Showing items with similar title or keywords.

• Massless positivity in graviton exchange 

  Herrero-Valea, Mario; Santos-Garcia, Raquel; Tokareva, Anna (American Physical Society (APS), 2021)

  We formulate positivity bounds for scattering amplitudes including exchange of massless particles. We generalize the standard construction through dispersion relations to include the presence of a branch cut along the real ...

• Tiheä kvarkkiaine ja Nambu-Jona-Lasinio-malli 

  Karavirta, Tuomas (2007)

• The 1-loop effective potential for the Standard Model in curved spacetime 

  Markkanen, Tommi; Nurmi, Sami; Rajantie, Arttu; Stopyra, Stephen (Springer, 2018)

  The renormalisation group improved Standard Model effective potential in an arbitrary curved spacetime is computed to one loop order in perturbation theory. The loop corrections are computed in the ultraviolet limit, which ...

• Clustering and Structural Robustness in Causal Diagrams 

  Tikka, Santtu; Helske, Jouni; Karvanen, Juha (JMLR, 2023)

  Graphs are commonly used to represent and visualize causal relations. For a small number of variables, this approach provides a succinct and clear view of the scenario at hand. As the number of variables under study ...

• Radio signatures from encounters between neutron stars and QCD-axion minihalos around primordial black holes 

  Nurmi, Sami; Schiappacasse, Enrico D.; Yanagida, Tsutomu T. (IOP Publishing, 2021)

  Probing the QCD axion dark matter (DM) hypothesis is extremely challenging as the axion interacts very weakly with Standard Model particles. We propose a new avenue to test the QCD axion DM via transient radio signatures ...