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:20260422T230719Z UID:BrookhavenNeutrino/1 DESCRIPTION:Title: Dark neutrino sectors and low energy experiments\nby Matheu s Hostert (University of Minnesota) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nI will present a simple and minimal three-p ortal model for neutrino masses with a hidden U(1)' symmetry based on low- scale variants of the seesaw mechanism. In our model\, the heavy neutral l eptons have large hidden interactions\, and through kinetic and scalar mix ing\, can lead to significantly different experimental signatures from 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-energy ex perimental anomalies\, and present a new idea to search for such particles at NA62 in K --> mu e+e-nu channels.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Mariam Tortola (Valencia) DTSTART:20200608T160000Z DTEND:20200608T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/2 DESCRIPTION:Title: How robust are the recent CP violation measurements?\nby Ma riam Tortola (Valencia) as part of Brookhaven Neutrino Theory Virtual Semi nar\n\n\nAbstract\nThe search for CP violation in the neutrino sector is o ne of the main goals of current and future neutrino oscillation experiment s. The first hints for a non-zero CP-violating phase appeared in global fi ts to neutrino oscillation data\, but only after combining the results fro m all experiments\, since none of them was disfavoring CP conservation on its own. Recently\, however\, the T2K collaboration reported the observati on of CP violation at approximately 3σ. In this talk\, we will review the recent T2K results in a more general scenario where CPT is not assumed to be conserved. We will show that\, even after combining with NOvA or react or experiments\, the measurement of the CP phase at the level reported by T2K or global neutrino fits is not robust against the CPT-violating hypoth esis. We will also present updated bounds on CPT violation in the neutrino sector.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Shirley Li (SLAC) DTSTART:20200615T160000Z DTEND:20200615T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/3 DESCRIPTION:Title: Neutrino-Nucleus Cross Sections Explained\nby Shirley Li (S LAC) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\n This talk is aimed to provide an introduction to the GeV neutrino-nucleus cross section problem. I will describe how cross section calculations impa ct experimental measurements\, why the calculations are challenging\, and where we stand now.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Cecilia Lunardini (Arizona State) DTSTART:20200706T160000Z DTEND:20200706T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/4 DESCRIPTION:Title: Supernova neutrinos: beyond the basics\nby Cecilia Lunardin i (Arizona State) as part of Brookhaven Neutrino Theory Virtual Seminar\n\ nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Laurie Walk (Niels Bohr International Academy) DTSTART:20200713T160000Z DTEND:20200713T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/5 DESCRIPTION:Title: Understanding the dynamics of core-collapse supernovae through neutrinos\nby Laurie Walk (Niels Bohr International Academy) as part o f Brookhaven Neutrino Theory Virtual Seminar\n\n\nAbstract\nNeutrinos are perhaps the most essential messengers of core-collapse supernovae. These e nergetic stellar explosions are amongst the brightest objects in the night sky\, and yet\, our understanding of them remains limited. Neutrinos are abundantly produced deep inside the core of core-collapse supernovae and a re thought to play an important role in the delayed neutrino-driven explos ion mechanism\; the process in which the shock wave stalls within the iron core\, and is revived through neutrino heating. Closely mirroring the hyd rodynamics of the explosion\, neutrinos carry information as they propagat e to Earth. In this talk I will focus on how we can use state-of-the-art 3 D simulations of core-collapse supernovae to identify unique signatures of hydrodynamical instabilities in the predicted neutrino signal\, constrain the properties of a progenitor before the onset of the explosion\, as wel l as characterise its final compact remnant.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Manibrata Sen (UC Brekeley) DTSTART:20200720T160000Z DTEND:20200720T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/6 DESCRIPTION:Title: Probing Nu physics with supernova neutrinos\nby Manibrata S en (UC Brekeley) as part of Brookhaven Neutrino Theory Virtual Seminar\n\n \nAbstract\nDuring a core-collapse supernova (SN)\, a large number of neut rinos are emitted\, carrying away a major fraction of the binding energy o f the star. These neutrinos are the only way to probe the dense conditions existing within a dying star. Deep within the stellar interior\, neutrino density is so large that neutrino self-interactions start becoming import ant\, leading to "collective flavor oscillations"\, with fascinating conse quences for the spectra measured at the Earth. A future galactic SN would also allow us to probe fundamental neutrino properties like decay\, non-st andard neutrino interactions\, and so on. In this talk\, I would like to d iscuss some of these aspects\, and highlight how a galactic SN could act a s the ultimate laboratory to probe some of the fundamental neutrino proper ties.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Anna Suliga (Niels Bohr International Academy) DTSTART:20200727T160000Z DTEND:20200727T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/7 DESCRIPTION:Title: The impact of keV sterile neutrinos on core-collapse supernovae \nby Anna Suliga (Niels Bohr International Academy) as part of Brookha ven Neutrino Theory Virtual Seminar\n\n\nAbstract\nActive neutrinos carry most of the stellar binding energy during the supernova core collapse. If sterile neutrinos exist\, they mix with active flavors and can escape the collapsing star carrying away a fraction of that energy. This could lead t o a much faster proto-neutron star cooling than the one explaining the obs erved duration of the neutrino signal from SN 1987A. We have found that th e inclusion of the dynamical feedback\, which is the change imposed on the supernova background by the sterile neutrino conversions\, can lead to th e growth of the tau neutrino asymmetry ($\\nu_\\tau$-$\\nu_s$) and change the electron and the electron neutrino fraction ($\\nu_e$-$\\nu_s$). The n ew treatment of active-sterile neutrino mixing in supernovae challenges st erile neutrino bounds and leaves the sterile neutrino mass-mixing angle pa rameter space\, relevant for dark matter searches\, unconstrained.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Ningqiang Song (Queen's University) DTSTART:20200817T160000Z DTEND:20200817T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/8 DESCRIPTION:Title: Microscopic black holes in neutrino telescopes\, colliders and cosmology\nby Ningqiang Song (Queen's University) as part of Brookhave n Neutrino Theory Virtual Seminar\n\n\nAbstract\nIf the length scale of po ssible extra dimensions is large enough\, the fundamental Planck scale is lowered such that microscopic black holes could be produced in collisions of high-energy particles\, which opens up a plethora of novel phenomena in terrestrial detectors and in the early Universe. Microscopic black holes from high-energy cosmic neutrino-nucleon collisions are characterized by u nique topologies\, distinct energy distributions and unusual ratios of had ronic-to-electronic energy deposition\, visible through Cherenkov light ec hos due to delayed neutron recombination in IceCube-like detectors. In add ition\, these black holes evaporate through the emission of all particles that are kinematically and thermally allowed\, including dark matter. This enables us to study the properties of dark sector from the missing moment um signatures at the next generation of colliders\, regardless of the stre ngth of the coupling between dark matter and the Standard Model. The micro scopic black holes may account for part or all the dark matter relic densi ty today and leave imprints on CMB\, BBN and gamma ray background. Cosmolo gical observations can serve as powerful tools to constrain the fundamenta l scale and the reheating temperature in the early universe.\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Noemi Rocco (FNAL) DTSTART:20200831T160000Z DTEND:20200831T170000Z DTSTAMP:20260422T230719Z UID:BrookhavenNeutrino/9 DESCRIPTION:by Noemi Rocco (FNAL) as part of Brookhaven Neutrino Theory Vi rtual Seminar\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/BrookhavenNeutrino/9/ END:VEVENT END:VCALENDAR