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:20260422T225842Z UID:IGFAEThsem/1 DESCRIPTION:Title: The other critical point: hydrodynamics and chiral symmetry breaking\nby Derek Teaney (Stonybrook University) as part of IGFAE Theory Seminar s\n\n\nAbstract\nFirst we analyze the evolution of hydrodynamic fluctuati ons for QCD matter below Tc in the chiral limit\, where the pions (the Go ldstone modes) must be treated as additional superfluid degrees of freedom . In the presence of a finite pion mass\, the hydrodynamic theory is ord inary hydrodynamics at long distances\, and superfluid-like at short dist ances. The presence of the superfluid degrees of freedom then gives specif ic contributions to the bulk viscosity\, the shear viscosity\, and diffus ion coefficients of the ordinary theory at long distances which we compute . This determines\, in some cases\, the leading dependence of the transpor t parameters of QCD on the pion mass. We analyze the predictions of this c omputation\, as the system approaches the $O(4) $ critical point.\n\nIf ti me permits I will discuss the computation of the dissipative superfluid pa rameters in kinetic theory. Specifically\, I will compute the axial charge diffusion coefficient and damping rate in chiral perturbation theory whic h are well defined when the pion mass is small compared to the mean free p ath.\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Yacine Mehtar (Brookhaven National Lab) DTSTART:20200616T140000Z DTEND:20200616T150000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/2 DESCRIPTION:Title: Towards a unification of gluon distributions at small and moderate x\nby Yacine Mehtar (Brookhaven National Lab) as part of IGFAE Theory Semi nars\n\n\nAbstract\nUnderstanding the relation between QCD evolution in th e Bjorken limit and the Regge limit is crucial to achieve a complete and s mooth picture of proton and nuclear structure. The hope in the small x reg ime\, where gluon density is expected to reach saturation and the naif par tonic picture is expected to break down\, was that by computing higher ord er corrections to small x evolution (BK equations) one would capture more and more of the physics at moderate x. However\, this research program has encountered some challenges. At NLO large collinear logarithms are pres ent and needs to be resummed spoiling the renormalization group structure established at LO.\n\nIn order to overcome these formal difficulties we pr opose to revisit the shock wave approach for high energy scattering by pr oposing a new gauge invariant operator definition of hadronic operators th at account systematically for the collinear limit of structure functions. I will discuss in particular inclusive DIS as a first application.\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Alba Soto Ontoso (Brookhaven National Lab) DTSTART:20200617T100000Z DTEND:20200617T110000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/3 DESCRIPTION:Title: Unravelling the inner structure of jets with dynamical grooming\nby Alba Soto Ontoso (Brookhaven National Lab) as part of IGFAE Theory Semina rs\n\n\nAbstract\nThe analysis of jet observables is crucial to study the theory of strong interactions\, QCD\, in the perturbative regime. These ph enomena also play an important role in constraining the background in sear ches 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 of the Q uark Gluon Plasma on QCD dynamics. However\, jet observables\, both in p+p and A+A collision\, are strongly affected by a wide range of processes\, such as hadronization\, underlying event or pileup\, that are hard to acco unt for in perturbation theory and conventional resummation techniques. Ai ming at reducing the jet’s sensitivity to non-local and non-perturbative physics\, several jet grooming techniques have been developed. In this ta lk\, I will introduce a new\nset of jet substructure observables and an as sociated grooming technique\, called dynamical grooming. It is rooted on i dentifying the hardest splitting in an angular ordered shower and discardi ng all splittings at larger angles. I will benchmark the method in QCD jet s with pQCD calculations of dynamically groomed observables at modified le ading-log accuracy that qualitatively agree with preliminary ALICE measure ments. Next\, the resilience to non-perturbative effects together with its performance on boosted W/top tagging will be assessed. Finally\, a Monte- Carlo study for dynamically groomed observables in heavy-ion collisions wi ll be presented.