Photoproduction of neutral pion pairs from the proton

Wolf, M.; Ahrens, J.; Beck, R.; Hejny, V.; Kellie, J. D.; Kotulla, M.; Krusche, B.; Kuhr, V.; Leukel, R.; Metag, V.; Nácher, Juan; Novotny, R.; León, Vladimir; Owens, R.O.; Rambo, F.; Schmidt, A.; Schumacher, M.; Siodlaczek, U.; Ströher, H.; Weiss, Jeffrey M.; Wissmann, F.

doi:10.1007/s100500070048

Cited by 76 publications

(32 citation statements)

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“…Before discussing the agreement between the experimental data and the calculation, it is important to note that the values of W LM do not determine final-state distributions of γp → π 0 π 0 p [because of the integration over energies ω 1 and ω 2 in Eq. (3)]. Therefore, the theoretical results shown in Figs.…”

Section: Discussion Of the Resultsmentioning

confidence: 96%

“…1 as a function of the incident-photon energy and are compared to some previous measurements. The majority of previous γp → π 0 π 0 p experiments were at MAMI [1][2][3]7,8,12,40]. In Fig.…”

Section: Discussionmentioning

confidence: 99%

“…During the last two decades, an extensive study of doublepion photoproduction for E γ < 1 GeV has been undertaken [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The theoretical interpretation of the data in various isospin channels was carried out using different phenomenological analyses [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of theγp→π0π0preaction with the Crystal Ball/TAPS detector system at the Mainz Microtron

Kashevarov¹,

Fix²,

Prakhov³

et al. 2012

Phys. Rev. C

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The γp → π 0 π 0 p reaction has been measured from threshold to 1.4 GeV using the Crystal Ball and TAPS photon spectrometers together with the photon tagging facility at the Mainz Microtron. The experimental results include total and differential cross sections as well as specific angular distributions, which were used to extract partial-wave amplitudes. In particular, the energy region below the D 13 (1520) resonance was studied.

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Section: Discussion Of the Resultsmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Experimental study of theγp→π0π0preaction with the Crystal Ball/TAPS detector system at the Mainz Microtron

Kashevarov¹,

Fix²,

Prakhov³

et al. 2012

Phys. Rev. C

Self Cite

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“…For the π 0 π 0 channel a series of experiments were performed at MAMI-B with TAPS on a proton target [173,174] and a deuteron target [175] from threshold to 820 MeV photon energies. Then measurements were continued with the Crystal Ball/TAPS [176] combination.…”

Section: Photoproduction Of Two Pseudoscalar Mesonsmentioning

confidence: 99%

Photoproduction reactions and non-strange baryon spectroscopy

Ireland

Pasyuk

Strakovsky

2020

Progress in Particle and Nuclear Physics

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We review the last two decades of using photon beams to measure the production of mesons, and in particular the information that can be obtained on the spectrum of light, non-strange baryons. This is a compendium of experimental results, which should be used as a complement to theoretical reviews of the subject. Lists of data sets are given, together with a comprehensive set of references. An indication of the impact of the data is presented with a summary of the results.

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“…Furthermore, some states with certain quantum numbers appear in the spectrum at excitation energies much lower than predicted [31]. The problem of the missing resonances [31,32,33] has motivated the realization of several experiments, such as CB-ELSA [34], CBELSA/TAPS [35], TAPS [36,37,38], GRAAL [39,40], SAPHIR [41,42] and CLAS [43,44,45], which only provided a few weak indications about some states. Even though several experiments have been dedicated to the search of missing resonances, just a small number of them has been included into the resonance list [31].…”

Section: Introductionmentioning

confidence: 99%

Dirac Shell Quark-core Model for the Study of Non-strange Baryonic Spectroscopy

Sanctis

2019

Acta Phys. Pol. B

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A Dirac shell model is developed for the study of baryon spectroscopy, taking into account the most relevant results of the quark-diquark models. The lack of translational invariance of the shell model is avoided, in the present work, by introducing a scalar-isoscalar fictitious particle that represents the origin of quark shell interaction; in this way the states of the system are eigenstates of the total momentum of the baryon. Only one-particle excitations are considered. A two-quark core takes the place of the diquark, while the third quark is excited to reproduce the baryonic resonances. For the N (939) and ∆(1232), that represent the ground states of the spectra, the three quarks are considered identical particles and the wave functions are completely antisymmetric. The model is used to calculate the spectra of the N and ∆ resonances and the nucleon magnetic moments. The results are compared to the present experimental data. Due to the presence of the core and to the one-particle excitations, the structure of the obtained spectra is analogous to that given by the quark-diquark models.

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Photoproduction of neutral pion pairs from the proton

Cited by 76 publications

References 0 publications

Experimental study of theγp→π0π0preaction with the Crystal Ball/TAPS detector system at the Mainz Microtron

Experimental study of theγp→π0π0preaction with the Crystal Ball/TAPS detector system at the Mainz Microtron

Photoproduction reactions and non-strange baryon spectroscopy

Dirac Shell Quark-core Model for the Study of Non-strange Baryonic Spectroscopy

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