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First measurement of $Z \to \mu^+\mu^-$ angular coefficients in the forward region of $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The first study of the angular distribution of $\mu^+ \mu^-$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow \gamma^{*}/Z +X \rightarrow l^+ l^- + X$ is presented, using data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.1 $\rm{fb}^{-1}$. The coefficients of the five leading terms in the angular distribution are determined as a function of the dimuon transverse momentum and rapidity. [...]
arXiv:2203.01602; LHCb-PAPER-2021-048; CERN-EP-2022-030; LHCB-PAPER-2021-048.- 2022-08-24 - 11 p. - Published in : Phys. Rev. Lett. 129 (2022) 091801 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version

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Amplitude analysis of the $\Lambda^+_c\to pK^-\pi^+$ decay and $\Lambda^+_c$ baryon polarization measurement in semileptonic beauty hadron decays / LHCb Collaboration
An amplitude analysis of $\Lambda^+_c \to pK^-\pi^+$ decays together with a measurement of the $\Lambda^+_c$ polarization vector in semileptonic beauty hadron decays is presented. A sample of $400\,000$ candidates is selected from proton-proton collisions recorded by the LHCb detector at a center-of-mass energy of 13 TeV. [...]
arXiv:2208.03262; LHCb-PAPER-2022-002; CERN-EP-2022-124.- Geneva : CERN, 2023-07-01 - 27 p. - Published in : Phys. Rev. D 108 (2023) 012023 Fulltext: Publication - PDF; 2208.03262 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Direct $CP$ violation in charmless three-body decays of $B^{\pm}$ mesons / LHCb Collaboration
Measurements of $CP$ asymmetries in charmless three-body decays of $B^\pm$ mesons are reported using proton-proton collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.9$\,$fb$^{-1}$. The previously observed $CP$ asymmetry in $B^\pm \to \pi^\pm K^+ K^-$ decays is confirmed, and $CP$ asymmetries are observed with a significance of more than five standard deviations in the $B^\pm \to \pi^\pm \pi^+ \pi^-$ and $B^\pm \to K^\pm K^+ K^-$ decays, while the $CP$ asymmetry of $B^\pm \to K^\pm \pi^+ \pi^-$ decays is confirmed to be compatible with zero. [...]
arXiv:2206.07622; LHCb-PAPER-2021-049; CERN-EP-2022-100.- Geneva : CERN, 2023-07-01 - 17 p. - Published in : Phys. Rev. D 108 (2023) 012008 Fulltext: 2206.07622 - PDF; LHCb-PAPER-2021-049 - PDF; Publication - PDF; LHCb-PAPER-2021-049-supplementary - ZIP; Related data file(s): ZIP;

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Search for direct $CP$ violation in charged charmless $B \to PV$ decays / LHCb Collaboration
Measurements of $CP$ asymmetry in charmless $B\to PV$ decays are presented, where $P$ and $V$ denote a pseudoscalar and a vector meson, respectively. Five different $B\to PV$ decays from four final states, $B^\pm \to \pi^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm K^+ K^-$ and $B^\pm \to \pi^\pm K^+ K^-$ are analised. [...]
arXiv:2206.02038; LHCb-PAPER-2021-050; CERN-EP-2022-101.- Geneva : CERN, 2023-07-01 - 13 p. - Published in : Phys. Rev. D 108 (2023) 012013 Fulltext: 2206.02038 - PDF; LHCb-PAPER-2021-050 - PDF; Publication - PDF; Related data file(s): ZIP;

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Search for $CP$ violation using $\hat{T}$-odd correlations in $B^{0} \to p \bar p K^{+} \pi^{-}$ decays / LHCb Collaboration
A search for $CP$ and $P$ violation in charmless four-body $B^{0} \to p \bar p K^{+} \pi^{-}$ decays is performed using triple-product asymmetry observables. It is based on proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of $7$, $8$ and $13$ TeV, corresponding to a total integrated luminosity of $8.4$ fb$^{-1}$. [...]
arXiv:2205.08973; LHCb-PAPER-2022-003; CERN-EP-2022-083.- Geneva : CERN, 2023-08-01 - 16 p. - Published in : Phys. Rev. D 108 (2023) 032007 Cover note: ZIP; Fulltext: 2205.08973 - PDF; LHCb-PAPER-2022-003 - PDF; Publication - PDF;

