Cross section for 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>n</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>n</mml:mi></mml:mrow></mml:math>
 measured at the Mainz A2 experiment

Briscoe, W. J.; Hadžimehmedović, M.; Kudryavtsev, A. E.; Kulikov, V.; Martemianov, M.; Strakovsky, I. I.; Švarc, Alfred; Tarasov, V. E.; Workman, R. L.; Abt, S.; Achenbach, P.; Akondi, C. S.; Afzal, F.; Aguar-Bartolomé, P.; Ahmed, Z.; Annand, J. R. M.; Arends, H. J.; Bantawa, K.; Bashkanov, M.; Beck, R.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Bulychjov, S. A.; Cividini, F.; Collicott, C.; Costanza, S.; Denig, A.; Downie, E. J.; Drexler, P.; Fegan, S.; Bondy, M. I. Ferretti; Gardner, S.; Ghosal, D.; Glazier, D. I.; Gorodnov, I.; Gradl, W.; Günther, Michael; Gurevich, D. B.; Heijkenskjöld, L.; Hornidge, D.; Huber, G. M.; Käser, A.; Kashevarov, V. L.; Kay, S.; Korolija, M.; Krusche, B.; Lazarev, A. B.; Livingston, K.; Lutterer, S.; MacGregor, I. J. D.; Macrae, R.; Manley, D. M.; Martel, P. P.; McGeorge, J. C.; Middleton, D. G.; Miskimen, R.; Mornacchi, E.; Mushkarenkov, A.; Mullen, C.; Neganov, A. B.; Neiser, A.; Ostrick, M.; Otte, P. B.; Osmanović, H.; Omerović, R.; Oussena, B.; Paudyal, D.; Pedroni, P.; Powell, A. L. T.; Prakhov, S.; Ron, G.; Rostomyan, T.; Sarty, A. J.; Sfienti, C.; Sokhoyan, V.; Spieker, K.; Stahov, J.; Steffen, O.; Supek, I.; Thiel, A.; Thiel, M.; Thomas, A.; Tiator, L.; Unverzagt, M.; Usov, Yu. A.; Walford, N. K.; Watts, D. P.; Wagner, S.R.; Werthmüller, D.; Wettig, J.; Wolfes, M.; Zachariou, N.

doi:10.1103/physrevc.100.065205

Cited by 30 publications

(57 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, the A2 Collaboration at MAMI published highquality unpolarized measurements for π 0 photoproduction off a neutron below E γ = 813 MeV [3]. The present data extend the range of the previous GRAAL polarized measurements [9], for π 0 n photoproduction down to masses where the Δ(1232) and N (1440) resonances can contribute significantly to polarization observables.…”

Section: Introductionsupporting

confidence: 76%

“…6 Σ for − → γ n → π 0 n vs. pion production angle θ in c.m. frame: A2 (blue filled circles); fit: SAID MU22 (red solid curves), SAID MA19 [3] (blue dash-dotted curves), Bonn-Gatchina BG2014-02 [28] (magenta dotted curves) and MAID2007 [29] (black dashed curves). Only angle-dependent statistical uncertainties are shown for all data.…”

Section: Determination Of the Photon Asymmetrymentioning

confidence: 99%

“…This new global energy-dependent solution has been labeled as MU22. The overall fit quality of the present MU22 and previous MA19 [3] SAID fits is compared with the MAID2007 [29] solution in Tables 4 and 5. The inclusion of the present A2 data set provides a fit with significantly improved χ 2 /data, specifically at higher energies, in comparisons between the π 0 n fits and data (χ 2 /data for MA19 = 3.93 and 1.44 for MU22) as shown in Fig.…”

Section: Multipole Analysismentioning

confidence: 99%

See 2 more Smart Citations

Single $$\pi ^0$$ production off neutrons bound in deuteron with linearly polarized photons

Mullen¹,

Gardner²,

Glazier³

et al. 2021

Eur. Phys. J. A

Self Cite

View full text Add to dashboard Cite

The quasifree $$\overrightarrow{\gamma } d\rightarrow \pi ^0n(p)$$ γ → d → π 0 n ( p ) photon beam asymmetry, $$\varSigma $$ Σ , has been measured at photon energies, $$E_\gamma $$ E γ , from 390 to 610 MeV, corresponding to center of mass energy from 1.271 to 1.424 GeV, for the first time. The data were collected in the A2 hall of the MAMI electron beam facility with the Crystal Ball and TAPS calorimeters covering pion center-of-mass angles from 49$$^\circ $$ ∘ to 148$$^\circ $$ ∘ . In this kinematic region, polarization observables are sensitive to contributions from the $$\varDelta (1232)$$ Δ ( 1232 ) and N(1440) resonances. The extracted values of $$\varSigma $$ Σ have been compared to predictions based on partial-wave analyses (PWAs) of the existing pion photoproduction database. Our comparison includes the SAID, MAID and Bonn–Gatchina analyses; while a revised SAID fit, including the new $$\varSigma $$ Σ measurements, has also been performed. In addition, isospin symmetry is examined as a way to predict $$\pi ^0n$$ π 0 n photoproduction observables, based on fits to published data in the channels $$\pi ^0p$$ π 0 p , $$\pi ^+n$$ π + n and $$\pi ^-p$$ π - p .

show abstract

Section: Introductionsupporting

confidence: 76%

Section: Determination Of the Photon Asymmetrymentioning

confidence: 99%

Section: Multipole Analysismentioning

confidence: 99%

See 1 more Smart Citation

Single $$\pi ^0$$ production off neutrons bound in deuteron with linearly polarized photons

Mullen¹,

Gardner²,

Glazier³

et al. 2021

Eur. Phys. J. A

Self Cite

View full text Add to dashboard Cite

show abstract

“…The quantitative evaluation of the pole parameters of the Trace [T] was performed using the L + P formalism, in a manner identical to that used in Ref. [29]. For the convenience of the reader let us repeat some basic facts.…”

Section: Partial-wave Analysis and Data Interpretationmentioning

confidence: 99%

“…The method used is identical to what was done in Ref. [29] and is based on randomizing the central values of the energy-dependent solution with the partial-wave standard deviation σ PW and assigning the error of the source energydependent point as the error of the randomized point. In this way we generate 1000 different sets, which are analyzed by L + P, and the error analysis is done in a standard way for noncorrelated quantities.…”

Section: Partial-wave Analysis and Data Interpretationmentioning

confidence: 99%