Measurement of the E+ E- to Pi+ Pi- Pi+ Pi-, K+ K- Pi+ Pi-, K+ K- K+ K- Cross Sections Using Initial State Radiation at BaBar
Title | Measurement of the E+ E- to Pi+ Pi- Pi+ Pi-, K+ K- Pi+ Pi-, K+ K- K+ K- Cross Sections Using Initial State Radiation at BaBar PDF eBook |
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Release | 2005 |
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First results of a study of the ee− → ?+?−?+?−? process with hard photon emitted from initial state are presented. About 60000 fully reconstructed events have been selected based on 89.3 fb−1 of BABAR data. The invariant mass of the hadronic final state defines the effective collision c.m. energy, and so BABAR ISR data can be compared to the relevant direct e+e− measurements. From obtained 4? mass spectrum we evaluate e+e− → ?+?−?+?− cross section for the range of c.m.s. energy from 0.6 to 4.5 GeV. The systematic error of the cross section measurement is 5% and comparable with the best e+e− data. The cross sections for identified 2K2? and 4K final states also have been presented.
Measurement of the E+e- → Pi+pi-pi+pi- Cross Section Using Initial State Radiation at BABAR
Title | Measurement of the E+e- → Pi+pi-pi+pi- Cross Section Using Initial State Radiation at BABAR PDF eBook |
Author | Andreas Hafner |
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Release | 2012 |
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Measurement of the e+ e- → pi+ pi- 2pi0 and e+ e- → pi+ pi- 3pi0 cross sections using initial state radiation at BaBar
Title | Measurement of the e+ e- → pi+ pi- 2pi0 and e+ e- → pi+ pi- 3pi0 cross sections using initial state radiation at BaBar PDF eBook |
Author | Konrad Griessinger |
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Release | 2016 |
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Measuerement of the E+e- → Π+π-π+π- [pi +pi -pi +pi -] Cross Section Using Initial State Radiation at BABAR
Title | Measuerement of the E+e- → Π+π-π+π- [pi +pi -pi +pi -] Cross Section Using Initial State Radiation at BABAR PDF eBook |
Author | Andreas Hafner |
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Pages | 164 |
Release | 2012 |
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Precise Measurement of the E+ E- \to Pi+ Pi-? Cross Section with the Initial-State Radiation Method at BABAR.
Title | Precise Measurement of the E+ E- \to Pi+ Pi-? Cross Section with the Initial-State Radiation Method at BABAR. PDF eBook |
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Pages | 58 |
Release | 2013 |
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Initial-State Radiation Measurement of the E+e- -] Pi+pi-pi+pi- Cross Section
Title | Initial-State Radiation Measurement of the E+e- -] Pi+pi-pi+pi- Cross Section PDF eBook |
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Pages | 19 |
Release | 2013 |
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The Epem to Pi+ Pi- Pi+ Pi-, K+ K- Pi+ Pi-, and K+ K- K+ K- Cross Sections at Center-of-Mass Energies 0.5--4.5G̃eV Measured with Initial-State Radiation
Title | The Epem to Pi+ Pi- Pi+ Pi-, K+ K- Pi+ Pi-, and K+ K- K+ K- Cross Sections at Center-of-Mass Energies 0.5--4.5G̃eV Measured with Initial-State Radiation PDF eBook |
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Release | 2005 |
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We study the process ee− 2!?+?−?+?−?, with a hard photon radiated from the initial state. About 60,000 fully reconstructed events have been selected from 89 fb−1 of BABAR data. The invariant mass of the hadronic final state defines the effective e+e− center-of-mass energy, so that these data can be compared with the corresponding direct e+e− measurements. From the 4?-mass spectrum, the cross section for the process e+e− 2!?+?−?+?− is measured for center-of-mass energies from 0.6 to 4.5 GeV. The uncertainty in the cross section measurement is typically 5%. We also measure the cross sections for the final states K+K−?+− and K+K−K+K−. We observe the J/? in all three final states and measure the corresponding branching fractions. We search for X(3872) in J/?(2!?+?−)?+?− and obtain an upper limit on the product of the e+e− width of the X(3872) and the branching fraction for X(3872) 2!J/??+?−.