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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
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X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART;TZID=America/Los_Angeles:20161115T140000
DTEND;TZID=America/Los_Angeles:20161115T150000
DTSTAMP:20260424T001624
CREATED:20161114T084809Z
LAST-MODIFIED:20161114T084809Z
UID:385-1479218400-1479222000@rpm.physics.lbl.gov
SUMMARY:Erez Etzion (Tel-Aviv U.) "Higgs hunting episode II - Searches for Beyond the SM Higgs at the LHC"
DESCRIPTION:ABSTRACT\nThe discovery of the “Higgs like” particle in summer 2012 completed about fifty years of search. In short time with significantly more data we renamed it to be the Higgs particle and continued with studying its characteristic. In parallel to the precision measurements it increased the effort to look for additional Higgs like particles and Higgs related extensions to the  Standard Model. I will review some of these searches with the ATLAS and CMS experiments focusing on the recent data collected by ATLAS in LHC pp collisions at centre of mass of 13 TeV.
URL:https://rpm.physics.lbl.gov/event/erez-etzion-tel-aviv-u-higgs-hunting-episode-ii-searches-for-beyond-the-sm-higgs-at-the-lhc/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
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DTSTART;TZID=America/Los_Angeles:20161115T160000
DTEND;TZID=America/Los_Angeles:20161115T170000
DTSTAMP:20260424T001624
CREATED:20160919T153125Z
LAST-MODIFIED:20160919T153125Z
UID:301-1479225600-1479229200@rpm.physics.lbl.gov
SUMMARY:Emmanuel Schaan (Princeton) "Non-linearities in the large-scale structure: noise and signal"
DESCRIPTION:Abstract:  \nThe primordial density perturbations seen in the cosmic microwave background have collapsed under gravity to form the large-scale structure we see in the universe today. This evolution is non-linear\, and therefore introduces coupling between Fourier modes that would otherwise be independent. I will present two consequences of this non-linear coupling.\nHalo sample variance (arXiv:1406.3330):\nGaussian estimates for the errors in large-scale structure measurements exaggerate the scientific impact of these measurements. Non-linear evolution and finite volume effects are both significant sources of non-Gaussian covariance\, which reduce the ability of power spectrum measurements to constrain cosmological parameters. I will present a joint likelihood for cluster counts\, power spectrum and bispectrum\, including the non-Gaussian covariances\, and show that a joint analysis of these observables can reduce this “information loss”. In some cases\, the resulting improvement on cosmological parameters is equivalent to doubling the survey area.\nLyman-alpha – CMB lensing bispectrum (arXiv:1607.03625): \nThe Lyman-alpha forest seen in the spectra of quasars is a powerful tool for constraining warm dark matter models and the neutrino masses\, as well as properties of the intergalactic medium. Its use as a cosmological probe relies on modeling the connection between neutral gas and dark matter. I will present the first detection of the correlation between the Lyman-alpha forest and the cosmic microwave background\, using data from BOSS and Planck. This signal quantifies the non-linear response of the neutral hydrogen to a large-scale overdensity\, and thus tests our understanding of the connection between neutral gas and the dark matter.
URL:https://rpm.physics.lbl.gov/event/reserved-14/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
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