Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons

Witthauer, L.; Dieterle, M.; Abt, S.; Achenbach, P.; Afzal, F.; Ahmed, Z.; Akondi, C. S.; Annand, J. R. M.; Arends, H. J.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cividini, F.; Costanza, S.; Collicott, C.; Denig, A.; Downie, E. J.; Drexler, P.; Ferretti-Bondy, M. I.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Günther, M.; Gurevich, G. M.; Hamilton, D.; Hornidge, D.; Huber, G. M.; Käser, A.; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev, A. B.; Linturi, J. M.; Lisin, V.; Livingston, K.; Lutterer, S.; MacGregor, I. J. D.; Mancell, J.; Manley, D. M.; Martel, P. P.; Metag, V.; Meyer, W.; Miskimen, R.; Mornacchi, E.; Mushkarenkov, A.; Neganov, A. B.; Neiser, A.; Oberle, M.; Ostrick, M.; Otte, P. B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S. N.; Rajabi, A.; Reicherz, G.; Ron, G.; Rostomyan, T.; Sarty, A.; Sfienti, C.; Sikora, M. H.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strub, Th.; Supek, I.; Thiel, A.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu. A.; Wagner, S.; Walford, N. K.; Watts, D. P.; Werthmüller, D.; Wettig, J.; Wolfes, M.; Zana, L.

doi:10.1103/PhysRevC.95.055201

Title: Helicity-dependent cross sections and double-polarization observable $E$ in $η$ photoproduction from quasifree protons and neutrons

Abstract

Precise helicity-dependent cross sections and the double-polarization observable E were measured for η photoproduction from quasifree protons and neutrons bound in the deuteron. The η → 2γ and η → 3π⁰ → 6γ decay modes were used to optimize the statistical quality of the data and to estimate systematic uncertainties. The measurement used the A2 detector setup at the tagged photon beam of the electron accelerator MAMI in Mainz. A longitudinally polarized deuterated butanol target was used in combination with a circularly polarized photon beam from bremsstrahlung of a longitudinally polarized electron beam. The reaction products were detected with the electromagnetic calorimeters Crystal Ball and TAPS, which covered 98% of the full solid angle. The results show that the narrow structure observed earlier in the unpolarized excitation function of η photoproduction off the neutron appears only in reactions with antiparallel photon and nucleon spin (σ_1/2). It is absent for reactions with parallel spin orientation (σ_3/2) and thus very probably related to partial waves with total spin 1/2. The behavior of the angular distributions of the helicity-dependent cross sections was analyzed by fitting them with Legendre polynomials. The results are in good agreement with a model from the Bonn-Gatchina group, whichmore »« less

Authors:: Witthauer, L.; Dieterle, M.; Abt, S.; Achenbach, P.; Afzal, F.; Ahmed, Z.; Akondi, C. S.; Annand, J. R. M.; Arends, H. J.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cividini, F.; Costanza, S.; Collicott, C.; Denig, A.; Downie, E. J. more »« less

Publication Date:: Mon May 01 00:00:00 EDT 2017

Research Org.:: Univ. of Massachusetts, Amherst, MA (United States); George Washington Univ., Washington, DC (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); German Research Foundation (DFG); Science and Technology Facilities Council (STFC) (United Kingdom); Natural Sciences and Engineering Research Council of Canada (NSERC); National Science Foundation (NSF)

Contributing Org.:: A2 Collaboration at MAMI

OSTI Identifier:: 1354757

Alternate Identifier(s):: OSTI ID: 1425343; OSTI ID: 1439805

Grant/Contract Number:: FG02-99-ER41110; FG02-88ER40415; FG02-01ER41194; FG02-99ER41110; 227431; PHY-1039130; SC0016583

Resource Type:: Published Article

Journal Name:: Physical Review. C

Additional Journal Information:: Journal Name: Physical Review. C Journal Volume: 95 Journal Issue: 5; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 74 ATOMIC AND MOLECULAR PHYSICS; Particles & Fields; Nuclear Physics; protons; Helicities

