Mimar Sinan Güzel Sanatlar Üniversitesi Açık Bilim, Sanat Arşivi
Açık Bilim, Sanat Arşivi, Mimar Sinan Güzel Sanatlar Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.MSGSÜ'de Ara
Yazar "Kajino, Toshitaka" için listeleme
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Big-bang nucleosynthesis limit on the neutral fermion decays into neutrinos
Kusakabe, Motohiko; Balantekin, A. B.; Kajino, Toshitaka; Pehlivan, Y. (Amer Physical Soc, 2013)Using the primordial helium abundance, an upper limit to the magnetic moments for Dirac neutrinos had been provided by imposing restrictions on the number of the additional helicity states. Considering nonthermal photons ... -
Can We Scan the Supernova Model Space for Collective Oscillations?
Pehlivan, Y.; Subasi, A. L.; Birol, S.; Ghazanfari, N.; Yuksel, H.; Balantekin, A. B.; Kajino, Toshitaka (Amer Inst Physics, 2016)Collective neutrino oscillations in a core collapse supernova is a many-body phenomenon which can transform the neutrino energy spectra through emergent effects. One example of this behavior is the neutrino spectral swaps ... -
Collective neutrino-flavor oscillations and application to supernova nucleosynthesis
Sasaki, Hirokazu; Takiwaki, Tomoya; Kajino, Toshitaka; Hidaka, Jun; Maruyama, Tomoyuki; Pehlivan, Yamac; Balantekin, Baha (Physical Society Japan, 2016)There are still poorly known non-linear effects caused by coherent scatterings of self-interacting neutrinos emitted from the proto-neutron star in core-collapse supernovae. One of these effects manifests itself in flavor ... -
EFFECTS OF SHOCK PROPAGATION ON NEUTRINO OSCILLATION AND ?-INDUCED NUCLEOSYNTHESIS IN SUPERNOVA
Ko, Heamin; Cheoun, Myung-Ki; Kusakabe, Motohiko; Kajino, Toshitaka; Ekinci, Basak; Pehlivan, Yamac (Jagiellonian Univ Press, 2019)We discuss effects of shock propagation on neutrino (nu) oscillation in supernova environment, which affects directly nu-induced nucleosynthesis. Since electron number density varies rapidly behind and in front of the ... -
Invariants of collective neutrino oscillations
Pehlivan, Y.; Balantekin, A. B.; Kajino, Toshitaka; Yoshida, Takashi (Amer Physical Soc, 2011)We consider the flavor evolution of a dense neutrino gas by taking into account both vacuum oscillations and self-interactions of neutrinos. We examine the system from a many-body perspective as well as from the point of ... -
Neutrino magnetic moment, CP violation, and flavor oscillations in matter
Pehlivan, Y.; Balantekin, A. B.; Kajino, Toshitaka (Amer Physical Soc, 2014)We consider collective oscillations of neutrinos, which are emergent nonlinear flavor evolution phenomena instigated by neutrino-neutrino interactions in astrophysical environments with sufficiently high neutrino densities. ... -
Neutron stars in a perturbative f(R) gravity model with strong magnetic fields
Cheoun, Myung-Ki; Deliduman, Cemsinan; Gungor, Can; Keles, Vildan; Ryu, C. Y.; Kajino, Toshitaka; Mathews, Grant J. (Iop Publishing Ltd, 2013)In Kaluza-Klein electromagnetism it is natural to associate modified gravity with strong electromagnetic fields. Hence, in this paper we investigate the combined effects of a strong magnetic field and perturbative f(R) ... -
On the Neutrino Self Refraction Problem from a Many-Body Perspective
Pehlivan, Y.; Kajino, Toshitaka; Balantekin, A. B.; Yoshida, Takashi; Maruyama, Tomoyuki (Amer Inst Physics, 2010)We consider a dense neutrino gas as a many body system by taking into account both vacuum oscillations and self interactions of neutrinos. We show that the exact many body Hamiltonian which describes the flavor oscillations ... -
Photodisintegration at High Temperature
Pehlivan, Y.; Kajino, Toshitaka; Balantekin, A. B.; Mathews, G. J.; Kusakabe, Motohiko (Amer Inst Physics, 2010)The conventional method of calculating rates for photodisintegration reactions treats the photon as a classical particle and therefore is missing a correction due to the quantum statistics of the photon energy distribution. ... -
Possible Ambiguities in the Equation of state for Neutron Stars
Cheoun, Myung-Ki; Miyatsu, Tsuyoshi; Ryu, C. Y.; Deliclumani, Cemsinan; Gungor, Can; Keles, Vildan; Kajino, Toshitaka (Amer Inst Physics, 2014)We addressed possible ambiguities on the properties of neutron stars (NSs) estimated in theoretical sides. First, roles of hyperons inside the NS are discussed through various relativistic mean field (RMF) theories. In ... -
QUANTUM STATISTICAL CORRECTIONS TO ASTROPHYSICAL PHOTODISINTEGRATION RATES
Mathews, G. J.; Pehlivan, Yamac; Kajino, Toshitaka; Balantekin, A. B.; Kusakabe, Motohiko (Iop Publishing Ltd, 2011)Tabulated rates for astrophysical photodisintegration reactions make use of Boltzmann statistics for the photons involved as well as the interacting nuclei. Here, we derive analytic corrections for the Planck-spectrum ... -
Solution to Big-Bang nucleosynthesis in hybrid axion dark matter model
Kusakabe, Motohiko; Balantekin, A. B.; Kajino, Toshitaka; Pehlivan, Y. (Elsevier, 2013)Following a recent suggestion of axion cooling of photons between the nucleosynthesis and recombination epochs in the Early Universe, we investigate a hybrid model with both axions and relic supersymmetric particles. In ...
