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arXiv · 1209.2661

Threshold neutral pion photoproduction off the tri-nucleon to O(q^4)

Mark Lenkewitz·Evgeny Epelbaum·H. -W. Hammer·Ulf-G. Meißner
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Abstract

We calculate electromagnetic neutral pion production off tri-nucleon bound states (3H, 3He) at threshold in chiral nuclear effective field theory to fourth order in the standard heavy baryon counting. We show that the fourth order two-nucleon corrections to the S-wave multipoles at threshold are very small. This implies that a precise measurement of the S-wave cross section for neutral pion production off 3He allows for a stringent test of the chiral perturbation theory prediction for the S-wave electric multipole E_{0+}^{pi0 n}.

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Mark Lenkewitz, Evgeny Epelbaum, H. -W. Hammer, Ulf-G. Meißner. 2012-09-12. Threshold neutral pion photoproduction off the tri-nucleon to O(q^4). https://doi.org/10.1140/epja/i2013-13020-1

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