Citation Formats


                    Witthauer, L., Dieterle, M., Abt, S., Achenbach, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R. M., Arends, H. J., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cividini, F., Costanza, S., Collicott, C., Denig, A., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Günther, M., Gurevich, G. M., Hamilton, D., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A. B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Mancell, J., Manley, D. M., Martel, P. P., Metag, V., Meyer, W., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Neganov, A. B., Neiser, A., Oberle, M., Ostrick, M., Otte, P. B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S. N., Rajabi, A., Reicherz, G., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sikora, M. H., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, Th., Supek, I., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Wagner, S., Walford, N. K., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Zana, L., and A2 Collaboration at MAMI. Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevC.95.055201.

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                    Witthauer, L., Dieterle, M., Abt, S., Achenbach, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R. M., Arends, H. J., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cividini, F., Costanza, S., Collicott, C., Denig, A., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Günther, M., Gurevich, G. M., Hamilton, D., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A. B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Mancell, J., Manley, D. M., Martel, P. P., Metag, V., Meyer, W., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Neganov, A. B., Neiser, A., Oberle, M., Ostrick, M., Otte, P. B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S. N., Rajabi, A., Reicherz, G., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sikora, M. H., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, Th., Supek, I., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Wagner, S., Walford, N. K., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Zana, L., & A2 Collaboration at MAMI. Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons.  United States.  https://doi.org/10.1103/PhysRevC.95.055201

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                    Witthauer, L., Dieterle, M., Abt, S., Achenbach, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R. M., Arends, H. J., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cividini, F., Costanza, S., Collicott, C., Denig, A., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Günther, M., Gurevich, G. M., Hamilton, D., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A. B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Mancell, J., Manley, D. M., Martel, P. P., Metag, V., Meyer, W., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Neganov, A. B., Neiser, A., Oberle, M., Ostrick, M., Otte, P. B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S. N., Rajabi, A., Reicherz, G., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sikora, M. H., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, Th., Supek, I., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Wagner, S., Walford, N. K., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Zana, L., and A2 Collaboration at MAMI. Mon .  
"Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons".  United States.  https://doi.org/10.1103/PhysRevC.95.055201.

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@article{osti_1354757,

  title        = {Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons},

  author       = {Witthauer, L. and Dieterle, M. and Abt, S. and Achenbach, P. and Afzal, F. and Ahmed, Z. and Akondi, C. S. and Annand, J. R. M. and Arends, H. J. and Bashkanov, M. and Beck, R. and Biroth, M. and Borisov, N. S. and Braghieri, A. and Briscoe, W. J. and Cividini, F. and Costanza, S. and Collicott, C. and Denig, A. and Downie, E. J. and Drexler, P. and Ferretti-Bondy, M. I. and Gardner, S. and Garni, S. and Glazier, D. I. and Glowa, D. and Gradl, W. and Günther, M. and Gurevich, G. M. and Hamilton, D. and Hornidge, D. and Huber, G. M. and Käser, A. and Kashevarov, V. L. and Kay, S. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Krusche, B. and Lazarev, A. B. and Linturi, J. M. and Lisin, V. and Livingston, K. and Lutterer, S. and MacGregor, I. J. D. and Mancell, J. and Manley, D. M. and Martel, P. P. and Metag, V. and Meyer, W. and Miskimen, R. and Mornacchi, E. and Mushkarenkov, A. and Neganov, A. B. and Neiser, A. and Oberle, M. and Ostrick, M. and Otte, P. B. and Paudyal, D. and Pedroni, P. and Polonski, A. and Prakhov, S. N. and Rajabi, A. and Reicherz, G. and Ron, G. and Rostomyan, T. and Sarty, A. and Sfienti, C. and Sikora, M. H. and Sokhoyan, V. and Spieker, K. and Steffen, O. and Strakovsky, I. I. and Strub, Th. and Supek, I. and Thiel, A. and Thiel, M. and Thomas, A. and Unverzagt, M. and Usov, Yu. A. and Wagner, S. and Walford, N. K. and Watts, D. P. and Werthmüller, D. and Wettig, J. and Wolfes, M. and Zana, L. and A2 Collaboration at MAMI},

