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Measurement of compton scattering from the deuteron and an improved extraction of the neutron electromagnetic polarizabilities.

Myers, L S; Annand, J R M; Brudvik, Jason LU ; Feldman, G; Fissum, Kevin LU ; Grießhammer, H W; Hansen, Kurt LU ; Henshaw, S S; Isaksson, Lennart LU and Jebali, R, et al. (2014) In Physical Review Letters 113(26).
Abstract
The electromagnetic polarizabilities of the nucleon are fundamental properties that describe its response to external electric and magnetic fields. They can be extracted from Compton-scattering data-and have been, with good accuracy, in the case of the proton. In contradistinction, information for the neutron requires the use of Compton scattering from nuclear targets. Here, we report a new measurement of elastic photon scattering from deuterium using quasimonoenergetic tagged photons at the MAX IV Laboratory in Lund, Sweden. These first new data in more than a decade effectively double the world data set. Their energy range overlaps with previous experiments and extends it by 20 MeV to higher energies. An analysis using chiral effective... (More)
The electromagnetic polarizabilities of the nucleon are fundamental properties that describe its response to external electric and magnetic fields. They can be extracted from Compton-scattering data-and have been, with good accuracy, in the case of the proton. In contradistinction, information for the neutron requires the use of Compton scattering from nuclear targets. Here, we report a new measurement of elastic photon scattering from deuterium using quasimonoenergetic tagged photons at the MAX IV Laboratory in Lund, Sweden. These first new data in more than a decade effectively double the world data set. Their energy range overlaps with previous experiments and extends it by 20 MeV to higher energies. An analysis using chiral effective field theory with dynamical Δ(1232) degrees of freedom shows the data are consistent with and within the world data set. After demonstrating that the fit is consistent with the Baldin sum rule, extracting values for the isoscalar nucleon polarizabilities, and combining them with a recent result for the proton, we obtain the neutron polarizabilities as α_{n}=[11.55±1.25(stat)±0.2(BSR)±0.8(th)]×10^{-4} fm^{3} and β_{n}=[3.65∓1.25(stat)±0.2(BSR)∓0.8(th)]×10^{-4} fm^{3}, with χ^{2}=45.2 for 44 degrees of freedom. (Less)
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Physical Review Letters
volume
113
issue
26
publisher
American Physical Society
external identifiers
  • pmid:25615318
  • wos:000350218000012
  • scopus:84983627518
ISSN
1079-7114
DOI
10.1103/PhysRevLett.113.262506
language
English
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yes
id
761725e9-ae93-4e7a-b1e7-c74c40d0fd1a (old id 5039913)
date added to LUP
2015-02-10 20:55:04
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2017-07-23 03:24:21
@article{761725e9-ae93-4e7a-b1e7-c74c40d0fd1a,
  abstract     = {The electromagnetic polarizabilities of the nucleon are fundamental properties that describe its response to external electric and magnetic fields. They can be extracted from Compton-scattering data-and have been, with good accuracy, in the case of the proton. In contradistinction, information for the neutron requires the use of Compton scattering from nuclear targets. Here, we report a new measurement of elastic photon scattering from deuterium using quasimonoenergetic tagged photons at the MAX IV Laboratory in Lund, Sweden. These first new data in more than a decade effectively double the world data set. Their energy range overlaps with previous experiments and extends it by 20 MeV to higher energies. An analysis using chiral effective field theory with dynamical Δ(1232) degrees of freedom shows the data are consistent with and within the world data set. After demonstrating that the fit is consistent with the Baldin sum rule, extracting values for the isoscalar nucleon polarizabilities, and combining them with a recent result for the proton, we obtain the neutron polarizabilities as α_{n}=[11.55±1.25(stat)±0.2(BSR)±0.8(th)]×10^{-4} fm^{3} and β_{n}=[3.65∓1.25(stat)±0.2(BSR)∓0.8(th)]×10^{-4} fm^{3}, with χ^{2}=45.2 for 44 degrees of freedom.},
  articleno    = {262506},
  author       = {Myers, L S and Annand, J R M and Brudvik, Jason and Feldman, G and Fissum, Kevin and Grießhammer, H W and Hansen, Kurt and Henshaw, S S and Isaksson, Lennart and Jebali, R and Kovash, M A and Lundin, Magnus and McGovern, J A and Middleton, D G and Nathan, A M and Phillips, D R and Schröder, Bent and Stave, S C},
  issn         = {1079-7114},
  language     = {eng},
  number       = {26},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Measurement of compton scattering from the deuteron and an improved extraction of the neutron electromagnetic polarizabilities.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.113.262506},
  volume       = {113},
  year         = {2014},
}