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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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BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20190101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20191205T160000
DTEND;TZID=UTC:20191205T170000
DTSTAMP:20260413T230237
CREATED:20191022T015940Z
LAST-MODIFIED:20191119T165434Z
UID:1264-1575561600-1575565200@rpm.physics.lbl.gov
SUMMARY:Peter Timbie (UW-Madison) "21cm Intensity Mapping: A New Cosmological Tool?"
DESCRIPTION:ABSTRACT: \nThe 21 cm line from neutral hydrogen gas has many useful properties for mapping large volumes of the cosmos. These maps will give us a view of the Universe when the first luminous objects formed through gravity – the Cosmic Dawn and the Epoch of Reionization\, and later\, the post-Reionization Universe. They may even allow us to map the epoch before these luminous objects\, the cosmic dark ages. The large volumes of these maps promise dramatic improvements in estimation of cosmological parameters. Data is flowing now from a new generation of radio telescopes optimized for this task. Unfortunately\, the main challenge for all of them is that the astrophysical radio foregrounds are ~10\,000 times brighter than the expected hydrogen signal. In this talk I will focus on current and planned efforts to use the new technique of` ‘hydrogen intensity mapping’ to make tomographic maps of the post-Reionization universe. In particular\, I will describe the first measurements from an instrument in China\, called the Tianlai (‘Cosmic Sound’) Pathfinder.
URL:https://rpm.physics.lbl.gov/event/reserved-75/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191210T160000
DTEND;TZID=UTC:20191210T170000
DTSTAMP:20260413T230237
CREATED:20191022T020012Z
LAST-MODIFIED:20191209T163920Z
UID:1266-1575993600-1575997200@rpm.physics.lbl.gov
SUMMARY:Jelle Aalbers (Stockholm U) "XENON1T: When All Other Lights Go Out"
DESCRIPTION:Abstract:\nDirect detection experiments create the most radioactively quiet spots on earth\, to reveal collisions between dark and ordinary matter. XENON1T\, the most sensitive such experiment currently\, will soon be succeeded by LZ and XENONnT. This talk highlights XENON1T’s recent light dark matter search results\, and modern analysis techniques — full online processing\, and tensorflow-based profile likelihoods — to boost the physics reach of future direct detection experiments and other rare-event searches.
URL:https://rpm.physics.lbl.gov/event/reserved-76/
LOCATION:50B-4205
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191212T160000
DTEND;TZID=UTC:20191212T170000
DTSTAMP:20260413T230237
CREATED:20191022T020036Z
LAST-MODIFIED:20191209T164108Z
UID:1268-1576166400-1576170000@rpm.physics.lbl.gov
SUMMARY:Qing Shilo Xia (Yale) "Hunting for neutrinoless double beta decay with liquid xenon detectors"
DESCRIPTION:Abstract:  \n\nLiquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. In this talk\, I will present the latest results from EXO-200\, which searched for neutrinoless double beta decay (0υββ) in Xe-136 between 2011 and 2018. I will also present a measurement of the absolute scintillation and ionization response generated by MeV energy gamma sources over a range of electric fields in EXO-200. These measurements are useful for simulating the performance of future 0υββ detectors employing LXe\, such as nEXO\, which is a next generation 0υββ experiment using Xe-136 aiming to reach a half-life sensitivity ~10^28 years. nEXO will require ultra-low radioactivity\, high-speed cabling to carry digital signals from in-LXe electronics. I will describe the development of high-bandwidth digital cable prototypes with sufficiently low radioactivity for use in the experiment. While designed specifically for nEXO\, the demonstration of radiopure high-bandwidth cabling and interconnection techniques is relevant for many next-generation rare-event searches with large channel counts and high-speed digital electronics.
