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DTSTART;TZID=UTC:20200721T120000
DTEND;TZID=UTC:20200721T130000
DTSTAMP:20260420T172503
CREATED:20200708T173226Z
LAST-MODIFIED:20200709T152441Z
UID:1501-1595332800-1595336400@rpm.physics.lbl.gov
SUMMARY:Josh McFayden (LBNL) "Unravelling LEP-Era Lepton Flavour Universality Discrepancy with ATLAS"
DESCRIPTION:Abstract:  \n\nA remarkable feature of the Standard Model (SM) is that each lepton flavour (electron\, muon\, tau) is equally likely to interact with a W boson. This is known as Lepton Flavour Universality. \n\n\nIn a recent ATLAS measurement\, a novel technique using events with top-quark pairs has been exploited to test the ratio of the probabilities for tau leptons and muons to be produced in W boson decays\, R(τ/μ). \n\n\nIn the SM\, R(τ/μ) is expected to be unity\, but a longstanding tension with this prediction has existed since the LEP era\, where\, from a combination of experiments\, R(τ/μ) was measured to be 2.7σ higher than the SM expectation. \n\nIf the LEP result were confirmed to O(1%) precision it would correspond to an unambiguous discovery of beyond the SM physics. This latest ATLAS measurement obtains this level a precision – please join the RPM to discover whether or not it agrees with LEP!\n\n\n\n\nhttp://physics.lbl.gov/rpm/index.php/events/ \nIf you are looking to confirm if there is an event\, due to room reservation\, please go to RPM website for a list of all scheduled talks.\n──────────\nTroy Cortez is inviting you to a scheduled Zoom meeting. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95906405235 \nMeeting ID: 959 0640 5235\nOne tap mobile\n+16699006833\,\,95906405235# US (San Jose)\n+13462487799\,\,95906405235# US (Houston) \nDial by your location\n+1 669 900 6833 US (San Jose)\n+1 346 248 7799 US (Houston)\n+1 253 215 8782 US (Tacoma)\n+1 301 715 8592 US (Germantown)\n+1 312 626 6799 US (Chicago)\n+1 646 558 8656 US (New York)\nMeeting ID: 959 0640 5235\nFind your local number: https://lbnl.zoom.us/u/a9dnGtb5T \nJoin by SIP\n95906405235@zoomcrc.com \nJoin by H.323\n162.255.37.11 (US West)\n162.255.36.11 (US East)\n115.114.131.7 (India Mumbai)\n115.114.115.7 (India Hyderabad)\n213.19.144.110 (EMEA)\n103.122.166.55 (Australia)\n64.211.144.160 (Brazil)\n69.174.57.160 (Canada)\n207.226.132.110 (Japan)\nMeeting ID: 959 0640 5235 \n──────────
URL:https://rpm.physics.lbl.gov/event/josh-mcfayden-cern-unravelling-lep-era-lepton-flavour-universality-discrepancy-with-atlas/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
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