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

Conference · Wed Aug 25 00:00:00 EDT 2010 · Submitted to Physical Review Letters

OSTI ID:992919

del Amo Sanchez, P; Lees, J P; Poireau, V; Prencipe, E; Tisserand, V; Garra Tico, J; Grauges, E; Martinelli, M; Milanes, D A; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Brown, D N; Chistiakova, M V; Jensen, F; Kerth, L T; Kolomensky, Yu G; Lynch, G ; Osipenkov, I L

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.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 992919
• Report Number(s): SLAC-PUB-14204; arXiv:1007.4646; TRN: US1007856
• Journal Information: Submitted to Physical Review Letters, Conference: Contributed to 35th International Conference on High Energy Physics: ICHEP 2010, Paris, France, 21-28 Jul 2010
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HIGGS BOSONS
NONLUMINOUS MATTER
PHOTONS
PARTICLE PRODUCTION
RESONANCE
SPIN
VECTOR MESONS
Experiment-HEP