“School of Physic”
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| Paper IPM / Physic / 7211 |
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We present Spinless Salpeter wave-function instead of Schrodinger wave-function in positronium to show that this make NRQED calculation easier. we also discuss that the singularity of the wave-function at the origin is necessary to cancel the ultraviolet divergence in NRQED calculations.
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