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2023-02-07
10:43
Measurement of the ratios of branching fractions $\mathcal{R}(D^{*})$ and $\mathcal{R}(D^{0})$
The ratios of branching fractions $\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu})$ and $\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. [...]
CERN-EP-2022-284 ; LHCB-PAPER-2022-039. - 2023.
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2023-01-26
15:26
A study of $C\!P$ violation in the decays $B^\pm\to[K^+K^-\pi^+\pi^-]_D h^{\pm}$ ($h = K, \pi$) and $B^\pm\to[\pi^+\pi^-\pi^+\pi^-]_D h^{\pm}$
The first study of $C\!P$ violation in the decay mode $B^\pm\to[K^+K^-\pi^+\pi^-]_D h^{\pm}$, with $h=K,\pi$, is presented, exploiting a data sample of proton-proton collisions collected by the LHCb experiment that corresponds to an integrated luminosity of $9$ fb$^{-1}$. [...]
LHCb-PAPER-2022-037 ; CERN-EP-2022-285 ; arXiv:2301.10328 ; LHCB-PAPER-2022-037. - 2023.
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2023-01-12
15:46
Evidence of a $J/\psi K_{\rm S}^0$ structure in $B^0 \to J/\psi \phi K_{\rm S}^0$ decays
An amplitude analysis of $B^0 \to J/\psi \phi K_{\rm S}^0$ decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 ${\rm fb}^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. [...]
arXiv:2301.04899 ; LHCb-PAPER-2022-040 ; CERN-EP-2022-258 ; LHCB-PAPER-2022-040. - 2023.
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2023-01-05
14:26
First observation and branching fraction measurement of the $\Lambda_b^0\to D_s^- p$ decay
The first observation of the $\Lambda_b^0\to D_s^- p$ decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of ${\sqrt{s}=13 \,\textrm{TeV}}$, corresponding to a total integrated luminosity of $6\,\textrm{fb}^{-1}$. [...]
arXiv:2212.12574 ; LHCb-PAPER-2022-038 ; CERN-EP-2022-272 ; LHCB-PAPER-2022-038. - 2023. - 18 p, 18 p.
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2022-12-20
10:37
Test of lepton universality in $b \rightarrow s \ell^+ \ell^-$ decays
The first simultaneous test of muon-electron universality using $B^{+}\rightarrow K^+\ell^+ \ell^−$ and $B^{0} \rightarrow K^{*0} \ell^{+} \ell^{−}$ decays is performed, in two ranges of the dilepton invariant-mass squared, $q^{2}$. [...]
arXiv:2212.09152 ; LHCb-PAPER-2022-046 ; CERN-EP-2022-277. - 2022. - 15 p, 15 p.
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2022-12-20
09:24
Measurement of lepton universality parameters in $B^+\to K^+\ell^+\ell^-$ and $B^0\to K^{*0}\ell^+\ell^-$ decays
A simultaneous analysis of the $B^+\to K^+\ell^+\ell^-$ and $B^0\to K^{*0}\ell^+\ell^-$ decays is performed to test muon-electron universality in two ranges of the square of the dilepton invariant mass, $q^2$. [...]
arXiv:2212.09153 ; LHCb-PAPER-2022-045 ; CERN-EP-2022-278 ; LHCB-PAPER-2022-045. - 2022.
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2022-12-15
08:36
Search for $K^0_{\mathrm{S(L)}}\to\mu^+\mu^-\mu^+\mu^-$ decays at LHCb
A search for $K_{\textrm{S(L)}}^0\rightarrow\mu^{+}\mu^{-}\mu^{+}\mu^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.1 $\text{fb}^{-1}$. [...]
arXiv:2212.04977 ; CERN-EP-2022-255 ; LHCb-PAPER-2022-035 ; LHCB-PAPER-2022-035. - 2022. - 13 p, 13 p.
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2022-12-14
14:41
Search for the rare decays $W^{+}\rightarrow{D^{+}_{s}\gamma}$ and $Z\rightarrow{D^{0}\gamma}$ at LHCb
A search for the rare decays $W^{+}\rightarrow{D^{+}_{s}\gamma}$ and $Z\rightarrow{D^{0}\gamma}$ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 2.0 $\textrm{fb}^{-1}$. [...]
arXiv:2212.07120 ; CERN-EP-2022-252 ; LHCb-PAPER-2022-033 ; LHCB-PAPER-2022-033. - 2022. - 15 p, 15 p.
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2022-12-07
09:11
Amplitude analysis of $B^0 \rightarrow \overline{D}^0 D_s^+ \pi^-$ and $B^+ \rightarrow D^- D_s^+ \pi^+$ decays
Resonant contributions in $B^0 \rightarrow \overline{D}{}^0 D^+_s\pi^-$ and $B^+\rightarrow D^- D^+_s\pi^+$ decays are determined with an amplitude analysis, which is performed both separately and simultaneously, where in the latter case isospin symmetry between the decays is assumed. [...]
arXiv:2212.02717 ; LHCb-PAPER-2022-027 ; CERN-EP-2022-246 ; LHCB-PAPER-2022-027. - 2022. - 39 p, 39 p.
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2022-12-07
09:00
First observation of a doubly charged tetraquark and its neutral partner
A combined amplitude analysis is performed for the decays $B^0 \rightarrow \overline{D}{}^0 D^+_s\pi^-$ and $B^+\rightarrow D^- D^+_s\pi^+$, which are related by isospin symmetry. [...]
arXiv:2212.02716 ; LHCb-PAPER-2022-026 ; CERN-EP-2022-239 ; LHCB-PAPER-2022-026. - 2022. - 14 p, 14 p.
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