1981
DOI: 10.1103/physrevlett.46.84
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Evidence for New-Flavor Production at theϒ(4S)

Abstract: An enhancement has been observed in the inclusive cross section for direct single electrons produced in e*e~ annihilations at the T(4S). This is interpreted as evidence for a new weakly decaying particle, the B meson. A branching ratio for B -Xev of ll3± 3 (±3)]% is inferred, where the first set of errors is statistical and the estimated systematic error is enclosed in parentheses.PACS numbers: 14.40.Pe, 13.20.Jf, 13.65.+ iThe recently discovered resonance in e*e~ annihilations at 10.55 GeV total energy 1 ' 2 … Show more

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Cited by 97 publications
(14 citation statements)
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“…The last two decades have witnessed important advances in flavour physics and in particular heavy-meson decays. From the first observation of a B meson by the CLEO Collaboration in 1981 at the Cornell Electron Storage Ring [1] (and their ongoing D-meson research program) to the dedicated B-physics facilities at SLAC in California and KEK in Japan, much progress has been made. Of course, while B physics is the main focus of the Collaborations Belle at KEK and BaBar at SLAC, and of the CDF experiment at Fermilab, considerable efforts have also been devoted to studies of D-meson decays, charmonium and τ physics.…”
Section: Flavour Physics and Strong Phasesmentioning
confidence: 99%
“…The last two decades have witnessed important advances in flavour physics and in particular heavy-meson decays. From the first observation of a B meson by the CLEO Collaboration in 1981 at the Cornell Electron Storage Ring [1] (and their ongoing D-meson research program) to the dedicated B-physics facilities at SLAC in California and KEK in Japan, much progress has been made. Of course, while B physics is the main focus of the Collaborations Belle at KEK and BaBar at SLAC, and of the CDF experiment at Fermilab, considerable efforts have also been devoted to studies of D-meson decays, charmonium and τ physics.…”
Section: Flavour Physics and Strong Phasesmentioning
confidence: 99%
“…Since the discovery of the J=Ψ and ϒ resonances in the 1970s, heavy meson physics (including the physics of charmonia [1,2], bottomonia [3,4], open-charm [5,6], and open-bottom [7][8][9] mesons) has been extensively studied and still is the subject of intensive theoretical and experimental research [10,11]. Recently, both the charmonium and bottomonium spectra have been enriched by the discovery of new particles [10,11] [10,16], Dð2740Þ 0 [10,17], and B J ð5970Þ 0 [10,18].…”
Section: Introductionmentioning
confidence: 99%
“…The Υ is a bound state with a net bottom quantum number of zero, and thus an example of "hidden beauty", in analogy to the J/ψ meson, the cc "hidden charm" bound state discovered three years earlier. The first B meson with non-zero bottom quantum number was observed shortly thereafter in 1981 [20]. The first observation of the heavy gauge bosons W ± and Z 0 occurred in 1983 [21].…”
Section: General Historical Backgroundmentioning
confidence: 98%