No. There’s no such thing as a ``small" or ``large" particle. Collisions between particles produce states consistent with conservation laws.
These are the conservation of energy, momentum and angular momentum on the one hand; and the conservation laws of the ``internal'' symmetries (such as charge conservation, baryon and lepton number conservation) on the other hand.
So a state of an electron and a proton can’t produce a state of just photons due to the conservation of baryon number and lepton number, for instance. (And electron capture will produce a neutrino.)
It can produce a state that includes photons, but there will be other particles produced, as well.
So
e + p -> e + p + γ
is possible.
As are
e + p -> e + e + e+ + p
and
e + p -> e + p + p + p-
depending on the energy. Here e+ is the positron and p- the antiproton. And (depending on the energy) it's possible to have photons in the final state as well.
~_~ The photon gains the charge potential energy and flies with the photon mass, which can meet the conservation of mass and energy at the same time, and no need for an explanation of mass energy conversion.
Photons (corpuscles of radiation) are the most basic 3D matter-particles. Photons, in various combinations, form all other primary and superior fundamental 3D matter-particles. Results of collisions between fundamental 3D matter-particles depend on relative directions of motions and relative phases of constituent photons. See: http://vixra.org/pdf/1404.0005v1.pdf
The acceleration of electrons originates from force, and the force acts on particles instead of fields. How to produce the light speed motion of the field (electromagnetic waves)? the passive field of flight, and the momentum;
Electron/proton collisions with an extremely high energy and an extremely small collision parameter (the vertical distance between speed vector and collision partner) can cause elementary particle reactions.
But this is not worth investigation becaus the huge rest mass difference between proton and electron prevents getting a high reaction energy.
Not quite the same thing, but... You can get a photon if you collide an electron and a positron. This is called electron-positron annihilation. (Actually, you get two gamma rays, heading in exactly opposite directions.) Recently, it was discovered that so-called lightning superbolts can convert nitrogen-14 to carbon-14 by ejecting a positron, which quickly finds a loose electron, annihilating the pair. This produces gamma rays of a specific energy, which is how the production of antimatter by lightning was discovered. Prior to that it was not thought that antimatter could be naturally produced in our atmosphere except by cosmic rays.
The electric field of a charged particle has no force on itself, indicating that the electrostatic effect is the effect between the charged particles, not the effect between the field and the charged particle, and the electric field is an active field. Similarly, the magnetic field is also an active field. There are no flying passive electromagnetic fields (electromagnetic waves), light is a particle.
Atoms emit light with quantum, which is discontinuous energy quanta, which originate from discontinuous mass of particles, and cannot be considered discontinuous in motion.
Sitting on a high-speed ship or standing in different positions will cause the observation time (consciousness) to be delayed or advanced, not changing the observation object or observer. The order of observing lightning sounds cannot change the quantity, size, and lifespan of lightning. The "a slower clock ", "a shorter length", and "grandfather paradox" all stem from the absurd "creation hypothesis", which undermines the traditional human concept of time and space for thousands of years. The bigger problem is that lies require more lies.