Details

Autor(en) / Beteiligte

• Liu, Z Q
• Shen, C P
• Yuan, C Z
• Adachi, I
• Aihara, H
• Asner, D M
• Aulchenko, V
• Aushev, T
• Aziz, T
• Bakich, A M
• Bala, A
• Belous, K
• Bhardwaj, V
• Bhuyan, B
• Bischofberger, M
• Bondar, A
• Bonvicini, G
• Bozek, A
• Bračko, M
• Brodzicka, J
• Browder, T E
• Chang, P
• Chekelian, V
• Chen, A
• Chen, P
• Cheon, B G
• Chistov, R
• Cho, K
• Chobanova, V
• Choi, S-K
• Choi, Y
• Cinabro, D
• Dalseno, J
• Danilov, M
• Doležal, Z
• Drásal, Z
• Drutskoy, A
• Dutta, D
• Dutta, K
• Eidelman, S
• Epifanov, D
• Farhat, H
• Fast, J E
• Feindt, M
• Ferber, T
• Frey, A
• Gaur, V
• Gabyshev, N
• Ganguly, S
• Gillard, R
• Goh, Y M
• Golob, B
• Haba, J
• Hayasaka, K
• Hayashii, H
• Horii, Y
• Hoshi, Y
• Hou, W-S
• Hsiung, Y B
• Hyun, H J
• Iijima, T
• Inami, K
• Ishikawa, A
• Itoh, R
• Iwasaki, Y
• Joffe, D
• Julius, T
• Kah, D H
• Kang, J H
• Kawasaki, T
• Kiesling, C
• Kim, H J
• Kim, J B
• Kim, J H
• Kim, K T
• Kim, M J
• Kim, Y J
• Kinoshita, K
• Klucar, J
• Ko, B R
• Kodyš, P
• Korpar, S
• Križan, P
• Krokovny, P
• Kuhr, T
• Kwon, Y-J
• Lange, J S
• Lee, S-H
• Li, J
• Li, Y
• Libby, J
• Liu, C
• Lukin, P
• Matvienko, D
• Miyabayashi, K
• Miyata, H
• Mizuk, R
• Mohanty, G B
• Moll, A
• Mussa, R

Titel

Study of e+ e- → π+ π- J/ψ and observation of a charged charmoniumlike state at Belle

Ist Teil von

• Physical review letters, 2013-06, Vol.110 (25), p.252002-252002, Article 252002

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2013

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The cross section for ee+ e- → π+ π- J/ψ between 3.8 and 5.5 GeV is measured with a 967  fb(-1) data sample collected by the Belle detector at or near the Υ(nS) (n = 1,2,…,5) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of π+ π- J/ψ production around 4 GeV is observed. This feature can be described by a Breit-Wigner parametrization with properties that are consistent with the Y(4008) state that was previously reported by Belle. In a study of Y(4260) → π+ π- J/ψ decays, a structure is observed in the M(π(±)J/ψ) mass spectrum with 5.2σ significance, with mass M = (3894.5 ± 6.6 ± 4.5)  MeV/c2 and width Γ = (63 ± 24 ± 26)  MeV/c2, where the errors are statistical and systematic, respectively. This structure can be interpreted as a new charged charmoniumlike state.