URL:https://rpm.physics.lbl.gov/event/reserved-77/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191217T160000
DTEND;TZID=UTC:20191217T170000
DTSTAMP:20260413T230237
CREATED:20191022T020055Z
LAST-MODIFIED:20191210T201048Z
UID:1270-1576598400-1576602000@rpm.physics.lbl.gov
SUMMARY:Sumit Dahal (Johns Hopkins U) "The Cosmology Large Angular Scale Surveyor: Detector Design and Performance"
DESCRIPTION:Abstract: \nThe Cosmology Large Angular Scale Surveyor (CLASS) aims to characterize the primordial gravitational waves at the level of tensor-to-scalar ratio of 0.01\, and make a cosmic-variance-limited measurement of the optical depth to reionization. CLASS is an array of four telescopes that surveys 70% of the microwave sky from the Atacama Desert at 40\, 90\, 150\, and 220 GHz frequency bands. A unique combination of large sky coverage\, rapid front-end polarization modulator\, broad frequency coverage\, and background-limited detectors enables CLASS to characterize the B-mode and E-mode power spectra on both the reionization and recombination scales. The detector arrays for all four CLASS telescopes contain smooth-walled feedhorns that couple to transition-edge sensor bolometers through planar orthomode transducers fabricated on mono-crystalline silicon. In this talk\, I will give an overview of the design and performance of the CLASS detectors and provide an update on the current status of CLASS telescopes.
URL:https://rpm.physics.lbl.gov/event/reserved-78/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191219T160000
DTEND;TZID=UTC:20191219T170000
DTSTAMP:20260413T230237
CREATED:20191022T020125Z
LAST-MODIFIED:20191022T020149Z
UID:1272-1576771200-1576774800@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-79/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191224T160000
DTEND;TZID=UTC:20191224T170000
DTSTAMP:20260413T230237
CREATED:20191022T020220Z
LAST-MODIFIED:20191022T020220Z
UID:1274-1577203200-1577206800@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-80/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191226T160000
DTEND;TZID=UTC:20191226T170000
DTSTAMP:20260413T230237
CREATED:20191022T020246Z
LAST-MODIFIED:20191022T020246Z
UID:1276-1577376000-1577379600@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-81/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20191231T160000
DTEND;TZID=UTC:20191231T170000
DTSTAMP:20260413T230237
CREATED:20191022T020313Z
LAST-MODIFIED:20191022T020313Z
UID:1278-1577808000-1577811600@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-82/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200102T160000
DTEND;TZID=UTC:20200102T170000
DTSTAMP:20260413T230237
CREATED:20191022T020342Z
LAST-MODIFIED:20191022T020342Z
UID:1280-1577980800-1577984400@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-83/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200107T160000
DTEND;TZID=UTC:20200107T170000
DTSTAMP:20260413T230237
CREATED:20191022T020407Z
LAST-MODIFIED:20200107T203040Z
UID:1282-1578412800-1578416400@rpm.physics.lbl.gov
SUMMARY:Hanna Herde (Brandeis U.) "Measuring the Mass of the Higgs Boson in the Four-Lepton Final State with the ATLAS Detector"
DESCRIPTION:Abstract:\nThe Higgs boson mass determines its couplings to every other known particle – and it is a free parameter of the Standard Model of Particle Physics.  Understanding the Higgs’ connections with the rest of the universe requires measuring its mass experimentally. This talk presents the mass measurement in the four-lepton final state with the ATLAS detector using the full LHC Run 2 proton-proton dataset of 139 \fb at \sqrt{s}=13 TeV. It will particularly emphasize the role of the detector  and include a look at ATLAS’ future in the High Luminosity era  – the Phase II Inner Tracker upgrade.
URL:https://rpm.physics.lbl.gov/event/reserved-84/
LOCATION:50B-4205
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200109T160000
DTEND;TZID=UTC:20200109T170000
DTSTAMP:20260413T230237
CREATED:20191022T020430Z
LAST-MODIFIED:20191218T165746Z
UID:1284-1578585600-1578589200@rpm.physics.lbl.gov
SUMMARY:Zhi Zheng (U. Michigan) "Physics with the same-sign dilepton and multilepton events"
DESCRIPTION:Abstract:\nDespite of the discovery of a Higgs-like particle in 2012\, there are still many unanswered questions. Studying events with the same-sign dilepton and multilepton (SSML) may help to gain insight into those questions. In this presentation\, I will give an overview of physics and challenges related to the analyses of SSML events\, focusing on the three analyses I worked on\, namely\, search for beyond standard model physics\, studies of ttH and ttW production and search for four-top production with the ATLAS detector.
