Exact sum rules for the decay constant of the neutral pion

Roy, Probir (1974) Exact sum rules for the decay constant of the neutral pion Physical Review D - Particles, Fields, Gravitation and Cosmology, 9 (9). pp. 2631-2635. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v9/i9/p2631_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.9.2631


Two new sum rules are obtained from fairly general assumptions. They relate the π0 decay constant to appropriate energy integrals of the differences between the total hadronic production cross sections of two real photons (i) of equal and opposite helicities and (ii) of parallel and perpendicular linear polarizations. The sum rules are derived by both dispersion-theoretic and light-plane methods. The experimental verification of these sum rules will be possible in the near future by studying the reaction ee→(eeγγ)→ee + "anything hadronic" with polarized colliding beams in storage rings. Theoretical and experimental aspects of these questions are discussed.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:46538
Deposited On:05 Jul 2011 06:10
Last Modified:05 Jul 2011 06:10

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