Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Lucas Johns"'
Autor:
Zewei Xiong, Meng-Ru Wu, Gabriel Martínez-Pinedo, Tobias Fischer, Manu George, Chun-Yu Lin, Lucas Johns
We implement a multi-group and discrete-ordinate neutrino transport model in spherical symmetry which allows to simulate collective neutrino oscillations by including realistic collisional rates in a self-consistent way. We utilize this innovative mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2142525af5a25dfa97f36d91cf3f6a5b
http://arxiv.org/abs/2210.08254
http://arxiv.org/abs/2210.08254
Autor:
Lucas Johns, Hiroki Nagakura
Publikováno v:
Physical Review
Several recent numerical studies have examined the effects of neutrino neutral-current scattering on fast flavor conversion (FFC). Those studies are in apparent conflict, with some finding enhancement of flavor conversion and others finding suppressi
Autor:
Lucas Johns, Zewei Xiong
Publikováno v:
Physical review / D 106(10), 103029 (2022). doi:10.1103/PhysRevD.106.103029
Physical Review
Physical Review
Fast and collisional flavor instabilities possibly occur in the neutrino decoupling regions of core-collapse supernovae and neutron-star mergers. To gain a better understanding of the relevant flavor dynamics, we numerically solve for the collisional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90f1d7016e9c1653bf6f469b0696f7ce
Autor:
Hiroki Nagakura, Lucas Johns
Publikováno v:
Physical Review D. 104
Fast-pairwise neutrino oscillations potentially affect many aspects of core-collapse supernova (CCSN): the explosion mechanism, neutrino signals, and nucleosynthesis in the ejecta. This particular mode of collective neutrino oscillations has a deep c
Autor:
Lucas Johns, Hiroki Nagakura
Publikováno v:
Physical Review
With the recognition that fast flavor instabilities likely affect supernova and neutron-star-merger neutrinos, using simulation data to pin down when and where the instabilities occur has become a high priority. The effort faces an interesting proble
Autor:
Lucas Johns, Hiroki Nagakura
Two-moment neutrino transport methods have been widely used for developing theoretical models of core-collapse supernova (CCSN), since they substantially reduce the computational burden inherent in the multi-dimensional neutrino-radiation hydrodynami
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aeedc1885b84eca84fcfc38b72e9ec9d
http://arxiv.org/abs/2104.05729
http://arxiv.org/abs/2104.05729
Autor:
Lucas Johns
Publikováno v:
Physical Review
Geometric (Aharonov--Anandan) phases in neutrino oscillations have been claimed [Phys. Lett. B 780 (2018) 216] to be sensitive to the Majorana phases in neutrino mixing. More recently, however, it has been pointed out [Phys. Lett. B 818 (2021) 136376
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::747d49cc76e7cdf5eefc1ec3780bee33
Autor:
Lucas Johns
Publikováno v:
Physical Review Letters
A lingering mystery in core-collapse supernova theory is how collective neutrino oscillations affect the dynamics. All previously identified flavor instabilities, some of which might make the effects considerable, are essentially collisionless phenom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4a0edbe7e41357817ee823303a19f42
Fast-pairwise collective neutrino oscillation represents a key uncertainty in the theory of core-collapse supernova (CCSN). Despite the potentially significant impact on CCSN dynamics, it is usually neglected in numerical models of CCSN because of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50956b2109681c518ec927f383bf32ff
Publikováno v:
Physical Review
Recent theoretical work indicates that the neutrino radiation in core-collapse supernovae may be susceptible to flavor instabilities that set in far behind the shock, grow extremely rapidly, and have the potential to profoundly affect supernova dynam