URL:https://rpm.physics.lbl.gov/event/reserved-85/
LOCATION:50B-4205
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200114T160000
DTEND;TZID=UTC:20200114T170000
DTSTAMP:20260413T230237
CREATED:20191022T020457Z
LAST-MODIFIED:20200106T162058Z
UID:1286-1579017600-1579021200@rpm.physics.lbl.gov
SUMMARY:Marjon Moulai (MIT) "Unstable Sterile Neutrinos in IceCube and Beyond
DESCRIPTION:Abstract:\nLong-standing anomalies in short-baseline neutrino oscillation experiments suggest the existence of a new particle: the sterile neutrino. Unlike other neutrinos\, sterile neutrinos do not interact via the weak nuclear force. Global fits to experimental data find a significant preference for a 3+1 sterile neutrino model\, which introduces a fourth\, heavier mass eigenstate\, over the Standard Model with three massive neutrinos. However\, disagreement between the preferred parameter regions in the appearance and disappearance datasets suggest that something beyond the 3+1 model is needed. In this talk\, I will address this problem in two ways: the first is a new\, unique search for sterile neutrinos\, and the second is an unstable sterile neutrino model. IceCube\, a gigaton ice-Cherenkov detector\, is uniquely sensitive to a signature of sterile neutrinos that occurs for neutrinos traversing the earth at TeV energies. I will present the new 3+1 sterile neutrino search result from IceCube using eight years of data. Then I will discuss a sterile neutrino model involving neutrino decay. I will present: the phenomenology of this model in the case of IceCube; the result of incorporating IceCube data into recent global fits; and finally\, the status of an eight-year search for unstable sterile neutrinos in IceCube.
URL:https://rpm.physics.lbl.gov/event/reserved-86/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200116T160000
DTEND;TZID=UTC:20200116T170000
DTSTAMP:20260413T230237
CREATED:20191022T020519Z
LAST-MODIFIED:20200113T165226Z
UID:1288-1579190400-1579194000@rpm.physics.lbl.gov
SUMMARY:Daniel Joseph Antrim (UCI) "It Takes Two to Lambda: A New Dilepton Channel for the Search for Higgs Boson Pairs and a Pair of New Small Wheels for the Upgrade of the ATLAS Detector at CERN"
DESCRIPTION:Abstract:  \nThe rich program of study opened up by the discovery of a 125 GeV boson in 2012 so far leads us to consider this particle to be the Higgs boson as predicted by the Standard Model (SM) of particle physics\, the particle famously responsible for providing elementary particles their masses. To be sure that this is the case\, the last-remaining fundamental parameter of the SM — the Higgs self-coupling parameter\, “\lambda” — will have to be measured and checked for consistency with SM-prediction. In the SM\, the parameter \lambda gives structure to the Higgs vacuum and is therefore fundamental to our understanding of electroweak physics and symmetry breaking that is paramount to our understanding of the Universe. Measurement of \lambda at the LHC will proceed via the study of ultra-rare pp collision events in which Higgs boson pairs (HH) are produced. If the LHC is to have a chance at making meaningful statements about \lambda\, all avenues of study of HH must be sought out. In this talk I will therefore discuss a promising brand new channel in the search for Higgs boson pairs that I have developed and introduced over the past several years using the ATLAS detector at CERN. Additionally\, with the foreseen increases in pp collision intensities over the next decades\, the ATLAS detector will have to be upgraded if the physics program is to remain successful. This is especially true if we wish to have any hope of observing HH events. With this in mind\, I will also touch upon my involvement in the on-going upgrade of the forward muon system of the ATLAS detector\, the so-called “New Small Wheel” (NSW) Upgrade\, which comprises an upgrade of over 60% of ATLAS’ muon spectrometer coverage as well as being the largest on-going upgrade of any of the LHC experiments.
