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

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arxiv nucl-th/0501065 v3 pith:Q2Z7R5GV submitted 2005-01-26 nucl-th

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

classification nucl-th
keywords effectfinite-sizelifetimeproductionspace-timemeasurementneglectaccount
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 3 Pith papers

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  2. When positive and negative pairs differ in femtoscopy: residual Coulomb and isospin effects

    nucl-th 2026-06 unverdicted novelty 5.0

    Residual Coulomb and isospin effects produce charge-dependent splittings in identical-particle correlation functions, strongest at low kT, that modify fitted radii.

  3. Can the strong interactions between hadrons be determined using femtoscopy?

    nucl-th 2025-04 unverdicted novelty 3.0

    The universality assumption in the Koonin-Pratt formula for femtoscopic correlations introduces potentially large intrinsic uncertainty when extracting strong interactions between hadrons like nucleons.