cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.132014.v1/t71
title: "dcs_70" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1281. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t72
title: "dcs_71" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1293. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t73
title: "dcs_72" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1305. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t74
title: "dcs_73" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1317. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t75
title: "dcs_74" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1328. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t76
title: "dcs_75" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1340. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t77
title: "dcs_76" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1351. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t78
title: "dcs_77" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1362. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t79
title: "dcs_78" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1374. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t80
title: "dcs_79" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity-dependent differential cross section on deuteron at Egamma=1387. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t81
title: "Eprot_01" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity asymmetry E for quasi-free proton at W=1165. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t82
title: "Eprot_02" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity asymmetry E for quasi-free proton at W=1195. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t83
title: "Eprot_03" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity asymmetry E for quasi-free proton at W=1225. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t84
title: "Eprot_04" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity asymmetry E for quasi-free proton at W=1255. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).
DOI: 10.17182/hepdata.132014.v1/t85
title: "Eprot_05" of "Measurement of the helicity dependence for single $\pi^{0}$ photoproduction from the deuteron"

description: Helicity asymmetry E for quasi-free proton at W=1285. MeV
description: A2 Collaboration at MAMI.
The helicity-dependent single $\pi^0$ photoproduction cross section
on the deuteron and the angular dependence of the double
polarisation observable E for the quasi-free single $\pi^0$
production off the proton and the neutron have been measured,
for the first time, from the threshold region up to the photon
energy 1.4 GeV. The experiment was performed at the tagged
photon facility of the MAMI accelerator and used a circularly
polarised photon beam and longitudinally polarised deuteron target.
The reaction products were detected using the large acceptance
Crystal Ball/TAPS calorimeter, which covered 97% of the full solid
angle. Comparing the cross section from the deuteron with the sum
of free nucleon cross sections provides a quantitative estimate of
the effects of the nuclear medium on pion production. In contrast,
comparison of the E helicity asymmetry data from quasi-free
protons off deuterium with data from a free proton target
indicates that nuclear effects do not significantly affect this
observable. As a consequence, it is deduced that the helicity
asymmetry E on a free neutron can be reliably extracted from
measurements on a deuteron in quasi-free kinematics.
Main sources of systematic uncertainties come from the target
polarisation (10%) and from the unpolarised background
subtraction (from 2% up to 10%).