Renormalization of one-pion exchange in chiral effective field theory for antinucleon-nucleon scattering

Zhou, Daren; Long, Bingwei; Timmermans, R. E.; van Kolck, U.

doi:10.1103/physrevc.105.054005

Renormalization of one-pion exchange in chiral effective field theory for antinucleon-nucleon scattering

Journal Article · Thu May 26 00:00:00 EDT 2022 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.105.054005· OSTI ID:1869832

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Nanfang College (China); University of Arizona
Sichuan Univ., Chengdu (China)
Univ. of Groningen (Netherlands)
Univ. Paris-Saclay, Gif-sur-Yvette (France); Centre National de la Recherche Scientifique (CNRS) (France); IN2P3, Orsay (France)

The renormalization of iterated one-pion exchange (OPE) is studied in Chiral Effective Field Theory ($$\chi$$EFT) for the antinucleon-nucleon ($$\overline{N}N$$) system. The OPE potential is cut off at a certain distance and contact interactions are represented by a complex spherical well with the same radius. We investigate the dependence on the cutoff radius of the phase shifts, inelasticities, and mixing angles for the low partial waves in $$\overline{N}N$$ scattering. We show that renormalization requires additional contact interactions compared to the expectation based on naive dimensional analysis. Results after renormalization are compared with the state-of-the-art energy-dependent partial-wave analysis of $$\overline{N}N$$ data. We compare our conclusions with applications of $$\chi$$EFT to the nucleon-nucleon system.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-04ER41338

OSTI ID:: 1869832

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 105; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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