Skip to main content
eScholarship
Open Access Publications from the University of California

Study of Υ(3S,2S)→ηΥ(1S) and Υ(3S,2S) →π+π-Υ(1S) hadronic transitions

  • Author(s): Lees, JP
  • Poireau, V
  • Tisserand, V
  • Garra Tico, J
  • Grauges, E
  • Martinelli, M
  • Milanes, DA
  • Palano, A
  • Pappagallo, M
  • Eigen, G
  • Stugu, B
  • Brown, DN
  • Kerth, LT
  • Kolomensky, YG
  • Lynch, G
  • Koch, H
  • Schroeder, T
  • Asgeirsson, DJ
  • Hearty, C
  • Mattison, TS
  • McKenna, JA
  • Khan, A
  • Blinov, VE
  • Buzykaev, AR
  • Druzhinin, VP
  • Golubev, VB
  • Kravchenko, EA
  • Onuchin, AP
  • Serednyakov, SI
  • Skovpen, YI
  • Solodov, EP
  • Todyshev, KY
  • Yushkov, AN
  • Bondioli, M
  • Kirkby, D
  • Lankford, AJ
  • Mandelkern, M
  • Stoker, DP
  • Atmacan, H
  • Gary, JW
  • Liu, F
  • Long, O
  • Vitug, GM
  • Campagnari, C
  • Hong, TM
  • Kovalskyi, D
  • Richman, JD
  • West, CA
  • Eisner, AM
  • Kroseberg, J
  • Lockman, WS
  • Martinez, AJ
  • Schalk, T
  • Schumm, BA
  • Seiden, A
  • Cheng, CH
  • Doll, DA
  • Echenard, B
  • Flood, KT
  • Hitlin, DG
  • Ongmongkolkul, P
  • Porter, FC
  • Rakitin, AY
  • Andreassen, R
  • Dubrovin, MS
  • Huard, Z
  • Meadows, BT
  • Sokoloff, MD
  • Sun, L
  • Bloom, PC
  • Ford, WT
  • Gaz, A
  • Nagel, M
  • Nauenberg, U
  • Smith, JG
  • Wagner, SR
  • Ayad, R
  • Toki, WH
  • Spaan, B
  • Kobel, MJ
  • Schubert, KR
  • Schwierz, R
  • Bernard, D
  • Verderi, M
  • Clark, PJ
  • Playfer, S
  • Bettoni, D
  • Bozzi, C
  • Calabrese, R
  • Cibinetto, G
  • Fioravanti, E
  • Garzia, I
  • et al.
Abstract

We study the Υ(3S,2S)→ηΥ(1S) and Υ(3S,2S) →π+π-Υ(1S) transitions with 122×106Υ(3S) and 100×106Υ(2S) mesons collected by the BABAR detector at the PEP-II asymmetric-energy e+e-collider. We measure B[Υ(2S)→ηΥ(1S)]=(2.39±0.31(stat.) ±0.14(syst.))×10-4 and Γ[Υ(2S) →ηΥ(1S)]/Γ[Υ(2S)→π+π-Υ(1S)]=(1.35±0.17(stat.)±0.08(syst.)) ×10-3. We find no evidence for Υ(3S)→ηΥ(1S) and obtain B[Υ(3S)→ηΥ(1S)]<1.0×10-4 and Γ[Υ(3S)→ηΥ(1S)]/Γ[Υ(3S)→π+π-Υ(1S)]<2.3×10-3 as upper limits at the 90% confidence level. We also provide improved measurements of the Υ(2S)-Υ(1S) and Υ(3S)-Υ(1S) mass differences, 562.170±0.007(stat.)±0.088(syst.)MeV/c2 and 893.813±0. 015(stat.)±0.107(syst.)MeV/c2, respectively. © 2011 American Physical Society.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View