Details

Autor(en) / Beteiligte

• Tisserand, V.
• Grauges, E.
• Palano, A.
• Eigen, G.
• Stugu, B.
• Lynch, G.
• Asgeirsson, D. J.
• So, R. Y.
• Khan, A.
• Buzykaev, A. R.
• Druzhinin, V. P.
• Onuchin, A. P.
• Serednyakov, S. I.
• Bondioli, M.
• Lankford, A. J.
• Long, O.
• Vitug, G. M.
• Eisner, A. M.
• Seiden, A.
• Cheng, C. H.
• Flood, K. T.
• Hitlin, D. G.
• Ongmongkolkul, P.
• Ayad, R.
• Schubert, K. R.
• Schwierz, R.
• Bernard, D.
• Verderi, M.
• Playfer, S.
• Bettoni, D.
• Bozzi, C.
• Luppi, E.
• Patteri, P.
• Lo Vetere, M.
• Passaggio, S.
• Patrignani, C.
• Bhuyan, B.
• Lee, C. L.
• Morii, M.
• Chen, C.
• Cochran, J.
• Guo, Z. J.
• Derkach, D.
• Grosdidier, G.
• Schune, M. H.
• Fry, J. R.
• Sacco, R.
• Davis, C. L.
• Griessinger, K.
• Hafner, A.
• Hamilton, B.
• Biassoni, P.
• Palombo, F.
• Stracka, S.
• Cremaldi, L.
• Summers, D. J.
• Sciacca, C.
• Martinelli, M.
• Strom, D.
• Torrence, E.
• Gagliardi, N.
• Margoni, M.
• Rotondo, M.
• Bomben, M.
• Ocariz, J.
• Pacetti, S.
• Bettarini, S.
• Cervelli, A.
• Giorgi, M. A.
• Smith, A. J. S.
• Li Gioi, L.
• Piredda, G.
• Leddig, T.
• Schröder, H.
• Voß, C.
• Vasseur, G.
• Cartaro, C.
• Convery, M. R.
• Ebert, M.
• Field, R. C.
• Hast, C.
• Kocian, M. L.
• Schindler, R. H.
• Va’vra, J.
• Wulsin, H. W.
• Park, W.
• Wilson, J. R.
• Bellis, M.
• Alam, M. S.
• Peimer, D. R.
• Spanier, S. M.
• Schwitters, R. F.
• Wray, B. C.
• Izen, J. M.
• Zambito, S.
• Martinez-Vidal, F.
• Albert, J.
• Kowalewski, R.
• Sobie, R. J.
• Latham, T. E.

Titel

Study of the reaction e + e − → ψ ( 2 S ) π + π − via initial-state radiation at BaBar

Ist Teil von

• Physical review. D, Particles, fields, gravitation, and cosmology, 2014-06, Vol.89 (11), Article 111103

Ort / Verlag

American Physical Society

Erscheinungsjahr

2014

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• We study the process $e^+e^-\to\psi(2S)\pi^{+}\pi^{-}$ with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the \BaBar detector at center-of-mass energies at and near the $\Upsilon(\mathrm{nS})$ (n = 2, 3, 4) resonances and correspond to an integrated luminosity of 520$fb^{-}$. We investigate the $\psi(2S)\pi^{+}\pi^{-}$ mass distribution from 3.95 to 5.95 $GeV/c^{2}$, and measure the center-of-mass energy dependence of the associated $e^+e^-\to \psi(2S)\pi^{+}\pi^{-}$ cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the $\psi(2S)\pi^{+}\pi^{-}$ mass distribution corresponding to the decay mode $\psi(2S)\to J/\psi \pi^{+}\pi^{-}$ yields a mass value of $4340 \pm16$ (stat) $\pm 9$ (syst) ${\mathrm {MeV/c^{2}}}and a width of $94 \pm 32$ (stat) $\pm 13$ (syst) MeV for the first resonance, and for the second a mass value of $4669 \pm 21$ (stat) $\pm 3$ (syst) ${\mathrm {MeV/c^{2}}}$ and a width of $104 \pm 48$ (stat) $\pm 10$ (syst) MeV. In addition, we show the $pi^{+}\pi^{-}$ mass distributions for these resonant regions.