We continue to review all events currently planned for the next sixty days and organizers will be notified if their event must be canceled, postponed, or held remotely. Please, check back on Indico during this time for updates regarding your meeting specifics.
As DOE O 142.3A, Unclassified Foreign Visits and Assignments Program (FVA) applies not only to physical access to DOE sites, technologies, and equipment, but also information, all remote events hosted by Fermilab must comply with FVA requirements. This includes participant registration and agenda review. Please contact Melissa Ormond, FVA Manager, with any questions.

----

ZOOM meetings Lab policy: You absolutely must not post Zoom meeting IDs on any public website unless you set a password to protect the meeting/event. Of course, do not post the password on any public website, either.
For details please refer to the news article https://news.fnal.gov/2020/05/security-guidelines-for-zoom-meetings-2/ Zoom information should be either given on email request or stored on a SharePoint page behind SSO".
Do NOT post the zoom information in the field 'Venue/Location' since it will show in the weekly Calendar even if the event is protected!

----

Indico search will be reestablished in the next version upgrade of the software: https://getindico.io/roadmap/


   

This search is only for public events. Restricted events are not available.

 

5-8 October 2020
Virtual
US/Central timezone
Captions are available at https://us.ai-live.com/CaptionViewer/Join/thirdparty?sessionId=USFERM0810B . Default meeting times are in US Central Daylight Time (UTC-5). Zoom connection information has been sent to registered participants.

Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays

Not scheduled
3m
Virtual

Virtual

Speaker

Prof. David Hertzog

Description

A next-generation rare pion decay experiment motivated by several inconsistencies between SM theory and data will probe new physics at high mass scales. Using state-of-the-art instrumentation, computational resources, and high-intensity beams, two problems can be addressed with nearly the same apparatus and beamline. The first is a measurement of the charged-pion branching ratio to electrons vs. muons, $R_{e/\mu}$, which is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to a 2 parts in 10,000, which is 15 times more precise than the current experimental determination. An experiment at a comparable level of accuracy opens a large window to test lepton universality at an unprecedented level, probing mass scales up to 3000 TeV. The second measurement concentrates on the rare process of pion beta decay, $\pi^+ \rightarrow \pi^0 e^+ \nu(\gamma)$, as well as various complementary rare decays modes. An order of magnitude improvement in sensitivity will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity at the quantum loop level. We will base our design on lessons learned form the recent PIENU and PEN efforts at TRIUMF and PSI. Improved resolution, greatly increased calorimeter depth, high-speed detector and electronic response, large solid angle coverage, and complete event reconstruction are all critical to the design, including a $4\pi$ LXe calorimeter, an internal pixelated active stopping medium and electron tracker, as well as a customized beam line.

Primary frontier topic Rare Processes and Precision Measurements Frontier

Primary author

Presentation Materials

There are no materials yet.