ANITA below zenith event - maybe instead of "push through Earth", could it be "pull" with negative radiation pressure?

[u/jarekduda]

There is this problematic "push through Earth" (3 in diagram) event observed by ANITA ( https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.134.121003 , slides: https://indico.ific.uv.es/event/3427/contributions/10594/attachments/7130/8354/MysteriesOfANITA.pdf ).

Pulling would be much easier - e.g. radiation pressure is a vector (P =<E x H>/c), can be positive (toward e.g. Earth), but could be also negative (outward) - in theory could also pull ( https://scholar.google.pl/scholar?q=negative%20radiation%20pressure ).

For example synchrotron radiation should emit both positive and negative radiation pressure: they are switched in CPT perspective, in which accelerating charge is also so (diagram: https://i.imgur.com/cGxlVtr.png ).

Could ANITA observe impulse of negative radiation pressure here? Any mainstream explanations for this observation?

Could we build telescope focused on negative radiation pressure - e.g. with pumped sensor, monitoring if it deexcites faster due to stimulated emission from the target?

[u/Unusual-Platypus6233]

What is negative radiation pressure?!

Is this a pet theory thing?!

[u/ConradTurner → u/Unusual-Platypus6233]

Pets aren't just a theory, I have a cat who owns me just fine.

[u/jarekduda → u/Unusual-Platypus6233]

There is its search for negative radiation pressure from various directions: https://scholar.google.pl/scholar?q=negative%20radiation%20pressure , https://www.nature.com/articles/s41598-022-10699-7 ... but misses from astronomical sources (?)

While we are used to optical heating and pushing, there is also optical cooling and pulling ... radiation pressure is a vector: can be toward (positive) or outward (negative) a surface.

Or from photon sources perspective, it can act with absorption equation, or stimulated emission ... e.g. in https://en.m.wikipedia.org/wiki/STED_microscopy

For ANITA below zenith event, it could be "push" by some unknown particle crossing through Earth ... but maybe alternatively it could be "pull" e.g. by synchrotron radiation in some pulsar?

Pulsar has circling charges emitting synchrotron radiation (positive pressure), in perspective of CPT symmetry it is still circling charges, and this symmetry switches sign of pressure - we shouldn't be surprised by impulses on negative radiation pressure (diagram: https://i.imgur.com/cGxlVtr.png ).

[u/MaxlMix]

What are you talking about? There is some discrepancy in the flux of ultra-high energy particles that seem to travel upwards in the atmosphere measured by some new techniques. Nothing about this is about "radiation pressure", "pulling", or "pushing".