Test of Low-Energy Theorems for <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>H</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>1</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><mrow><mover><mrow><mi mathvariant="italic">γ</mi></mrow><mrow><mo>→</mo></mrow></mover></mrow></mrow><mo>,</mo><mi></mi><mrow><msup><mrow><mi mathvariant="italic">π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow><mo>)</mo><mrow><mmultiscripts><mrow><mi>H</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>1</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> in the Threshold Region

A. Schmidt; P. Achenbach; J. Ahrens; H. J. Arends; R. Beck; A. M. Bernstein; V. Hejny; M. Kotulla; B. Krusche; V. Kuhr; R. Leukel; I. J. D. MacGregor; J. C. McGeorge; V. Metag; V. M. Olmos de León; F. Rambo; U. Siodlaczek; H. Ströher; Th. Walcher; J. Weiß; F. Wissmann; M. Wolf

doi:10.1103/PhysRevLett.87.232501

Test of Low-Energy Theorems for ${}^{1}H (\vec{γ}, π^{0}) {}^{1}H$ in the Threshold Region

A. Schmidt, P. Achenbach, J. Ahrens, H. J. Arends, R. Beck, A. M. Bernstein, V. Hejny, M. Kotulla, B. Krusche, V. Kuhr, R. Leukel, I. J. D. MacGregor, J. C. McGeorge, V. Metag, V. M. Olmos de León, F. Rambo, U. Siodlaczek, H. Ströher, Th. Walcher, J. Weiß, F. Wissmann, and M. Wolf

Phys. Rev. Lett. 87, 232501 – Published 15 November 2001; Erratum Phys. Rev. Lett. 110, 039903 (2013)

Abstract

The photon asymmetry in the reaction $^{1} H (\vec{γ}, π^{0})^{1} H$ close to threshold has been measured for the first time with the photon spectrometer TAPS using linearly polarized photons from the tagged-photon facility at the Mainz Microtron MAMI. The total and differential cross sections were also measured simultaneously with the photon asymmetry. This allowed determination of the $S$ -wave and all three $P$ -wave amplitudes. The values obtained at threshold are $E_{0 +} = [- 1.33 \pm 0.08 (stat) \pm 0.03 (syst)] \times 10^{- 3} {/ m}_{π^{+}}$ , $P_{1} = [9.47 \pm 0.08 (stat) \pm 0.29 (syst)] \times 10^{- 3} {q / m}_{π^{+}}^{2}$ , $P_{2} = [- 9.46 \pm 0.1 (stat) \pm 0.29 (syst)] \times 10^{- 3} {q / m}_{π^{+}}^{2}$ , and $P_{3} = [11.48 \pm 0.06 (stat) \pm 0.35 (syst)] \times 10^{- 3} {q / m}_{π^{+}}^{2}$ .

Received 18 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.232501

Erratum

Erratum: Test of Low-Energy Theorems for ${}^{1}H (\vec{γ}, π^{0}) {}^{1}H$ in the Threshold Region [Phys. Rev. Lett. 87, 232501 (2001)]

A. Schmidt, P. Achenbach, J. Ahrens, H. J. Arends, R. Beck, A. M. Bernstein, V. Hejny, M. Kotulla, B. Krusche, V. Kuhr, R. Leukel, I. J. D. MacGregor, J. C. McGeorge, V. Metag, V. M. Olmos de León, F. Rambo, U. Siodlaczek, H. Ströher, Th. Walcher, J. Weiß, F. Wissmann, and M. Wolf

Phys. Rev. Lett. 110, 039903 (2013)

Authors & Affiliations

A. Schmidt¹, P. Achenbach³, J. Ahrens¹, H. J. Arends¹, R. Beck^1,*, A. M. Bernstein², V. Hejny³, M. Kotulla⁴, B. Krusche⁵, V. Kuhr⁶, R. Leukel¹, I. J. D. MacGregor⁷, J. C. McGeorge⁷, V. Metag⁴, V. M. Olmos de León¹, F. Rambo⁶, U. Siodlaczek⁸, H. Ströher³, Th. Walcher¹, J. Weiß⁴, F. Wissmann⁶, and M. Wolf⁴

¹Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany
²Department of Physics and Laboratory for Nuclear Science, MIT, Boston, Massachusetts
³Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
⁴II. Physikalisches Institut, Justus-Liebig-Universität Gießen, D-35392 Gießen, Germany
⁵Department für Physik und Astronomie, Universität Basel, CH-4056 Basel, Switzerland
⁶II. Physikalisches Institut, Georg-August-Universität Göttingen, D-37073 Göttingen, Germany
⁷Department of Physics and Astronomy, Glasgow University, Glasgow G128QQ, United Kingdom
⁸Physikalisches Institut, Eberhard-Karls-Universität Tübingen, D-72076 Tübingen, Germany

^*Corresponding author.Email address: rbeck@kph.uni-mainz.de

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Vol. 87, Iss. 23 — 3 December 2001

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Physical Review Letters

Test of Low-Energy Theorems for H1(γ→,π0)H1 in the Threshold Region

A. Schmidt, P. Achenbach, J. Ahrens, H. J. Arends, R. Beck, A. M. Bernstein, V. Hejny, M. Kotulla, B. Krusche, V. Kuhr, R. Leukel, I. J. D. MacGregor, J. C. McGeorge, V. Metag, V. M. Olmos de León, F. Rambo, U. Siodlaczek, H. Ströher, Th. Walcher, J. Weiß, F. Wissmann, and M. Wolf

Phys. Rev. Lett. 87, 232501 – Published 15 November 2001; Erratum Phys. Rev. Lett. 110, 039903 (2013)

Abstract

Erratum

Erratum: Test of Low-Energy Theorems for H1(γ→,π0)H1 in the Threshold Region [Phys. Rev. Lett. 87, 232501 (2001)]

A. Schmidt, P. Achenbach, J. Ahrens, H. J. Arends, R. Beck, A. M. Bernstein, V. Hejny, M. Kotulla, B. Krusche, V. Kuhr, R. Leukel, I. J. D. MacGregor, J. C. McGeorge, V. Metag, V. M. Olmos de León, F. Rambo, U. Siodlaczek, H. Ströher, Th. Walcher, J. Weiß, F. Wissmann, and M. Wolf

Phys. Rev. Lett. 110, 039903 (2013)

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Test of Low-Energy Theorems for ${}^{1}H (\vec{γ}, π^{0}) {}^{1}H$ in the Threshold Region

Erratum: Test of Low-Energy Theorems for ${}^{1}H (\vec{γ}, π^{0}) {}^{1}H$ in the Threshold Region [Phys. Rev. Lett. 87, 232501 (2001)]