# EP Articles

Nyeste elementer:
2020-09-08
17:27
 Search for the doubly heavy $\mathit{\Xi}_{bc}^{0}$ baryon via decays to $D^0pK^-$ / LHCb Collaboration A search for the doubly heavy $\mathit{\Xi}_{bc}^{0}$ baryon using its decay to the $D^0pK^-$ final state is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of 5.4 $\mathrm{fb}^{-1}$. No significant signal is found in the invariant mass range from 6.7 to 7.2 $\mathrm{GeV}/c^2$. [...] arXiv:2009.02481; CERN-EP-2020-137; LHCB-PAPER-2020-014.- Geneva : CERN, 2020 - 22 p. - Published in : JHEP 2011 (2020) 095 Article from SCOAP3: PDF; Fulltext: 2009.02481 - PDF; CDS-LHCb-PAPER-2020-014-arXiv - PDF; Related data file(s): ZIP;

2020-07-24
16:17
 First branching fraction measurement of the suppressed decay $\Xi_c^0\to \pi^-\Lambda_c^+$ / LHCb Collaboration The $\Xi_c^0$ baryon is unstable and usually decays into charmless final states by the $c \to s u\overline{d}$ transition. It can, however, also disintegrate into a $\pi^-$ meson and a $\Lambda_c^+$ baryon via $s$ quark decay or via $cs\to d c$ weak scattering. [...] arXiv:2007.12096; CERN-EP-2020-129; LHCb-PAPER-2020-016; LHCB-PAPER-2020-016.- Geneva : CERN, 2020-10-13 - 11 p. - Published in : Phys. Rev. D 102 (2020) 071101 Article from SCOAP3: PDF; Fulltext: Xic0-prl-sub - PDF; 2007.12096 - PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP;

2020-07-14
12:16
 Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_\mathrm{NN}}=8.16$ TeV / LHCb Collaboration A study of prompt charm-hadron pair production in proton-lead collisions at $\sqrt{s_\mathrm{NN}}= 8.16$ TeV is performed using data corresponding to an integrated luminosity of about 30 nb${}^{-1}$, collected with the LHCb experiment. Production cross-sections for different pairs of charm hadrons are measured and kinematic correlations between the two charm hadrons are investigated. [...] arXiv:2007.06945; CERN-EP-2020-119; LHCB-PAPER-2020-010.- Geneva : CERN, 2020-11-20 - 13 p. - Published in : Phys. Rev. Lett. 125 (2020) 212001 Article from SCOAP3: PDF; Fulltext: 2007.06945 - PDF; Paper-2020-010 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

2020-07-09
14:01
 First observation of the decay $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ / LHCb Collaboration The first observation of the decay $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ is reported using proton-proton collision data corresponding to an integrated luminosity of 4.7 $\mathrm{fb}^{-1}$ collected by the LHCb experiment in 2011, 2012 and 2016. The measurement is performed in the full kinematically allowed range of the decay outside of the $D^{*-}$ region. [...] arXiv:2007.04280; CERN-EP-2020-112; LHCB-PAPER-2020-015.- 2020-09-23 - 11 p. - Published in : 10.1103/PhysRevD.102.051102 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP;

2020-07-06
14:43
 Searches for low-mass dimuon resonances / LHCb Collaboration Searches are performed for low-mass dimuon resonances, $X$, produced in proton-proton collisions at a center-of-mass energy of 13 TeV, using a data sample corresponding to an integrated luminosity of 5.1 fb$^{-1}$ and collected with the LHCb detector. The $X \to \mu^+\mu^-$ decays can be either prompt-like or displaced from the proton-proton collision, where in both cases the requirements placed on the event and the assumptions made about the production mechanisms are kept as minimal as possible. [...] arXiv:2007.03923; LHCb-PAPER-2020-013; CERN-EP-2020-114; LHCB-PAPER-2020-013.- 2020-10-26 - 27 p. - Published in : JHEP 2010 (2020) 156 Article from SCOAP3: PDF; Fulltext: 2007.03923 - PDF; LHCb-PAPER-2020-013 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