URL:https://rpm.physics.lbl.gov/event/reserved-87/
LOCATION:INPA Common Room (50-5026)\, 50-5026
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200121T160000
DTEND;TZID=UTC:20200121T170000
DTSTAMP:20260413T230237
CREATED:20200113T224951Z
LAST-MODIFIED:20200114T164232Z
UID:1334-1579622400-1579626000@rpm.physics.lbl.gov
SUMMARY:Damian Goeldi (Carleton U) "Enhancing the Physics Reach of the DUNE far Detector"
DESCRIPTION:Abstract:\n\nDUNE is a planned long-baseline neutrino oscillation experiment measuring μ disappearance and e appearance in an accelerator μ beam (arXiv:1601.05471). Its primary goals are measuring CP violation in the lepton sector\, determining the ordering of the three neutrino masses\, and precision tests of the three-flavour neutrino oscillation paradigm. Furthermore\, DUNE aims to investigate proton decay\, and the neutrino flux from the core-collapse of a potential supernova within our galaxy. Finally\, it has recently been proposed (DOI:10.1103/PhysRevLett.123.131803) that an upgraded far detector design could enable DUNE to shed light on the current 2 discrepancy between reactor and solar neutrino oscillation measurements. Liquid argon time projection chambers (LArTPCs) were chosen as primary detectors for the DUNE near and far detector complexes due to their excellent tracking and calorimetry performance. The far detector complex will consist of four multi-kt detectors\, whose baseline design is of semi-monolithic nature (arXiv:1807.10327)\, segmenting each module along the drift axis into multiple TPCs. In contrast a near detector LAr component needs to be fully segmented due to the high event rates present there. This motivated the development of ArgonCube\, a fully modular TPC concept\, alleviating high-voltage requirements\, reducing optical pile-up\, and providing ambiguity-free tracking and calorimetry by means of a pixelated charge readout. While near detector development is well on track\, we have recently made the case for an ArgonCube far detector design (arXiv:1908.10956). Full segmentation would alleviate high-voltage requirements drastically. Combined with the pixelated charge readout eliminating bulky wire frames\, the sensitive volume could be increased significantly. A pixelated charge readout providing true 3D tracking free from ambiguity would simplify event reconstruction. Reconstruction efficiency would no longer depend on the incident angle of an interaction\, enhancing sensitivity to isotropic events\, such as proton decay\, solar\, and supernova neutrinos. This talk will first introduce the ArgonCube concept\, and show how it addresses the DUNE near detector challenges. I will then focus on the potential of an ArgonCube far detector to enhance DUNE’s capabilities in regards to its secondary physics goals\, as well as the changes required compared to the near detector design.
URL:https://rpm.physics.lbl.gov/event/damian-goeldi-carleton-u-enhancing-the-physics-reach-of-the-dune-far-detector/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200122T160000
DTEND;TZID=UTC:20200122T170000
DTSTAMP:20260413T230237
CREATED:20200121T225053Z
LAST-MODIFIED:20200121T225053Z
UID:1338-1579708800-1579712400@rpm.physics.lbl.gov
SUMMARY:Special RPM | Gregor Kasieczka (Hamburg U) "Faster\, Deeper\, Stronger: Machines Learn Particle Physics
DESCRIPTION:Abstract: \nMany experimental results from both particle and astrophysics hint that the Standard Model (SM) of particle physics cannot be a complete theory of Nature. However\, in its first years of operation\, the Large Hadron Collider at CERN was very successful in excluding large regions of parameter space for potential models beyond the SM. We present how deep learning can be used to search for deviations from the SM in a model independent way. Beyond searching for new physics\, we explore ways to increase the robustness and understanding of network decisions and show how generative models can speed up simulations.
