Quasi-free compton scattering by the neutron

Rose, K.W.; Zurmühl, B.; Rullhusen, P.; Ludwig, Martin; Baumann, A.; Schumacher, M.; Ahrens, J.; Zieger, A.; Christmann, D.; Ziegler, B.

doi:10.1016/0375-9474(90)90014-d

Cited by 41 publications

(23 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These experiments update the pioneering work of Ref. [22], which was only able to set an upper bound on α n from this process. Ref.…”

Section: Other Techniques For Measuring α Nmentioning

confidence: 99%

“…5(a). It therefore represents Compton scattering on the NN system where the neutron is a spectator while the photon scatters from the proton via the Thomson amplitude (22).…”

Section: Compton Scattering On the Deuteron: Theorymentioning

confidence: 99%

“…In the nuclear case the past decade has seen a set of experiments that establish-for the first time-a modern data set for Compton scattering on the deuteron. Data now exist for coherent γd → γd from 49 to 95 MeV [19,20,21], and for quasi-free γd → γpn from 200 to 400 MeV [22,23,24].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compton scattering on the proton, neutron, and deuteron in chiral perturbation theory to

et al. 2005

View full text Add to dashboard Cite

We study Compton scattering in systems with A=1 and 2 using chiral perturbation theory up to fourth order. For the proton we fit the two undetermined parameters in the O(Q 4 ) γp amplitude of McGovern to experimental data in the region ω, |t| ≤ 180 MeV, obtaining a χ 2 /d.o.f. of 133/113. This yields a modelindependent extraction of proton polarizabilities based solely on low-energy data: α p = (12.1 ± 1.1 (stat.)) +0.5 −0.5 (theory) and β p = (3.4 ± 1.1 (stat.)) +0.1 −0.1 (theory), both in units of 10 −4 fm 3 . We also compute Compton scattering on deuterium to O(Q 4 ). The γd amplitude is a sum of one-and two-nucleon mechanisms, and contains two undetermined parameters, which are related to the isoscalar nucleon polarizabilities. We fit data points from three recent γd scattering experiments with a χ 2 /d.o.f. = 26.6/20, and find α N = (13.0 ± 1.9 (stat.)) +3.9 −1.5 (theory) and a β N that is consistent with zero within sizeable error bars.

show abstract

“…These experiments update the pioneering work of Ref. [22], which was only able to set an upper bound on α n from this process. Ref.…”

Section: Other Techniques For Measuring α Nmentioning

confidence: 99%

“…5(a). It therefore represents Compton scattering on the NN system where the neutron is a spectator while the photon scatters from the proton via the Thomson amplitude (22).…”

Section: Compton Scattering On the Deuteron: Theorymentioning

confidence: 99%

See 1 more Smart Citation

Compton scattering on the proton, neutron, and deuteron in chiral perturbation theory to

et al. 2005

View full text Add to dashboard Cite

show abstract

“…al. depend on a particular treatment of the neutron as a quasi-free particle inside the deuteron and find for inelastic Compton scattering on the deuteron γd → γnp that 1 α (n) = 10.7 +3.3 −10.7 [1]. Since the strong electromagnetic field of a heavy nucleus could enhance small effects from polarisability contributions, neutron scattering off a heavy nucleus is another method employed.…”

mentioning

confidence: 99%

“…Then, the amplitude and cross section is presented. Finally, various fits of the polarisabilities to data 1 In this letter, we express polarisability values in units of 10 −4 fm 3 .…”

mentioning

confidence: 99%

Nucleon polarisabilities from Compton scattering on the deuteron

Grießhammer

Rupak

2002

Physics Letters B

View full text Add to dashboard Cite

An analytic calculation of the differential cross section for elastic Compton scattering on the deuteron at photon energies ω in the range of 25 − 50 MeV is presented to next-to-next-to-leading order, i.e. to an accuracy of ∼ 3%. The calculation is model-independent and performed in the low energy nuclear Effective Field Theory without dynamical pions. The iso-scalar, scalar electric and magnetic nucleon polarisabilities α 0 and β 0 enter as free parameters with a theoretical uncertainty of about 20%. Using data at ω Lab = 49 MeV we find α 0 = 8.4 ± 3.0(exp) ± 1.7(theor), β 0 = 8.9 ± 3.9(exp) ± 1.8(theor), each in units of 10 −4 fm 3 . With the experimental constraint for the iso-scalar Baldin sum rule, α 0 = 7.2 ± 2.1(exp) ± 1.6(theor), β 0 = 6.9 ∓ 2.1(exp) ∓ 1.6(theor). A more accurate result can be achieved by: (i) better experimental data, and (ii) a higher order theoretical calculation including contributions from a couple of so far undetermined four-nucleon-two-photon operators.

show abstract