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LHCb Papers

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2016-06-28
15:21
Amplitude analysis of $B^+\to J/\psi \phi K^+$ decays
The first full amplitude analysis of $B^+\to J/\psi \phi K^+$ with $J/\psi\to\mu^+\mu^-$, $\phi\to K^+K^-$ decays is performed with a data sample of 3 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=7$ and $8$ TeV with the LHCb detector. [...]
CERN-EP-2016-156 ; LHCB-PAPER-2016-019.
- 2016.
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2016-06-28
15:17
Observation of $J/\psi\phi$ structures consistent with exotic states from amplitude analysis of $B^+\to J/\psi \phi K^+$ decays
The first full amplitude analysis of $B^+\to J/\psi \phi K^+$ with $J/\psi\to\mu^+\mu^-$, $\phi\to K^+K^-$ decays is performed with a data sample of 3 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=7$ and $8$ TeV with the LHCb detector. [...]
CERN-EP-2016-155 ; LHCB-PAPER-2016-018.
- 2016.
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2016-06-23
08:48
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$^{-1}$. [...]
arXiv:1606.06999 ; LHCB-PAPER-2016-015 ; CERN-EP-2016-151.
- 2016. - 33 p.
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2016-06-16
08:31
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 $B^{0}\rightarrow K^{+}\pi^{-}\mu^{+}\mu^{-}$. [...]
arXiv:1606.04731 ; CERN-EP-2016-141 ; LHCB-PAPER-2016-012.
- 2016.
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2016-06-01
10:16
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. [...]
arXiv:1605.09768 ; LHCB-PAPER-2016-013 ; CERN-EP-2016-133.
- 2016. - 17 p.
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2016-05-06
08:25
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. [...]
arXiv:1605.01082 ; LHCB-PAPER-2016-007 ; CERN-EP-2016-089.
- 2016. - 32 p.
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2016-05-04
08:04
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.- Geneva : CERN, 2016 - 27 p. - Published in : J. High Energy Phys. 05 (2016) 131 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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2016-04-21
08:37
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. [...]
arXiv:1604.05708 ; LHCB-PAPER-2016-009 ; CERN-EP-2016-086.
- 2016. - 21 p.
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2016-04-14
09:52
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.- Geneva : CERN, 2016 - 18 p. - Published in : J. High Energy Phys. 05 (2016) 161 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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2016-04-13
08:26
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$\mbox{fb}^{-1}$. [...]
arXiv:1604.03475 ; LHCB-PAPER-2015-031 ; CERN-EP-2016-084.
- 2016. - 27 p.
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