Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay
We present a study of hadronic transitions between Υ(mS) (m=4, 3, 2) and Υ(nS) (n=2, 1) resonances based on 347.5fb-1 of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Υ(4S)→ηΥ(1S) decay with a branching fraction B(Υ(4S)→ηΥ(1S))=(1.96±0.06stat±0.09...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2008
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| _version_ | 1797104115097010176 |
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| author | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prencipe, E Prudent, X Tisserand, V Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Cahn, R Jacobsen, R Kerth, LT Kolomensky, Y Kukartsev, G Lynch, G |
| author_facet | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prencipe, E Prudent, X Tisserand, V Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Cahn, R Jacobsen, R Kerth, LT Kolomensky, Y Kukartsev, G Lynch, G |
| author_sort | Aubert, B |
| collection | OXFORD |
| description | We present a study of hadronic transitions between Υ(mS) (m=4, 3, 2) and Υ(nS) (n=2, 1) resonances based on 347.5fb-1 of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Υ(4S)→ηΥ(1S) decay with a branching fraction B(Υ(4S)→ηΥ(1S))=(1.96±0.06stat±0.09syst) ×10-4 and measure the ratio of partial widths Γ(Υ(4S) →ηΥ(1S))/Γ(Υ(4S)→π+π-Υ(1S))=2. 41±0.40stat±0.12syst. We set 90% CL upper limits on the ratios Γ(Υ(2S)→ηΥ(1S))/Γ(Υ(2S)→π+π- Υ(1S))<5.2×10-3 and Γ(Υ(3S)→ηΥ(1S))/ Γ(Υ(3S)→π+π-Υ(1S))<1.9×10-2. We also present new measurements of the ratios Γ(Υ(4S)→π+π-Υ(2S))/ Γ(Υ(4S)→π+π-Υ(1S))=1.16±0.16stat±0. 14syst and Γ(Υ(3S)→π+π-Υ(2S))/Γ(Υ(3S) →π+π-Υ(1S))=0.577±0.026stat±0.060syst. © 2008 The American Physical Society. |
| first_indexed | 2024-03-07T06:29:16Z |
| format | Journal article |
| id | oxford-uuid:f5679bf1-e183-4863-b2f6-0bcb371e6c8e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:29:16Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:f5679bf1-e183-4863-b2f6-0bcb371e6c8e2022-03-27T12:27:11ZStudy of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decayJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f5679bf1-e183-4863-b2f6-0bcb371e6c8eEnglishSymplectic Elements at Oxford2008Aubert, BBona, MKaryotakis, YLees, JPoireau, VPrencipe, EPrudent, XTisserand, VTico, JGrauges, ELopez, LPalano, APappagallo, MEigen, GStugu, BSun, LAbrams, GBattaglia, MBrown, DCahn, RJacobsen, RKerth, LTKolomensky, YKukartsev, GLynch, GWe present a study of hadronic transitions between Υ(mS) (m=4, 3, 2) and Υ(nS) (n=2, 1) resonances based on 347.5fb-1 of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Υ(4S)→ηΥ(1S) decay with a branching fraction B(Υ(4S)→ηΥ(1S))=(1.96±0.06stat±0.09syst) ×10-4 and measure the ratio of partial widths Γ(Υ(4S) →ηΥ(1S))/Γ(Υ(4S)→π+π-Υ(1S))=2. 41±0.40stat±0.12syst. We set 90% CL upper limits on the ratios Γ(Υ(2S)→ηΥ(1S))/Γ(Υ(2S)→π+π- Υ(1S))<5.2×10-3 and Γ(Υ(3S)→ηΥ(1S))/ Γ(Υ(3S)→π+π-Υ(1S))<1.9×10-2. We also present new measurements of the ratios Γ(Υ(4S)→π+π-Υ(2S))/ Γ(Υ(4S)→π+π-Υ(1S))=1.16±0.16stat±0. 14syst and Γ(Υ(3S)→π+π-Υ(2S))/Γ(Υ(3S) →π+π-Υ(1S))=0.577±0.026stat±0.060syst. © 2008 The American Physical Society. |
| spellingShingle | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prencipe, E Prudent, X Tisserand, V Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Cahn, R Jacobsen, R Kerth, LT Kolomensky, Y Kukartsev, G Lynch, G Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title | Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title_full | Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title_fullStr | Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title_full_unstemmed | Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title_short | Study of hadronic transitions between Y states and observation of Y(4S) -> eta Y(1S) decay |
| title_sort | study of hadronic transitions between y states and observation of y 4s gt eta y 1s decay |
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