Observation of e+e-→ρ+ρ- near s=10.58GeV
We report the first observation of e+e-→ρ+ρ-, in a data sample of 379fb-1 collected with the BABAR detector at the PEP-II e+e- storage ring at center-of-mass energies near s=10.58GeV. We measure a cross section of σ(e+e-→ρ+ρ-)=8.3±0.7(stat)±0.8(syst)fb within the range of |cos θ*|<0.8 and |co...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2008
|
| _version_ | 1797075089636720640 |
|---|---|
| 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 report the first observation of e+e-→ρ+ρ-, in a data sample of 379fb-1 collected with the BABAR detector at the PEP-II e+e- storage ring at center-of-mass energies near s=10.58GeV. We measure a cross section of σ(e+e-→ρ+ρ-)=8.3±0.7(stat)±0.8(syst)fb within the range of |cos θ*|<0.8 and |cos θ±|<0.85, where θ* is the center-of-mass polar angle of the ρ± meson and θ± are the angles in the ρ± rest frame between the direction of the boost from the laboratory frame and the direction of the π±. Assuming production through single-photon annihilation, there are three independent helicity amplitudes. We measure the ratios of their squared moduli to be |F00|2|F10|2|F11|2=0.51±0.14(stat)±0.07(syst)0. 10±0.04(stat)±0.01(syst)0.04±0.03(stat)±0.01(syst). The |F00|2 result is inconsistent with the prediction of 1.0 made by QCD models with a significance of 3.1 standard deviations including systematic uncertainties. © 2008 The American Physical Society. |
| first_indexed | 2024-03-06T23:45:22Z |
| format | Journal article |
| id | oxford-uuid:70b79dff-9c19-49a9-9921-97dea911fcae |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:45:22Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:70b79dff-9c19-49a9-9921-97dea911fcae2022-03-26T19:39:06ZObservation of e+e-→ρ+ρ- near s=10.58GeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:70b79dff-9c19-49a9-9921-97dea911fcaeEnglishSymplectic 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 report the first observation of e+e-→ρ+ρ-, in a data sample of 379fb-1 collected with the BABAR detector at the PEP-II e+e- storage ring at center-of-mass energies near s=10.58GeV. We measure a cross section of σ(e+e-→ρ+ρ-)=8.3±0.7(stat)±0.8(syst)fb within the range of |cos θ*|<0.8 and |cos θ±|<0.85, where θ* is the center-of-mass polar angle of the ρ± meson and θ± are the angles in the ρ± rest frame between the direction of the boost from the laboratory frame and the direction of the π±. Assuming production through single-photon annihilation, there are three independent helicity amplitudes. We measure the ratios of their squared moduli to be |F00|2|F10|2|F11|2=0.51±0.14(stat)±0.07(syst)0. 10±0.04(stat)±0.01(syst)0.04±0.03(stat)±0.01(syst). The |F00|2 result is inconsistent with the prediction of 1.0 made by QCD models with a significance of 3.1 standard deviations including systematic uncertainties. © 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 Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title | Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title_full | Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title_fullStr | Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title_full_unstemmed | Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title_short | Observation of e+e-→ρ+ρ- near s=10.58GeV |
| title_sort | observation of e e ρ ρ near s 10 58gev |
| work_keys_str_mv | AT aubertb observationofeerrnears1058gev AT bonam observationofeerrnears1058gev AT karyotakisy observationofeerrnears1058gev AT leesj observationofeerrnears1058gev AT poireauv observationofeerrnears1058gev AT prencipee observationofeerrnears1058gev AT prudentx observationofeerrnears1058gev AT tisserandv observationofeerrnears1058gev AT ticoj observationofeerrnears1058gev AT graugese observationofeerrnears1058gev AT lopezl observationofeerrnears1058gev AT palanoa observationofeerrnears1058gev AT pappagallom observationofeerrnears1058gev AT eigeng observationofeerrnears1058gev AT stugub observationofeerrnears1058gev AT sunl observationofeerrnears1058gev AT abramsg observationofeerrnears1058gev AT battagliam observationofeerrnears1058gev AT brownd observationofeerrnears1058gev AT cahnr observationofeerrnears1058gev AT jacobsenr observationofeerrnears1058gev AT kerthlt observationofeerrnears1058gev AT kolomenskyy observationofeerrnears1058gev AT kukartsevg observationofeerrnears1058gev AT lynchg observationofeerrnears1058gev |