2020-07-01
16:57
 Observation of structure in the $J/\psi$-pair mass spectrum / LHCb Collaboration Using proton-proton collision data at centre-of-mass energies of $\sqrt{s} = 7$, $8$ and $13\mathrm{\,TeV}$ recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of $9\mathrm{\,fb}^{-1}$, the invariant mass spectrum of $J/\psi$ pairs is studied. A narrow structure around $6.9\mathrm{\,GeV/}c^2$ matching the lineshape of a resonance and a broad structure just above twice the $J/\psi$ mass are observed. [...] arXiv:2006.16957; CERN-EP-2020-115; LHCB-PAPER-2020-011.- Geneva : CERN, 2020 - 11 p. - Published in : Sci. Bull. 2020 (2020) 65 Fulltext: LHCb-PAPER-2020-011 - PDF; 2006.16957 - PDF; Related data file(s): ZIP; External link: PRESSRELEASE

2020-06-09
16:19
 Search for $CP$ violation in $\Xi_c^+\rightarrow pK^-\pi^+$ decays using model-independent techniques / LHCb Collaboration A first search for $CP$ violation in the Cabibbo-suppressed $\Xi_c^+\rightarrow pK^-\pi^+$ decay is performed using both a binned and an unbinned model-independent technique in the Dalitz plot. The studies are based on a sample of proton-proton collision data, corresponding to an integrated luminosity of $3.0~\rm fb^{-1}$, and collected by the LHCb experiment at centre-of-mass energies of $7$ and $8~\rm TeV$. [...] arXiv:2006.03145; CERN-EP-2020-069; LHCb-PAPER-2019-026; LHCB-PAPER-2019-026.- Geneva : CERN, 2020-10-26 - 16 p. - Published in : Eur. Phys. J. C 80 (2020) 986 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

2020-05-28
16:30
 Study of the $\psi_2(3823)$ and $\chi_{c1}(3872)$ states in $B^+\to (J/\psi \pi^+\pi^-)K^+$ decays / LHCb Collaboration The decays $B^+\rightarrow J/\psi \pi^+ \pi^- K^+$ are studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$ collected with the LHCb detector in proton-proton collisions between 2011 and 2018. Precise measurements of the ratios of branching fractions with the intermediate $\psi_2(3823)$, $\chi_{c1}(3872)$ and $\psi(2S)$ states are reported. [...] arXiv:2005.13422; CERN-EP-2020-071; LHCB-PAPER-2020-009.- Geneva : CERN, 2020-08-25 - 29 p. - Published in : JHEP 2008 (2020) 123 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-009 - PDF; 2005.13422 - PDF; Related data files: ZIP; Supplementary information: ZIP; External link: Interactions.org article

2020-05-28
16:15
 Study of the lineshape of the $\chi_{c1}(3872)$ state / LHCb Collaboration A study of the lineshape of the $\chi_{c1}(3872)$ state is made using a data sample corresponding to an integrated luminosity of 3fb$^{-1}$ collected in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate $\chi_{c1}(3872)$ mesons from $b$-hadron decays are selected in the $J/\psi \pi^+ \pi^-$ decay mode. [...] arXiv:2005.13419; CERN-EP-2020-086; LHCb-PAPER-2020-008; LHCB-PAPER-2020-008.- Geneva : CERN, 2020-11-13 - 20 p. - Published in : Phys. Rev. D 102 (2020) 092005 Fulltext: LHCb-PAPER-2020-008 - PDF; 2005.13419 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Interactions.org article

2020-04-22
18:37
 Measurement of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the $\Lambda^0_b$ polarisation in $pp$ collisions / LHCb Collaboration This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the transverse production polarisation of $\Lambda^0_b$ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb$^{-1}$, collected with the LHCb experiment. [...] arXiv:2004.10563; CERN-EP-2020-051; LHCB-PAPER-2020-005.- Geneva : CERN, 2020-06-17 - 30 p. - Published in : JHEP 2006 (2020) 110 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;