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Title: Photon asymmetry measurements of $$\overrightarrow{\gamma}p \rightarrow \pi^{0} p$$ γ → p → π 0 p for $$E_{\gamma}=$$ 320-650 MeV

Abstract

High-statistics measurements of the photon asymmetry Σ for the $$\overrightarrow{\gamma}p \rightarrow \pi^{0} p$$ reaction have been made in the center-of-mass energy range W = 1214–1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The resulting measurements significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, $$\check{Σ}$$ (= σ0Σ), and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520)3/2- and N(1535)1/2- resonances.

Authors:
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Publication Date:
Research Org.:
George Washington Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE; Science and Technology Facilities Council (STFC) (United Kingdom); German Research Foundation (DFG); European Union (EU); Swiss National Science Foundation (SNSF); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
Contributing Org.:
The A2 Collaboration at MAMI
OSTI Identifier:
1425737
Grant/Contract Number:  
SC0014133; SAPPJ-2015-00023
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 52; Journal Issue: 11; Journal ID: ISSN 1434-6001
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Gardner, S., Howdle, D., Sikora, M. H., Wunderlich, Y., Abt, S., Achenbach, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Costanza, S., Collicott, C., Demissie, B. T., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Filkov, L. V., Glazier, D. I., Garni, S., Gradl, W., Günther, M., Gurevich, G. M., Hall Barrientos, P., Hamilton, D., Heid, E., Hornidge, D., Huber, G. M., Jahn, O., Jude, T. C., Käser, A., Kay, S., Kashevarov, V. L., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Mancell, J., Manley, D. M., Martel, P. P., McGeorge, J. C., McNicoll, E. F., Middleton, D. G., Miskimen, R., Mullen, C., Mushkarenkov, A., Neganov, A. B., Neiser, A., Nikolaev, A., Oberle, M., Ostrick, M., Owens, R. O., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Robinson, J., Rosner, G., Rostomyan, T., Sarty, A., Schumann, S., Sokhoyan, V., Spieker, K., Steffen, O., Sfienti, C., Strakovsky, I. I., Strandberg, B., Strub, Th., Supek, I., Tarbert, C. M., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Witthauer, L., and Zana, L. Photon asymmetry measurements of $\overrightarrow{\gamma}p \rightarrow \pi^{0} p$ γ → p → π 0 p for $E_{\gamma}=$ 320-650 MeV. United States: N. p., 2016. Web. doi:10.1140/epja/i2016-16333-5.
Gardner, S., Howdle, D., Sikora, M. H., Wunderlich, Y., Abt, S., Achenbach, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Costanza, S., Collicott, C., Demissie, B. T., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Filkov, L. V., Glazier, D. I., Garni, S., Gradl, W., Günther, M., Gurevich, G. M., Hall Barrientos, P., Hamilton, D., Heid, E., Hornidge, D., Huber, G. M., Jahn, O., Jude, T. C., Käser, A., Kay, S., Kashevarov, V. L., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Mancell, J., Manley, D. M., Martel, P. P., McGeorge, J. C., McNicoll, E. F., Middleton, D. G., Miskimen, R., Mullen, C., Mushkarenkov, A., Neganov, A. B., Neiser, A., Nikolaev, A., Oberle, M., Ostrick, M., Owens, R. O., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Robinson, J., Rosner, G., Rostomyan, T., Sarty, A., Schumann, S., Sokhoyan, V., Spieker, K., Steffen, O., Sfienti, C., Strakovsky, I. I., Strandberg, B., Strub, Th., Supek, I., Tarbert, C. M., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Witthauer, L., & Zana, L. Photon asymmetry measurements of $\overrightarrow{\gamma}p \rightarrow \pi^{0} p$ γ → p → π 0 p for $E_{\gamma}=$ 320-650 MeV. United States. https://doi.org/10.1140/epja/i2016-16333-5
