Physics:Dual resonance model
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In theoretical physics, a dual resonance model arose during the early investigation (1968–1973) of string theory as an S-matrix theory of the strong interaction.
Overview
The dual resonance model was based upon the observation that the amplitudes for the s-channel scatterings matched exactly with the amplitudes for the t-channel scatterings among mesons and also the Regge trajectory. It began with the Euler beta function model of Gabriele Veneziano in 1968 for a 4-particle amplitude which has the property that it is explicitly s–t crossing symmetric, exhibits duality between the description in terms of Regge poles or of resonances, and provides a closed-form solution to non-linear finite-energy sum rules relating s- and t- channels.
The Veneziano formula was quickly generalized to an equally consistent N-particle amplitude[1] for which Yoichiro Nambu,[2] Holger Bech Nielsen,[3] and Leonard Susskind[4] provided a physical interpretation in terms of an infinite number of simple harmonic oscillators describing the motion of an extended one-dimensional string, hence came the name "string theory."
The study of dual resonance models was a relatively popular subject of study between 1968 and 1973.[5] It was even taught briefly as a graduate level course at MIT, by Sergio Fubini and Veneziano, who co-authored an early article.[6] It fell rapidly out of favor around 1973 when quantum chromodynamics became the main focus of theoretical research[7] (mainly due to the theoretical appeal of its asymptotic freedom).[8]
See also
- QCD string
- Lund string model
Notes
- ↑ Koba, Z.; Nielsen, H.B. (1969). "Reaction amplitude for n-mesons a generalization of the Veneziano-Bardakçi-Ruegg-Virasoro model". Nuclear Physics B (Elsevier BV) 10 (4): 633–655. doi:10.1016/0550-3213(69)90331-9. ISSN 0550-3213.
- ↑ Nambu, Y. (1970). "Quark model and the factorization of the Veneziano amplitude." In R. Chand (ed.), Symmetries and quark models (pp. 269–277). Singapore: World Scientific.
- ↑ Nielsen, H. B. "An almost physical interpretation of the dual N point function." Nordita preprint (1969); unpublished.
- ↑ Susskind, Leonard (1970-02-15). "Structure of Hadrons Implied by Duality". Physical Review D (American Physical Society (APS)) 1 (4): 1182–1186. doi:10.1103/physrevd.1.1182. ISSN 0556-2821.
- ↑ Rickles 2014, pp. 5–6, 44.
- ↑ Fubini, S.; Veneziano, G. (1969). "Level structure of dual-resonance models". Il Nuovo Cimento A (Springer Science and Business Media LLC) 64 (4): 811–840. doi:10.1007/bf02758835. ISSN 0369-3546.
- ↑ Rickles 2014, p. 77.
- ↑ Rickles 2014, p. 11 n. 22.
References
- Rickles, Dean (2014). A Brief History of String Theory: From Dual Models to M-Theory. Springer. ISBN 978-3-642-45128-7.
Further reading
- Paul H. Frampton (1974). Dual Resonance Models. Frontiers in Physics. ISBN 0-8053-2581-6.
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