Observation of the h(c)(1P) Using e+ e- collisions above the DD threshold

T K Pedlar; D Cronin-Hennessy; J Hietala; S Dobbs; Z Metreveli; K K Seth; A Tomaradze; T Xiao; L Martin; A Powell; G Wilkinson; H Mendez; J Y Ge; D H Miller; I P J Shipsey; B Xin; G S Adams; D Hu; B Moziak; J Napolitano; K M Ecklund; J Insler; H Muramatsu; C S Park; L J Pearson; E H Thorndike; S Ricciardi; C Thomas; M Artuso; S Blusk; R Mountain; T Skwarnicki; S Stone; L M Zhang; G Bonvicini; D Cinabro; A Lincoln; M J Smith; P Zhou; J Zhu; P Naik; J Rademacker; D M Asner; K W Edwards; K Randrianarivony; G Tatishvili; R A Briere; H Vogel; P U E Onyisi; J L Rosner; J P Alexander; D G Cassel; S Das; R Ehrlich; L Gibbons; S W Gray; D L Hartill; B K Heltsley; D L Kreinick; V E Kuznetsov; J R Patterson; D Peterson; D Riley; A Ryd; A J Sadoff; X Shi; W M Sun; J Yelton; P Rubin; N Lowrey; S Mehrabyan; M Selen; J Wiss; J Libby; M Kornicer; R E Mitchell; M R Shepherd; C M Tarbert; D Besson; CLEO Collaboration

doi:10.1103/PhysRevLett.107.041803

Observation of the h(c)(1P) Using e+ e- collisions above the DD threshold

Phys Rev Lett. 2011 Jul 22;107(4):041803. doi: 10.1103/PhysRevLett.107.041803. Epub 2011 Jul 20.

Authors

T K Pedlar¹, D Cronin-Hennessy, J Hietala, S Dobbs, Z Metreveli, K K Seth, A Tomaradze, T Xiao, L Martin, A Powell, G Wilkinson, H Mendez, J Y Ge, D H Miller, I P J Shipsey, B Xin, G S Adams, D Hu, B Moziak, J Napolitano, K M Ecklund, J Insler, H Muramatsu, C S Park, L J Pearson, E H Thorndike, S Ricciardi, C Thomas, M Artuso, S Blusk, R Mountain, T Skwarnicki, S Stone, L M Zhang, G Bonvicini, D Cinabro, A Lincoln, M J Smith, P Zhou, J Zhu, P Naik, J Rademacker, D M Asner, K W Edwards, K Randrianarivony, G Tatishvili, R A Briere, H Vogel, P U E Onyisi, J L Rosner, J P Alexander, D G Cassel, S Das, R Ehrlich, L Gibbons, S W Gray, D L Hartill, B K Heltsley, D L Kreinick, V E Kuznetsov, J R Patterson, D Peterson, D Riley, A Ryd, A J Sadoff, X Shi, W M Sun, J Yelton, P Rubin, N Lowrey, S Mehrabyan, M Selen, J Wiss, J Libby, M Kornicer, R E Mitchell, M R Shepherd, C M Tarbert, D Besson; CLEO Collaboration

Affiliation

¹ Luther College, Decorah, Iowa 52101, USA.

PMID: 21866994
DOI: 10.1103/PhysRevLett.107.041803

Abstract

Using 586 pb(-1) of e+ e- collision data at E(c.m.) = 4170 MeV, produced at the Cornell Electron Storage Ring collider and collected with the CLEO-c detector, we observe the process e+ e- → π+ π- h(c)(1P). We measure its cross section to be 15.6±2.3±1.9±3.0 pb, where the third error is due to the external uncertainty on the branching fraction of ψ(2S) → π0 h(c)(1P), which we use for normalization. We also find evidence for e+ e- → ηh(c)(1P) at 4170 MeV at the 3σ level and see hints of a rise in the e+ e- → π+ π- h(c)(1P) cross section at 4260 MeV.