Gardner, S., Howdle, D., Sikora, M. H., Wunderlich, Y., Abt, S., Achenbach, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., Cividini, F., Costanza, S., Collicott, C., Demissie, B. T., Denig, A., Dieterle, M., Downie, E. J., Drexler, P., Ferretti-Bondy, M. I., Filkov, L. V., Glazier, D. I., Garni, S., Gradl, W., Günther, M., Gurevich, G. M., Hall Barrientos, P., Hamilton, D., Heid, E., Hornidge, D., Huber, G. M., Jahn, O., Jude, T. C., Käser, A., Kay, S., Kashevarov, V. L., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Linturi, J. M., Lisin, V., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Mancell, J., Manley, D. M., Martel, P. P., McGeorge, J. C., McNicoll, E. F., Middleton, D. G., Miskimen, R., Mullen, C., Mushkarenkov, A., Neganov, A. B., Neiser, A., Nikolaev, A., Oberle, M., Ostrick, M., Owens, R. O., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Robinson, J., Rosner, G., Rostomyan, T., Sarty, A., Schumann, S., Sokhoyan, V., Spieker, K., Steffen, O., Sfienti, C., Strakovsky, I. I., Strandberg, B., Strub, Th., Supek, I., Tarbert, C. M., Thiel, A., Thiel, M., Thomas, A., Unverzagt, M., Usov, Yu. A., Watts, D. P., Werthmüller, D., Wettig, J., Wolfes, M., Witthauer, L., and Zana, L. Thu . "Photon asymmetry measurements of $\overrightarrow{\gamma}p \rightarrow \pi^{0} p$ γ → p → π 0 p for $E_{\gamma}=$ 320-650 MeV". United States. https://doi.org/10.1140/epja/i2016-16333-5. https://www.osti.gov/servlets/purl/1425737.
@article{osti_1425737,
title = {Photon asymmetry measurements of $\overrightarrow{\gamma}p \rightarrow \pi^{0} p$ γ → p → π 0 p for $E_{\gamma}=$ 320-650 MeV},
author = {Gardner, S. and Howdle, D. and Sikora, M. H. and Wunderlich, Y. and Abt, S. and Achenbach, P. and Afzal, F. and Aguar-Bartolome, P. and Ahmed, Z. and Annand, J. R. M. and Arends, H. J. and Bantawa, K. and Bashkanov, M. and Beck, R. and Biroth, M. and Borisov, N. S. and Braghieri, A. and Briscoe, W. J. and Cherepnya, S. and Cividini, F. and Costanza, S. and Collicott, C. and Demissie, B. T. and Denig, A. and Dieterle, M. and Downie, E. J. and Drexler, P. and Ferretti-Bondy, M. I. and Filkov, L. V. and Glazier, D. I. and Garni, S. and Gradl, W. and Günther, M. and Gurevich, G. M. and Hall Barrientos, P. and Hamilton, D. and Heid, E. and Hornidge, D. and Huber, G. M. and Jahn, O. and Jude, T. C. and Käser, A. and Kay, S. and Kashevarov, V. L. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Krusche, B. and Linturi, J. M. and Lisin, V. and Livingston, K. and Lutterer, S. and MacGregor, I. J. D. and Macrae, R. and Mancell, J. and Manley, D. M. and Martel, P. P. and McGeorge, J. C. and McNicoll, E. F. and Middleton, D. G. and Miskimen, R. and Mullen, C. and Mushkarenkov, A. and Neganov, A. B. and Neiser, A. and Nikolaev, A. and Oberle, M. and Ostrick, M. and Owens, R. O. and Otte, P. B. and Oussena, B. and Paudyal, D. and Pedroni, P. and Polonski, A. and Prakhov, S. and Rajabi, A. and Robinson, J. and Rosner, G. and Rostomyan, T. and Sarty, A. and Schumann, S. and Sokhoyan, V. and Spieker, K. and Steffen, O. and Sfienti, C. and Strakovsky, I. I. and Strandberg, B. and Strub, Th. and Supek, I. and Tarbert, C. M. and Thiel, A. and Thiel, M. and Thomas, A. and Unverzagt, M. and Usov, Yu. A. and Watts, D. P. and Werthmüller, D. and Wettig, J. and Wolfes, M. and Witthauer, L. and Zana, L.},
abstractNote = {High-statistics measurements of the photon asymmetry Σ for the $\overrightarrow{\gamma}p \rightarrow \pi^{0} p$ reaction have been made in the center-of-mass energy range W = 1214–1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The resulting measurements significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, $\check{Σ}$ (= σ0Σ), and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520)3/2- and N(1535)1/2- resonances.},
doi = {10.1140/epja/i2016-16333-5},
journal = {European Physical Journal. A},
number = 11,
volume = 52,
place = {United States},
year = {2016},
month = {11}
}

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Works referenced in this record:

The Crystal ball and taps Detectors at the mami Electron beam Facility
conference, January 2012

