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Title: Remarks on the pion–nucleon σ-term

Abstract

The pion–nucleon σ-term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion–nucleon scattering lengths. Recently, lattice calculations at the physical point have been reported that find lower values by about 3σ with respect to the phenomenological determination. As a result, we point out that a lattice measurement of the pion–nucleon scattering lengths could help resolve the situation by testing the values extracted from spectroscopy measurements in pionic atoms.

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1259355
Alternate Identifier(s):
OSTI ID: 1361205
Grant/Contract Number:  
FG02-00ER41132
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 760 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; pion–baryon interactions; dispersion relations; Chiral Lagrangians; Chiral symmetries

Citation Formats

Hoferichter, Martin, Ruiz de Elvira, Jacobo, Kubis, Bastian, and Meißner, Ulf-G. Remarks on the pion–nucleon σ-term. Netherlands: N. p., 2016. Web. doi:10.1016/j.physletb.2016.06.038.
Hoferichter, Martin, Ruiz de Elvira, Jacobo, Kubis, Bastian, & Meißner, Ulf-G. Remarks on the pion–nucleon σ-term. Netherlands. doi:10.1016/j.physletb.2016.06.038.
Hoferichter, Martin, Ruiz de Elvira, Jacobo, Kubis, Bastian, and Meißner, Ulf-G. Thu . "Remarks on the pion–nucleon σ-term". Netherlands. doi:10.1016/j.physletb.2016.06.038.
@article{osti_1259355,
title = {Remarks on the pion–nucleon σ-term},
author = {Hoferichter, Martin and Ruiz de Elvira, Jacobo and Kubis, Bastian and Meißner, Ulf-G.},
abstractNote = {The pion–nucleon σ-term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion–nucleon scattering lengths. Recently, lattice calculations at the physical point have been reported that find lower values by about 3σ with respect to the phenomenological determination. As a result, we point out that a lattice measurement of the pion–nucleon scattering lengths could help resolve the situation by testing the values extracted from spectroscopy measurements in pionic atoms.},
doi = {10.1016/j.physletb.2016.06.038},
journal = {Physics Letters B},
number = C,
volume = 760,
place = {Netherlands},
year = {2016},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2016.06.038

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Cited by: 16 works
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