Resonance-like coherent production of a pion pair in the reaction $pd \o pd\pi\pi  in the GeV region

Komarov, V.I.; Tsirkov, D.; Azaryan, T.; Bagdasarian, Z.; Baimurzinova, B.; Barsov, S.; Dymov, S.; Gebel, R.; Hartmann, M.; Kacharava, A.; Khoukaz, A.; Kulikov, A.; Kunsafina, A.; Kurbatov, V.; Kurmanaliyev, Z.; Lorentz, B.; Macharashvili, G.; Mchedlishvili, D.; Merzliakov, S.; Mikirtytchiants, S.; Nioradze, M.; Ohm, H.; Rathmann, F.; Serdyuk, V.; Shmakova, V.; Ströher, H.; Trusov, S.; Uzikov, Y.; Valdau, Y.; Wilkin, C.

Авторы: Komarov V.I., Tsirkov D., Azaryan T., Bagdasarian Z., Baimurzinova B., Barsov S., Dymov S., Gebel R., Hartmann M., Kacharava A., Khoukaz A., Kulikov A., Kunsafina A., Kurbatov V., Kurmanaliyev Zh, Lorentz B., Macharashvili G., Mchedlishvili D., Merzliakov S., Mikirtytchiants S., Nioradze M., Ohm H., Rathmann F., Serdyuk V., Shmakova V., Ströher H., Trusov S., Uzikov Yu, Valdau Yu, Wilkin C.
Журнал: European Physical Journal A
Том: 54
Номер: 11
Год издания: 2018
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 206-1
Последняя страница: 206-14
DOI: 10.1140/epja/i2018-12641-0
Аннотация: The reaction 𝑝+𝑑→𝑝+𝑑+𝑋 was studied at 0.8-2.0 GeV proton beam energies with the ANKE magnetic spectrometer at the COSY synchrotron storage ring. The proton-deuteron pairs emerging with high momenta, 0.6-1.8 GeV/c, were detected at small angles with respect to the proton beam. Distribution over the reaction missing mass 𝑀𝑥 reveals a local enhancement near the threshold of the pion pair production specific for the so-called ABC effect. The enhancement has a structure of a narrow bump placed above a smooth continuum. The invariant mass of the 𝑑𝜋𝜋 system in this enhancement region exhibits a resonance-like peak at 𝑀𝑑𝜋𝜋≈2.36 GeV/c2 with the width Γ≈0.10 GeV/c2. A possible interpretation of these features is discussed.
Добавил в систему: Узиков Юрий Николаевич

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Resonance-like coherent production of a pion pair in the reaction $pd \o pd\pi\pi in the GeV regionстатья

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