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Publications (15)

nucl-ex2018

Deuteron photodisintegration by polarized photons in the region of the $d^{*} (2380)$

M. Bashkanov, S. Kay, D. P. Watts +70

We report the first large-acceptance measurement of the beam-spin asymmetry for deuteron photodisintegration ( $I^^{3} d \to p n$ ) in the photon energy range $400 < E_{I^}^{3} < 630$ ~MeV. The m…

nucl-ex2023

First measurement of polarisation transfer $C_{x^{'}}^{n}$ in deuteron photodisintegration

M. Bashkanov, D. P. Watts, S. J. D. Kay +66

A first measurement of the polarisation transfer from a circularly-polarised photon to the final state neutron ( $C_{x^{'}}^{n}$ ) in deuterium photodisintegration has been carried out. T…

nucl-ex2015

Measurements of Double-Polarized Compton Scattering Asymmetries and Extraction of the Proton Spin Polarizabilities

P. P. Martel, R. Miskimen, P. Aguar-Bartolome +76

The spin polarizabilities of the nucleon describe how the spin of the nucleon responds to an incident polarized photon. The most model-independent way to measure the nucleon spin p…

nucl-ex2024

First measurement using elliptically polarized photons of the double-polarization observable $E$ for $I^^{3} p \to p I ¨ ^{0}$ and $I^^{3} p \to n I ¨ ^{+}$

A2 Collaboration, F. Afzal, K. Spieker +74

We report the measurement of the helicity asymmetry $E$ for the $p I ¨ ^{0}$ and $n I ¨ ^{+}$ final states using, for the first time, an elliptically polarized photon beam in combination wit…

nucl-ex2022

Measurement of the helicity dependence for single $I ¨ ^{0}$ photoproduction from the deuteron

The A2 collaboration, F. Cividini, M. Dieterle +72

The helicity-dependent single $I ¨ ^{0}$ photoproduction cross section on the deuteron and the angular dependence of the double polarisation observable $E$ for the quasi-free single…

nucl-ex2018

Photoproduction of {\boldmath{ $I ¨ ^{0}$ }} Mesons off Protons and Neutrons in the Second and Third Nucleon Resonance Region

M. Dieterle, D. WerthmÃ¼ller, S. Abt +81

Photoproduction of mesons off quasi-free nucleons bound in the deuteron allows to study the electromagnetic excitation spectrum of the neutron and the isospin structure of the exci…

nucl-ex2015

First measurement of target and beam-target asymmetries in the $I^^{3} p \to I ¨ ^{0} I^\cdot p$ reaction

J. R. M. Annand, H. J. Arends, R. Beck +64

The first data on target and beam-target asymmetries for the $I^^{3} p \to I ¨ ^{0} I^\cdot p$ reaction at photon energies from 1050 up to 1450 MeV are presented. The measurements were performed usi…

nucl-ex2022

Neutron polarisation transfer, $C_{x^{'}}^{n}$ , in $I ¨ ^{+}$ photoproduction off the proton

M. Bashkanov, D. P. Watts, S. J. D. Kay +63

We report a first measurement of the double-polarisation observable, $C_{x^{'}}$ , in $I ¨ ^{+}$ photoproduction off the proton. The $C_{x^{'}}$ double-polarisation observable represents the…

nucl-ex2017

Determination of the scalar polarizabilities of the proton using beam asymmetry $I^£_{3}$ in Compton scattering

V. Sokhoyan, E. J. Downie, E. Mornacchi +73

The scalar dipole polarizabilities, $I^\pm_{E 1}$ and $I^_{M 1}^{2}$ , are fundamental properties related to the internal dynamics of the nucleon. The currently accepted values of the proton…

nucl-ex2026

Measurement of the Gerasimov-Drell-Hearn integrand for proton and deuteron from 200 to 1400 MeV

P. Pedroni, F. Afzal, S. Abt +59

New data for the total inclusive helicity-dependent cross section for the proton and deuteron were obtained in the photon energy interval 200-1400 MeV. The experiment was performed…

nucl-ex2020

Helicity-dependent cross sections for the photoproduction of $I ¨ ^{0}$ pairs from nucleons

