Photoproduction of mesons off nuclei

Krusche, B.

doi:10.1140/epjst/e2011-01491-2

Cited by 52 publications

(62 citation statements)

References 174 publications

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“…Experiments such as Crystal Barrel/TAPS [6,7] at ELSA [8] in Bonn (Germany), the CLAS detector at Jlab in Newport News [9] (USA), the GRAAL facility at ESRF in Grenoble [10] (France), the Crystal Ball/TAPS setup [7,11] at MAMI [12] in Mainz (Germany), the LEPS facility at SPring-8 in Osaka [13] (Japan), and the GeV-γ experiment at LNS at Tohoku University [14] in Sendai (Japan) have dominated this research. A short overview of these experiments is given in [5].…”

Section: Production In γN Reactionsmentioning

confidence: 99%

“…18. In contrast to single meson production, two independent planes can be defined, for example the reaction plane spanned by the inci- 5) where p l is the degree of linear polarization and I s and I c are polarization observables with…”

Section: Photoproduction Of ηπ Pairs Off Nucleonsmentioning

confidence: 99%

“…Earlier articles have surveyed various aspects of the field [1,2,3,4,5], but possibly with not such a wide remit. Our primary thrust will be to discuss physics phenomena rather than the details of theoretical models.…”

Section: Introductionmentioning

confidence: 99%

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Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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Section: Production In γN Reactionsmentioning

confidence: 99%

Section: Photoproduction Of ηπ Pairs Off Nucleonsmentioning

confidence: 99%

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Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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“…Using energytagged bremsstrahlung photons, we currently study Compton scattering γp → pγ to obtain the scalar and vector polarizabilities of protons [1]. Furthermore, we photo-produce mesons and investigate their their mainly uncharged decay channels to test effective field theories and to obtain information about the nucleon excitation spectrum, eventually leading to an unambiguous partial wave analysis [2].…”

Section: The A2 Experiments At Mamimentioning

confidence: 99%

Current Status and Performance of the Crystal Ball and TAPS Calorimeter

Neiser¹

2015

J. Phys.: Conf. Ser.

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Abstract. In the A2 experiment at the Mainz microtron (MAMI) electron accelerator, the production of nucleon resonances and light mesons off protons and nuclei using energy-tagged bremsstrahlung photons is studied. Decay products are measured with two electromagnetic calorimeters: Crystal Ball (CB), whose 672 NaI crystals cover almost the entire solid angle, and TAPS, which consists of 366 BaF2 and 72 PbWO4 crystals in the forward direction. Here, we report on the current performance and status of both detectors after 10 years of operation in Mainz. In addition, we present the new CB high-voltage system, a new fast readout scheme for TAPS, and the planned upgrade of the CB data-acquisition system.

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“…Preliminary results for a first measurement of the latter reaction in quasi-free kinematics using a deuteron target are available from MAMI. The final state invariant mass W has been deduced from the completely determined reaction kinematics as discussed in [25], so that effects from nuclear Fermi motion were eliminated. Total cross sections are compared in Fig.…”

Section: Photoproduction Of O -Mesonsmentioning

confidence: 99%

Latest results from meson photoproduction at ELSA and MAMI

Krusche

2014

EPJ Web of Conferences

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Abstract. Photoproduction of mesons plays a key role for the investigation of the excitation spectrum of the nucleon and thus for our understanding of the strong interaction in the nonperturbative regime. In this contribution we discuss recent results from the experiments at the tagged photon beams of the electron accelerators ELSA in Bonn and MAMI in Mainz. They include the measurement of cross sections and (double) polarization observables for single meson production and production of meson pairs off free protons as well as of quasifree nucleons bound in light nuclei (in particular the deuteron).

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Photoproduction of mesons off nuclei

Cited by 52 publications

References 174 publications

Production of η and η′ mesons on nucleons and nuclei

Production of η and η′ mesons on nucleons and nuclei

Current Status and Performance of the Crystal Ball and TAPS Calorimeter

Latest results from meson photoproduction at ELSA and MAMI

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