Spacetime evolution of lepton number densities and wave-packet-like effects for neutrino flavor and chiral oscillations in quantum field theory

被引：0
作者：
Adam, Apriadi Salim [1 ]
Benoit, Nicholas J. [2 ]
Kawamura, Yuta
Matsuo, Yamato
Morozumi, Takuya [2 ,3 ]
Shimizu, Yusuke [2 ,3 ]
Toyota, Naoya
机构：
[1] Natl Res & Innovat Agcy BRIN, Res Ctr Quantum Phys, South Tangerang 15314, Indonesia
[2] Hiroshima Univ, Phys Program, Grad Sch Adv Sci & Engn, Higashihiroshima 7398526, Japan
[3] Hiroshima Univ, Core Res Energet Universe, Higashihiroshima 7398526, Japan
来源：
PHYSICAL REVIEW D | 2023年 / 108卷 / 05期
基金：
日本学术振兴会;
关键词：
MECHANICS; STATES;
D O I：
10.1103/PhysRevD.108.056009
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a formulation of lepton family numbers, based on quantum field theory, for neutrino oscillation phenomenology that can be applied to nonrelativistic and relativistic energies for neutrinos. It is formulated for both types of neutrinos, Dirac and Majorana. The formulation is constructed as the time evolution of a lepton family number density operator. Then, the time evolution of the lepton family number density operator becomes dependent on the mass and new features appear. The expectation value of the density operator is evaluated for the initial state with a Gaussian distribution for the momentum amplitude. This enables us to study wave-packet-like decoherence effects. We show in the nonrelativistic regime, the type of neutrino mass are distinguishable even under the presence of wave-packet-like decoherence effects.
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页数：22
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