New measurement of the rare decay η→π0γγ with the Crystal Ball/TAPS detectors at the Mainz Microtron

New measurement of the rare decay η→π0γγ with the Crystal Ball/TAPS detectors at the Mainz Microtron

Bibliographic Details
Parent link:	Physical Review C - Nuclear Physics.— , 1970- Vol. 90, № 2.— 2014.— [025206, 9 p.]
Corporate Author:	Национальный исследовательский Томский политехнический университет Физико-технический институт Кафедра высшей математики и математической физики
Other Authors:	Nefkens B. M. K., Prakhov S., Aguar-Bartolome P., Annand J. R. M., Arends H. J., Bantawa K., Beck R., Bekrenev V., Braghieri A., Briscoe W. J., Cherepnya S., Codling R. F. B., Collicott C., Costanza S., Denig A., Demissie B., Dieterle M., Drexler P., Fil'kov L. V., Fiks (Fix) A. I. Alexander Ivanovich, Gardner S., Garni S., Glazier D. I., Glowa D., Hamilton D., Hornidge D., Heid E., Käser A., Kashevarov V. L., Jude T. C., Keshelashvili I., Kondratiev R., Korolija M., Krusche B., Kruglov S., Jahn O., Lisin V., Livingston K., MacGregor I. J. D., Manley D. M., Martel P. P., Mekterovic D., McNicoll E. F., Metag W., Mushkarenkov A., Nikolaev A., Novotny R., Oberle M., Ott P., Otte P. B., Oussena B., Pedroni P., Polonski A., Robinson J., Werthmuller M., Witthauer L., Zana L. A.
Summary:	Title screen A new measurement of the rare, doubly radiative decay η→π0γγ was conducted with the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. New data on the dependence of the partial decay width, Γ(η→π0γγ), on the two-photon invariant-mass squared, m2(γγ), as well as a new, more precise value for the decay width, Γ(η→π0γγ)=(0.33±0.03tot) eV, are based on analysis of 1.2×103η→π0γγ decays from a total of 6×107η mesons produced in the γp→ηp reaction. The present results for dΓ(η→π0γγ)/dm2(γγ) are in good agreement with previous measurements and recent theoretical calculations for this dependence. Режим доступа: по договору с организацией-держателем ресурса
Language:	English
Published:	2014
Subjects:	труды учёных ТПУ
Online Access:	http://dx.doi.org/10.1103/PhysRevC.90.025206
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=648781

Internet

http://dx.doi.org/10.1103/PhysRevC.90.025206