[Isac-journal-club] Journal Club, 8 Nov 2017

[Melissa Anholm]

Hey all, 

The paper for next week's journal club is titled "Measurement of the neutron lifetime using an asymmetric magneto-gravitational trap and in situ detection", and is attached.  It can also be found here:  https://arxiv.org/abs/1707.01817 .  The paper details a major result from the UCNtau collaboration, so it will surely be published somewhere real pretty soon.  


Questions for reading and/or discussion:  

* What are "quasi-trapped" neutrons, and why is it important to avoid them?
* Why use both a magnetic Halbach array and an additional magnetic holding field?
* Why pair the runs up into sets of long and short runs?
* Is this result good enough to extract any further constraints on cosmological or BSM physics?  
* Does this result actually resolve the long held discrepancy between neutron lifetime measurement techniques?


Cheers, 
- Melissa

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.triumf.ca/pipermail/isac-journal-club/attachments/20171104/c402d608/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: JC_2017Nov8_1707.01817.pdf
Type: application/download
Size: 676511 bytes
Desc: not available
URL: <http://lists.triumf.ca/pipermail/isac-journal-club/attachments/20171104/c402d608/attachment-0001.bin>