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EP Preprints

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2018-08-24
11:51
Search for lepton-flavour-violating decays of Higgs-like bosons / LHCb Collaboration
A search is presented for a Higgs-like boson with mass in the range 45 to 195 GeV/$c^2$ decaying into a muon and a tau lepton. [...]
arXiv:1808.07135 ; CERN-EP-2018-210 ; LHCb-PAPER-2018-030 ; LHCB-PAPER-2018-030. - 2018. - 20 p.
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2018-08-21
10:21
Measurement of antiproton production in ${\rm p He}$ collisions at $\sqrt{s_{NN}}=110$ GeV / LHCb Collaboration
The cross-section for prompt antiproton production in collisions of protons with an energy of $6.5$ TeV incident on helium nuclei at rest is measured with the LHCb experiment from a data set corresponding to an integrated luminosity of $0.5 ~~\rm nb^{-1}$. [...]
arXiv:1808.06127 ; LHCb-PAPER-2018-031 ; CERN-EP-2018-217 ; LHCB-PAPER-2018-031. - 2018. - 22 p.
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2018-08-03
09:58
Angular moments of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ at low hadronic recoil / LHCb Collaboration
An analysis of the angular distribution of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately 5 fb$^{-1}$. [...]
arXiv:1808.00264 ; CERN-EP-2018-197 ; LHCb-PAPER-2018-029 ; LHCB-PAPER-2018-029. - 2018. - 27 p.
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2018-07-30
16:01
Measurement of the relative $B^{-} \rightarrow D^{0} / D^{*0} / D^{**0} \mu^{-} \overline{\nu}_\mu$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{*0}$ decays / LHCb Collaboration
The decay of the narrow resonance $\overline{B}{}_{s2}^{*0}\!\rightarrow B^- K^+$ can be used to determine the $B^-$ momentum in partially reconstructed decays without any assumptions on the decay products of the $B^-$ meson. [...]
arXiv:1807.10722 ; LHCb-PAPER-2018-024 ; CERN-EP-2018-190 ; LHCB-PAPER-2018-024. - 2018. - 27 p.
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2018-07-18
10:00
Search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays / LHCb Collaboration
A search for $C\!P$ violation in $\Lambda^0_b \to p K^-$ and $\Lambda^0_b \to p \pi^-$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. [...]
arXiv:1807.06544 ; LHCb-PAPER-2018-025 ; CERN-EP-2018-189 ; LHCB-PAPER-2018-025. - 2018. - 18 p.
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2018-07-06
10:57
First observation of the doubly charmed baryon decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}$ / LHCb Collaboration
The doubly charmed baryon decay $\Xi_{cc}^{++} \rightarrow \Xi_{c}^{+} \pi^{+}$ is observed for the first time, with a statistical significance of $5.9\sigma$, confirming a recent observation of the baryon in the $\Lambda_c^{+} K^{-} \pi^{+} \pi^{+}$ final state [...]
LHCb-PAPER-2018-026 ; CERN-EP-2018-172 ; LHCB-PAPER-2018-026 ; arXiv:1807.01919 ; LHCB-PAPER-2018-026. - 2018. - 17 p.
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2018-06-26
11:08
Search for beautiful tetraquarks in the $\Upsilon(1S)\mu^+\mu^-$ invariant-mass spectrum / LHCb Collaboration
The $\Upsilon(1S)\mu^+\mu^-$ invariant-mass distribution is investigated for a possible exotic meson state composed of two $b$ quarks and two $\overline{b}$ quarks, $X_{b\overline{b}b\overline{b}}$. [...]
LHCb-PAPER-2018-027 ; CERN-EP-2018-163 ; arXiv:1806.09707 ; LHCB-PAPER-2018-027 ; LHCB-PAPER-2018-027. - 2018. - 21 p.
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2018-06-13
16:55
Measurement of $Z\rightarrow\tau^+\tau^-$ production in proton-proton collisions at $\sqrt{s} = 8$ TeV / LHCb Collaboration
A measurement of the $Z\rightarrow\tau^+\tau^-$ production cross-section is presented using data, corresponding to an integrated luminosity of 2 fb$^{-1}$, from $pp$ collisions at $\sqrt{s}=8$ TeV collected by the LHCb experiment. [...]
CERN-EP-2018-147 ; LHCB-PAPER-2018-016 ; arXiv:1806.05008 ; LHCB-PAPER-2018-016. - 2018. - 19 p.
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2018-06-11
15:02
Central exclusive production of $J/\psi$ and $\psi(2S)$ mesons in $pp$ collisions at $\sqrt{s}=13~$TeV / LHCb Collaboration
Measurements are reported of the central exclusive production of $J/\psi$ and $\psi(2S)$ mesons in $pp$ collisions at a centre-of-mass energy of 13$\ \rm {TeV}$. [...]
LHCB-PAPER-2018-011 ; CERN-EP-2018-152 ; arXiv:1806.04079 ; LHCB-PAPER-2018-011. - 2018. - 27 p.
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2018-06-07
09:21
Search for a dimuon resonance in the $\Upsilon$ mass region / LHCb Collaboration
A search is performed for a spin-0 boson, $\phi$, produced in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, using prompt $\phi\rightarrow\mu^+\mu^-$ decays and a data sample corresponding to an integrated luminosity of approximately $3.0~{\rm fb}^{-1}$ collected with the LHCb detector. [...]
LHCb-PAPER-2018-008 ; CERN-EP-2018-111 ; LHCB-PAPER-2018-008 ; arXiv:1805.09820 ; LHCB-PAPER-2018-008. - 2018. - 22 p.
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