  abstractNote = {Precise helicity-dependent cross sections and the double-polarization observable E were measured for η photoproduction from quasifree protons and neutrons bound in the deuteron. The η → 2γ and η → 3π0 → 6γ decay modes were used to optimize the statistical quality of the data and to estimate systematic uncertainties. The measurement used the A2 detector setup at the tagged photon beam of the electron accelerator MAMI in Mainz. A longitudinally polarized deuterated butanol target was used in combination with a circularly polarized photon beam from bremsstrahlung of a longitudinally polarized electron beam. The reaction products were detected with the electromagnetic calorimeters Crystal Ball and TAPS, which covered 98% of the full solid angle. The results show that the narrow structure observed earlier in the unpolarized excitation function of η photoproduction off the neutron appears only in reactions with antiparallel photon and nucleon spin (σ1/2). It is absent for reactions with parallel spin orientation (σ3/2) and thus very probably related to partial waves with total spin 1/2. The behavior of the angular distributions of the helicity-dependent cross sections was analyzed by fitting them with Legendre polynomials. The results are in good agreement with a model from the Bonn-Gatchina group, which uses an interference of P11 and S11 partial waves to explain the narrow structure.},

  doi          = {10.1103/PhysRevC.95.055201},

  journal      = {Physical Review. C},

  number       = 5,

  volume       = 95,

  place        = {United States},

  year         = {Mon May 01 00:00:00 EDT 2017},

  month        = {Mon May 01 00:00:00 EDT 2017}

}

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A new <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>N</mml:mi><mml:mo>∗</mml:mo></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:mn>1675</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> resonance in the <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>γ</mml:mi><mml:mi>N</mml:mi><mml:mo>→</mml:mo><mml:mi>η</mml:mi><mml:mi>N</mml:mi></mml:math> reaction
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Choi, Ki-Seok; Nam, Seung-Il; Hosaka, Atsushi
Physics Letters B, Vol. 636, Issue 5
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Photoproduction of $\eta$ $\pi$ pairs off nucleons and deuterons
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Käser, A.; Müller, F.; Ahrens, J.
The European Physical Journal A, Vol. 52, Issue 9
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Partial-wave analysis of the $π^{-} p$ $\to$ $η n$ and $π^{-} p \to K^{0} Λ$ reactions
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Shrestha, M.; Manley, D. M.
Physical Review C, Vol. 86, Issue 4
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First measurement of the helicity asymmetry E in photoproduction on the proton
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Senderovich, I.; Morrison, B. T.; Dugger, M.
Physics Letters B, Vol. 755
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Parametrization of the deuteron wave function of the Paris NN potential
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Lacombe, M.; Loiseau, B.; Mau, R. Vinh
Physics Letters B, Vol. 101, Issue 3
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Measurement of $K^{-} \vec{p} η Λ$ near threshold
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Starostin, A.; Nefkens, B. M. K.; Berger, E.
Physical Review C, Vol. 64, Issue 5
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Near threshold photoproduction of η-mesons from complex nuclei
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Röbig-Landau, M.; Ahrens, J.; Anton, G.
Physics Letters B, Vol. 373, Issue 1-3
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Narrow Resonance at E _γ = 1020 MeV in the D (γ,η) p n Reaction
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Miyahara, F.; Kasagi, J.; Nakabayashi, T.
Progress of Theoretical Physics Supplement, Vol. 168
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Differential cross sections for the reactions $γ p \to p η$ and $γ p \to p η^{'}$
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Williams, M.; Krahn, Z.; Applegate, D.
Physical Review C, Vol. 80, Issue 4
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New Measurement of $Σ$ Beam Asymmetry for $η$ Meson Photoproduction on the Proton
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Ajaka, J.; Anghinolfi, M.; Bellini, V.
Physical Review Letters, Vol. 81, Issue 9
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Quasi-free photoproduction of η-mesons off 3He nuclei
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Witthauer, L.; Werthmüller, D.; Keshelashvili, I.
The European Physical Journal A, Vol. 49, Issue 12
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Photoproduction of $η$ mesons within a coupled-channels $K$ -matrix approach
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Shyam, R.; Scholten, O.
Physical Review C, Vol. 78, Issue 6
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Photoproduction of η -mesons off protons
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Bartholomy, O.; Bogendörfer, R.; Credé, V.
The European Physical Journal A, Vol. 33, Issue 2
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A new frozen-spin target for 4π particle detection
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Bradtke, Ch; Dutz, H.; Peschel, H.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 436, Issue 3
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Constraining N∗(1535) parameters from the eta photoproduction
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Krusche, B.; Mukhopadhyay, Nimai C.; Zhang, J. -F
Physics Letters B, Vol. 397, Issue 3-4
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Photoproduction of η -mesons off nuclei for Eγ ⩽ 2.2 GeV
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Mertens, T.; Jaegle, I.; Mühlich, P.
The European Physical Journal A, Vol. 38, Issue 2
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The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles
journal, September 2016

