BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
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
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20240101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20241203T160000
DTEND;TZID=UTC:20241203T170000
DTSTAMP:20260525T114648
CREATED:20241126T225315Z
LAST-MODIFIED:20241126T225316Z
UID:2705-1733241600-1733245200@rpm.physics.lbl.gov
SUMMARY:Speaker: Simon Koch (Oxford) - Title: Measurements with ATLAS\, Measurements of ATLAS: A search for leptoquarks in a final state with two tau leptons\, and material measurements of the ITk Pixel detector
DESCRIPTION:Research Progress Meeting \nDate: December 3\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Simon Koch (Oxford) \nTitle: Measurements with ATLAS\, Measurements of ATLAS: A search for leptoquarks in a final state with two tau leptons\, and material measurements of the ITk Pixel detector \nAbstract: The ATLAS detector at the LHC has enjoyed great success so far\, spanning both new discoveries and precision measurements\, and tests of a vast array of theoretical models. This seminar will begin with an introduction to the ATLAS high-mass Drell-Yan di-tau measurement and in particular the search for leptoquarks in this decay channel\, including the analysis design and expected results. The search was originally motivated by hints toward lepton-flavour-universality violating behaviour at LHCb\, and the leptoquark models explored couple the lepton and quark sectors of the standard model via a new vector or scalar boson. This also introduces unique properties and challenges to the analysis\, such as the impact of negative interference with the standard model cross-section. \nThe future should bring an even greater physics reach thanks to the larger datasets that will be made possible by the High-Luminosity LHC and the ATLAS Inner Tracker (ITk) upgrade. The tracking and vertexing performance of the ITk is critical for future analyses\, and hence factors influencing detector performance must be validated so they can be correctly implemented in our Monte-Carlo simulations. One important aspect is the material content of the detector\, which has a substantial impact on b-tagging and vertexing resolution due to multiple scattering and hadronic interactions\, and is generally only verified using detector data post-commissioning. The second part of this seminar will explore a series of testbeam measurements utilising multiple scattering of low-energy positrons to measure 2D maps of the fractional radiation length x/X₀ of detector components to sub-mm resolution during the R&D phase. A measurement of an ITkPix quad module will be presented\, and an outlook will be given on the feasibility of measuring large areas quickly and efficiently with such a technique.\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-simon-koch-oxford-title-measurements-with-atlas-measurements-of-atlas-a-search-for-leptoquarks-in-a-final-state-with-two-tau-leptons-and-material-measurements-of-the-itk-pixel-detecto/
END:VEVENT
END:VCALENDAR