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Finite-size effect on two-particle production in continuous and discrete spectrum

Lednický, R.

Physics of particles and nuclei, 2009-05, Vol.40 (3), p.307-352 [Periódico revisado por pares]

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Título:
Finite-size effect on two-particle production in continuous and discrete spectrum
Autor: Lednický, R.
Assuntos: CENTER-OF-MASS SYSTEM ; HADRONIC ATOMS ; Particle and Nuclear Physics ; PARTICLE PRODUCTION ; Physics ; Physics and Astronomy ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; QUANTUM FIELD THEORY ; SPACE-TIME
É parte de: Physics of particles and nuclei, 2009-05, Vol.40 (3), p.307-352
Descrição: The formalism allowing one to account for the effect of a finite space-time extent of particle production region is given. Its applications to the lifetime measurement of hadronic atoms produced by a high-energy beam in a thin target, as well as to the femtoscopy techniques widely used to measure space-time characteristics of the production processes, are discussed. Particularly, it is found that the neglect of the finite-size effect on the pionium lifetime measurement in the experiment DIRAC at CERN could lead to the lifetime overestimation comparable with the 10% statistical error. The theoretical systematic errors arising in the calculation of the finite-size effect due to the neglect of non-equal emission times in the pair center-of-mass system, the space-time coherence and the residual charge are shown to be negligible.
Editor: Dordrecht: SP MAIK Nauka/Interperiodica
Idioma: Inglês

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