Upper bounds on the fine structure constant and on nucleon magnetic moments in terms of Compton scattering cross-sections

Roy, S. M. ; Vengurlekar, A. S. (1976) Upper bounds on the fine structure constant and on nucleon magnetic moments in terms of Compton scattering cross-sections Nuclear Physics B, 114 (3). pp. 449-457. ISSN 0550-3213

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/055032...

Related URL: http://dx.doi.org/10.1016/0550-3213(76)90444-2

Abstract

We derive and compare with experimental data the bound α≤−λmp-mpν12/2π2ν0dν'σtot(ν')/(ν'212)+2πmp[∫ν0ν'2dν'σtot(ν')/(ν'212){ν'2(dσ/dt)0+πλ2+2ν'|λ|√π√(dσ/dt)0−σ2tot/16π}]−1, where α is the fine-structure constant, mp the proton mass, ν0 the photo-pion production threshold, σtot and (dσ/dt)0 are the unpolarized total hadronic photo-absorption cross section on protons and the unpolarized forward differential cross section for proton Compton scattering at photon-lab energy ν', and λ and ν1 are any real numbers. We derive similar bounds on proton and neutron magnetic moments.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:42852
Deposited On:07 Jun 2011 05:40
Last Modified:18 May 2016 00:01

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