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The Sanford-Wang parameterisation is a an empirical formula used to model the production of [[pions]] in nuclear interaction of the form p+A → <math>\pi^+</math>+X where a beam of high-energy [[protons]] hit a material.
Its formula for the double-differential [[Cross section (physics)|cross section]] with respect to momentum (p) and solid angle (<math>\Omega</math>) is as follows.
* J. R. Sanford and C. L. Wang, Brookhaven National Laboratory, AGS internal report, 1967 (unpublished); C. L. Wang, Phys. Rev. Letters '''25''', 1068 (1970); ibid. '''25''', 1536(E) (1970).
[[Category:Experimental particle physics]]