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1.
Search for Higgs-like bosons decaying into long-lived exotic particles / LHCb collaboration
A search is presented for massive long-lived particles, in the 20-60 GeV mass range with lifetimes between 5 and 100 ps. The dataset used corresponds to 0.62 1\fb of proton-proton collision data collected by the LHCb detector at sqrt(s)=7 TeV. [...]
arXiv:1609.03124; LHCB-PAPER-2016-014; CERN-EP-2016-188; LHCB-PAPER-2016-014; CERN-EP-2016-188.- Geneva : CERN, 2016-12-02 - 29 p. - Published in : Eur. Phys. J. C 76 (2016) 664 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
2.
Evidence for exotic hadron contributions to $\Lambda_b^0 \to J/\psi p \pi^-$ decays / LHCb collaboration
A full amplitude analysis of $\Lambda_b^0 \to J/\psi p \pi^-$ decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV $pp$ collisions, corresponding to an integrated luminosity of 3 fb$^{-1}$. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations $N\to p\pi^-$, either the $P_c(4380)^+$ and $P_c(4450)^+\to J/\psi p$ states, previously observed in $\Lambda_b^0 \to J/\psi p K^-$ decays, or the $Z_c(4200)^-\to J/\psi \pi^-$ state, previously reported in $B^0 \to J/\psi K^+ \pi^-$ decays, or all three, are included in the amplitude models. [...]
arXiv:1606.06999; LHCB-PAPER-2016-015; CERN-EP-2016-151.- Geneva : CERN, 2016-08-18 - 10 p.

APS Open Access Addendum: PhysRevLett.118.119901 - PDF; PhysRevLett.117.109902 - PDF; APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.117.082003 - PDF; arXiv:1606.06999 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
3.
Measurements of the S-wave fraction in $B^{0}\rightarrow K^{+}\pi^{-}\mu^{+}\mu^{-}$ decays and the $B^{0}\rightarrow K^{\ast}(892)^{0}\mu^{+}\mu^{-}$ differential branching fraction / LHCb collaboration
A measurement of the differential branching fraction of the decay ${B^{0}\rightarrow K^{\ast}(892)^{0}\mu^{+}\mu^{-}}$ is presented together with a determination of the S-wave fraction of the $K^+\pi^-$ system in the decay $B^{0}\rightarrow K^{+}\pi^{-}\mu^{+}\mu^{-}$. The analysis is based on $pp$-collision data corresponding to an integrated luminosity of 3\,fb$^{-1}$ collected with the LHCb experiment. [...]
arXiv:1606.04731; CERN-EP-2016-141; LHCB-PAPER-2016-012; CERN-EP-2016-141; LHCB-PAPER-2016-012.- Geneva : CERN, 2016-11-08 - 33 p. Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
4.
Measurement of the $CP$ asymmetry in $B^0_s -\overline B {^0 _s}$ mixing / LHCb Collaboration
The $CP$ asymmetry in the mixing of $B_s^0$ and $\overline{B}{}_s^0$ mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Semileptonic $B_s^0$ and $\overline{B}{}_s^0$ decays are studied in the inclusive mode $D_s^{\mp} \mu^{\pm} {^(}\overline {\nu} {^)} _{\mu} X$ with the $D_s^{\mp}$ mesons reconstructed in the $K^+ K^- \pi^{\mp}$ final state. [...]
arXiv:1605.09768; CERN-EP-2016-133; LHCB-PAPER-2016-013; LHCB-PAPER-2016-013; CERN-EP-2016-133.- Geneva : CERN, 2016-08-05 - 9 p.
APS Open Access article: PDF; Addendum: PDF; Fulltext: arXiv:1605.09768 - PDF; 10.1103_PhysRevLett.117.061803 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
5.
Measurement of the CKM angle $\gamma$ using $B^0 \rightarrow D K^{*0}$ with $D \rightarrow K^0_S \pi^+ \pi^-$ decays / LHCb collaboration
A model-dependent amplitude analysis of the decay $B^0\rightarrow D(K^0_S\pi^+\pi^-) K^{*0}$ is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0fb$^{-1}$, recorded at $\sqrt{s}=7$ and $8 TeV$ by the LHCb experiment. The CP violation observables $x_{\pm}$ and $y_{\pm}$, sensitive to the CKM angle $\gamma$, are measured to be \begin{eqnarray*} x_- &=& -0.15 \pm 0.14 \pm 0.03 \pm 0.01, \\y_- &=& 0.25 \pm 0.15 \pm 0.06 \pm 0.01, \\x_+ &=& 0.05 \pm 0.24 \pm 0.04 \pm 0.01, \\y_+ &=& -0.65^{+0.24}_{-0.23} \pm 0.08 \pm 0.01, \end{eqnarray*} where the first uncertainties are statistical, the second systematic and the third arise from the uncertainty on the $D\rightarrow K^0_S \pi^+\pi^-$ amplitude model. [...]
arXiv:1605.01082; CERN-EP-2016-089; LHCB-PAPER-2016-007; LHCB-PAPER-2016-007; CERN-EP-2016-089.- Geneva : CERN, 2016-08-24 - 32 p. - Published in : JHEP 08 (2016) 137 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
6.
