Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)

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We search for single-photon decays of the {Upsilon}(1S) resonance, {Upsilon} {yields} {gamma} + invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A{sup 0}, or a pair of dark matter particles, {chi}{bar {chi}}. Both A{sup 0} and {chi} are assumed to have zero spin. We tag {Upsilon}(1S) decays with a dipion transition {Upsilon}(2S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(1S) and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range m{sub A{sup o}} {le} 9.2GeV and m{sub {chi}} {le} 4.5GeV ... continued below

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7 pages

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del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP et al. August 25, 2010.

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We search for single-photon decays of the {Upsilon}(1S) resonance, {Upsilon} {yields} {gamma} + invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A{sup 0}, or a pair of dark matter particles, {chi}{bar {chi}}. Both A{sup 0} and {chi} are assumed to have zero spin. We tag {Upsilon}(1S) decays with a dipion transition {Upsilon}(2S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(1S) and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range m{sub A{sup o}} {le} 9.2GeV and m{sub {chi}} {le} 4.5GeV in the sample of 98 x 10{sup 6} {Upsilon}(2S) decays collected with the BABAR detector and set stringent limits on new physics models that contain light dark matter states.

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7 pages

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  • Journal Name: Submitted to Physical Review Letters; Conference: Contributed to 35th International Conference on High Energy Physics: ICHEP 2010, Paris, France, 21-28 Jul 2010

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  • Report No.: SLAC-PUB-14204
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 992919
  • Archival Resource Key: ark:/67531/metadc1012858

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  • August 25, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 3, 2017, 1:49 p.m.

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del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP et al. Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S), article, August 25, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1012858/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.