Upgraded DIRAC spectrometer at CERN PS for the investigation of ππ and πK atoms

Adeva, B.; Afanasyev, L.; Allkofer, Y.; Amsler, C.; Anania, A.; Aogaki, S.; Benelli, A.; Brekhovskikh, V.; Caragheorgheopol, G.; Cechak, T.; Chiba, M.; Chliapnikov, P.; Ciocarlan, C.; Constantinescu, S.; Detraz, C.; Doskarova, P.; Drijard, D.; Dudarev, A.; Duma, M.; Dumitriu, D.; Fluerasu, D.; Gorin, A.; Gorchakov, O.; Gritsay, K.; Guaraldo, C.; Gugiu, M.; Hansroul, M.; Hons, Z.; Horikawa, S.; Iwashita, Y.; Karpukhin, V.; Kluson, J.; Kobayashi, M.; Kruglov, V.; Kruglova, L.; Kulikov, A.; Kulish, E.; Kuptsov, A.; Lamberto, A.; Lanaro, A.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2018 г.

Авторы: Adeva B., Afanasyev L., Allkofer Y., Amsler C., Anania A., Aogaki S., Benelli A., Brekhovskikh V., Caragheorgheopol Gh, Cechak T., Chiba M., Chliapnikov P., Ciocarlan C., Constantinescu S., Detraz C., Doskarova P., Drijard D., Dudarev A., Duma M., Dumitriu D., Fluerasu D., Gorin A., Gorchakov O., Gritsay K., Guaraldo C., Gugiu M., Hansroul M., Hons Z., Horikawa S., Iwashita Y., Karpukhin V., Kluson J., Kobayashi M., Kruglov V., Kruglova L., Kulikov A., Kulish E., Kuptsov A., Lamberto A., Lanaro A.
Журнал: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Том: 839
Год издания: 2016
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 52
Последняя страница: 85
DOI: 10.1016/j.nima.2016.07.049
Аннотация: Abstract The DIRAC spectrometer installed at CERN PS was upgraded in order to study simultaneously A2π and AπK atoms, namely the bound states of two π mesons, and of π and K mesons, respectively. The detector system can now accept a high intensity beam of 2 - 6 × 1011 primary protons per second. The electronics and the data-acquisition system can handle a very large amount of data to identify π, K, p, e and µ, allowing the selection of ππ and πK pairs in the offline analysis. The resolution of the longitudinal and transverse components of the relative momentum Q of each meson pair in their centre-of-mass system with respect to the direction of the pair was substantially improved. The analysis of their distributions allowed an reliable separation between the meson pairs originating from hadronic atoms and the backgrounds permitting the measurement of the lifetimes of hadronic atoms in the ground state and π-π, π-K s-wave scattering lengths. The upgraded setup also allowed the study of the long-lived excited states of ππ atoms.
Добавил в систему: Трусов Сергей Вениаминович

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Upgraded DIRAC spectrometer at CERN PS for the investigation of ππ and πK atomsстатья

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