URL:https://rpm.physics.lbl.gov/event/special-rpm-gregor-kasieczka-hamburg-u-faster-deeper-stronger-machines-learn-particle-physics/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200123T160000
DTEND;TZID=UTC:20200123T170000
DTSTAMP:20260413T230237
CREATED:20200303T185612Z
LAST-MODIFIED:20200303T192144Z
UID:1367-1579795200-1579798800@rpm.physics.lbl.gov
SUMMARY:Michal Zamkovsky (CERN) "New result on K+→π+vv ̅ from the NA62 experiment"
DESCRIPTION:ABSTRACT:\n \nThe decay K+→π+vv ̅\, with a very precisely predicted branching ratio of less than 10exp(-10)\, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the K+→π+vv ̅ with a decay-in-flight technique. NA62 took data so far in 2016-2018. Statistics collected in 2016 allowed NA62 to reach the Standard Model sensitivity for K+→π+vv ̅\, entering the domain of 10-10 single event sensitivity and showing the proof of principle of the experiment. Thanks to the statistics collected in 2017\, NA62 surpasses the present best sensitivity. The analysis strategy is reviewed and the preliminary result from the 2017 data set is presented. \n 
URL:https://rpm.physics.lbl.gov/event/michal-zamkovsky-cern-new-result-on-k%e2%86%92%cf%80vv-%cc%85-from-the-na62-experiment/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200128T160000
DTEND;TZID=UTC:20200128T170000
DTSTAMP:20260413T230237
CREATED:20200123T220018Z
LAST-MODIFIED:20200123T220018Z
UID:1342-1580227200-1580230800@rpm.physics.lbl.gov
SUMMARY:Vivek Singh (LBNL) "New results for Neutrinoless Double-Beta Decay search in 130Te with CUORE "
DESCRIPTION:Abstract:  \nThe CUORE experiment — with a detector array comprising 988 cube-shaped radiopure natTeO2 crystals — is the world’s largest and most sensitive low temperature calorimetric search for neutrinoless double beta (0νββ) in 130Te. We completed the construction of the experiment in August 2016 and started science data taking in Spring 2017. Since our first results from Fall 2017\, we have quadrupled our exposure and have bettered the sensitivity for the $0\nu\beta\beta$ search using analysis improvements. In this talk\, I will delve into the data taking campaign\, analysis techniques\, and discuss the recent physics results from the full CUORE datasets accumulated over the last two years. 
URL:https://rpm.physics.lbl.gov/event/vivek-singh-lbnl-new-results-for-neutrinoless-double-beta-decay-search-in-130te-with-cuore/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200130T160000
DTEND;TZID=UTC:20200130T170000
DTSTAMP:20260413T230237
CREATED:20191022T020540Z
LAST-MODIFIED:20200122T210954Z
UID:1290-1580400000-1580403600@rpm.physics.lbl.gov
SUMMARY:Huilin Qu (UCSB) "Search for the Higgs Boson Decaying to Charm Quarks with the CMS Experiment"
DESCRIPTION:Abstract: \n\n \nAfter the discovery of the Higgs boson at the LHC\, thoroughly studying the properties of the Higgs boson has become one of the top priorities of the LHC physics program. Measurement of the decay of the Higgs boson to charm quarks provides a direct probe of the Higgs coupling to second-generation quarks\, therefore it is crucial for understanding the structure of Yukawa couplings. However\, such a measurement is extremely challenging at the LHC due to large backgrounds. Recently\, a search for the Higgs boson decaying to charm quarks has been performed in the CMS experiment. Novel approaches and advanced machine learning-based techniques for the Higgs boson reconstruction and charm quark identification are adopted in this analysis\, leading to significantly improved results compared to previous experimental searches.\n\n 
URL:https://rpm.physics.lbl.gov/event/reserved-88/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200204T160000
DTEND;TZID=UTC:20200204T170000
DTSTAMP:20260413T230237
CREATED:20190909T184824Z
LAST-MODIFIED:20200127T170523Z
UID:1204-1580832000-1580835600@rpm.physics.lbl.gov
SUMMARY:Matthew Solt (Stanford U) "The Heavy Photon Search Experiment
DESCRIPTION:Abstract: \n  \nThe Heavy Photon Search (HPS) experiment is a fixed target experiment at Jefferson Lab searching for a new dark-force mediator called a heavy photon (or dark photon or A’). A heavy photon is a hypothetical U(1) vector boson that couples to the Standard Model photon through kinetic mixing\, and thus can be produced in a process analogous to bremsstrahlung by an electron beam incident on a dense target. If kinematically allowed\, subsequent decays into e+e- pairs can be detected by the HPS detector – a compact\, large acceptance spectrometer consisting of a silicon vertex tracker and lead-tungstate electromagnetic calorimeter. For large couplings\, heavy photons would appear as a resonance peak in the invariant mass spectrum on top of a large QED background. For sufficiently small couplings\, heavy photons are long-lived and would appear as decay vertices displaced from the target beyond a prompt QED background. In this talk\, I will discuss the motivation for heavy photons and the HPS detector. I will then focus on the displaced vertex analysis and discuss the results from our engineering in 2015 (1.06 GeV beam energy)\, the ongoing analysis of the engineering run in 2016 (2.3 GeV beam energy)\, and finally the upgrades and commissioning of our most recent physics run in 2019 (4.55 GeV beam energy).