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Evidence for modification of $b$ quark hadronization in high-multiplicity $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The production rate of $B^{0}_{s}$ mesons relative to $B^{0}$ mesons is measured by the LHCb experiment in $pp$ collisions at a center-of-mass energy $\sqrt{s} = 13$ TeV over the forward rapidity interval $2 < y < 4.5$ as a function of the charged particle multiplicity measured in the event. Evidence at the 3.4$\sigma$ level is found for an increase of the ratio of $B^{0}_{s}$ to $B^{0}$ cross-sections with multiplicity at transverse momenta below 6 GeV/$c$, with no significant multiplicity dependence at higher transverse momentum. [...]
arXiv:2204.13042; LHCb-PAPER-2022-001; CERN-EP-2022-062.- Geneva : CERN, 2023-08 - 11 p. - Published in : Phys. Rev. Lett. 131 (2023) 061901 Fulltext: 2204.13042 - PDF; LHCB-PAPER-2022-001 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of CP asymmetries in $ {D}_{(s)}^{+}\to \eta {\pi}^{+} $ and $ {D}_{(s)}^{+}\to {\eta}^{\prime }{\pi}^{+} $ decays / LHCb Collaboration
Searches for $CP$ violation in the decays $D^+_{(s)}\rightarrow \eta \pi^+$ and $D^+_{(s)}\rightarrow \eta^{\prime} \pi^+$ are performed using $pp$ collision data corresponding to 6 fb$^{-1}$ of integrated luminosity collected by the LHCb experiment. The calibration channels $D^+_{(s)}\rightarrow \phi \pi^+$ are used to remove production and detection asymmetries. [...]
arXiv:2204.12228; CERN-EP-2022-035; LHCb-PAPER-2021-051.- 2023-04-18 - 16 p. - Published in : JHEP 04 (2023) 081 Fulltext: 2204.12228 - PDF; document - PDF; Related data file(s): ZIP;

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Observation of sizeable $\omega$ contribution to $\chi_{c1}(3872) \to \pi^+\pi^- J/\psi$ decays / LHCb Collaboration
Resonant structures in the dipion mass spectrum from $\chi_{c1}(3872)\to\pi^+\pi^- J/\psi$ decays, produced via $B^+\to K^+\chi_{c1}(3872)$ decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. A sizeable contribution from the isospin conserving $\chi_{c1}(3872)\to\omega J/\psi$ decay is established for the first time, $(21.4\pm2.3\pm2.0)\%$, with a significance of more than $7.1\sigma$. [...]
arXiv:2204.12597; LHCb-PAPER-2021-045; CERN-EP-2022-049.- Geneva : CERN, 2023-07-01 - 12 p. - Published in : Phys. Rev. D 108 (2023) L011103 Fulltext: 2204.12597 - PDF; Publication - PDF; LHCb-PAPER-2021-045 - PDF; Related data file(s): ZIP;

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Nuclear modification factor of neutral pions in the forward and backward regions in $p$Pb collisions / LHCb Collaboration
The nuclear modification factor of neutral pions is measured in proton-lead collisions collected at a center-of-mass energy per nucleon of $8.16$ TeV with the LHCb detector. The $\pi^0$ production cross section is measured differentially in transverse momentum ($p_{T}$) for $1.5< p_{T} <10.0$ GeV and in center-of-mass pseudorapidity ($\eta_{CM}$) regions $2.5<\eta_{CM}<3.5$ (forward) and $-4.0<\eta_{CM}<-3.0$ (backward) defined relative to the proton beam direction. [...]
arXiv:2204.10608; LHCb-PAPER-2021-053; CERN-EP-2022-050.- Geneva : CERN, 2023-07-24 - 14 p. - Published in : Phys. Rev. Lett. 131 (2023) 042302 Fulltext: Publication - PDF; LHCb-PAPER-2021-053 - PDF; 2204.10608 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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10.

Measurement of the charm mixing parameter $y_{CP} - y_{CP}^{K\pi}$ using two-body $D^0$ meson decays / LHCb Collaboration
A measurement of the ratios of the effective decay widths of $D^0 \to \pi^-\pi^+$ and $D^0 \to K^-K^+$ decays over that of $D^0 \to K^-\pi^+$ decays is performed with the LHCb experiment using proton-proton collisions at a centre-of-mass energy of $13\,\mathrm{TeV}$, corresponding to an integrated luminosity of $6\,\mathrm{fb^{-1}}$. These observables give access to the charm mixing parameters $y_{CP}^{\pi\pi} - y_{CP}^{K\pi}$ and $y_{CP}^{KK} - y_{CP}^{K\pi}$, and are measured as $y_{CP}^{\pi\pi} - y_{CP}^{K\pi} = (6.57 \pm 0.53 \pm 0.16) \times 10^{-3}$, $y_{CP}^{KK} - y_{CP}^{K\pi} = (7.08 \pm 0.30 \pm 0.14) \times 10^{-3}$, where the first uncertainties are statistical and the second systematic. [...]
arXiv:2202.09106; LHCb-PAPER-2021-041; CERN-EP-2022-022; LHCB-PAPER-2021-041.- 2022-05-01 - 27 p. - Published in : Phys. Rev. D 105 (2022) 092013 Fulltext: PhysRevD.105.092013 - PDF; 2202.09106 - PDF; LHCb-PAPER-2021-041 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Vedi anche: autori con nomi simili
1	Bjorn, M.
6	Bjorn, Mikkel
1	Bjørn, M
296	Bjørn, Mikkel

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Bjørn, M. in Amazon Bjørn, M. in CERN EDMS Bjørn, M. in CERN Intranet Bjørn, M. in CiteSeer Bjørn, M. in Google Books Bjørn, M. in Google Scholar Bjørn, M. in Google Web Bjørn, M. in IEC	Bjørn, M. in IHS Bjørn, M. in INSPIRE Bjørn, M. in ISO Bjørn, M. in KISS Books/Journals Bjørn, M. in KISS Preprints Bjørn, M. in NEBIS Bjørn, M. in SLAC Library Catalog Bjørn, M. in Scirus

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