CERN Accelerating science

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1.
Model-independent confirmation of the $Z(4430)^-$ state / LHCb collaboration
The decay $B^0\to \psi(2S) K^+\pi^-$ is analyzed using $\rm 3~fb^{-1}$ of $pp$ collision data collected with the LHCb detector. A model-independent description of the $\psi(2S) \pi$ mass spectrum is obtained, using as input the $K\pi$ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. [...]
arXiv:1510.01951; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038.- 2015-12-29 - 15 p. - Published in : Phys. Rev. D 92 (2015) 112009 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.92.112009 - PDF; arXiv:1510.01951 - PDF; External link: Figures, tables and other information
2.
Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb / LHCb collaboration
A search is performed for heavy long-lived charged particles using 3.0 fb$^{-1}$ of pp collisions collected at $\sqrt{s}$= 7 and 8 TeV with the LHCb detector. The search is mainly based on the response of the ring imaging Cherenkovdetectors to distinguish the heavy, slow-moving particles from muons. [...]
arXiv:1506.09173; CERN-PH-EP-2105-139; LHCB-PAPER-2015-002; CERN-PH-EP-2105-139; LHCB-PAPER-2015-002.- Geneva : CERN, 2015-12-15 - 24 p. - Published in : Eur. Phys. J. C 75 (2015) 595 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;
3.
Measurement of the exclusive $\Upsilon$ production cross-section in $pp$ collisions at $\sqrt{s}=$7 TeV and 8 TeV / LHCb collaboration
A study is presented of central exclusive production of $\Upsilon(nS)$ states, where the $\Upsilon(nS)$ resonances decay to the $\mu^+\mu^-$ final state, using $pp$ collision data recorded by the LHCb experiment. The cross-section is measured in the rapidity range $2 < y (\Upsilon) < 4.5$ where the muons are reconstructed in the pseudorapidity range $2<\eta(\mu^\pm)<4.5$. [...]
arXiv:1505.08139; LHCB-PAPER-2015-011; CERN-PH-EP-2015-123; LHCB-PAPER-2015-011; CERN-PH-EP-2015-123.- Geneva : CERN, 2015-09-14 - 21 p. - Published in : JHEP 09 (2015) 084 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;
4.
Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV / LHCb collaboration
A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb$^{-1}$ [...]
arXiv:1505.07024; LHCB-PAPER-2015-001; CERN-PH-EP-2015-102; LHCB-PAPER-2015-001; CERN-PH-EP-2015-102.- Geneva : CERN, 2015-08-10 - 41 p. - Published in : JHEP 08 (2015) 039 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
5.
Search for the decay $B^0_s\to\overline{D}^0f_0(980)$ / LHCb Collaboration
A search for $B_s^0 \to \overline{D}^{0} f_{0}(980)$ decays is performed using $3.0\, {\rm fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. The $f_{0}(980)$ meson is reconstructed through its decay to the $\pi^{+}\pi^{-}$ final state in the mass window $900\, {\rm MeV}/c^{2} < m(\pi^{+}\pi^{-}) < 1080\, {\rm MeV}/c^{2}$. [...]
arXiv:1505.01654; LHCB-PAPER-2015-012; CERN-PH-EP-2015-086; LHCB-PAPER-2015-012; CERN-PH-EP-2015-086.- Geneva : CERN, 2015-08-03 - 20 p. - Published in : JHEP 08 (2015) 005 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;
6.
Dalitz plot analysis of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays / LHCb Collaboration
The resonant substructures of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collisions collected by the LHCb detector is used. [...]
arXiv:1505.01710; CERN-PH-EP-2015-110; LHCB-PAPER-2014-070; LHCB-PAPER-2014-070; CERN-PH-EP-2015-110.- Geneva : CERN, 2015-08-07 - 40 p. - Published in : Phys. Rev. D 92 (2015) 032002 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
7.
