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DTSTART;TZID=America/Los_Angeles:20200403T120000
DTEND;TZID=America/Los_Angeles:20200403T130000
DTSTAMP:20260429T141922
CREATED:20200327T215301Z
LAST-MODIFIED:20200327T215535Z
UID:764-1585915200-1585918800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Zara Bagdasarian (UC Berkeley)
DESCRIPTION:Speaker: Zara Bagdasarian (UC Berkeley)\n\n\n\nTitle: Borexino. Sun. Earth. Neutrinos\n\n\nAbstract: \nBorexino experiment is a 280-ton liquid scintillator detector located at a 3800 m w.e. depth in the Laboratori Nazionali del Gran Sasso (Italy). In more than 12 years of data taking\, Borexino has demonstrated how its unprecedented radio-purity led to exploring a wide range of neutrino physics questions in previously poorly explored low energy range.\n\n\n\n\n\n\n\n\n\n\n\n\nIn 2018-2020\, Borexino published a comprehensive study of pp-chain solar neutrinos\, which sets new milestones in the solar neutrino measurement precision. These neutrinos are the products of the pp-chain of nuclear fusion reactions generating more than 99% of the Sun’s energy. We use the gathered data as a two-fold tool to explore both neutrino and solar physics questions.\n\n\n\n\n\n\n\n\nMoreover\, Borexino is one of only two detectors in the world who have measured geoneutrinos. The results\, published in 2020\, feature increased statistics and the new elaborate analysis. With this update\, we have now been able to access 53 geoneutrino events – almost twice as many as in the result published by the collaboration in 2015. The geological interpretations of this measurement will also be discussed in the talk.\n\n\n\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/812787340\n\nMeeting ID: 812 787 340
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-zara-bagdasarian-uc-berkeley/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200410T120000
DTEND;TZID=America/Los_Angeles:20200410T130000
DTSTAMP:20260429T141922
CREATED:20200406T212010Z
LAST-MODIFIED:20200410T114706Z
UID:773-1586520000-1586523600@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Nicholas Rodd (LBNL) - URL and Meeting ID Revision
DESCRIPTION:Speaker: Nicholas Rodd (LBNL) \n  \nTitle: Evidence the 3.5 keV line is not from dark matter decay \nAbstract: \nX-ray observations of nearby clusters and galaxies have reported an unexpected X-ray line around 3.5 keV. This line has received significant attention due to its possible explanation through decaying dark matter; in particular\, decaying sterile neutrino models\, with a sterile neutrino mass around 7 keV\, provide a good fit to the available data. We use over 30 Ms of XMM-Newton blank-sky observations to search for evidence of the 3.5 keV line consistent with arising from decaying dark matter within the ambient halo of the Milky Way. We find the strongest limits to-date on the lifetime of dark matter in this mass range\, strongly disfavoring the possibility that the 3.5 keV line originates from dark matter decay. \nREVISION – URL AND MEETING ID \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/993531175\nMeeting ID: 993 531 175
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-nicholas-rodd-lbnl/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200417T120000
DTEND;TZID=America/Los_Angeles:20200417T120000
DTSTAMP:20260429T141922
CREATED:20200414T180221Z
LAST-MODIFIED:20200414T180221Z
UID:784-1587124800-1587124800@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Ethan Bernard (UC Berkeley)
DESCRIPTION:Speaker: Ethan Bernard (UC Berkeley) \nTitle: The Construction of the LZ Dark Matter Detector \nAbstract: \n\nThe assembly of the LUX-ZEPLIN (LZ) dark matter detector within the Homestake mine in Lead\, South Dakota is nearing completion.  This detector features a two-phase time projection chamber containing seven tons of liquid xenon specifically instrumented to detect low-energy nuclear recoils.  The detector is nested within an active veto system\, a passive water shield\, and 1500 m of rock overburden.  Low-background construction and efficient measurement of scintillation light and ionization electrons will allow detection of hypothetical WIMP (weakly interacting massive particle) dark matter to a sensitivity at least an order of magnitude beyond present limits.  This talk will provide an overview of the design and assembly of this detector with a focus on the unique engineering challenges posed by building a low-background noble liquid experiment at such a large scale.\n\n\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/92275279117\nMeeting ID: 922 7527 9117
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-ethan-bernard-uc-berkeley/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200424T120000
DTEND;TZID=America/Los_Angeles:20200424T130000
DTSTAMP:20260429T141922
CREATED:20200417T225916Z
LAST-MODIFIED:20200420T164514Z
UID:786-1587729600-1587733200@inpa.lbl.gov
SUMMARY:VIRTUAL INPA SEMINAR – Rémi Adam (LLR/CNRS)
DESCRIPTION:Speaker: Rémi Adam (LLR/CNRS) \nTitle: Diffuse gas in galaxy clusters: on the thermal and non-thermal components \nAbstract: \nThe clusters of galaxies represent the last step of the formation of large scale structures in the Universe. They are both useful cosmological probes and unique astrophysical laboratories. The clusters grow by accretion of surrounding structures and from the merging of subclusters\, in very energetic events\, eventually forming a diffuse gas phase made of a hot thermal component\, but also leading to particle acceleration up to very high energies. After introducing the role of clusters in our understanding of the assembly of matter in the Universe\, I will discuss how we can study the diffuse gas phase across cosmic time. The presentation will highlight results based on the NIKA/NIKA2 camera at the IRAM 30m telescope\, sensitive to the thermal gas pressure via the Sunyaev-Zel’dovich effect. I will also present prospects for probing the non-thermal component in the gamma rays with the CTA observatory. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/94805534408\nMeeting ID: 948 0553 4408
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-remi-adam-llr-cnrs/
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