BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Derek Teaney (Stonybrook University) DTSTART:20200603T140000Z DTEND:20200603T150000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/1 DESCRIPTION:Title: The other critical point: hydrodynamics and chiral symmetry brea king\nby Derek Teaney (Stonybrook University) as part of IGFAE Theory Seminars\n\n\nAbstract\nFirst we analyze the evolution of hydrodynamic fl uctuations for QCD matter below Tc in the chiral limit\, where the pions (the Goldstone modes) must be treated as additional superfluid degrees of freedom. In the presence of a finite pion mass\, the hydrodynamic theory is ordinary hydrodynamics at long distances\, and superfluid-like at sho rt distances. The presence of the superfluid degrees of freedom then gives specific contributions to the bulk viscosity\, the shear viscosity\, and diffusion coefficients of the ordinary theory at long distances which we compute. This determines\, in some cases\, the leading dependence of the t ransport parameters of QCD on the pion mass. We analyze the predictions of this computation\, as the system approaches the $O(4) $ critical point.\n \nIf time permits I will discuss the computation of the dissipative superf luid parameters in kinetic theory. Specifically\, I will compute the axial charge diffusion coefficient and damping rate in chiral perturbation theo ry which are well defined when the pion mass is small compared to the mean free path.\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Yacine Mehtar (Brookhaven National Lab) DTSTART:20200616T140000Z DTEND:20200616T150000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/2 DESCRIPTION:Title: Towards a unification of gluon distributions at small and modera te x\nby Yacine Mehtar (Brookhaven National Lab) as part of IGFAE Theo ry Seminars\n\n\nAbstract\nUnderstanding the relation between QCD evolutio n in the Bjorken limit and the Regge limit is crucial to achieve a complet e and smooth picture of proton and nuclear structure. The hope in the smal l x regime\, where gluon density is expected to reach saturation and the n aif partonic picture is expected to break down\, was that by computing hig her order corrections to small x evolution (BK equations) one would captur e more and more of the physics at moderate x. However\, this research prog ram has encountered some challenges. At NLO large collinear logarithms a re present and needs to be resummed spoiling the renormalization group str ucture established at LO.\n\nIn order to overcome these formal difficultie s we propose to revisit the shock wave approach for high energy scattering by proposing a new gauge invariant operator definition of hadronic opera tors that account systematically for the collinear limit of structure fun ctions. I will discuss in particular inclusive DIS as a first application. \n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Alba Soto Ontoso (Brookhaven National Lab) DTSTART:20200617T100000Z DTEND:20200617T110000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/3 DESCRIPTION:Title: Unravelling the inner structure of jets with dynamical grooming< /a>\nby Alba Soto Ontoso (Brookhaven National Lab) as part of IGFAE Theory Seminars\n\n\nAbstract\nThe analysis of jet observables is crucial to stu dy the theory of strong interactions\, QCD\, in the perturbative regime. T hese phenomena also play an important role in constraining the background in searches for heavy particles beyond the Standard Model\, a cornerstone in the physics program of\nthe LHC. In the context of heavy-ion collisions \, jet physics is immersed into the precision era to quantify the effect o f the Quark Gluon Plasma on QCD dynamics. However\, jet observables\, both in p+p and A+A collision\, are strongly affected by a wide range of proce sses\, such as hadronization\, underlying event or pileup\, that are hard to account for in perturbation theory and conventional resummation techniq ues. Aiming at reducing the jet’s sensitivity to non-local and non-pertu rbative physics\, several jet grooming techniques have been developed. In this talk\, I will introduce a new\nset of jet substructure observables an d an associated grooming technique\, called dynamical grooming. It is root ed on identifying the hardest splitting in an angular ordered shower and d iscarding all splittings at larger angles. I will benchmark the method in QCD jets with pQCD calculations of dynamically groomed observables at modi fied leading-log accuracy that qualitatively agree with preliminary ALICE measurements. Next\, the resilience to non-perturbative effects together w ith its performance on boosted W/top tagging will be assessed. Finally\, a Monte-Carlo study for dynamically groomed observables in heavy-ion collis ions will be presented.