
The Library
Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay
Tools
BABAR Collaboration (Including:
). (2008) Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.78 (No.11). article no.112002. doi:10.1103/PhysRevD.78.112002 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevD.78.112002
Abstract
We present a study of hadronic transitions between Y(mS) (m = 4, 3, 2) and Y(nS) (n = 2, 1) resonances based on 347.5 fb(-1) of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Y(4S) -> eta Y(1S) decay with a branching fraction B(Y(4S) -> eta Y(1S) = (1.96 +/- 0.06(stat) +/- 0.09(syst)) X 10(-4) and measure the ratio of partial widths Gamma(Y(4S) -> eta Y(1S))/Gamma(Y(4S) -> pi(+)pi Y-(1S)) = 2.41 +/- 0.40(stat) +/- 0.12(syst). We set 90% CL upper limits on the ratios Gamma(Y(2S) -> eta Y(1S))/Gamma(Y(2S) -> pi(+)pi Y-(1S) < 5.2 X 10(-3) and Gamma(Y(3S) -> eta Y(1S)/Gamma(Y(3S) -> pi(+)pi Y-(1S)) < 1.9 X 10(-2). We also present new measurements of the ratios Gamma(Y(4S) -> pi(+)pi Y-(2S)/Gamma(Y(4S) -> pi(+)pi Y-(1S)) = 1.16 +/- 0.16(stat) +/- 0.14(syst) and Gamma(Y(3S) -> pi(+)pi Y-(1S)) = 0.577 +/- 0.026(stat) +/- 0.060(syst).
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
||||
Divisions: | Faculty of Science > Physics | ||||
Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1550-7998 | ||||
Official Date: | December 2008 | ||||
Dates: |
|
||||
Volume: | Vol.78 | ||||
Number: | No.11 | ||||
Number of Pages: | 11 | ||||
Page Range: | article no.112002 | ||||
DOI: | 10.1103/PhysRevD.78.112002 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
![]() |
View Item |