four-particle cumulants technique at midrapidity (|y| < 1). These measurements are performed using data from PbPb collisions at 5.02 TeV collected by the CMS detector at the LHC in 2018. [...]
2021 - 0:20:38. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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2021-01-15
14:29
First measurements of genuine three-harmonic correlations in Pb-Pb collisions with ALICE / Mordasini, Cindy (speaker) (Technische Universitaet Muenchen (DE))
Multiparticle azimuthal correlations have proved their usefulness to study and constrain the properties of the quark-gluon plasma (QGP) produced in ultrarelativistic heavy-ion collisions. Recently, the event-by-event correlated fluctuations between two different flow amplitudes have been measured using Symmetric Cumulants. [...]
2021 - 0:19:59. Conferences; Initial Stages 2021 External links: Talk details; Event details In : Initial Stages 2021

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