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EP Preprints

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2021-05-06
15:34
Angular analysis of $B^0 \to D^{*-}D_s^{*+}$ with $D_s^{*+} \to D_s^+ \gamma$ decays / LHCb Collaboration
The first full angular analysis of the $B^0 \to D^{*-} D_s^{*+}$ decay is performed using 6 fb$^{-1}$ of $pp$ collision data collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. [...]
arXiv:2105.02596 ; LHCb-PAPER-2021-006 ; CERN-EP-2021-056 ; LHCB-PAPER-2021-006. - 2021.
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2021-05-05
12:30
Measurement of $CP$ asymmetry in $D^0 \to K^0_S K^0_S$ decays / LHCb Collaboration
A measurement of the $CP$ asymmetry in $D^0 \to K^0_S K^0_S$ decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb$^{-1}$. [...]
arXiv:2105.01565 ; LHCb-PAPER-2020-047 ; CERN-EP-2021-058 ; LHCB-PAPER-2020-047. - 2021.
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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 ; LHCb-PAPER-2021-002 ; CERN-EP-2021-046 ; LHCB-PAPER-2021-002. - 2021. - 20 p.
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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 (B0s) and antiparticle (B0sbar) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, deltams. [...]
arXiv:2104.04421 ; LHCb-PAPER-2021-005 ; CERN-EP-2021-047 ; LHCB-PAPER-2021-005. - 2021. - 20 p.
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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.
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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 ; LHCb-PAPER-2021-001 ; CERN-EP-2021-036 ; LHCB-PAPER-2021-001. - 2021. - 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 ; LHCb-PAPER-2020-048 ; CERN-EP-2021-024F ; 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 ; LHCb-PAPER-2020-046 ; CERN-EP-2021-027 ; 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 ; CERN-EP-2021-037 ; LHCb-PAPER-2021-003 ; LHCB-PAPER-2021-003. - 2021. - 21 p.
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2021-03-09
05:02
Forecasting performance in particle identification with potential TOF detectors at HL-LHC / Maire, Antonin (Institut Pluridisciplinaire Hubert Curien (FR))
The document addresses comparative performances expected for various configurations of Time-Of-Flight detectors, for several CERN experiments (ALICE-1, ALICE-3, ATLAS, CMS). [...]
CERN-OPEN-2021-003 ; CERN-PH-EP-2021-ANA-1073. - 2021. - 103 p.
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