Tootfinder

A note on the Nielsen realization problem for Enriques manifolds
Simone Billi
https://arxiv.org/abs/2508.02893 https://arxiv.org/pdf/2508.02893

A note on the Nielsen realization problem for Enriques manifolds
We give a numerical criterion for the Nielsen realization problem for Enriques manifolds, based on the recent developments on the Birman-Hilden theory for hyper-Kähler manifolds and on Nielsen realization for hyper-Kähler manifolds. We apply the criterion to known examples of Enriques manifolds to get explicit groups that can be realized or not realized, and comment on questions related to the Nielsen realization problem.

Effective description of Nelson-Barr models and the theta parameter
Gustavo H. S. Alves, Celso C. Nishi
https://arxiv.org/abs/2506.03257 https://

Effective description of Nelson-Barr models and the theta parameter
Nelson-Barr theories solve the strong CP problem with CP spontaneously broken at Λ_{CP} and transmitted to the CP conserving version of the SM through vector-like quarks (VLQs). For an arbitrary number of CP breaking scalars and VLQs, we perform the full one-loop matching calculations at Λ_{CP} up to dimension five operators and the relevant matching calculations at the VLQ scale relevant to tracking the contributions to the parameter \barθ. In the EFT after the CP breaking scalars have been…

ey leude...
ihr wisst gar nicht was da noch auf uns zu kommt

Riding the rails

"Block-Beben" im Mopo-Ticker, "Blockbuster" war doch naheliegend!!11

Plex asked me again tonight

Feeling wistful for an old lover, someone I didn't appreciate enough how good he was for me.

Plex has tried to trick me twice in the last month into agreeing to the abusive data sharing agreement that I first refused in March.

so much depends
upon
an ethernet
cable
with its delicate
threads
and fragile
connectors

I've really been moved by Edward White's death and the tributes to him being written. His books have meant a lot to me as a gay man. I wrote a blog post with more links, many also shared on @…