Bibliographic Details
| Title: |
Inclusive spectrum of the $d(\pi^+, K^+)$ reaction at 1.69 GeV/c |
| Authors: |
Ichikawa, Yudai, Nagae, Tomofumi, Bhang, Hyoungchan, Bufalino, Stefania, Ekawa, Hiroyuki, Evtoukhovitch, Petr, Feliciello, Alessandro, Fujioka, Hiroyuki, Hasegawa, Shoichi, Hayakawa, Shuhei, Honda, Ryotaro, Hosomi, Kenji, Imai, Ken'ichi, Ishimoto, Shigeru, Joo, Changwoo, Kanatsuki, Shunsuke, Kiuchi, Ryuta, Koike, Takeshi, Kumawat, Harphool, Matsumoto, Yuki, Miwa, Koji, Moritsu, Manabu, Naruki, Megumi, Niiyama, Masayuki, Nozawa, Yuki, Ota, Ryosuke, Sakaguchi, Atsushi, Sako, Hiroyuki, Samoilov, Valentin, Sato, Susumu, Shirotori, Kotaro, Sugimura, Hitoshi, Suzuki, Shoji, Takahashi, Toshiyuki, Takahashi, Tomonori N., Tamura, Hirokazu, Tanaka, Toshiyuki, Tanida, Kiyoshi, Tokiyasu, Atsushi O., Tsamalaidze, Zviadi, Roy, Bidyut, Ukai, Mifuyu, Yamamoto, Takeshi O., Yang, Seongbae |
| Publication Year: |
2014 |
| Collection: |
Nuclear Experiment |
| Subject Terms: |
Nuclear Experiment |
| More Details: |
We have measured an inclusive missing-mass spectrum of the $d(\pi^+, K^+)$ reaction at the pion incident momentum of 1.69 GeV/$c$ at the laboratory scattering angles between 2$^\circ$ and 16$^\circ$ with the missing-mass resolution of 2.7 $\pm$ 0.1 MeV/$c^2$ (FWHM) at the missing mass of 2.27 GeV/$c^{2}$. In this Letter, we first try to understand the spectrum as a simple quasi-free picture based on several known elementary cross sections, considering the neutron/proton Fermi motion in deuteron. While gross spectrum structures are well understood in this picture, we have observed two distinct deviations; one peculiar enhancement at 2.13 GeV/$c^2$ is due to the $\Sigma N$ cusp, and the other notable feature is a shift of a broad bump structure, mainly originating from hyperon resonance productions of $\Lambda(1405)$ and $\Sigma(1385)^{+/0}$, by about 22.4 $\pm$ 0.4 (stat.) $^{+2.7}_{-1.7}$ (syst.) MeV/$c^2$ toward the low-mass side, which is calculated in the kinematics of a proton at rest as the target.
Comment: 8 pages, 3 figures, submitted to PTEP |
| Document Type: |
Working Paper |
| DOI: |
10.1093/ptep/ptu128 |
| Access URL: |
http://arxiv.org/abs/1407.3051 |
| Accession Number: |
edsarx.1407.3051 |
| Database: |
arXiv |
