Coherence and flavor transformations of supernova neutrinos

• Grant number: 19/22961-9
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• Start date: December 18, 2019
• End date: December 17, 2020
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Orlando Luis Goulart Peres
• Grantee: Yago Philippe Porto Silva
• Supervisor: Alexei Yuryevich Smirnov
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Max Planck Society, Heidelberg, Germany
• Associated to the scholarship: 17/05515-0 - Non-standard neutrino interactions in longbaseline neutrino experiment, BP.DD

Abstract

Supernovae produced by the collapse of massive stars produce large fluxes of neutrinos that could be detected on the Earth. However, many details of the neutrino flavor transformations at this stage of stellar evolution are not yet fully understood, and new phenomena, such as collective oscillations, could arise. The produced neutrino wave-packets are very short and, therefore, might undergo fast spatial separation and propagation decoherence together with flavor evolution. We intend to study the spatial separation of the wave-packets by assuming that all neutrinos in the environmental background travel in the same direction. This assumption is supposed to simplify the problem and allow us to find the evolution equation for the propagating neutrino. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PORTO-SILVA, YAGO P.; PRAKASH, SUPRABH; PERES, O. L. G.; NUNOKAWA, HIROSHI; MINAKATA, HISAKAZU. Constraining visible neutrino decay at KamLAND and JUNO. EUROPEAN PHYSICAL JOURNAL C, v. 80, n. 10, OCT 29 2020. (16/08308-2, 19/22961-9, 14/19164-6, 17/02361-1, 17/05515-0)

PORTO-SILVA, YAGO P.; DE OLIVEIRA, M. C.. Theory of neutrino detection: flavor oscillations and weak values. EUROPEAN PHYSICAL JOURNAL C, v. 81, n. 4, APR 2021. (17/05515-0, 19/22961-9)

PORTO-SILVA, YAGO P.; SMIRNOV, ALEXEI YU. Coherence of oscillations in matter and supernova neutrinos. Journal of Cosmology and Astroparticle Physics, n. 6, JUN 2021. (19/22961-9, 17/05515-0)

JANA, SUDIP; PORTO-SILVA, YAGO P.; SEN, MANIBRATA. Exploiting a future galactic supernova to probe neutrino magnetic moments. Journal of Cosmology and Astroparticle Physics, v. N/A, n. 9, p. 25-pg., 2022-09-01. (19/22961-9, 17/05515-0)