Anisovich, A. V.; Beck, R.; Döring, M.
The European Physical Journal A, Vol. 52, Issue 9
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On photoexcitation of baryon antidecuplet
journal, December 2003

Polyakov, M. V.; Rathke, A.
The European Physical Journal A, Vol. 18, Issue 4
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The 1.5GeV harmonic double-sided microtron at Mainz University
journal, August 2008

Kaiser, K. -H.; Aulenbacher, K.; Chubarov, O.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 593, Issue 3
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Insight into the Narrow Structure in $η$ Photoproduction on the Neutron from Helicity-Dependent Cross Sections
journal, September 2016

Witthauer, L.; Dieterle, M.; Abt, S.
Physical Review Letters, Vol. 117, Issue 13
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Effective densities and polarizations of the targets for the GDH-experiments at MAMI and ELSA
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Rohlof, Ch.; Dutz, H.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 526, Issue 1-2
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Nonstrange and other flavor partners of the exotic $Θ^{+}$ baryon
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Arndt, R. A.; Azimov, Ya. I.; Polyakov, M. V.
Physical Review C, Vol. 69, Issue 3
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Measurement of the beam-helicity asymmetry <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>I</mml:mi></mml:mrow><mml:mrow><mml:mo>⊙</mml:mo></mml:mrow></mml:msup></mml:math> in the photoproduction of <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:math>-pairs off the proton and off the neutron
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Oberle, M.; Krusche, B.; Ahrens, J.
Physics Letters B, Vol. 721, Issue 4-5
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The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region
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Käser, A.; Ahrens, J.; Annand, J. R. M.
Physics Letters B, Vol. 748
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A focal plane system for the 855 MeV tagged photon spectrometer at MAMI-B
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Hall, S. J.; Miller, G. J.; Beck, R.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 368, Issue 3
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Status Report on the Normal Conducting CW Racetrack Microtron Cascade "MAMI"
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Herminghaus, H.; Dreher, B.; Futeneuer, B.
IEEE Transactions on Nuclear Science, Vol. 30, Issue 4
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Measurement of the Transverse Target and Beam-Target Asymmetries in $η$ Meson Photoproduction at MAMI
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Akondi, C. S.; Annand, J. R. M.; Arends, H. J.
Physical Review Letters, Vol. 113, Issue 10
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Evidence for narrow resonant structures at $W \approx 1.68 GeV$ and $W \approx 1.72 GeV$ in real Compton scattering off the proton
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Kuznetsov, V.; Mammoliti, F.; Bellini, V.
Physical Review C, Vol. 91, Issue 4
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Comment on “Evidence for narrow resonant structures at $W \approx 1.68$ GeV and $W \approx 1.72$ GeV in real Compton scattering off the proton”
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Werthmüller, D.; Witthauer, L.; Glazier, D. I.
Physical Review C, Vol. 92, Issue 6
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Interference phenomena in the JP = 1/2− wave in η photoproduction
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Anisovich, A. V.; Klempt, E.; Krusche, B.
The European Physical Journal A, Vol. 51, Issue 6
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An isobar model for η photo- and electroproduction on the nucleon
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Chiang, Wen-Tai; Yang, Shin Nan; Tiator, Lothar
Nuclear Physics A, Vol. 700, Issue 1-2
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Photon and Electron Polarization in High-Energy Bremsstrahlung and Pair Production with Screening
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Olsen, Haakon; Maximon, L. C.
Physical Review, Vol. 114, Issue 3
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Measurement of the beam asymmetry in η photoproduction off the proton
journal, August 2007