URL:https://rpm.physics.lbl.gov/event/reserved-49/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200206T160000
DTEND;TZID=UTC:20200206T170000
DTSTAMP:20260413T230237
CREATED:20190909T184849Z
LAST-MODIFIED:20190920T184732Z
UID:1206-1581004800-1581008400@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-50/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200211T160000
DTEND;TZID=UTC:20200211T170000
DTSTAMP:20260413T230237
CREATED:20190909T185021Z
LAST-MODIFIED:20200205T231614Z
UID:1208-1581436800-1581440400@rpm.physics.lbl.gov
SUMMARY:Callum Wilkinson (Albert Einstein Center for Fundamental Physics) "Precision neutrino oscillation physics and DUNE "
DESCRIPTION:Abstract:  \nNeutrino oscillations have been established as an energy and distance dependent phenomena\, beyond the Standard Model of Particle Physics. However\, a number of key questions remain\, which have implications for our understanding of the origin and development of our Universe. The Deep Underground Neutrino Experiment (DUNE)\, which is currently in the planning stage\, has the potential to answer these outstanding questions and make measurements of the other parameters with unprecedented precision. This talk gives an overview of the DUNE sensitivity to oscillation parameters\, and describes a program of research aimed at reducing systematic uncertainties\, and achieving DUNE’s physics goals.
URL:https://rpm.physics.lbl.gov/event/reserved-53/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200213T160000
DTEND;TZID=UTC:20200213T170000
DTSTAMP:20260413T230237
CREATED:20190909T185034Z
LAST-MODIFIED:20200204T221236Z
UID:1210-1581609600-1581613200@rpm.physics.lbl.gov
SUMMARY:Ben Safdi (U. Michigan) "The Search for Axion Dark Matter
DESCRIPTION:Abstract: \nDark matter is the dominant source of matter in our Universe.  However\, while dark matter dictates the evolution of large-scale astrophysical systems through its gravitational effects\, the particle nature of dark matter is unknown.  In this talk I will review the current status of the search for the particle dark matter candidate called the axion\, which is both well-motivated theoretically and also relatively unexplored experimentally.  I will focus specifically on new large-scale numerical simulations of axion cosmology that lead to precise predictions for (i) the axion mass that gives the correct dark matter abundance\, and (ii) the structure of dark matter on small astrophysical scales.  I will show that axion dark matter may be harder to detect directly in the laboratory than previously thought\, given that the cosmological axions are mostly confined to compact minihalos\, but that this dark matter scenario may still be detectable using radio telescope searches for axion-induced radio lines.
URL:https://rpm.physics.lbl.gov/event/reserved-56/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200218T160000
DTEND;TZID=UTC:20200218T170000
DTSTAMP:20260413T230237
CREATED:20190909T185048Z
LAST-MODIFIED:20200218T044234Z
UID:1212-1582041600-1582045200@rpm.physics.lbl.gov
SUMMARY:Heidi Schellman (Oregon State U) "Computing for the DUNE Long Baseline Neutrino Oscillation Experiment "
DESCRIPTION:ABSTRACT: \n  \nThe DUNE long baseline neutrino oscillation collaboration consists of over 180 institutions from 33 countries. The experiment will consist of 4 10kT fiducial volume liquid argon TPC’s in South Dakota and a multi-system near detector at Fermilab. The far site in the Sanford Underground Laboratory is in preparation now with commissioning of the first 10kT fiducial volume Liquid Argon TPC expected over the period 2025-2028 and a long data taking run with 4 modules expected from 2029 and beyond. \nAn active prototyping program is already in place with a short test beam run with a 700T\, 15\,360 channel prototype of single-phase readout at the neutrino platform at CERN in late 2018 and tests of a similar sized dual-phase detector scheduled for mid-2019. The 2018 test beam run was a valuable live test of our computing model. The detector produced raw data at rates of up to ~2GB/s. These data were stored at full rate on tape at CERN and Fermilab and replicated at sites in the UK and Czech Republic. In total 1.8 PB of raw data were produced and reconstructed during the six week test beam run. \nBaseline predictions for the full DUNE detector data\, starting in the mid 2020’s are 30-60 PB of raw data per year. In contrast to traditional HEP computational problems\, DUNE’s Liquid Argon TPC data consist of simple but very large (many GB) 2D data objects which share many characteristics with astrophysical images. This presents opportunities to use advances in machine learning and pattern recognition as a frontier user of High Performance Computing facilities capable of massively parallel processing.
