BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Matheus Hostert (University of Minnesota) DTSTART:20200518T160000Z DTEND:20200518T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/1 DESCRIPTION:Title: Dark neutrino sectors and low energy experiments\nby Matheus Hostert (University of Minnesota) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nI will present a simple and minimal three-portal model for neutrino masses with a hidden U(1)' symmetry based on low-scale variants of the seesaw mechanism. In our model\, the heavy ne utral leptons have large hidden interactions\, and through kinetic and sca lar mixing\, can lead to significantly different experimental signatures f rom the usual Type-I Seesaw fermions. I will discuss the implications for the Low Energy MiniBooNE excess\, the (g-2) of the muon\, and other low-en ergy experimental anomalies\, and present a new idea to search for such pa rticles at NA62 in K --> mu e+e-nu channels.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Mariam Tortola (Valencia) DTSTART:20200608T160000Z DTEND:20200608T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/2 DESCRIPTION:Title: How robust are the recent CP violation measurements? \nby Mariam Tortola (Valencia) as part of Brookhaven Neutrino Theory Virtu al Seminar\n\n\nAbstract\nThe search for CP violation in the neutrino sect or is one of the main goals of current and future neutrino oscillation exp eriments. The first hints for a non-zero CP-violating phase appeared in gl obal fits to neutrino oscillation data\, but only after combining the resu lts from all experiments\, since none of them was disfavoring CP conservat ion on its own. Recently\, however\, the T2K collaboration reported the ob servation of CP violation at approximately 3σ. In this talk\, we will rev iew the recent T2K results in a more general scenario where CPT is not ass umed to be conserved. We will show that\, even after combining with NOvA o r reactor experiments\, the measurement of the CP phase at the level repor ted by T2K or global neutrino fits is not robust against the CPT-violating hypothesis. We will also present updated bounds on CPT violation in the n eutrino sector.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Shirley Li (SLAC) DTSTART:20200615T160000Z DTEND:20200615T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/3 DESCRIPTION:Title: Neutrino-Nucleus Cross Sections Explained\nby Shirle y Li (SLAC) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbs tract\nThis talk is aimed to provide an introduction to the GeV neutrino-n ucleus cross section problem. I will describe how cross section calculatio ns impact experimental measurements\, why the calculations are challenging \, and where we stand now.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Cecilia Lunardini (Arizona State) DTSTART:20200706T160000Z DTEND:20200706T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/4 DESCRIPTION:Title: Supernova neutrinos: beyond the basics\nby Cecilia L unardini (Arizona State) as part of Brookhaven Neutrino Theory Virtual Sem inar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Laurie Walk (Niels Bohr International Academy) DTSTART:20200713T160000Z DTEND:20200713T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/5 DESCRIPTION:Title: Understanding the dynamics of core-collapse supernovae t hrough neutrinos\nby Laurie Walk (Niels Bohr International Academy) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nNeutrin os are perhaps the most essential messengers of core-collapse supernovae. These energetic stellar explosions are amongst the brightest objects in th e night sky\, and yet\, our understanding of them remains limited. Neutrin os are abundantly produced deep inside the core of core-collapse supernova e and are thought to play an important role in the delayed neutrino-driven explosion mechanism\; the process in which the shock wave stalls within t he iron core\, and is revived through neutrino heating. Closely mirroring the hydrodynamics of the explosion\, neutrinos carry information as they p ropagate to Earth. In this talk I will focus on how we can use state-of-th e-art 3D simulations of core-collapse supernovae to identify unique signat ures of hydrodynamical instabilities in the predicted neutrino signal\, co nstrain the properties of a progenitor before the onset of the explosion\, as well as characterise its final compact remnant.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Manibrata Sen (UC Brekeley) DTSTART:20200720T160000Z DTEND:20200720T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/6 DESCRIPTION:Title: Probing Nu physics with supernova neutrinos\nby Mani brata Sen (UC Brekeley) as part of Brookhaven Neutrino Theory Virtual Semi nar\n\n\nAbstract\nDuring a core-collapse supernova (SN)\, a large number of neutrinos are emitted\, carrying away a major fraction of the binding e nergy of the star. These neutrinos are the only way to probe the dense con ditions existing within a dying star. Deep within the stellar interior\, n eutrino density is so large that neutrino self-interactions start becoming important\, leading to "collective flavor oscillations"\, with fascinatin g consequences for the spectra measured at the Earth. A future galactic SN would also allow us to probe fundamental neutrino properties like decay\, non-standard neutrino interactions\, and so on. In this talk\, I would li ke to discuss some of these aspects\, and highlight how a galactic SN coul d act as the ultimate laboratory to probe some of the fundamental neutrino properties.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Anna Suliga (Niels Bohr International Academy) DTSTART:20200727T160000Z DTEND:20200727T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/7 DESCRIPTION:Title: The impact of keV sterile neutrinos on core-collapse sup ernovae\nby Anna Suliga (Niels Bohr International Academy) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nActive neutrinos carry most of the stellar binding energy during the supernova core collap se. If sterile neutrinos exist\, they mix with active flavors and can esca pe the collapsing star carrying away a fraction of that energy. This could lead to a much faster proto-neutron star cooling than the one explaining the observed duration of the neutrino signal from SN 1987A. We have found that the inclusion of the dynamical feedback\, which is the change imposed on the supernova background by the sterile neutrino conversions\, can lea d to the growth of the tau neutrino asymmetry ($\\nu_\\tau$-$\\nu_s$) and change the electron and the electron neutrino fraction ($\\nu_e$-$\\nu_s$) . The new treatment of active-sterile neutrino mixing in supernovae challe nges sterile neutrino bounds and leaves the sterile neutrino mass-mixing a ngle parameter space\, relevant for dark matter searches\, unconstrained.\ n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Ningqiang Song (Queen's University) DTSTART:20200817T160000Z DTEND:20200817T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/8 DESCRIPTION:Title: Microscopic black holes in neutrino telescopes\, collide rs and cosmology\nby Ningqiang Song (Queen's University) as part of Br ookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nIf the length scal e of possible extra dimensions is large enough\, the fundamental Planck sc ale is lowered such that microscopic black holes could be produced in coll isions of high-energy particles\, which opens up a plethora of novel pheno mena in terrestrial detectors and in the early Universe. Microscopic black holes from high-energy cosmic neutrino-nucleon collisions are characteriz ed by unique topologies\, distinct energy distributions and unusual ratios of hadronic-to-electronic energy deposition\, visible through Cherenkov l ight echos due to delayed neutron recombination in IceCube-like detectors. In addition\, these black holes evaporate through the emission of all par ticles that are kinematically and thermally allowed\, including dark matte r. This enables us to study the properties of dark sector from the missing momentum signatures at the next generation of colliders\, regardless of t he strength of the coupling between dark matter and the Standard Model. Th e microscopic black holes may account for part or all the dark matter reli c density today and leave imprints on CMB\, BBN and gamma ray background. Cosmological observations can serve as powerful tools to constrain the fun damental scale and the reheating temperature in the early universe.\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Noemi Rocco (FNAL) DTSTART:20200831T160000Z DTEND:20200831T170000Z DTSTAMP:20260404T100021Z UID:BrookhavenNeutrino/9 DESCRIPTION:by Noemi Rocco (FNAL) as part of Brookhaven Neutrino Theory Vi rtual Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BrookhavenNeutrino/9/ END:VEVENT END:VCALENDAR