Is the GSI anomaly due to neutrino oscillations? A real time perspective

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.045027· OSTI ID:21421014

Jun, Wu; Boyanovsky, Daniel ^[1]; Hutasoit, Jimmy A; Holman, Richard ^[2]

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1. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
2. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

We study a model for the 'GSI anomaly' in which we obtain the time evolution of the population of parent and daughter particles directly in real time, considering explicitly the quantum entanglement between the daughter particle and neutrino mass eigenstates in the two-body decay. We confirm that the decay rate of the parent particle and the growth rate of the daughter particle do not feature a time modulation from interference of neutrino mass eigenstates. The lack of interference is a consequence of the orthogonality of the mass eigenstates. This result also follows from the density matrix obtained by tracing out the unobserved neutrino states. We confirm this result by providing a complementary explanation based on Cutkosky rules applied to the Feynman diagram that describes the self energy of the parent particle.

• OSTI ID: 21421014
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevD.82.045027; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DENSITY MATRIX
EIGENSTATES
FEYNMAN DIAGRAM
INTERFERENCE
MASS
NEUTRINO OSCILLATION
NEUTRINOS
PARTICLE DECAY
QUANTUM ENTANGLEMENT
SELF-ENERGY
TWO-BODY PROBLEM
DECAY
DIAGRAMS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
INFORMATION
LEPTONS
MANY-BODY PROBLEM
MASSLESS PARTICLES
MATRICES