URL:https://rpm.physics.lbl.gov/event/reserved-59/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200220T160000
DTEND;TZID=UTC:20200220T170000
DTSTAMP:20260413T230237
CREATED:20190909T190024Z
LAST-MODIFIED:20200212T224917Z
UID:1214-1582214400-1582218000@rpm.physics.lbl.gov
SUMMARY:Simon Knapen (IAS) "Soft signals at the LHC"
DESCRIPTION:ABSTRACT:\nThe LHC is both a Higgs and B-factory\, and for both particles it will deliver the largest data set for many decades to come. I will discuss a few examples of ways we can leverage this to search for beyond the Standard Model physics. Some ideas can be implemented now\, while others rely on the phase II detector upgrades.
URL:https://rpm.physics.lbl.gov/event/reserved-60/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200225T160000
DTEND;TZID=UTC:20200225T170000
DTSTAMP:20260413T230237
CREATED:20190909T190328Z
LAST-MODIFIED:20200221T002813Z
UID:1216-1582646400-1582650000@rpm.physics.lbl.gov
SUMMARY:Raquel Castillo Fernandez (Fermilab) "Searching for Nu Physics with High Resolution Detectors"
DESCRIPTION:Abstract: \n\nNeutrino physics aims to answer some of the most pressing questions in particle physics: why the Universe is dominated by matter\, why the neutrino mass is so small and if there are more types of neutrinos. Due to the neutrino’s weakly interacting nature and the complexity of their interactions\, this research requires very large detectors able to identify low energy particles. This challenge has pushed the development of new technologies\, such as the liquid argon time projection chamber (LArTPC) detectors\, allowing for unprecedented precision in particle reconstruction\, and to expand the scientific program searching for more rare channels are present in some theories of new physics beyond the current standard model. After briefly reviewing the basis of neutrino physics\, I will introduce the main principles of the LArTPC detectors and how they can help us addressing some of the most relevant questions in particle physics. I will also describe the scientific achievements and the potential of the LArTPC neutrino program in the U.S.\, the current short (MicroBooNE/SBN) and the future long-baseline (DUNE) neutrino experiments.
URL:https://rpm.physics.lbl.gov/event/reserved-61/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200227T160000
DTEND;TZID=UTC:20200227T170000
DTSTAMP:20260413T230237
CREATED:20190909T190342Z
LAST-MODIFIED:20200220T180430Z
UID:1218-1582819200-1582822800@rpm.physics.lbl.gov
SUMMARY:Ken Van Tilburg (NYU/IAS) "The Structure of Dark Matter on Small Scales"
DESCRIPTION:ABSTRACT:\n\nHalometry—mapping out the spectrum\, location\, and kinematics of nonluminous structures inside the Galactic halo—can be realized via effects that variable weak gravitational lensing induces on the proper motions of stars and other luminous background sources. Modern astrometric surveys provide unprecedented positional precision along with a leap in the number of cataloged objects. Astrometry thus offers a new and sensitive probe of collapsed dark matter structures over a wide mass range\, from one millionth to several million solar masses. It opens up a window into the spectrum of primordial density fluctuations with very small comoving wavenumbers\, scales hitherto poorly constrained.\n\nI will outline a program of detection strategies for dark matter substructure based on time-domain weak gravitational lensing\, after summarizing existing techniques and constraints. I will present first results from analyses based on Gaia’s second data release. Finally\, I will show that minimal models of axion-like dark matter naturally produce dense small-scale structures which can probed by the aforementioned astrometric lensing techniques.
