Remarks on the pion–nucleon σ-term

Hoferichter, Martin; Ruiz de Elvira, Jacobo; Kubis, Bastian; Meißner, Ulf-G.

doi:10.1016/j.physletb.2016.06.038

Title: Remarks on the pion–nucleon σ-term

Journal Article · Thu Sep 01 00:00:00 EDT 2016 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2016.06.038· OSTI ID:1259355

Hoferichter, Martin; Ruiz de Elvira, Jacobo; Kubis, Bastian; Meißner, Ulf-G.

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.

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Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-00ER41132

OSTI ID:: 1259355

Alternate ID(s):: OSTI ID: 1361205

Journal Information:: Physics Letters B, Journal Name: Physics Letters B Vol. 760 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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Cited by: 42 works

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Cited By (13)

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Chiral symmetry restoration in heavy-ion collisions at intermediate energies Palmese, A.; Cassing, W.; Seifert, E. Physical Review C, Vol. 94, Issue 4 https://doi.org/10.1103/physrevc.94.044912	journal	October 2016
$π N$ and strangeness sigma terms at the physical point with chiral fermions Yang, Yi-Bo; Alexandru, Andrei; Draper, Terrence Physical Review D, Vol. 94, Issue 5 https://doi.org/10.1103/physrevd.94.054503	journal	September 2016
Analysis strategies for general spin-independent WIMP-nucleus scattering Hoferichter, Martin; Klos, Philipp; Menéndez, Javier Physical Review D, Vol. 94, Issue 6 https://doi.org/10.1103/physrevd.94.063505	journal	September 2016
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Electric dipole moment of ${}^{199}{Hg}$ atom from $P$ , $C P$ -odd electron-nucleon interaction Yanase, K.; Yoshinaga, N.; Higashiyama, K. Physical Review D, Vol. 99, Issue 7 https://doi.org/10.1103/physrevd.99.075021	journal	April 2019
Improved Limits for Higgs-Portal Dark Matter from LHC Searches Hoferichter, Martin; Klos, Philipp; Menéndez, Javier Physical Review Letters, Vol. 119, Issue 18 https://doi.org/10.1103/physrevlett.119.181803	journal	October 2017
On the $\pi\pi$ π π continuum in the nucleon form factors and the proton radius puzzle Hoferichter, M.; Kubis, B.; Ruiz de Elvira, J. The European Physical Journal A, Vol. 52, Issue 11 https://doi.org/10.1140/epja/i2016-16331-7	journal	November 2016

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