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PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
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X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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X-Robots-Tag:noindex
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TZID:UTC
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TZOFFSETFROM:+0000
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DTSTART:20200101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20200102T160000
DTEND;TZID=UTC:20200102T170000
DTSTAMP:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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:20260417T023340
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
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