Information
LHCb-PAPER-2014-039
CERN-PH-EP-2014-187
arXiv:1408.0971 [PDF]
(Submitted on 05 Aug 2014)
Phys. Rev. Lett. 113 (2014) 153003
Inspire 1309880
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Abstract
A baryonic decay of the $B_c^+$ meson, $B_c^+\to J/\psi p\overline{p}\pi^+$, is observed for the first time, with a significance of $7.3$ standard deviations, in $pp$ collision data collected with the LHCb detector and corresponding to an integrated luminosity of $3.0$ fb$^{-1}$ taken at center-of-mass energies of $7$ and $8$ $\mathrm{TeV}$. With the $B_c^+\to J/\psi \pi^+$ decay as normalization channel, the ratio of branching fractions is measured to be \begin{equation*} \frac{\mathcal{B}(B_c^+\to J/\psi p\overline{p}\pi^+)}{\mathcal{B}(B_c^+\to J/\psi \pi^+)} = 0.143^{ + 0.039}_{ - 0.034} (\mathrm{stat})\pm0.013 (\mathrm{syst}). \end{equation*} The mass of the $B_c^+$ meson is determined as $M(B_c^+)=6274.0\pm1.8 (\mathrm{stat})\pm0.4 (\mathrm{syst}) \mathrm{MeV}/c^2$, using the $B_c^+\to J/\psi p\overline{p}\pi^+$ channel.
Figures and captions
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Invariant mass distribution for (left) $ B _ c ^+ \rightarrow { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu} p \overline{p}\pi ^+ $ and (right) $ B _ c ^+ \rightarrow { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu} \pi ^+ $ candidates. The superimposed curves show the fitted contributions from signal (dashed), combinatorial background (dotted), misidentification background (dot-dashed) and their sum (solid). |
Fig1a.pdf [18 KiB] HiDef png [238 KiB] Thumbnail [189 KiB] *.C file |
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Fig1b.pdf [23 KiB] HiDef png [240 KiB] Thumbnail [187 KiB] *.C file |
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Invariant mass distributions of (left) $M(p\overline{p})$ and (right) $M(p\pi ^+ )$ for data (dots) and simulation (solid) using uniform phase-space model, for $ B _ c ^+ \rightarrow { J \mskip -3mu/\mskip -2mu\psi \mskip 2mu} p \overline{p}\pi ^+ $ decay. |
Fig2.pdf [15 KiB] HiDef png [147 KiB] Thumbnail [141 KiB] *.C file |
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Animated gif made out of all figures. |
PAPER-2014-039.gif Thumbnail |
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![HiDef png [238 KiB]](Directory_LHCb-PAPER-2014-039/hidef_Fig1a.png){kind=link}
![HiDef png [240 KiB]](Directory_LHCb-PAPER-2014-039/hidef_Fig1b.png){kind=link}
![HiDef png [147 KiB]](Directory_LHCb-PAPER-2014-039/hidef_Fig2.png){kind=link}
Tables and captions
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Systematic uncertainties for the $ B _ c ^+ $ mass measurement. |
Table_1.pdf [30 KiB] HiDef png [68 KiB] Thumbnail [29 KiB] tex code |
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Systematic uncertainties (in percent) for the relative branching fraction measurement. |
Table_2.pdf [32 KiB] HiDef png [153 KiB] Thumbnail [62 KiB] tex code |
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![HiDef png [68 KiB]](Directory_LHCb-PAPER-2014-039/hidef_Table_1.png){kind=link}
![HiDef png [153 KiB]](Directory_LHCb-PAPER-2014-039/hidef_Table_2.png){kind=link}
Supplementary Material [file]
| Supplementary material full pdf |
supple[..].pdf [92 KiB] |
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This ZIP file contains supplemetary material for the publication LHCb-PAPER-2014-039. The files are: Supplementary.pdf : Decribing the thee LHCb measurements of Bc+ mass, and their average. *.pdf, *.png, *.eps, *.C : The results Bc+ mass measurements in variuous formats supp.tex: main latex file used to produce supplementary.pdf, including mass result table |
bcComp.pdf [4 KiB] HiDef png [195 KiB] Thumbnail [171 KiB] *C file |
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![HiDef png [195 KiB]](Directory_LHCb-PAPER-2014-039/supplementary/hidef_bcComp.png){kind=link}
Created on 26 April 2024.