URL:https://rpm.physics.lbl.gov/event/reserved-62/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200302T160000
DTEND;TZID=UTC:20200302T170000
DTSTAMP:20260413T230237
CREATED:20200302T165012Z
LAST-MODIFIED:20200302T165400Z
UID:1363-1583164800-1583168400@rpm.physics.lbl.gov
SUMMARY:David Caratelli (Fermilab) "Neutrinos at Short Baselines: the MicroBooNE Experiment"
DESCRIPTION:Abstract: \n\nWhile neutrino oscillation physics has entered an era of precision measurements\, several anomalies in experiments at short baselines remain without a satisfactory answer.\n\nThe MicroBooNE experiment has been recording neutrino interactions on Fermilab’s Booster Neutrino Beam since 2015 employing a liquid argon TPC detector. This talk will present recent progress on MicroBooNE’s measurement of electron neutrinos aimed at addressing past anomalies observed by the MiniBooNE collaboration.\n\nFinally\, I will talk about how developments in the ability to use liquid argon TPC detectors in the sub-GeV regime can open new opportunities in neutrino and rare-event physics with Fermilab’s upcoming short- and long-baseline neutrino programs.\n 
URL:https://rpm.physics.lbl.gov/event/david-caratelli-fermilab-neutrinos-at-short-baselines-the-microboone-experiment/
LOCATION:HYBRID 50A-5132 (Sessler Conference Room)\, https://lbnl.zoom.us/j/91782268585\, 50A-5132
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200303T080000
DTEND;TZID=UTC:20200303T170000
DTSTAMP:20260413T230237
CREATED:20190909T190403Z
LAST-MODIFIED:20190909T190403Z
UID:1220-1583222400-1583254800@rpm.physics.lbl.gov
SUMMARY:Reserved
DESCRIPTION:
URL:https://rpm.physics.lbl.gov/event/reserved-63/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200303T160000
DTEND;TZID=UTC:20200303T170000
DTSTAMP:20260413T230237
CREATED:20200303T164733Z
LAST-MODIFIED:20200303T164733Z
UID:1365-1583251200-1583254800@rpm.physics.lbl.gov
SUMMARY:Richard Bonventre (LBNL) "Searching for Muon to Electron Conversion: The Mu2e Experiment at Fermilab"
DESCRIPTION:Abstract: \n \nThe Mu2e experiment will search for the charged lepton flavor violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus\, reaching a 90% C.L. limit of 8×10^-17 on the conversion rate. This sensitivity is a four-orders of magnitude improvement over previous experiments\, and allows Mu2e to probe new physics at mass scales up to 10^4 TeV\, far beyond the direct reach of colliders. Mu2e is currently under construction at Fermilab\, and expects to begin data taking in 2023. In this talk I will present the current status of the experiment. I will also discuss the development of Mu2e detector simulations as well as the results and impact of prototype data analyses.\n 
URL:https://rpm.physics.lbl.gov/event/richard-bonventre-lbnl-searching-for-muon-to-electron-conversion-the-mu2e-experiment-at-fermilab/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200305T160000
DTEND;TZID=UTC:20200305T170000
DTSTAMP:20260413T230237
CREATED:20190909T190419Z
LAST-MODIFIED:20200224T184044Z
UID:1222-1583424000-1583427600@rpm.physics.lbl.gov
SUMMARY:Tom Melia (Kavli IPMU - Japan)“ 'CMB-ing' the Search for New Physics at Colliders"
DESCRIPTION:Abstract:\n\nThe effect of dark matter and dark energy in the universe can be inferred through measurements of anisotropies in the cosmic microwave background (CMB). The quantum effect of new physics on collisions at the Large Hadron Collider can be similarly inferred through measurements of what could be considered “anisotropies” in standard model processes. But how precise can one make the analogy? For example\, does it make sense to talk of a “power spectrum of the standard model”? In this talk I will show how to construct just such a power spectrum\, via a solution to a long-standing problem in effective field theory\, and a hidden geometry in Fermi’s Golden Rule.
URL:https://rpm.physics.lbl.gov/event/reserved-64/
LOCATION:70A-3377\, 70A-3377
END:VEVENT
END:VCALENDAR