Dear Andrzej Pelczar ,

To conceptualize a hypothetical object that can exist in the same spatial coordinates and time as known material objects while disregarding macroscopic absorption phenomena, the object would need to satisfy certain conditions based on the properties of matter and interaction with fundamental forces:

1. Gravitational Interaction:

The object must possess mass or energy under general relativity so that it can interact gravitationally with other objects. Gravitational interactions are mediated by the curvature of spacetime induced by mass-energy, and the object must contribute to or respond to this curvature. If the object has mass, it will interact with gravitational fields according to the standard principles of gravitation.

2. Weak or Nonexistent Electromagnetic Interaction:

For the object to coexist with known material objects without significantly interacting with them, it must exhibit negligible or no interaction with the electromagnetic field. This would require the object to be electrically neutral (as is the case with neutrinos) and not interact with photons, the mediators of electromagnetic force. As such, the object would not scatter, absorb, or emit electromagnetic radiation, maintaining the integrity of the surrounding electromagnetic environment.

3. Transparency to Matter:

The object should not interact strongly with matter, particularly through strong nuclear forces (responsible for binding quarks and nucleons) or weak nuclear forces (mediating particle decays). This would ensure that the object does not disrupt atomic or subatomic structures and can pass through ordinary matter without altering its properties or inducing particle reactions. Essentially, the object would be transparent to matter at the atomic scale.

4. Minimal Interaction with Known Fundamental Forces (Other Than Gravity):

The object must exhibit very weak interactions with fundamental forces, particularly the strong and weak nuclear forces, to avoid significant disruptions in atomic and subatomic systems. Thus, while it may interact gravitationally due to its mass, it would otherwise remain largely undetectable and non-interfering in terms of other forces.

Can a Neutrino Fulfill These Assumptions?

A neutrino comes close to fulfilling the requirements for this hypothetical object:

• Gravitational Interaction: Neutrinos have a nonzero mass (albeit extremely small), which means they interact with gravitational fields, consistent with general relativity. Although the mass of neutrinos is minuscule, they still contribute to spacetime curvature.
• Electromagnetic Invisibility: Neutrinos are electrically neutral, meaning they do not interact with the electromagnetic field. As a result, they are transparent to electromagnetic radiation, allowing them to coexist with material objects without altering electromagnetic interactions.
• Weak Nuclear Interaction: Neutrinos only interact via the weak nuclear force, which is extremely weak and acts over very short ranges. This means that neutrinos can travel through matter (including planets and stars) without causing significant disturbances or interacting strongly with other particles.

While neutrinos can interact weakly, their effects are typically indirect and occur at very low rates, making them effectively transparent to macroscopic material systems.

Higgs Boson and Gravitational Interactions:

It is important to note that the Higgs boson does not mediate gravitational interactions. The Higgs boson is associated with the Higgs field, which provides mass to elementary particles through the Higgs mechanism. The mass acquired by particles via this interaction allows them to interact gravitationally according to their mass-energy. However, the Higgs boson itself does not directly mediate gravitational forces, which are still understood to be governed by general relativity and mediated by the graviton (a hypothetical quantum particle that mediates gravitational forces).

Gravitational interactions between objects are determined by their mass and the resulting curvature of spacetime, independent of their mass origin (whether from the Higgs field or other mechanisms).

Conclusion:

A neutrino is a plausible candidate for a hypothetical object that could coexist in the same spacetime as ordinary material objects while minimally interacting with them. Due to its very weak interactions with matter and electromagnetic fields, it can pass through known materials without significantly altering their macroscopic properties. The Higgs boson is related to the generation of mass via the Higgs field but does not mediate gravitational interactions directly. Gravitational effects, instead, arise from mass and are described by general relativity.

For the scientific concepts discussed in the response, here are some references that would support the information:

These references cover the core concepts of gravitational interaction, neutrino properties, the Higgs mechanism, and weak nuclear interactions.

Thanks

Thank you,

Andrzej