2018-04-20
09:45 |
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2017-09-05
09:59 |
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2017-07-26
15:11 |
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2017-04-24
11:43 |
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2017-03-14
15:42 |
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2017-01-26
10:27 |
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2017-01-16
12:17 |
First observation of a baryonic $B_s^0$ decay
/LHCb Collaboration
The first observation of a baryonic $B_s^0$ decay, $B^0_s \to p \bar{\Lambda} K^-$, is reported using proton-proton collision data corresponding to an integrated luminosity of 3.0 $\text {fb}^{-1}$recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fraction is measured to be $$ {\cal B}(B^0_s \to p \bar{\Lambda} K^- + \bar{B}^0_s \to p \bar{\Lambda} K^-) = \left[5.48 \,^{+0.82}_{-0.80} \pm 0.60 \pm 0.51 ({\cal B}) \pm 0.32 (f_s/f_d)\right]\times 10^{-6}\,, $$ where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the $B^0 \to p \bar{\Lambda} \pi^-$ decay used for normalisation, and the fourth uncertainty relates to the knowledge of the ratio of $b$-quark hadronisation probabilities $f_s/f_d$. [...]
LHCb-CONF-2016-016; CERN-LHCb-CONF-2016-016.-
Geneva : CERN, 2017 - 16.
Fulltext: LHCb-CONF-2016-016 - PDF; LHCb-CONF-2016-016-figures - ZIP;
In : 9th International Workshop on the CKM Unitarity Triangle, Mumbai, India, 28 Nov - 2 Dec 2016
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2017-01-16
11:53 |
Measurement of $C\!P$ asymmetry in $B_s^0\to D_s^{\mp}K^{\pm}$ decays
/LHCb Collaboration
Reported are measurements of the time-dependent $C\!P$ violating observables in $B_s^0\to D_s^{\mp}K^{\pm}$ decays using a dataset corresponding to $3.0\,\text{fb}^{-1}$ of $pp$ collisions recorded with the LHCb detector in Run 1 of the LHC. We measure $C_f = 0.735 \pm 0.142 \pm 0.048$, $S_f = -0.518 \pm 0.202 \pm 0.073$, $S_{\bar{f}} = -0.496 \pm 0.197 \pm 0.071$, $D_f = 0.395 \pm 0.277 \pm 0.122$, $D_{\bar{f}} = 0.314 \pm 0.274 \pm 0.107$, where the uncertainties are statistical and systematic, respectively. [...]
LHCb-CONF-2016-015; CERN-LHCb-CONF-2016-015.-
Geneva : CERN, 2017 - 21.
Fulltext: LHCb-CONF-2016-015 - PDF; Figs - ZIP;
In : 9th International Workshop on the CKM Unitarity Triangle, Mumbai, India, 28 Nov - 2 Dec 2016
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2017-01-05
12:07 |
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2016-10-14
09:00 |
Evidence for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$
/LHCb Collaboration
A search for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\sqrt{s} = 7$ and $8 TeV$, corresponding to an integrated luminosity of $3 ~ \text {fb}^{-1}$. An excess of events is observed with respect to the background expectations with a signal significance of 4.0 standard deviations [...]
LHCb-CONF-2016-013; CERN-LHCb-CONF-2016-013.-
Geneva : CERN, 2016 - 13.
Fulltext: LHCb-CONF-2016-013-figures - ZIP; LHCb-CONF-2016-013 - PDF;
In : 2016 International Conference on Kaon Physics, Birmingham, United Kingdom, 14 - 17 Sep 2016
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