Hi All,
Just two quick comments on (1) our next meeting and (2) metastable cosmic strings.
(1) Next meeting:
We will meet again next week on Thursday, 24 February at 3 pm UTC and talk about the following things:
a) New team members
b) Update on the implementation into Enterprise (hopefully)
c) Update from the metastable cosmic strings subgroup (Alexander, Jeremy, Kai, Vedran)
d) Any other business: Other directions in theory space you think
we should explore? More ideas on what we should include in the
analysis? Etc. etc.
(2) Metastable cosmic strings:
Check out the following two preprints, which just appeared yesterday and today:
https://arxiv.org/abs/2202.06216
https://arxiv.org/abs/2202.07386
Both papers discuss gravitational waves from metastable cosmic
strings and basically reproduce the plot in my paper from 2020.
That is, compare Fig. 5 in 2202.06216 as well as Fig. 6 in
2202.07386 with Fig. 1 in https://arxiv.org/abs/2009.10649. All
three plots show that metastable cosmic strings allows us to reach
smaller values of \gamma (values around \gamma ~ 4), which
promises to give us a better fit to the IPTA DR2 data than just
standard stable cosmic strings.
Best regards, Kai.