| Autor: |
Ishikawa Takatsugu, Fujimura Hisako, Fukasawa Hiroshi, Hashimoto Ryo, He Qinghua, Honda Yuki, Iwata Takahiro, Kaida Shun, Kanda Hiroki, Kasagi Jirohta, Kawano Atsushi, Kuwasaki Shuzo, Maeda Kazushige, Masumoto Shin’ichi, Miyabe Manabu, Miyahara Fusashi, Mochizuki Keiichi, Muramatsu Norihito, Nakamura Akihiko, Nawa Ken’ichi, Ogushi Shoei, Okada Yasuyuki, Okamura Ken’yu, Onodera Yoshihito, Ozawa Kyoichiro, Sakamoto Yasunobu, Shimizu Hajime, Sugai Hiroyuki, Suzuki Koutaku, Tajima Yasuhisa, Takahashi Shin’ichiro, Taniguchi Yusuke, Tsuchikawa Yusuke, Yamazaki Hirohito, Yamazaki Ryuji, Yoshida Hiroshi |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 241, p 01007 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202024101007 |
| Popis: |
The B = 2 bound/resonance state (dibaryon) is an interesting object, which can be a molecule consisting of two baryons or a spatially compact hexaquark hadron object. The yd ^ n°n°d reaction has been experimentally investigated at incident energies ranging from 0.58 to 1.15 GeV to study non-strange dibaryons. The angular distributions of deuteron emission in the yd center-of-mass energy cannot be reproduced by quasi-free production of two neutral pions followed by deuteron coalescence. Additionally a 2.14-GeV peak is observed in the n°d invariant mass distribution. These suggest a sequential process such as yd ^ RIS ^ n°RIV ^ n°n°d with an isoscalar dibaryon RIS and an isovector dibaryon RIV. Since the mass of the observed isoscalar dibaryons are close to the sum of the nucleon (N) and nucleon resonance (N*) masses, an S-wave NN* molecule may play a role as a doorway to a dibaryon. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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