Measurement of forward $W$ and $Z$ boson production in association with jets in proton-proton collisions at $\sqrt{s}=8$ TeV / LHCb collaboration
The production of $W$ and $Z$ bosons in association with jets is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8~TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 fb$^{-1}$. The $W$ boson is identified using its decay to a muon and a neutrino, while the $Z$ boson is identified through its decay to a muon pair. [...]
arXiv:1605.00951; CERN-EP-2016-092; LHCB-PAPER-2016-011; CERN-EP-2016-092; LHCB-PAPER-2016-011.- Geneva : CERN, 2016-05-23 - 27 p. - Published in : JHEP 05 (2016) 131 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
7.
Model-independent evidence for $J/\psi p$ contributions to $\Lambda_b^0\to J/\psi p K^-$ decays / LHCb collaboration
The data sample of $\Lambda_b^0\to J/\psi p K^-$ decays acquired with the LHCb detector from 7 and 8~TeV $pp$ collisions, corresponding to an integrated luminosity of 3 fb$^{-1}$, is inspected for the presence of $J/\psi p$ or $J/\psi K^-$ contributions with minimal assumptions about $K^- p$ contributions. It is demonstrated at more than 9 standard deviations that $\Lambda_b^0\to J/\psi p K^-$ decays cannot be described with $K^- p$ contributions alone, and that $J/\psi p$ contributions play a dominant role in this incompatibility. [...]
arXiv:1604.05708; LHCB-PAPER-2016-009; CERN-EP-2016-086; LHCB-PAPER-2016-009; CERN-EP-2016-086.- Geneva : CERN, 2016-08-18 - 9 p. - Published in : Phys. Rev. Lett. 117 (2016) 082002 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.117.082002 - PDF; arXiv:1604.05708 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
8.
Measurement of the properties of the $\Xi_b^{*0}$ baryon / LHCb Collaboration
We perform a search for near-threshold $\Xi_b^0$ resonances decaying to $\Xi_b^- \pi^+$ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by the LHCb experiment. We observe one resonant state, with the following properties: \begin{eqnarray*} m(\Xi_b^{*0}) - m(\Xi_b^-) - m(\pi^+) &=& 15.727 \pm 0.068 \, (\mathrm{stat}) \pm 0.023 \, (\mathrm{syst}) \, \mathrm{MeV}/c^2, \\ \Gamma(\Xi_b^{*0}) &=& 0.90 \pm 0.16 \, (\mathrm{stat}) \pm 0.08 \, (\mathrm{syst}) \, \mathrm{MeV} [...]
arXiv:1604.03896; LHCB-PAPER-2016-010; CERN-EP-2016-082; LHCB-PAPER-2016-010; CERN-EP-2016-082.- Geneva : CERN, 2016-05-27 - 20 p. - Published in : JHEP 05 (2016) 161 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
9.
A precise measurement of the $B^0$ meson oscillation frequency / LHCb collaboration
The oscillation frequency, $\Delta m_d$, of $B^0$ mesons is measured using semileptonic decays with a $D^-$ or $D^{*-}$ meson in the final state, in a data sample of $pp$ collisions collected by the LHCb detector corresponding to an integrated luminosity of 3.0$\mbox{fb}^{-1}$. A combination of the two decay modes gives $\Delta m_d = (505.0 \pm 2.1 \pm 1.0) \rm \,ns^{-1}$, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1604.03475; LHCB-PAPER-2015-031; CERN-EP-2016-084; LHCB-PAPER-2015-031; CERN-EP-2016-084.- Geneva : CERN, 2016-07-21 - 27 p. - Published in : Eur. Phys. J. C 76 (2016) 412 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
10.
Measurement of the mass and lifetime of the $\Omega_b^-$ baryon / LHCb collaboration
A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at $\sqrt{s}=7$ and 8 TeV, is used to reconstruct $63\pm9$ $\Omega_b^-\to\Omega_c^0\pi^-$, $\Omega_c^0\to pK^-K^-\pi^+$ decays. Using the $\Xi_b^-\to\Xi_c^0\pi^-$, $\Xi_c^0\to pK^-K^-\pi^+$ decay mode for calibration, the lifetime ratio and absolute lifetime of the $\Omega_b^-$ baryon are measured to be \begin{align*} \frac{\tau_{\Omega_b^-}}{\tau_{\Xi_b^-}} &= 1.11\pm0.16\pm0.03, \\ \tau_{\Omega_b^-} &= 1.78\pm0.26\pm0.04\pm0.05~{\rm ps}, \end{align*} where the uncertainties are statistical, systematic and from the calibration mode (for $\tau_{\Omega_b^-}$ only). [...]
arXiv:1604.01412; LHCB-PAPER-2016-008; CERN-EP-2016-081; CERN-EP-2016-081; LHCB-PAPER-2016-008.- Geneva : CERN, 2016-05-19 - 12 p. - Published in : Phys. Rev. D 93 (2016) 092007 Fulltext: arXiv:1604.01412 - PDF; PhysRevD.93 - PDF; 10.1103_PhysRevD.93.092007 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information

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Vea también: autores con nombres similares
227 Frosini, M
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