Do Massive Objects Like the Sun Deflect Neutrinos?

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Discussion Overview

The discussion centers on whether massive objects, like the Sun, deflect the paths of neutrinos, exploring the implications of general relativity and the properties of neutrinos in relation to gravity. The scope includes theoretical considerations and conceptual clarifications regarding the behavior of neutrinos in gravitational fields.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants assert that if the Sun deflects photons, it should also deflect neutrinos, as they are massive particles.
  • Others question the nature of neutrinos, noting that they have nonzero rest mass but travel very close to the speed of light, raising doubts about their behavior in gravitational fields.
  • One participant emphasizes that everything is deflected by gravity due to the properties of spacetime, suggesting that this applies universally regardless of particle type.
  • A later reply references general relativity, stating that mass bends spacetime, thus affecting both light and neutrinos.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of neutrinos in gravitational fields, with some agreeing that massive objects should deflect them while others raise questions about the implications of their near-light-speed travel. The discussion remains unresolved regarding the specifics of neutrino deflection.

Contextual Notes

There are limitations in the discussion regarding the assumptions about neutrino mass and speed, as well as the dependence on interpretations of general relativity. The nuances of how these factors interact with gravitational fields are not fully explored.

HeavyWater
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TL;DR
Do massive objects deflect the trajectories of neutrinos?
We know the results of Einstein's experiment in 1919. Simply stated, the sun deflected the paths of photons. The results were exciting for many reasons--one of which was that photons have no mass. Neutrinos do have mass. Do other massive objects, such as the sun, deflect the paths of neutrinos?
 
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Yes. Why would neutrinos be any different from any other massive particle in this regard?
 
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Thank you for the rapid response Orodruin.
 
Orodruin said:
Yes. Why would neutrinos be any different from any other massive particle in this regard?
Don't Neutrinos have nonzero rest mass and still travel at lightspeed? Could this possibly give them the inertia needed to continue in a straight line, piercing stars and galaxies unbent as well as unslowed?
Doubtful, but do we know?
 
They typically travel at a speed very close to but below the speed of light. The difference is too small to measure it but it is there.
Everything is deflected by gravity. This is a property of spacetime, it doesn't depend on the particle type.
 
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HeavyWater said:
Summary: Do massive objects deflect the trajectories of neutrinos?
To your question, general relativity tells us that mass bends space-time. So light and neutrinos are deflected by massive objects.
 
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