Quantum numbers of the $X(3872)$ state and orbital angular momentum in its $\rho^0 J/\psi$ decays / LHCb collaboration
Angular correlations in $B^+\to X(3872) K^+$ decays, with $X(3872)\to \rho^0 J/\psi$, $\rho^0\to\pi^+\pi^-$ and $J/\psi \to\mu^+\mu^-$, are used to measure orbital angular momentum contributions and to determine the $J^{PC}$ value of the $X(3872)$ meson. The data correspond to an integrated luminosity of 3.0 fb$^{-1}$ of proton-proton collisions collected with the LHCb detector. [...]
arXiv:1504.06339; LHCB-PAPER-2015-015; CERN-PH-EP-2015-098; LHCB-PAPER-2015-015; CERN-PH-EP-2015-098.- Geneva : CERN, 2015-07-30 - 9 p. - Published in : Phys. Rev. D 92 (2015) 011102 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
8.
A study of $CP$ violation in $B^\mp \rightarrow Dh^\mp$ ($h=K,\pi$) with the modes $D \rightarrow K^\mp \pi^\pm \pi^0$, $D \rightarrow \pi^+\pi^-\pi^0$ and $D \rightarrow K^+K^-\pi^0$ / LHCb collaboration
An analysis of the decays of $B^\mp \rightarrow D K^\mp$ and $B^\mp \rightarrow D \pi^\mp $ is presented in which the $D$ meson is reconstructed in the three-body final states $K^\mp \pi^\pm \pi^0$, $\pi^+ \pi^- \pi^0$ and $K^+ K^- \pi^0$. Using data from LHCb corresponding to an integrated luminosity of 3.0~fb$^{-1}$ of $pp$ collisions, measurements of several $CP$ observables are performed. [...]
arXiv:1504.05442; CERN-PH-EP-2015-097; LHCB-PAPER-2015-014; CERN-PH-EP-2015-097-; CERN-PH-EP-2015-097; LHCB-PAPER-2015-014.- Geneva : CERN, 2015-06-26 - 15 p. - Published in : Phys. Rev. D 91 (2015) 112014 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
9.
Determination of the quark coupling strength $|V_{ub}|$ using baryonic decays / LHCb collaboration
In the Standard Model of particle physics, the strength of the couplings of the $b$ quark to the $u$ and $c$ quarks, $|V_{ub}|$ and $|V_{cb}|$, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the $\Lambda^0_b$ baryon to decay into the $p \mu^- \overline{\nu}_\mu$ final state relative to the $\Lambda^+_c \mu^- \overline{\nu}_\mu$ final state is measured. [...]
arXiv:1504.01568; CERN-PH-EP-2015-084; LHCB-PAPER-2015-013; CERN-PH-EP-2015-084; LHCB-PAPER-2015-013.- Geneva : CERN, 2015-07-27 - 17 p. - Published in : Nature Phys. 11 (2015) 743-747 Fulltext: PDF; Fulltext from Publisher: PDF; Macmillan Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External links: Discovery Magazine article; Nature Research Highlight; Symmetry Magazine article
10.
First observation and measurement of the branching fraction for the decay $B^0_s \to D_s^{*\mp} K^{\pm}$ / LHCb Collaboration
The first observation of the $B^0_s \to D_s^{*\mp} K^{\pm}$ decay is reported using 3.0$fb^{-1}$ of proton-proton collision data collected by the LHCb experiment. The $D_s^{*\mp}$ mesons are reconstructed through the decay chain $D_s^{*\mp} \to \gamma D_s^{\mp}(K^{\mp}K^{\pm}\pi^{\mp})$. [...]
arXiv:1503.09086; LHCB-PAPER-2015-008; CERN-PH-EP-2015-081; LHCB-PAPER-2015-008; CERN-PH-EP-2015-081.- Geneva : CERN, 2015-06-18 - 17 p. - Published in : JHEP 06 (2015) 130 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1503.09086 - PDF; LHCb-PAP-2015-008-hep-ex - PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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