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EP Preprints

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2021-10-20
11:52
Tests of lepton universality using $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays where $\ell$ is either an electron or a muon are presented. [...]
CERN-EP-2021-208 ; arXiv:2110.09501 ; LHCB-PAPER-2021-038. - 2021.
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2021-10-18
13:10
Search for massive long-lived particles decaying semileptonically at $\sqrt{s}=13$ TeV / LHCb Collaboration
A search is performed for massive long-lived particles (LLP) decaying semileptonically into a muon and two quarks. [...]
arXiv:2110.07293 ; LHCb-PAPER-2021-028 ; CERN-EP-2021-186 ; LHCB-PAPER-2021-028. - 2021.
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2021-10-12
11:22
Observation of two new excited ${\it\Xi}_b^0$ states decaying to ${\it\Lambda}_b^0 K^-\pi^+$ / LHCb Collaboration
Two narrow resonant states are observed in the ${\it\Lambda}_b^0 K^-\pi^+$ mass spectrum using a data sample of proton-proton collisions at a center-of-mass energy of 13$\rm TeV$, collected by the LHCb experiment and corresponding to an integrated luminosity of $6~{\rm fb}^{-1}$. [...]
arXiv:2110.04497 ; LHCb-PAPER-2021-025 ; CERN-EP-2021-188 ; LHCB-PAPER-2021-025. - 2021.
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2021-10-07
13:35
Simultaneous determination of CKM angle $\gamma$ and charm mixing parameters / LHCb Collaboration
A combination of measurements sensitive to the $C\!P$ violation angle $\gamma$ of the Cabibbo--Kobayashi--Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between $D^0$ and $\overline{D}^0$ mesons is performed. [...]
arXiv:2110.02350 ; LHCb-PAPER-2021-033 ; CERN-EP-2021-183 ; LHCB-PAPER-2021-033. - 2021. - 33 p.
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2021-09-17
13:44
Observation of the suppressed $\Lambda^0_b\to D p K^-$ decay with $D\to K^+ \pi^-$ and measurement of its CP asymmetry / LHCb Collaboration
A study of $\Lambda^0_b$ baryon decays to the $DpK^-$ final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9fb$^{-1}$ collected with the LHCb detector. [...]
arXiv:2109.02621 ; LHCb-PAPER-2021-027 ; CERN-EP-2021-179 ; LHCB-PAPER-2021-027. - 2021. - 21 p.
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2021-09-17
09:37
Study of $Z$ bosons produced in association with charm in the forward region / LHCb Collaboration
The fraction of $Z+$jet events that contain a charm jet is measured for the first time in the forward region of proton-proton collisions. [...]
arXiv:2109.08084 ; LHCb-PAPER-2021-029 ; CERN-EP-2021-176 ; LHCB-PAPER-2021-029. - 2021. - 24 p.
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2021-09-16
11:03
Search for the doubly charmed baryon $\it{\Xi}_{cc}^{+}$ in the $\it{\Xi}_{c}^{+} \pi^{-} \pi^{+}$ final state / LHCb Collaboration
A search for the doubly charmed baryon $\it{\Xi}_{cc}^{+}$ is performed in the $\it{\Xi}_{cc}^{+} \rightarrow \it{\Xi}_{c}^{+} \pi^{-} \pi^{+}$ decay mode, where the $\it{\Xi}_{c}^{+}$ baryon is reconstructed in the $p K^{-} \pi^{+}$ final state. [...]
arXiv:2109.07292 ; LHCb-PAPER-2021-019 ; CERN-EP-2021-155 ; LHCB-PAPER-2021-019. - 2021. - 27 p, 27 p.
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2021-09-16
08:46
Measurement of $\chi_{c1}(3872)$ production in proton-proton collisions at $\sqrt{s}=8$ and 13 TeV / LHCb Collaboration
The production cross-section of the $\chi_{c1}(3872)$ state relative to the $\psi(2S)$ meson is measured using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of $\sqrt{s}=8$ and 13 TeV, corresponding to integrated luminosities of 2.0 and 5.4 fb$^{-1}$, respectively. [...]
arXiv:2109.07360 ; LHCb-PAPER-2021-026 ; CERN-EP-2021-182 ; LHCB-PAPER-2021-026. - 2021. - 27 p, 27 p.
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2021-09-03
14:00
Study of the doubly charmed tetraquark $T_{cc}^+$ / LHCb Collaboration
An exotic narrow state in the $D^0D^0\pi^+$ mass spectrum just below the $D^{*+}D^0$ mass threshold is studied using a data set corresponding to an integrated luminosity of 9fb$^{-1}$ acquired with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13TeV. [...]
arXiv:2109.01056 ; CERN-EP-2021-169 ; LHCb-PAPER-2021-032 ; LHCB-PAPER-2021-032. - 2021. - 60 p.
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2021-09-03
13:57
Measurement of the $W$ boson mass / LHCb Collaboration
The $W$ boson mass is measured using proton-proton collision data at $\sqrt{s}=13$ TeV corresponding to an integrated luminosity of 1.7 fb$^{-1}$ recorded during 2016 by the LHCb experiment. [...]
arXiv:2109.01113 ; LHCb-PAPER-2021-024 ; CERN-EP-2021-170 ; LHCB-PAPER-2021-024. - 2021. - 36 p.
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