\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Olga Soloveva (FIAS) DTSTART:20200622T100000Z DTEND:20200622T110000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/4 DESCRIPTION:Title: QGP dynamics at finite chemical potential\nby Olga Soloveva (FIAS) as part of IGFAE Theory Seminars\n\n\nAbstract\nWe study the influe nce of the baryon chemical potential $\\mu_B$ on the dynamical properties of the Quark–Gluon–Plasma (QGP) in and out-of equilibrium. The descri ption of the QGP in equilibrium is based on the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM)that is matched to reproduce the equation-of-state of the partonic system above the deconfine ment temperature Tc from lattice Quantum Chromodynamics (QCD).\n\n We stu dy the transport coefficients such as the ratio of the shear and bulk visc osities to the entropy density\, i.e. $\\eta/s$ and $\\zeta/s$\, the elect ric conductivity $\\sigma_0/T$ as well as the baryon diffusion coefficien t $\\kappa_B$ and compare to related approaches from the literature(non-co nformal holographic model\, lattice QCD\, NJL). We find that the ratios $\ \eta/s$ and $\\zeta/s$ as well as $\\sigma_0/T$ are in accord with the res ults from lattice QCD at $\\mu_B$=0. Furthermore\,\nthere is only a very m odest change of transport coefficients with the baryon chemical $\\mu_B$ a s a function of the scaled temperature $T/T_c(\\mu_B)$ where $T_c(\\mu_B)$ denotes the critical temperature at finite baryon chemical potential.\n\n The out-of equilibrium study of the QGP is performed within the Parton–H adron–String Dynamics (PHSD) transport approach extended in the partonic sector by explicitly calculating the total and differential partonic scat tering cross sections based on the DQPM and the evaluated at actual temper ature T and baryon chemical potential $\\mu_B$ in each individual space-ti me cell where partonic scattering takes place. The traces of their $\\mu_B $ dependencies are investigated in different observables for symmetric Au + Au and asymmetric Cu + Au collisions such as rapidity and m_T-distributi ons and directed and elliptic flow coefficients v1\, v2 in the energy rang e \\sqrt{s_{NN}} from 7.7 GeV to 200 GeV.\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Michael Strickland (Kent State University) DTSTART:20200513T140000Z DTEND:20200513T150000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/5 DESCRIPTION:Title: Non-equilibrium attractor in high-temperature QCD plasmas\nb y Michael Strickland (Kent State University) as part of IGFAE Theory Semin ars\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Savvas Zafeiropoulos (CNRS) DTSTART:20200520T100000Z DTEND:20200520T110000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/6 DESCRIPTION:Title: Parton distribution functions from Lattice QCD\nby Savvas Za feiropoulos (CNRS) as part of IGFAE Theory Seminars\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Evangelos Sfakianakis (NIKHEF) DTSTART:20200527T100000Z DTEND:20200527T110000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/7 DESCRIPTION:Title: Gravitational waves from non-abelian gauge fields during inflati on\nby Evangelos Sfakianakis (NIKHEF) as part of IGFAE Theory Seminars \n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Jacquelyn Noronha-Hostler DTSTART:20200316T150000Z DTEND:20200316T160000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/8 DESCRIPTION:Title: System size scan of D meson 𝑅AA and 𝑣𝑛 using PbPb\, XeX e\, ArAr\, and OO collisions at LHC\nby Jacquelyn Noronha-Hostler as p art of IGFAE Theory Seminars\n\nLecture held in Block IV-Sala de Xuntas.\n Abstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Jorge Noronha DTSTART:20200318T150000Z DTEND:20200318T160000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/9 DESCRIPTION:Title: Relativistic Fluid Dynamics: From Particle Colliders to Neutron Star Mergers\nby Jorge Noronha as part of IGFAE Theory Seminars\n\nLec ture held in Block IV-Sala de Xuntas.\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/9/ END:VEVENT BEGIN:VEVENT SUMMARY:David Mueller DTSTART:20200325T110000Z DTEND:20200325T120000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/10 DESCRIPTION:Title: Momentum broadening in the Glasma\nby David Mueller as part of IGFAE Theory Seminars\n\nLecture held in Block IV-Sala de Xuntas.\nAbs tract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Watse Sybesma DTSTART:20200326T110000Z DTEND:20200326T120000Z DTSTAMP:20260404T094700Z UID:IGFAEThsem/11 DESCRIPTION:Title: Complexity and Page curve for an evaporating black hole in flat space\nby Watse Sybesma as part of IGFAE Theory Seminars\n\nLecture h eld in Block IV-Sala de Xuntas.\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/IGFAEThsem/11/ END:VEVENT END:VCALENDAR