The 2008.5.15th edition

Neutrino is suitable as gravity cause material.
Neutrino has extremely small of the rest mass, goes straight by speed of light, and has a big kinetic energy.

�@ Figure shows the relation of momenta when object Ma of minimum mass collides with heavy object Mb as elastic collision. Ma that has flown from the direction of A collides at P point, and goes in the direction of B of symmetry with OC which is normal. Mb hardly moves even if the momenta is gotten by the collision because it is heavy.
Then, both laws of the energy conservation and the momentum conserving are considered. First of all, because Mb doesn't move, the received kinetic energy is none. And from the energy conservation law, Ma maintains same kinetic energy before and after collision. Threfore, absolute value of momenta of Ma before and after collision also doesn't change. Momenta is a vector with size and direction. Before and after the collision, momenta vectors are in the relation of parallelogram as shown in figure, and Mb receives a big momenta vector to the normal direction.
Here, vector AP and PB are momenta of Ma before and after the collision. Vector CP is a momenta that Mb receives by collision. It becomes AP=CP+PB from the law of conservation of momentum before and after collision.

Point aimed at in this collision:
As for Ma, kinetic energy is invariable, and the absolute value of momenta is also invariable.
Mb gets a big momenta without receiving energy. Though momenta becomes origin of force, there are no heating etc. by energy.

By the way, elastic collision seems to be basic of gravity theories of neutrino when mass of Mb is not infinity and is several digit larger than Ma.
�la loses a part of kinetic energy, and absolute value of momenta also becomes small a little.
The received energy is generated in Mb. A big momenta is unchanged ..getting... Momenta becomes origin of force, and there are some heating etc. by energy, too.


Gravity theory by elastic collision of neutrino comes out !
There is bulky object M in space, and it is assumed the one that neutrino pours down from all directions of space. Majority of many neutrinos get through as if there is no object. A part of many neutrinos collide elasticly to M and returns to space. And a part of kinetic energy of each neutrino is lost, and the absolute value of momenta becomes small a little.
In a word, about the direction going to M from space and the opposite direction going to space from M, the energy of neutrino of the latter is small. Quite a lot of similar collisions happen in all directions uniformly, and a gravity field toward M appears.


It returns.



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