M. Dieterle, L. Witthauer, A. Fix +88

The double-polarization observable $E$ and helicity-dependent cross sections $I ¨ _{1/2}$ , $I ¨ _{3/2}$ have been measured for the photoproduction of $I ¨ ^{0}$ pairs off quasi-free proton…

hep-ex2018

Measurement of the decay $I^\cdot^{'} \to I ¨ ^{0} I ¨ ^{0} I^\cdot$ at MAMI

P. Adlarson, F. Afzal, C. S. Akondi +75

An experimental study of the $I^\cdot^{'} \to I ¨ ^{0} I ¨ ^{0} I^\cdot \to 6 I^^{3}$ decay has been conducted with the best up-to-date statistical accuracy, by measuring $I^\cdot^{'}$ mesons produced in the $Î³p \to Î…

nucl-ex2019

Signatures of the $d^{*} (2380)$ hexaquark in d( $I^^{3}$ , $p n$ )

M. Bashkanov, D. P. Watts, S. J. D. Kay +74

We report a measurement of the spin polarisation of the recoiling neutron in deuterium photodisintegration, utilising a new large acceptance polarimeter within the Crystal Ball at…

hep-ex2014

A new measurement of the rare decay eta -> pi^0 gamma gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

A new measurement of the rare, doubly radiative decay eta->pi^0 gamma gamma was conducted with the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging…

nucl-ex2022

Measurement of Compton scattering at MAMI for the extraction of the electric and magnetic polarizabilities of the proton

A2 Collaboration, E. Mornacchi, P. P. Martel +65

A precise measurement of the differential cross-sections $d I ¨ / d I^c ◯$ and the linearly polarized photon beam asymmetry $I^£_{3}$ for Compton scattering on the proton below pion threshold…

Publications (15)

Deuteron photodisintegration by polarized photons in the region of the d∗(2380)

First measurement of polarisation transfer Cx′n​ in deuteron photodisintegration

Measurements of Double-Polarized Compton Scattering Asymmetries and Extraction of the Proton Spin Polarizabilities

First measurement using elliptically polarized photons of the double-polarization observable E for I^3p→pI¨0 and I^3p→nI¨+

Measurement of the helicity dependence for single I¨0 photoproduction from the deuteron

Photoproduction of {\boldmath{I¨0}} Mesons off Protons and Neutrons in the Second and Third Nucleon Resonance Region

First measurement of target and beam-target asymmetries in the I^3p→I¨0I^⋅p reaction

Neutron polarisation transfer, Cx′n​, in I¨+ photoproduction off the proton

Determination of the scalar polarizabilities of the proton using beam asymmetry I^£3​ in Compton scattering

Measurement of the Gerasimov-Drell-Hearn integrand for proton and deuteron from 200 to 1400 MeV

Helicity-dependent cross sections for the photoproduction of I¨0 pairs from nucleons

Measurement of the decay I^⋅′→I¨0I¨0I^⋅ at MAMI

Signatures of the d∗(2380) hexaquark in d(I^3,pn)

A new measurement of the rare decay eta -> pi^0 gamma gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

Measurement of Compton scattering at MAMI for the extraction of the electric and magnetic polarizabilities of the proton

Deuteron photodisintegration by polarized photons in the region of the $d^{*} (2380)$

First measurement of polarisation transfer $C_{x^{'}}^{n}$ in deuteron photodisintegration

First measurement using elliptically polarized photons of the double-polarization observable $E$ for $I^^{3} p \to p I ¨ ^{0}$ and $I^^{3} p \to n I ¨ ^{+}$

Measurement of the helicity dependence for single $I ¨ ^{0}$ photoproduction from the deuteron

Photoproduction of {\boldmath{ $I ¨ ^{0}$ }} Mesons off Protons and Neutrons in the Second and Third Nucleon Resonance Region

First measurement of target and beam-target asymmetries in the $I^^{3} p \to I ¨ ^{0} I^\cdot p$ reaction

Neutron polarisation transfer, $C_{x^{'}}^{n}$ , in $I ¨ ^{+}$ photoproduction off the proton

Determination of the scalar polarizabilities of the proton using beam asymmetry $I^£_{3}$ in Compton scattering

Helicity-dependent cross sections for the photoproduction of $I ¨ ^{0}$ pairs from nucleons

Measurement of the decay $I^\cdot^{'} \to I ¨ ^{0} I ¨ ^{0} I^\cdot$ at MAMI

Signatures of the $d^{*} (2380)$ hexaquark in d( $I^^{3}$ , $p n$ )