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Instructions to Authors www.elsevier.com/locate/physletb Instructions to authors Aims and Scope Physics Letters B ensures the rapid publication of letter-type communications in the fields of Nuclear Physics, Particle Physics and Astrophysics. Articles should influence the physics community significantly. Submission Electronic submission is strongly encouraged. The electronic file, accompanied by a covering message, should be e-mailed to one of the Editors indicated below. If electronic submission is not feasible, submission in print is possible, but it will delay publication. In the latter case manuscripts (one original + two copies), accompanied by a covering letter, should be sent to one of the following Editors: L. Alvarez-Gaumé, Theory Division, CERN, CH-1211 Geneva 23, Switzerland, E-mail address: Luis.Alvarez-Gaume@CERN. CH Theoretical High Energy Physics (General Theory) J.-P. 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Smith, Field theory in particle physics, Vol. 1 (North-Holland, Amsterdam, 1986). For a paper in a journal: UAl Collab., G. Arnison et al., Phys. Lett. B 177 (1986) 244. For a paper in a contributed volume: R. Jackiw, in: Progress in quantum field theory, eds. H. Ezawa and S. Kamefuchi (North-Holland, Amsterdam, 1986) p. 83. For an unpublished paper: J.F. Gunion and H.E. Haber, UCD Report 86-12 (1986), unpublished. For a preprint: A. Lahanas and D.V. Nanopoulos, CERN preprint CERN-TH 4400/86 (1986). For a conference report: M.B. Green, Superstrings and the unification of forces and particles, in: Proc. fourth Marcel Gross- mann Meeting on General relativity (Rome, June 1985), Vol. 1, ed. R. Ruffini (North-Holland, Amsterdam, 1986) p. 203. (10) Figures: Each figure should also be submitted in triplicate: one master figure and two copies, the figure must be referred to in the text, be numbered and have a caption. The captions should be collected on a separate sheet. 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