Search for narrow dibaryon resonances in neutral pion photoproduction from the deuteron

U. Siodlaczek; P. Achenbach; J. Ahrens; H.-J. Arends; R. Beck; R. Bilger; H. Clement; V. Hejny; J.D. Kellie; M. Kotulla; B. Krusche; V. Kuhr; R. Leukel; J.C. McGeorge; V. Metag; R. Novotny; V. Olmos de León; F. Rambo; M. Schepkin; A. Schmidt; H. Ströher; G.J. Wagner; Th. Walcher; J. Weiß; F. Wissmann; M. Wolf

doi:doi:10.1007/s100500070015

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 9, 309-311

Short note

Search for narrow dibaryon resonances in neutral pion photoproduction from the deuteron

U. Siodlaczek¹ - P. Achenbach² - J. Ahrens³ - H.-J. Arends³ - R. Beck³ - R. Bilger¹ - H. Clement¹ - V. Hejny⁴ - J.D. Kellie⁸ - M. Kotulla² - B. Krusche⁷ - V. Kuhr⁵ - R. Leukel³ - J.C. McGeorge⁸ - V. Metag² - R. Novotny² - V. Olmos de León³ - F. Rambo⁵ - M. Schepkin⁶ - A. Schmidt³ - H. Ströher⁴ - G.J. Wagner¹ - Th. Walcher³ - J. Weiß² - F. Wissmann⁵ - M. Wolf²

¹ Physikalisches Institut, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
² II. Physikalisches Institut, Universität Gieß en, D-35392 Gießen, Germany
³ Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany
⁴ Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany
⁵ II. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen, Germany
⁶ Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
⁷ Institut für Physik und Astronomie, Universität Basel, Klingelbergstr. 82, CH-4056 Basel, Switzerland
⁸ Department of Physics and Astronomy, University of Glasgow, Glasgow G128 QQ, UK

Received: 25 October 2000
Communicated by M. Garçon

Abstract
The reaction $\gamma d \to \pi^0X$ has been measured with TAPS at MAMI in the energy range $E_\gamma = 140$ -300 MeV. Using the Glasgow tagging spectrometer a photon energy resolution of 0.8 MeV was achieved. The energy excitation functions of integral and differential total cross-sections show no structures of statistical significance $> 2\sigma$ . Upper limits for the production of narrow isoscalar or isovector dibaryons with masses $m \leq 2100$ MeV/c² were deduced. They are in the range 2-5 $\mu$ b averaged over the 0.8 MeV energy resolution.