H. J. Arends

Johannes Gutenberg University Mainz

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R. Beck

University of Bonn

P. Pedroni

Istituto Nazionale di Fisica Nucleare, Sezione di Pavia

B. Krusche

University of Basel

V. Lisin

Russian Academy of Sciences

R. Kondratiev

Institute for Nuclear Research

I. J. D. MacGregor

University of Glasgow

V. L. Kashevarov

Johannes Gutenberg University Mainz

T. Rostomyan

University of Basel

A. Braghieri

Istituto Nazionale di Fisica Nucleare, Sezione di Pavia

W. J. Briscoe

George Washington University

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Johannes Gutenberg University Mainz

183

Crystal Research (United States)

University of Basel

University of Glasgow

George Washington University

University of Bonn

Thomas Jefferson National Accelerator Facility

University of Giessen

University of Edinburgh

Max Planck Institute for Nuclear Physics

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Recent results from MAMI

AIP conference proceedings (2011)

H. J. Arends David Armstrong Volker Burkert Jianping Chen William Detmold

The Mainz Microtron MAMI is an ideal facility to study the hadron structure with the electromagnetic probe. With the new accelerator stage (HDSM), which went into operation in 2007, high‐intensity polarized electron and photon beams with energies up to 1.6 GeV are delivered to the experiments. Polarized targets and recoil polarimeters in combination with dedicated detectors are available for precision experiments in hadron physics. In this article, an overview over selected recent results is given.

Microtron

Recoil

10.1063/1.3647093

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Photoemission of protons from 4He in the ⊿-resonance region

Zeitschrift für Physik A Hadrons and Nuclei (1996)

R. Wichmann J. Ahrens H. J. Arends R. Beck G. Galler

Photodisintegration

Photon energy

10.1007/s002180050095

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Test of Low-Energy Theorems for 1H(gamma-vector , pi0)1H in the Threshold Region

P. Achenbach J. Ahrens H. J. Arends Relja Beck A. Schmidt

10.17877/de290r-4542

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Scattering of photons by the proton through θcms = 90° in the Δ-resonance region

Physics Letters B (1996)

C. Molinari P. Ottonello A. Robbiano M. Sanzone A. Zucchiatti

Recoil

Scattering cross-section

10.1016/0370-2693(96)00020-2

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Citations (32)

Measurement of the helicity dependence for theγp→nπ+channel in the second resonance region

Physical Review C (2006)

J. Ahrens S. Altieri J. R. M. Annand H. J. Arends R. Beck

The helicity dependence of the γp→nπ+ reaction has been measured for the first time in the photon energy range from 450 to 790 MeV. The experiment, performed at the Mainz Microtron (MAMI), used a 4π-detector system, a circularly polarized, tagged photon beam, and a longitudinally polarized frozen-spin target. Although these polarized data are mainly sensitive to mechanisms involving the D13(1520) resonance, a cusp structure at the η production threshold can be clearly observed. These data are significantly different from the predictions of the existing multipole analyses and are used to determine the helicity amplitudes of the D13(1520) and S11(1535) resonances with improved accuracy.8 MoreReceived 24 January 2006DOI:https://doi.org/10.1103/PhysRevC.74.045204©2006 American Physical Society

Helicity

10.1103/physrevc.74.045204

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Measurement of theH1(γ⃗, p⃗)π0

Physical Review Letters (2014)

M. H. Sikora D. P. Watts D. I. Glazier P. Aguar-Bartolomé L. K. Akasoy

We report the first large-acceptance measurement of polarization transfer from a polarized photon beam to a recoiling nucleon. The measurement pioneers a novel polarimetry technique, which can be applied to many other nuclear and hadron physics experiments. The commissioning reaction of 1H(γ, p)π0 in the range 0.4

10.1103/physrevlett.112.022501

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Citations (26)

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

Physics Letters B (2018)

M. Bashkanov S. Kay D. P. Watts C. Mullen S. Abt

We report the first large-acceptance measurement of the beam-spin asymmetry for deuteron photodisintegration ($\vec{\gamma} d\to pn$) in the photon energy range $400

Photodisintegration

Photofission

Photon energy

10.1016/j.physletb.2018.12.026

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Citations (14)

Coherent and incoherent π0 photoproduction from the deuteron

The European Physical Journal A (2001)

U. Siodlaczek P. Achenbach J. Ahrens J. R. M. Annand H. J. Arends

Photon energy

Missing energy

10.1007/s100500170120

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Citations (37)

Resonance Structure with Polarization Experiments at MAMI

AIP conference proceedings (2011)

H. J. Arends Atsushi Hosaka Kanchan Khemchandani Hideko Nagahiro Kanabu Nawa

The Mainz Microtron MAMI is an ideal facility to study the hadron structure with the electromagnetic probe. With the new accelerator stage, the Harmonic Double‐Sided Microtron (HDSM), which is in operation since 2007, high‐intensity polarized electron and photon beams with energies up to 1.6 GeV are delivered to the experiments. Polarized proton, deuteron, 3He targets, and recoil proton polarimeters are available to allow a broad range of polarization observables for low‐mass nucleon resonances to be measured. In this talk, an overview over selected recent double polarization experiments at MAMI is given.

Microtron

Recoil

10.1063/1.3647416

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Measurement of the G asymmetry for the γp↦Nπ channels in the Δ(1232) resonance region

The European Physical Journal A (2005)

J. Ahrens S. Altieri J. R. M. Annand H. J. Arends R. Beck

Microtron

10.1140/epja/i2005-10158-3

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Citations (20)