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Title: Two-nucleon S 0 1 amplitude zero in chiral effective field theory

Journal Article · · Physical Review C
 [1];  [1];  [2];  [3]
  1. Univ. Paris-Sud, Univ. Paris-Saclay, Orsay (France)
  2. Sichuan Univ., Chengdu (China)
  3. Univ. Paris-Sud, Univ. Paris-Saclay, Orsay (France); Univ. of Arizona, Tucson, AZ (United States)

We present a new rearrangement of short-range interactions in the 1S0 nucleon-nucleon channel within chiral effective field theory. This is intended to address the slow convergence of Weinberg’s scheme, which we attribute to its failure to reproduce the amplitude zero (scattering momentum ≃340 MeV) at leading order. After the power counting scheme is modified to accommodate the zero at leading order, it includes subleading corrections perturbatively in a way that is consistent with renormalization-group invariance. Systematic improvement is shown at next-to-leading order, and we obtain results that fit empirical phase shifts remarkably well all the way up to the pion-production threshold. As a result, an approach in which pions have been integrated out is included, which allows us to derive analytic results that also fit phenomenology surprisingly well.

Research Organization:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-04ER41338
OSTI ID:
1419472
Alternate ID(s):
OSTI ID: 1419600
Journal Information:
Physical Review C, Vol. 97, Issue 2; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (2)

Nuclear Structure from the In-Medium Similarity Renormalization Group journal June 2018
Perturbative $NN$ scattering in chiral effective field theory text January 2018

Figures / Tables (7)


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