Updated average $f_s/f_d$ $b$-hadron production fraction ratio for 7 TeV $pp$ collisions
[to restricted-access page]Abstract
Improved knowledge of the branching fraction of the decay $D_{s}^{-} \rightarrow K^{+}K^{-}\pi^{-}$ and of the $B$ meson lifetimes has an impact on the measurement of the ratio of $ B ^0_ s $ and $ B ^0$ meson production cross-sections, $f_{s}/f_{d}$, measured at LHCb . This note reports a new combination of the LHCb measurements of $f_s/f_d$, resulting in $ f_s/f_d = 0.259 \pm 0.015$.
Tables and captions
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Updated measurements of the branching fraction of the $D_{s}^{-} \rightarrow K^{+}K^{-}\pi^{-}$ decay and their average used in the combination. |
Table_1.pdf [46 KiB] HiDef png [76 KiB] Thumbnail [36 KiB] tex code |
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{Updated measurements of the $B$ meson lifetimes [7]}. |
Table_2.pdf [44 KiB] HiDef png [48 KiB] Thumbnail [22 KiB] tex code |
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Uncorrelated uncertainties of the two LHCb measurements of $ f_s/f_d$ [3,5]. The particle identification uncertainty present in both measurements is considered fully uncorrelated since the semileptonic measurement was performed analyzing an integrated luminosity of $3$ $ pb^{-1}$ acquired in 2010, while the hadronic measurement was performed analyzing an integrated luminosity of $1$ $ fb^{-1}$ acquired in 2011. |
Table_3.pdf [58 KiB] HiDef png [124 KiB] Thumbnail [57 KiB] tex code |
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Correlated uncertainties of the two LHCb measurements of $ f_s/f_d$ [3,5]. |
Table_4.pdf [44 KiB] HiDef png [54 KiB] Thumbnail [24 KiB] tex code |
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![HiDef png [76 KiB]](Directory_LHCb-CONF-2013-011/hidef_Table_1.png){kind=link}
![HiDef png [48 KiB]](Directory_LHCb-CONF-2013-011/hidef_Table_2.png){kind=link}
![HiDef png [124 KiB]](Directory_LHCb-CONF-2013-011/hidef_Table_3.png){kind=link}
![HiDef png [54 KiB]](Directory_LHCb-CONF-2013-011/hidef_Table_4.png){kind=link}
Created on 02 May 2024.