Observation of a narrow mass state decaying into Υ(1S)+γ in pp[over ¯] collisions at sqrt[s]=1.96 TeV

Journal Article · Wed Aug 01 00:00:00 EDT 2012 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.86.031103· OSTI ID:1038947

Abazov, Victor Mukhamedovich

Using data corresponding to an integrated luminosity of 1.3 fb{sup -1}, we observe a narrow mass state decaying into {Upsilon}(1S) + {gamma}, where the {Upsilon}(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard deviations. The mass of the state is centered at 10.551 {+-} 0.014(stat.) {+-} 0.017(syst.) GeV/c{sup 2}, which is consistent with that of the state recently observed by the ATLAS Collaboration.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: D0 Collaboration
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1038947
• Report Number(s): FERMILAB-PUB-12-084-E; PRVDAQ; ArticleNumber: 031103; TRN: US1202060
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 86, Issue 3; ISSN 1550-7998
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
LUMINOSITY
MESONS
MUONS
PHOTONS