# Veneziano amplitude

In theoretical physics, the **Veneziano amplitude** refers to the discovery made in 1968 by Italian theoretical physicist Gabriele Veneziano that the Euler gamma function, when interpreted as a scattering amplitude, has many of the features needed to explain the physical properties of strongly interacting mesons, such as symmetry and duality.^{[1]} Conformal symmetry was soon discovered. The formula is the following:

- .

*k*_{n} is a vector (such as a four-vector) referring to the momentum of the n^{th} particle. Γ is the gamma function.

This discovery can be considered the birth of string theory,^{[2]} as the discovery and invention of string theory came about as a search for a physical model which would give rise to such a scattering amplitude.

## See also

## External links

- String Theory and M-Theory, Lecture 6, Video lecture by Leonard Susskind on Veneziano amplitude. (Stanford University)

## References

- ↑ Veneziano, G. (1968). "Construction of a crossing-symmetric, Regge-behaved amplitude for linearly rising trajectories".
*Nuovo Cimento A*.**57**: 190–7. - ↑ Di Vecchia, P. (2008). "The Birth of String Theory". In Gasperini, Maurizio; Maharana, Jnan.
*String Theory and Fundamental Interactions – Gabriele Veneziano and Theoretical Physics: Historical and Contemporary Perspectives*(PDF). Lecture Notes in Physics.**737**. Springer. pp. 59–118. ISBN 978-3-540-74232-6.

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