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Positronium - hydrogen-atom scattering using the static exchange model

In calculating the off-shell part of the Born - Oppenheimer amplitude there was a mistake in programming. Therefore our static exchange results were not correct. Our corrected results for tables 1, 2 and 3 are shown below: Table 1. The s-wave phaseshifts in radians for Ps(1s)+H(1s) scattering. Table 2. p- and d- wave phaseshifts for Ps(1s)+H(1s) scattering. Table 3. Elastic total (σ) and quenching (σq) cross sections and the quenching ratio (σq/σ) for Ps(1s)+H(1s) scattering. Our Born results were correct. There is a marginal change in p- and d-wave phaseshifts. The results of the s-wave have been changed. The above results are now in good agreement with those of Hara and Fraser (1975). We are grateful to Dr R Drachman for pointing out the reference of Hara and Fraser and also requesting us to check the results. References Hara S and Fraser P A 1975 J. Phys. B: At. Mol. Phys. 8 L472