\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Olga Soloveva (FIAS) DTSTART:20200622T100000Z DTEND:20200622T110000Z DTSTAMP:20260422T225842Z 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 influence of the baryon chemical potential $\\mu_B$ on the dynamical properties of the Quark–Gluon–Plasma (QGP) in and out-of equilibrium. The description o f the QGP in equilibrium is based on the effective propagators and couplin gs from the Dynamical QuasiParticle Model (DQPM)that is matched to reprodu ce the equation-of-state of the partonic system above the deconfinement te mperature Tc from lattice Quantum Chromodynamics (QCD).\n\n We study the transport coefficients such as the ratio of the shear and bulk viscosities to the entropy density\, i.e. $\\eta/s$ and $\\zeta/s$\, the electric con ductivity $\\sigma_0/T$ as well as the baryon diffusion coefficient $\\ka ppa_B$ and compare to related approaches from the literature(non-conformal 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 results fr om lattice QCD at $\\mu_B$=0. Furthermore\,\nthere is only a very modest c hange of transport coefficients with the baryon chemical $\\mu_B$ as a fun ction of the scaled temperature $T/T_c(\\mu_B)$ where $T_c(\\mu_B)$ denote s the critical temperature at finite baryon chemical potential.\n\nThe out -of equilibrium study of the QGP is performed within the Parton–Hadron –String Dynamics (PHSD) transport approach extended in the partonic sect or by explicitly calculating the total and differential partonic scatterin g cross sections based on the DQPM and the evaluated at actual temperature T and baryon chemical potential $\\mu_B$ in each individual space-time ce ll where partonic scattering takes place. The traces of their $\\mu_B$ dep endencies are investigated in different observables for symmetric Au + Au and asymmetric Cu + Au collisions such as rapidity and m_T-distributions a nd directed and elliptic flow coefficients v1\, v2 in the energy range \\ sqrt{s_{NN}} from 7.7 GeV to 200 GeV.\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Michael Strickland (Kent State University) DTSTART:20200513T140000Z DTEND:20200513T150000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/5 DESCRIPTION:Title: Non-equilibrium attractor in high-temperature QCD plasmas\nby Micha el Strickland (Kent State University) as part of IGFAE Theory Seminars\n\n Abstract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Savvas Zafeiropoulos (CNRS) DTSTART:20200520T100000Z DTEND:20200520T110000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/6 DESCRIPTION:Title: Parton distribution functions from Lattice QCD\nby Savvas Zafeiropo ulos (CNRS) as part of IGFAE Theory Seminars\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Evangelos Sfakianakis (NIKHEF) DTSTART:20200527T100000Z DTEND:20200527T110000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/7 DESCRIPTION:Title: Gravitational waves from non-abelian gauge fields during inflation\ nby Evangelos Sfakianakis (NIKHEF) as part of IGFAE Theory Seminars\n\nAbs tract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Jacquelyn Noronha-Hostler DTSTART:20200316T150000Z DTEND:20200316T160000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/8 DESCRIPTION:Title: System size scan of D meson 𝑅AA and 𝑣𝑛 using PbPb\, XeXe\, ArA r\, and OO collisions at LHC\nby Jacquelyn Noronha-Hostler as part of IGFAE Theory Seminars\n\nLecture held in Block IV-Sala de Xuntas.\nAbstrac t: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Jorge Noronha DTSTART:20200318T150000Z DTEND:20200318T160000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/9 DESCRIPTION:Title: Relativistic Fluid Dynamics: From Particle Colliders to Neutron Star Me rgers\nby Jorge Noronha as part of IGFAE Theory Seminars\n\nLecture he ld in Block IV-Sala de Xuntas.\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/9/ END:VEVENT BEGIN:VEVENT SUMMARY:David Mueller DTSTART:20200325T110000Z DTEND:20200325T120000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/10 DESCRIPTION:Title: Momentum broadening in the Glasma\nby David Mueller as part of IGF AE Theory Seminars\n\nLecture held in Block IV-Sala de Xuntas.\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Watse Sybesma DTSTART:20200326T110000Z DTEND:20200326T120000Z DTSTAMP:20260422T225842Z UID:IGFAEThsem/11 DESCRIPTION:Title: Complexity and Page curve for an evaporating black hole in flat space< /a>\nby Watse Sybesma as part of IGFAE Theory Seminars\n\nLecture held in Block IV-Sala de Xuntas.\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/IGFAEThsem/11/ END:VEVENT END:VCALENDAR