2022-01-07
13:56 |
Observation of the $B^0\rightarrow\overline{D}^{*0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*0}K^{-}\pi^{+}$ decays
/ LHCb Collaboration
The first observations of $B^0\rightarrow\overline{D}^{*}(2007)^{0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*}(2007)^{0}K^{-}\pi^{+}$ decays are presented, and their branching fractions relative to that of the $B^0\rightarrow\overline{D}^{*}(2007)^{0}\pi^{+}\pi^{-}$ decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the angle $\gamma$ of the CKM unitarity triangle. [...]
arXiv:2112.11428; CERN-EP-2021-262; LHCB-PAPER-2021-043.-
Geneva : CERN, 2022-04-01 - 22 p.
- Published in : Phys. Rev. D 105 (2022) 072005
Fulltext: LHCb-PAPER-2021-043 - PDF; 2112.11428 - PDF; Publication - PDF; Related data file(s): ZIP;
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2021-12-06
12:17 |
Observation of $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ decays
/ LHCb Collaboration
The multihadron decays $\Lambda_b^0\rightarrow D^+ p \pi^-\pi^-$ and $\Lambda_b^0\rightarrow D^{*+} p \pi^-\pi^-$ are observed in data corresponding to an integrated luminosity of 3fb$^{-1}$, collected in proton-proton collisions at centre-of-mass energies of 7 and 8TeV by the LHCb detector. Using the decay $\Lambda_b^0\rightarrow \Lambda_c^+ \pi^+ \pi^-\pi^-$ as a normalisation channel, the ratio of branching fractions is measured to be
arXiv:2112.02013; LHCb-PAPER-2021-040; CERN-EP-2021-237; LHCB-PAPER-2021-040.-
Geneva : CERN, 2022-03-23 - 30 p.
- Published in : JHEP 2203 (2022) 153
Fulltext: LHCb-PAPER-2021-040 - PDF; document - PDF; 2112.02013 - PDF; Related data file(s): ZIP;
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2021-11-23
12:08 |
Measurement of the photon polarization in $\Lambda_{b}^{0}$ $\to$ $\Lambda$ $\gamma$ decays
/ LHCb Collaboration
The photon polarization in $b\to s\gamma$ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of $\Lambda_{b}^{0}\to\Lambda\gamma$ decays. A data sample corresponding to an integrated luminosity of $6\;\mathrm{fb^{-1}}$ collected by the LHCb experiment in $pp$ collisions at a center-of-mass energy of $13\;\mathrm{TeV}$ is used. [...]
arXiv:2111.10194; LHCb-PAPER-2021-030; CERN-EP-2021-230.-
2022-03-01 - 11 p.
- Published in : Phys. Rev. D 105 (2022) L051104
Fulltext: 2111.10194 - PDF; Lb2L0Gamma_Angular_Paper - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2021-11-23
11:49 |
Searches for rare $ {B}_s^0 $ and B$^{0}$ decays into four muons
/ LHCb Collaboration
Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$. Direct decays and decays via light scalar and $J/\psi$ resonances are considered. [...]
arXiv:2111.11339; LHCb-PAPER-2021-039; CERN-EP-2021-236.-
2022-03-17 - 27 p.
- Published in : JHEP 2203 (2022) 109
Fulltext: 2111.11339 - PDF; document - PDF; LHCb-PAPER-2021-039 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP;
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2021-11-08
11:29 |
Study of $ {\mathrm{B}}_{\mathrm{c}}^{+} $ decays to charmonia and three light hadrons
/ LHCb Collaboration
Using proton-proton collision data, corresponding to an integrated luminosity of $9fb^{-1}$ collected with the LHCb detector, seven decay modes of the $B_c^+$ meson into a $J/\psi$ or $\psi(2S)$ meson and three charged hadrons, kaons or pions, are studied. The decays $B_c^+\rightarrow ( \psi(2S) \rightarrow J/\psi \pi^+ \pi^-)\pi^+ $, $B_c^+\rightarrow \psi(2S)\pi^+\pi^+\pi^-$, $B_c^+\rightarrow J/\psi K^+\pi^+\pi^-$ and $B_c^+\rightarrow J/\psi K^+K^+K^-$ are observed for the first time, and evidence for the $B_c^+\rightarrow \psi(2S)K^+K^-\pi^+$ decay is found, where $J/\psi$ and $\psi(2S)$ mesons are reconstructed in their dimuon decay modes. [...]
arXiv:2111.03001; LHCb-PAPER-2021-034; CERN-EP-2021-216; LHCB-PAPER-2021-034.-
Geneva : CERN, 2022-01-13 - 29 p.
- Published in : JHEP 2201 (2022) 065
Fulltext: LHCb-PAPER-2021-034 - PDF; 2111.03001 - PDF; document - PDF; Related data file(s): ZIP;
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2021-10-18
13:10 |
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2021-10-12
11:22 |
Observation of Two New Excited $\Xi_b^0$ States Decaying to $\Lambda^0_b K^- \pi^+$
/ 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 $6~{\rm fb}^{-1}$. The minimal quark content of the ${\it\Lambda}_b^0 K^-\pi^+$ system indicates that these are excited ${\it\Xi}_b^0$ baryons. [...]
arXiv:2110.04497; LHCb-PAPER-2021-025; CERN-EP-2021-188; LHCB-PAPER-2021-025.-
Geneva : CERN, 2022-04-21 - 20 p.
- Published in : Phys. Rev. Lett. 128 (2022) 162001
Fulltext: LHCb-PAPER-2021-025 - PDF; 2110.04497 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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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. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN's Large Hadron Collider, are combined for the first time. [...]
arXiv:2110.02350; LHCb-PAPER-2021-033; CERN-EP-2021-183; LHCB-PAPER-2021-033.-
Geneva : CERN, 2021-12-21 - 32 p.
- Published in : JHEP 2112 (2021) 141
Fulltext: document - PDF; 2110.02350 - PDF; LHCb-PAPER-2021-033_v8 - PDF; Related data file(s): ZIP;
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2021-09-17
13:44 |
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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. The data sample used corresponds to an integrated luminosity of 6 fb$^{-1}$ collected at a center-of-mass energy of $13$ TeV with the LHCb detector. [...]
arXiv:2109.08084; LHCb-PAPER-2021-029; CERN-EP-2021-176; LHCB-PAPER-2021-029.-
Geneva : CERN, 2022-02-24 - 24 p.
- Published in : Phys. Rev. Lett. 128 (2022) 082001
Fulltext: 2109.08084 - PDF; LHCb-PAPER-2021-029 - PDF; PhysRevLett.128.082001 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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