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Últimas adquisiciones:
2021-04-19
12:27
Search for the doubly heavy baryons $\it{\Xi}_{bc}^{\rm0}$ and $\it{\Omega}_{bc}^{\rm0}$ decaying to $\it{\Lambda_{c}^{+}\pi^{-}}$ and $\it{\Xi_{c}^{+}\pi^{-}}$
/ LHCb Collaboration
A search for the doubly heavy baryons $\it{\Xi}_{bc}^{\rm0}$ and $\it{\Omega}_{bc}^{\rm0}$ is performed using $pp$ collision data collected with the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of $13TeV$, corresponding to an integrated luminosity of 5.2$fb^{-1}$. [...]
arXiv:2104.04759
;
CERN-EP-2021-046
;
LHCB-PAPER-2021-002
.
- 2021.
Fulltext
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2021-04-15
11:14
Precise determination of the $B^0_s$-$\overline{B}^0_s$ oscillation frequency
/ LHCb Collaboration
Mesons comprising a beauty quark and a strange quark can oscillate between particle ($B^0_s$) and antiparticle ($\overline{B}^0_s$) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, $\Delta m_{s}$. [...]
arXiv:2104.04421
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CERN-EP-2021-047
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LHCB-PAPER-2021-005
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- 2021.
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2021-03-22
14:52
Test of lepton universality in beauty-quark decays
/ LHCb Collaboration
The Standard Model of particle physics currently provides our best description of fundamental particles and their interactions. [...]
arXiv:2103.11769
;
LHCb-PAPER-2021-004
;
CERN-EP-2021-042
;
LHCB-PAPER-2021-004
.
- 2021. - 36 p.
CERN News article
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LHCb News article
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Interactions.org article
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BBC News article
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Scientific American article
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2021-03-22
11:02
Search for $CP$ violation in $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+}\rightarrow h^{+}\eta$ decays
/ LHCb Collaboration
Searches for $CP$ violation in the two-body decays $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+} \rightarrow h^{+}\eta$ (where $h^{+}$ denotes a $\pi^{+}$ or $K^{+}$ meson) are performed using $pp$ collision data collected by the LHCb experiment corresponding to either 9 fb$^{-1}$ or 6 fb$^{-1}$ of integrated luminosity. [...]
arXiv:2103.11058
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LHCb-PAPER-2021-001
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CERN-EP-2021-036
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LHCB-PAPER-2021-001
.
- 2021. - 25 p, 25 p.
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2021-03-15
11:44
Measurement of prompt-production cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ in $p$Pb collisions at $\sqrt{s_{NN}}$ = 8.16 TeV
/ LHCb Collaboration
This Letter reports the first measurement of prompt $\chi_{c1}$ and $\chi_{c2}$ charmonium production in nuclear collisions at LHC energies. [...]
arXiv:2103.07349
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LHCb-PAPER-2020-048
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CERN-EP-2021-024F
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LHCB-PAPER-2020-048
.
- 2021. - 18 p.
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2021-03-12
14:31
Precise measurement of the $f_s/f_d$ ratio of fragmentation fractions and of $B^0_s$ decay branching fractions
/ LHCb Collaboration
The ratio of the $B^0_s$ and $B^0$ fragmentation fractions, $f_s/f_d$, in proton-proton collisions at the LHC, is obtained as a function of $B$-meson transverse momentum and collision centre-of-mass energy from the combined analysis of different $B$-decay channels measured by the LHCb experiment. [...]
arXiv:2103.06810
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LHCb-PAPER-2020-046
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CERN-EP-2021-027
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LHCB-PAPER-2020-046
.
- 2021. - 33 p.
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2021-03-09
15:28
Observation of the decay $\Lambda_{b}^0\to\chi_{c1} p \pi^-$
/ LHCb Collaboration
The Cabibbo-suppressed decay $\Lambda_b^0\rightarrow\chi_{c1}p\pi^-$ is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6fb$^{-1}$, collected with the LHCb detector at a centre-of-mass energy of 13TeV. [...]
arXiv:2103.04949
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CERN-EP-2021-037
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LHCb-PAPER-2021-003
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LHCB-PAPER-2021-003
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- 2021. - 21 p.
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2021-02-05
19:42
Observation of new resonances decaying to $J/ \psi K^{+}$and $J \psi\phi$
/ LHCb Collaboration
The first observation of exotic states with a new quark content ccus decaying to the $J/\psi K^{+}$ final state is reported with high significance from an amplitude analysis of the $B^{+} \to J/\psi \phi K^{+} $ decay [...]
arXiv:2103.01803
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LHCb-PAPER-2020-044
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CERN-EP-2021-025
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LHCB-PAPER-2020-044
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- 2021. - 18 p.
Additional information for the analysis
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2021-01-05
10:04
Angular analysis of the $B^{+}\rightarrow K^{\ast+}\mu^{+}\mu^{-}$ decay
We present an angular analysis of the $B^{+}\rightarrow K^{\ast+}(\rightarrow K_{S}^{0}\pi^{+})\mu^{+}\mu^{-}$ decay using 9$\,\mbox{fb}^{-1}$ of $pp$ collision data collected with the LHCb experiment. [...]
arXiv:2012.13241
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LHCb-PAPER-2020-041
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CERN-EP-2020-239
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- 2021. - 35 p.
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2021-01-05
09:46
Observation of the $B_s^0 \rightarrow D^{\ast \pm} D^{\mp}$ decay
/ LHCb Collaboration
A search for the $B^0_s \!\rightarrow D^{*\pm} D^\mp$ decay is performed using proton-proton collision data at centre-of-mass energies of $7$, $8$ and $13\,\text{TeV}$ collected by the LHCb experiment, corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$. The decay is observed with a high significance and its branching fraction relative to the $B^0 \!\rightarrow D^{*\pm} D^\mp$ decay is measured to be \begin{align*} \frac{\mathcal{B}(B_s^0 \rightarrow D^{\ast \pm} D^{\mp}) }{\mathcal{B}(B^0 \rightarrow D^{\ast \pm} D^{\mp}) } = 0.137 \pm 0.017 \pm 0.002 \pm 0.006 \,, \end{align*} where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the $B_s^0$ and $B^0$ hadronisation fractions..
arXiv:2012.11341; LHCb-PAPER-2020-037; CERN-EP-2020-230.-
2021-03-09 - 19 p.
- Published in :
JHEP
2103 (2021) 099
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2012.11341
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LHCb-PAPER-2020-037
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