Search for the B{sub c} meson in hadronic Z{sup 0} decays using the OPAL detector at LEP

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A search for decays of the B{sub c} meson was performed using data collected from 1990--1995 with the OPAL detector on or near the Z{sup 0} peak at LEP. The decay channels B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, B{sub c}{sup +} {r_arrow} J/{psi}a{sub 1}{sup +} and B{sub c}{sup +} {r_arrow} J/{psi}{ell}{sup +}{nu} were investigated, where {ell} denotes an electron or a muon. Two candidates are observed in the mode B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, with an estimated background of (0.63 {+-} 0.20) events. The weighted mean of the masses of the two candidates is (6.32 {+-} 0.06) GeV/c{sup 2}, ... continued below

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145 p.

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Herndon, M.F. January 1, 1999.

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Description

A search for decays of the B{sub c} meson was performed using data collected from 1990--1995 with the OPAL detector on or near the Z{sup 0} peak at LEP. The decay channels B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, B{sub c}{sup +} {r_arrow} J/{psi}a{sub 1}{sup +} and B{sub c}{sup +} {r_arrow} J/{psi}{ell}{sup +}{nu} were investigated, where {ell} denotes an electron or a muon. Two candidates are observed in the mode B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, with an estimated background of (0.63 {+-} 0.20) events. The weighted mean of the masses of the two candidates is (6.32 {+-} 0.06) GeV/c{sup 2}, which is consistent with the predicted mass of the B{sub c} meson. One candidate event is observed in the mode B{sub c}{sup +} {r_arrow} J/{psi}{ell}{sup +}{nu}, with an estimated background of (0.82 {+-} 0.19) events. No candidate events are observed in the B{sub c}{sup +} {r_arrow} J/{psi}a{sub 1}{sup +} decay mode, with an estimated background of (1.10 {+-} 0.22) events. Upper bounds at the 90% confidence level are set on the production rates for these processes.

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145 p.

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INIS; OSTI as DE99001320

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE99001320
  • Report No.: DOE/ER/41015--T1
  • Grant Number: FG02-97ER41015
  • DOI: 10.2172/304139 | External Link
  • Office of Scientific & Technical Information Report Number: 304139
  • Archival Resource Key: ark:/67531/metadc686452

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  • January 1, 1999

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 5, 2015, 3:44 p.m.

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Herndon, M.F. Search for the B{sub c} meson in hadronic Z{sup 0} decays using the OPAL detector at LEP, thesis or dissertation, January 1, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc686452/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.