Elsner, D.; Anisovich, A. V.; Anton, G.
The European Physical Journal A, Vol. 33, Issue 2
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Near Threshold Photoproduction of $η$ Mesons off the Proton
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Krusche, B.; Ahrens, J.; Anton, G.
Physical Review Letters, Vol. 74, Issue 19
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Geant4—a simulation toolkit
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Agostinelli, S.; Allison, J.; Amako, K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
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Quasifree Photoproduction of $η$ Mesons off the Neutron
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Jaegle, I.; Mertens, T.; Anisovich, A. V.
Physical Review Letters, Vol. 100, Issue 25
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η photoproduction in the resonance energy region
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Shklyar, V.; Lenske, H.; Mosel, U.
Physics Letters B, Vol. 650, Issue 2-3
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Photoproduction of $ \pi^{0}$ -pairs off protons and off neutrons
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Dieterle, M.; Oberle, M.; Ahrens, J.
The European Physical Journal A, Vol. 51, Issue 11
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Title: Helicity-dependent cross sections and double-polarization observable E in η photoproduction from quasifree protons and neutrons

Abstract

Citation Formats

Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of $ \pi^{0}$ $ \pi^{\pm}$ pairs off protons and off neutrons journal, March 2014

Review of Particle Physics journal, October 2016

Quasifree photoproduction of η mesons off protons and neutrons journal, July 2014

Multichannel parametrization of π N scattering amplitudes and extraction of resonance parameters journal, November 2012

Design of a tagged photon spectrometer for use with the Mainz 840 MeV microtron journal, March 1991

Response of TAPS to monochromatic photons with energies between 45 and 790 MeV journal, July 1994

Review of Particle Physics journal, August 2014

Study of non-strange baryon resonances with meson photoproduction journal, January 2003

The BaF/sub 2/ photon spectrometer TAPS journal, April 1991

Measurement of η photoproduction on the proton from threshold to 1500 MeV journal, August 2007

The Mainz microtron facility MAMI journal, January 1990

Photoproduction of η -mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) -resonance journal, June 2007

Narrow Structure in the Excitation Function of η Photoproduction off the Neutron journal, December 2013

Photoproductionof η Mesonsoff Protons for 0.75 G e V < E γ < 3 G e V journal, January 2005

Differential cross section measurement of η photoproduction on the proton from threshold to 1100 MeV journal, March 2002

Quasi-free photoproduction of η-mesons off the deuteron journal, August 2011

A Mott polarimeter operating at MeV electron beam energies journal, March 2011

η Photoproduction on the Proton for Photon Energies from 0.75 to 1.95 GeV journal, November 2002

Complete experiments in pseudoscalar photoproduction journal, September 1975

Experimental study of the γ p → η p reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C) journal, September 2010

Photoproduction of η and η ' mesons off protons journal, November 2009

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C journal, June 2008

Photoproduction of $\eta$ $\pi$ pairs off nucleons and deuterons journal, September 2016

Partial-wave analysis of the π − p → η n and π − p → K 0 Λ reactions journal, October 2012

