Details

Autor(en) / Beteiligte

• Aihara, H
• Asner, D M
• Aulchenko, V
• Bala, A
• Belous, K
• Bhardwaj, V
• Bischofberger, M
• Bračko, M
• Browder, T E
• Chekelian, V
• Chen, P
• Cheon, B G
• Cho, K
• Choi, Y
• Cinabro, D
• Dalseno, J
• Danilov, M
• Doležal, Z
• Drutskoy, A
• Farhat, H
• Fast, J E
• Feindt, M
• Ferber, T
• Gabyshev, N
• Goh, Y M
• Golob, B
• Haba, J
• Hou, W-S
• Hsiung, Y B
• Hyun, H J
• Inami, K
• Ishikawa, A
• Itoh, R
• Iwasaki, Y
• Joffe, D
• Julius, T
• Kim, J B
• Klucar, J
• Ko, B R
• Kodyš, P
• Korpar, S
• Krokovny, P
• Kuhr, T
• Lange, J S
• Lee, S-H
• Li, J
• Liu, C
• Lukin, P
• Matvienko, D
• Miyabayashi, K
• Mizuk, R
• Mohanty, G B
• Moll, A
• Natkaniec, Z
• Nayak, M
• Nisar, N K
• Nishida, S
• Olsen, S L
• Oswald, C
• Park, H K
• Pestotnik, R
• Petrič, M
• Piilonen, L E
• Röhrken, M
• Sahoo, H
• Saito, T
• Santel, D
• Sanuki, T
• Savinov, V
• Schnell, G
• Schwanda, C
• Seon, O
• Sevior, M E
• Shapkin, M
• Sibidanov, A
• Sohn, Y-S
• Sokolov, A
• Solovieva, E
• Starič, M
• Steder, M
• Sumihama, M
• Tamponi, U
• Tanida, K
• Tatishvili, G
• Trabelsi, K
• Tsuboyama, T
• Unno, Y
• Uno, S
• Van Hulse, C
• Varner, G
• Varvell, K E
• Wagner, M N
• Wang, P
• Watanabe, M
• Won, E
• Yamashita, Y
• Yashchenko, S
• Yusa, Y
• Zhang, Z P
• Zhilich, V

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.