  • Watts, Daniel
  • Proceedings of the Eleventh International Conference, Calorimetry in Particle Physics
  • DOI: 10.1142/9789812701978_0015

Photoproduction of π 0 on Protons by Polarized γ Rays
journal, August 1969


Measurement of π 0 photoproduction on the proton at MAMI C
journal, August 2015


Experimental studies of the Σ, T, P polarization parameters and the γp→pπ0 reaction multipole analysis in the first resonance region
journal, March 1983


Measurement of the cross section asymmetry of the reaction γ p π ° p in the resonance energy region E γ = 0.5 1.1 GeV
journal, April 2001


High statistics study of the reaction γp → pπ0 η
journal, April 2014


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

  • Anthony, I.; Kellie, J. D.; Hall, S. J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 301, Issue 2
  • DOI: 10.1016/0168-9002(91)90464-2

Measurement of the H 1 ( γ⃗ , p⃗ ) π 0 Reaction Using a Novel Nucleon Spin Polarimeter
journal, January 2014


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

  • Gabler, A. R.; Döring, W.; Fuchs, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 346, Issue 1-2
  • DOI: 10.1016/0168-9002(94)90701-3

: A statistical tool to unfold data distributions
journal, December 2005

  • Pivk, M.; Le Diberder, F. R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 555, Issue 1-2
  • DOI: 10.1016/j.nima.2005.08.106

Review of Particle Physics
journal, August 2014


The Stonehenge technique. A method for aligning coherent bremsstrahlung radiators
journal, May 2009

  • Livingston, Ken
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 603, Issue 3
  • DOI: 10.1016/j.nima.2009.02.010

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
  • DOI: 10.1016/j.nima.2008.05.018

Coherent Bremsstrahlung of Electrons in Crystals
journal, January 1969


Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis
journal, April 2010


Accurate Test of Chiral Dynamics in the γ p π 0 p Reaction
journal, August 2013


The said pwa Program
journal, January 2003

  • Arndt, R. A.; Strakovsky, I. I.; Workman, R. L.
  • International Journal of Modern Physics A, Vol. 18, Issue 03
  • DOI: 10.1142/S0217751X0301437X

Linearly polarized photons at MAMI (Mainz)
journal, April 1994

  • Lohmann, D.; Peise, J.; Ahrens, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 343, Issue 2-3
  • DOI: 10.1016/0168-9002(94)90230-5

Beam asymmetry Σ for π + and π 0 photoproduction on the proton for photon energies from 1.102 to 1.862 GeV
journal, December 2013


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

  • 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
  • DOI: 10.1016/0168-9002(95)00661-3

Neutral Meson Production with Polarized X Rays
journal, October 1964


The selection and performance of diamond radiators used in coherent bremsstrahlung experiments
journal, June 2005

  • Kellie, J. D.; Clive, P. J. M.; Yang, G. L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 545, Issue 1-2
  • DOI: 10.1016/j.nima.2004.12.042

Measurement of πphotoproduction on the proton from 550 to 1500 MeV at GRAAL
journal, December 2005


The Mainz Microtron MAMI --Past and future
journal, May 2006


Experiments with photons at MAMI
journal, May 2006


Geant4—a simulation toolkit
journal, July 2003

  • 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
  • DOI: 10.1016/S0168-9002(03)01368-8

Asymmetry measurements for π0 and π+ photoproduction by linearly polarized γ-rays in the energy range (400÷900) MeV
journal, July 1972

  • Zdarko, R. W.; Dally, E. B.
  • Il Nuovo Cimento A, Vol. 10, Issue 1
  • DOI: 10.1007/BF02895969

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

  • McGeorge, J. C.; Kellie, J. D.; Annand, J. R. M.
  • The European Physical Journal A, Vol. 37, Issue 1
  • DOI: 10.1140/epja/i2007-10606-0

p (γ→, π 0 ) reaction and the E 2 excitation of the Δ
journal, September 1992


Measurement of asymmetries in polarized γ N π N , with E γ from 600 to 900 MeV
journal, November 1974


Measurement of the E 2 / M 1 Ratio in the N Δ Transition using the reaction p ( γ , p ) π o
journal, January 1997


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


Entangled solitons and stochastic q-bits
journal, March 2007


Works referencing / citing this record:

N* Photoexcitation Results from Mainz
journal, July 2018


Cross section for γ n π 0 n measured at the Mainz A2 experiment
journal, December 2019