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PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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TZID:America/Los_Angeles
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TZOFFSETFROM:-0800
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TZNAME:PDT
DTSTART:20180311T100000
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DTSTART:20181104T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180403T160000
DTEND;TZID=America/Los_Angeles:20180403T170000
DTSTAMP:20260413T210829
CREATED:20180320T135609Z
LAST-MODIFIED:20180320T135609Z
UID:765-1522771200-1522774800@rpm.physics.lbl.gov
SUMMARY:Brice Menard (JHU) and Ting-Wen Lan (IPMU)  - Twenty years of SDSS spectra: lessons for DESI
DESCRIPTION:We have played with SDSS spectra for almost two decades and enjoyed performing all sorts of statistical analyses with them. In this talk we will take a critical look at these explorations and discuss what has worked well and what has not\, what mistakes were made and some of the fundamental limits arising from the calibration of the data — all of which are informative to prepare ourselves for the DESI era. Finally we will also discuss new data analysis ideas and emerging techniques that are likely to impact the way we think and manipulate spectra in the near future.
URL:https://rpm.physics.lbl.gov/event/brice-menard-jhu-and-ting-wen-lan-ipmu-twenty-years-of-sdss-spectra-lessons-for-desi/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180405T160000
DTEND;TZID=America/Los_Angeles:20180405T170000
DTSTAMP:20260413T210829
CREATED:20180329T134647Z
LAST-MODIFIED:20180329T134647Z
UID:778-1522944000-1522947600@rpm.physics.lbl.gov
SUMMARY:Colin Hill (IAS) - "Fundamental Physics from the Foreground-Obscured Microwave Sky: Inflation\, Neutrino Masses\, and Beyond"
DESCRIPTION:The cosmic microwave background (CMB) remains a key source from which to extract information about fundamental physics\, due to its clean\, well-understood origin and immense constraining power on many types of new physics. The next decade of CMB observations will yield answers to at least two fundamental questions: (1) did large-field inflation source the initial density perturbations in our universe? (2) what is the absolute mass scale of the neutrinos? In this talk\, I will explain the routes by which these answers will be obtained. Both rely on highly precise measurements of the polarization of the CMB\, which can be used to search for the signature of primordial gravitational waves (answering the first question) and to measure the growth of cosmic structure via gravitational lensing (answering the second question). Moreover\, I will describe new methods with which to overcome the most significant challenge to this program: emission from non-primordial foreground sources. I will highlight the major role that the Simons Observatory and CMB-Stage IV experiments will play in these exciting developments. Finally\, I will describe additional unique information about the distribution and properties of baryons and dark matter that these measurements will yield\, providing crucial feedback for cosmological analyses with DESI and other large-scale structure surveys.
URL:https://rpm.physics.lbl.gov/event/colin-hill-ias-fundamental-physics-from-the-foreground-obscured-microwave-sky-inflation-neutrino-masses-and-beyond/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180412T160000
DTEND;TZID=America/Los_Angeles:20180412T170000
DTSTAMP:20260413T210829
CREATED:20180409T141937Z
LAST-MODIFIED:20180409T141937Z
UID:817-1523548800-1523552400@rpm.physics.lbl.gov
SUMMARY:George Smoot (UCB/LBNL) "Reinterpreting Low Frequency LIGO/Virgo Events as Gravitationally-Lensed Magnified Stellar-Mass Black Hole Mergers at Cosmological Distances"
DESCRIPTION:Abstract:  \nThough dismissed by most\, we claim that strong gravitational lensing of the gravitational waves for merging black holes explains the high mass binary black hole mergers observed by LIGO/Virgo explains the apparent 30 M_Sun events better than any alternative models.\nIt turns out to be difficult to make large mass black hole binaries in sufficient number to explain LIGO’s results. However\, strong gravitational lensing of cosmological distant mergers can naturally explain them while the redshift of the orbital frequencies amplifies the observed apparent masses.
URL:https://rpm.physics.lbl.gov/event/george-smoot-ucb-lbnl-reinterpreting-low-frequency-ligo-virgo-events-as-gravitationally-lensed-magnified-stellar-mass-black-hole-mergers-at-cosmological-distances/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180419T160000
DTEND;TZID=America/Los_Angeles:20180419T170000
DTSTAMP:20260413T210829
CREATED:20180329T134537Z
LAST-MODIFIED:20180329T134537Z
UID:780-1524153600-1524157200@rpm.physics.lbl.gov
SUMMARY:Paolo Calafiura (LBNL) HL-LHC Computing Challenges
DESCRIPTION:The current models for HL-LHC computing show order-of-magnitude resource shortages with large uncertainties. Business-as-usual is not an option unless we accept limiting HL-LHC physics reach\, particularly for precision studies.\nA  grassroots initiative called the HEP Software Foundation has been collecting ideas and pooling efforts to perform the necessary R&D to meet these O($100M) resource shortages. HSF produced a Community White Paper that has been endorsed by the LHC experiments\, the Worldwide LHC Computing Grid\, and some funding agencies.\n I will briefly review some of the technical and organizational challenges ahead of us as we turn the Community White Paper into a research program\, and try to present some of the exciting new R&D ideas we are prototyping at Berkeley Lab and elsewhere.
URL:https://rpm.physics.lbl.gov/event/paolo-calafiura-lbnl/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20180426T160000
DTEND;TZID=America/Los_Angeles:20180426T170000
DTSTAMP:20260413T210829
CREATED:20180402T095622Z
LAST-MODIFIED:20180402T095622Z
UID:785-1524758400-1524762000@rpm.physics.lbl.gov
SUMMARY:Gustavo Branco (CFTP-IST\, Univ. de Lisboa\, Portugal) - "Multi-Higgs Models\, The Flavor Problem and the Origin of CP Violation"
DESCRIPTION:We analyse two-Higgs-Doublet extensions of the Standard Model\, paying special attention\nto novel mechanisms for natural suppression of scalar Flavor-Changing-Neutral-Currents\nand their imllementation in specific models. Some of the most salient implications of these models will be presented. The possibility of having realistic models of spontaneous CP violation will be studied.
URL:https://rpm.physics.lbl.gov/event/gustavo-branco-cftp-ist-univ-de-lisboa-portugal-multi-higgs-models-the-flavor-problem-and-the-origin-of-cp-violation/
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