A Study of 3- and 4-Body Hadronic Final States Using Initial State Radiation with BaBar

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A study of several 3- and 4-body hadronic final states ({pi}{sup +}{pi}{sup -}{pi}{sup 0}, {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}{pi}{sup +}{pi}{sup -} and K{sup +}K{sup -}K{sup +}K{sup -}) accompanied by hard photon is presented. These states are produced from e{sup +}e{sup -} collisions at the c.m. energy near {Upsilon}(4S) resonance using 90 fb{sup -1} data sample collected with the BABAR detector at the PEP-II collider. The invariant mass of the hadronic final state determines the virtual photon energy, so that data can be compared with direct e{sup +}e{sup -} cross sections. The cross sections for the above final ... continued below

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5 pages

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Solodov, E.P. & /Novosibirsk, IYF October 31, 2005.

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A study of several 3- and 4-body hadronic final states ({pi}{sup +}{pi}{sup -}{pi}{sup 0}, {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}{pi}{sup +}{pi}{sup -} and K{sup +}K{sup -}K{sup +}K{sup -}) accompanied by hard photon is presented. These states are produced from e{sup +}e{sup -} collisions at the c.m. energy near {Upsilon}(4S) resonance using 90 fb{sup -1} data sample collected with the BABAR detector at the PEP-II collider. The invariant mass of the hadronic final state determines the virtual photon energy, so that data can be compared with direct e{sup +}e{sup -} cross sections. The cross sections for the above final states have been obtained from the threshold to 4.5 GeV with about 5% systematic errors. The accuracy of the results are comparable with the best direct e{sup +}e{sup -} results overall and with much better precision in 1.4-2.5 GeV region where very few data are available. In addition to light meson spectroscopy these data can be used to improve the determination of R--the ratio of e{sup +}e{sup -} {yields} hadrons cross section to e{sup +}e{sup -} {yields} {mu}{sup +}{mu}{sup -}--and thereby to impact the understanding of recent (g - 2){sub {mu}} measurement. The ISR technique also gives access to J/{psi} production. Measurements of branching ratios into 3- and 4-body final states given above are made to a level of precision that is typically better than that obtained in the combined earlier measurements.

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5 pages

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  • Prepared for 32nd International Conference on High-Energy Physics (ICHEP 04), Beijing, China, 16-22 Aug 2004

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  • Report No.: SLAC-PUB-11552
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 878068
  • Archival Resource Key: ark:/67531/metadc879224

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  • October 31, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 2, 2016, 12:57 p.m.

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Solodov, E.P. & /Novosibirsk, IYF. A Study of 3- and 4-Body Hadronic Final States Using Initial State Radiation with BaBar, article, October 31, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc879224/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.