Header

UZH-Logo

Maintenance Infos

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


BABAR Collection; Lees, J P; Poireau, V; Tisserand, V; Snoek, H; et al (2011). Study of Υ(3S,2S)→ηΥ(1S) and Υ(3S,2S)→π+π-Υ(1S) hadronic transitions. Physical Review D (Particles, Fields, Gravitation and Cosmology), 84(9):092003.

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.

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.

Statistics

Citations

11 citations in Web of Science®
14 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

46 downloads since deposited on 14 Mar 2013
12 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:14 Mar 2013 07:59
Last Modified:07 Dec 2017 20:16
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:https://doi.org/10.1103/PhysRevD.84.092003

Download

Download PDF  'Study of Υ(3S,2S)→ηΥ(1S) and Υ(3S,2S)→π+π-Υ(1S) hadronic transitions'.
Preview
Filetype: PDF
Size: 288kB
View at publisher