First measurement of the helicity asymmetry E in photoproduction on the proton journal, April 2016

Parametrization of the deuteron wave function of the Paris NN potential journal, May 1981

Measurement of K − p → η Λ near threshold journal, October 2001

Near threshold photoproduction of η-mesons from complex nuclei journal, April 1996

Narrow Resonance at E γ = 1020 MeV in the D (γ,η) p n Reaction journal, January 2007

Differential cross sections for the reactions γ p → p η and γ p → p η ' journal, October 2009

New Measurement of Σ Beam Asymmetry for η Meson Photoproduction on the Proton journal, August 1998

Quasi-free photoproduction of η-mesons off 3He nuclei journal, December 2013

Photoproduction of η mesons within a coupled-channels K -matrix approach journal, December 2008

Photoproduction of η -mesons off protons journal, August 2007

A new frozen-spin target for 4π particle detection journal, November 1999

Constraining N∗(1535) parameters from the eta photoproduction journal, April 1997

Photoproduction of η -mesons off nuclei for Eγ ⩽ 2.2 GeV journal, October 2008

The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles journal, September 2016

On photoexcitation of baryon antidecuplet journal, December 2003

The 1.5GeV harmonic double-sided microtron at Mainz University journal, August 2008

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Effective densities and polarizations of the targets for the GDH-experiments at MAMI and ELSA journal, June 2004

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The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region journal, September 2015

A focal plane system for the 855 MeV tagged photon spectrometer at MAMI-B journal, January 1996

Status Report on the Normal Conducting CW Racetrack Microtron Cascade "MAMI" journal, August 1983

Measurement of the Transverse Target and Beam-Target Asymmetries in η Meson Photoproduction at MAMI journal, September 2014

Evidence for narrow resonant structures at W ≈ 1.68 GeV and W ≈ 1.72 GeV in real Compton scattering off the proton journal, April 2015

Comment on “Evidence for narrow resonant structures at W ≈ 1.68 GeV and W ≈ 1.72 GeV in real Compton scattering off the proton” journal, December 2015

Interference phenomena in the JP = 1/2− wave in η photoproduction journal, June 2015

An isobar model for η photo- and electroproduction on the nucleon journal, March 2002

Photon and Electron Polarization in High-Energy Bremsstrahlung and Pair Production with Screening journal, May 1959

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Near Threshold Photoproduction of η Mesons off the Proton journal, May 1995

Geant4—a simulation toolkit journal, July 2003

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Title: Helicity-dependent cross sections and double-polarization observable $E$ in $η$ photoproduction from quasifree protons and neutrons

Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of $ \pi^{0}$ $ \pi^{\pm}$ pairs off protons and off neutrons
journal, March 2014

Review of Particle Physics
journal, October 2016

Quasifree photoproduction of $η$ mesons off protons and neutrons
journal, July 2014

Multichannel parametrization of $π N$ scattering amplitudes and extraction of resonance parameters
journal, November 2012

Design of a tagged photon spectrometer for use with the Mainz 840 MeV microtron
journal, March 1991

Response of TAPS to monochromatic photons with energies between 45 and 790 MeV
journal, July 1994

Review of Particle Physics
journal, August 2014

Study of non-strange baryon resonances with meson photoproduction
journal, January 2003

The BaF/sub 2/ photon spectrometer TAPS
journal, April 1991

Measurement of η photoproduction on the proton from threshold to 1500 MeV
journal, August 2007

The Mainz microtron facility MAMI
journal, January 1990

Photoproduction of η -mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) -resonance
journal, June 2007

Narrow Structure in the Excitation Function of $η$ Photoproduction off the Neutron
journal, December 2013

Photoproductionof $η$ Mesonsoff Protons for $0.75 G e V < E_{γ} < 3 G e V$
journal, January 2005

Differential cross section measurement of η photoproduction on the proton from threshold to 1100 MeV
journal, March 2002

