Some words more about the possibility to test the String theory in the last generation particle accelerators

String scientits envisage 3 possibilities

a) what we call "particles" are nothing else that modes of vibrations of basic entities called strings.
Same as the string of a guitar the frequency of vibration depends upon the rigidity of the string and the rigidity depends also on length of the string
If the lenght of the string is not so small than high energy collisions should produce particles having mass of abt 1000 protons

This amount of energy will be available at LHC

By the way these "monsters" have been already found in the cosmic radiations


b) The gravitational force should increase at very short distances consequently, according to the calculus an high pressure should poduce " micro black holes " which last for a fraction of time and again yhey will produce new unknown particles

c) One of "untouchable" principle of physics could fail
The principle of conservation of energy
A portion of energy could , apparently, disppear in the hidden dimensions

The key issue is the size of the strings and of the hidden dimensions, assuming of course that they exist
According to the calculus,if this size is at the scale of Planck than LHC is sufficient if it is much smaller it is not

P.S.

About the supposed assumption that a " direct " prove is needed to confirm the theory of the strings
This is absolutly false

The "Quarks" have been introduced, at the very beginning, as mathematical entities
Even nowadays , nobody have yet " seen " a single quark
The Quarks come always togheter
You can directly measure, for example, the mass, of a proton but not of its quarks
Neverveles Quarks are , nowadays , considered real entitities simply because the predictions of the theory meet the experimental tests

Why should we deny, in priciple, that this can not happen also for the strings ?