Quasi-free photoproduction of η-mesons off the deuteron
journal, August 2011

A Mott polarimeter operating at MeV electron beam energies
journal, March 2011

$η$ Photoproduction on the Proton for Photon Energies from 0.75 to 1.95 GeV
journal, November 2002

Complete experiments in pseudoscalar photoproduction
journal, September 1975

Experimental study of the $γ p \to η p$ reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C)
journal, September 2010

Photoproduction of $η$ and $η^{'}$ mesons off protons
journal, November 2009

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C
journal, June 2008

Photoproduction of $\eta$ $\pi$ pairs off nucleons and deuterons
journal, September 2016

Partial-wave analysis of the $π^{-} p$ $\to$ $η n$ and $π^{-} p \to K^{0} Λ$ reactions
journal, October 2012

First measurement of the helicity asymmetry E in photoproduction on the proton
journal, April 2016

Parametrization of the deuteron wave function of the Paris NN potential
journal, May 1981

Measurement of $K^{-} \vec{p} η Λ$ near threshold
journal, October 2001

Near threshold photoproduction of η-mesons from complex nuclei
journal, April 1996

Narrow Resonance at E _γ = 1020 MeV in the D (γ,η) p n Reaction
journal, January 2007

Differential cross sections for the reactions $γ p \to p η$ and $γ p \to p η^{'}$
journal, October 2009

New Measurement of $Σ$ Beam Asymmetry for $η$ Meson Photoproduction on the Proton
journal, August 1998

Quasi-free photoproduction of η-mesons off 3He nuclei
journal, December 2013

Photoproduction of $η$ mesons within a coupled-channels $K$ -matrix approach
journal, December 2008

Photoproduction of η -mesons off protons
journal, August 2007

A new frozen-spin target for 4π particle detection
journal, November 1999

Constraining N∗(1535) parameters from the eta photoproduction
journal, April 1997

Photoproduction of η -mesons off nuclei for Eγ ⩽ 2.2 GeV
journal, October 2008

The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles
journal, September 2016

On photoexcitation of baryon antidecuplet
journal, December 2003

The 1.5GeV harmonic double-sided microtron at Mainz University
journal, August 2008

Insight into the Narrow Structure in $η$ Photoproduction on the Neutron from Helicity-Dependent Cross Sections
journal, September 2016

Effective densities and polarizations of the targets for the GDH-experiments at MAMI and ELSA
journal, June 2004

Nonstrange and other flavor partners of the exotic $Θ^{+}$ baryon
journal, March 2004

The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region
journal, September 2015

A focal plane system for the 855 MeV tagged photon spectrometer at MAMI-B
journal, January 1996

Status Report on the Normal Conducting CW Racetrack Microtron Cascade "MAMI"
journal, August 1983

Measurement of the Transverse Target and Beam-Target Asymmetries in $η$ Meson Photoproduction at MAMI
journal, September 2014

Evidence for narrow resonant structures at $W \approx 1.68 GeV$ and $W \approx 1.72 GeV$ in real Compton scattering off the proton
journal, April 2015

Comment on “Evidence for narrow resonant structures at $W \approx 1.68$ GeV and $W \approx 1.72$ GeV in real Compton scattering off the proton”
journal, December 2015

Interference phenomena in the JP = 1/2− wave in η photoproduction
journal, June 2015

An isobar model for η photo- and electroproduction on the nucleon
journal, March 2002

Photon and Electron Polarization in High-Energy Bremsstrahlung and Pair Production with Screening
journal, May 1959

Measurement of the beam asymmetry in η photoproduction off the proton
journal, August 2007

Near Threshold Photoproduction of $η$ Mesons off the Proton
journal, May 1995

Geant4—a simulation toolkit
journal, July 2003

Quasifree Photoproduction of $η$ Mesons off the Neutron
journal, June 2008

η photoproduction in the resonance energy region
journal, June 2007

Photoproduction of $ \pi^{0}$ -pairs off protons and off neutrons
journal, November 2015