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LHCb Papers

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2015-09-04
15:37
First measurement of the differential branching fraction and $C\!P$ asymmetry of the $B^\pm\to\pi^\pm\mu^+\mu^-$ decay
The differential branching fraction with respect to the dimuon invariant mass squared, and the $C\!P$ asymmetry of the $B^\pm\to\pi^\pm\mu^+\mu^-$ decay are measured for the first time. [...]
CERN-PH-EP-2015-219 ; LHCB-PAPER-2015-035.
- 2015.
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2015-09-04
14:59
Measurement of ${C\!P}$ violation parameters and polarisation fractions in ${B_s^0\to J/\psi \overline{K}^{*0}}$ decays
The first measurement of ${C\!P}$ asymmetries in the decay ${B_s^0\to J/\psi \overline{K}^{*}(892)^{0}}$ and an updated measurement of its branching fraction and polarisation fractions are presented. [...]
CERN-PH-EP-2015-224 ; LHCB-PAPER-2015-034.
- 2015.
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2015-09-04
11:48
Measurement of forward $J/\psi$ production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV
The production of $J/\psi$ mesons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV is studied with the LHCb detector. [...]
CERN-PH-EP-2015-222 ; LHCB-PAPER-2015-037.
- 2015.
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2015-09-02
17:29
Study of the production of $\Lambda_b^0$ and $\overline{B}^0$ hadrons in $pp$ collisions and first measurement of the $\Lambda_b^0\rightarrow J/\psi pK^-$ branching fraction
The product of the $\Lambda_b^0$ ($\overline{B}^0$) differential production cross-section and the branching fraction of the decay $\Lambda_b^0\rightarrow J/\psi pK^-$ ($\overline{B}^0\rightarrow J/\psi\overline{K}^*(892)^0$) is measured as a function of the beauty hadron transverse momentum, $p_{\rm T}$, and rapidity, $y$. [...]
CERN-PH-EP-2015-223 ; LHCB-PAPER-2015-032.
- 2015.
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2015-08-27
07:54
Measurement of the time-integrated $CP$ asymmetry in $D^0 \to K^0_S K^0_S$ decays / LHCb collaboration
The time-integrated $CP$ asymmetry in the decay $D^0 \to K^0_S K^0_S$ is measured using $3 fb^{-1}$ of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. [...]
arXiv:1508.06087 ; CERN-PH-EP-2015-215 ; LHCB-PAPER-2015-030.
- 2015. - 16 p.
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2015-08-18
07:49
Search for hidden-sector bosons in $B^0 \!\to K^{*0}\mu^+\mu^-$ decays / LHCb collaboration
A search is presented for hidden-sector bosons, $\chi$, produced in the decay ${B^0\!\to K^*(892)^0\chi}$, with $K^*(892)^0\!\to K^{+}\pi^{-}$ and $\chi\!\to\mu^+\mu^-$. [...]
arXiv:1508.04094 ; CERN-PH-EP-2015-202 ; LHCB-PAPER-2015-036.
- 2015. - 21 p.
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2015-08-05
08:25
Measurement of the $B_s^0 \to \phi \phi$ branching fraction and search for the decay $B^0 \to \phi \phi$ / LHCb collaboration
Using a dataset corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV, the $B_s^0 \to \phi \phi$ branching fraction is measured to be \[ \mathcal{B}(B_s^0 \to \phi \phi) = ( 1.84 \pm 0.05 (\text{stat}) \pm 0.07 (\text{syst}) \pm 0.11 (f_s/f_d) \pm 0.12 (\text{norm}) ) \times 10^{-5}, \] where $f_s/f_d$ represents the ratio of the $B_s^0$ to $B^0$ production cross-sections, and the $B^0 \to \phi K^*(892)^0$ decay mode is used for normalization. [...]
arXiv:1508.00788 ; LHCB-PAPER-2015-028 ; CERN-PH-EP-2015-198.
- 2015. - 20 p.
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2015-07-30
07:53
$B$ flavour tagging using charm decays at the LHCb experiment / LHCb collaboration
An algorithm is described for tagging the flavour content at production of neutral $B$ mesons in the LHCb experiment. [...]
arXiv:1507.07892 ; CERN-PH-EP-2015-193 ; LHCB-PAPER-2015-027.
- 2015. - 19 p.
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2015-07-14
08:36
Measurement of the branching fraction ratio $\mathcal{B}(B_c^+ \rightarrow \psi(2S)\pi^+)/\mathcal{B}(B_c^+ \rightarrow J/\psi \pi^+)$ / LHCb collaboration
Using $pp$ collision data collected by LHCb at center-of-mass energies $\sqrt{s}$ = 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$, the ratio of the branching fraction of the $B_c^+ \rightarrow \psi(2S)\pi^+$ decay relative to that of the $B_c^+ \rightarrow J/\psi\pi^+$ decay is measured to be 0.268 $\pm$ 0.032 (stat) $\pm$ 0.007 (syst) $\pm$ 0.006 (BF). [...]
arXiv:1507.03516 ; CERN-PH-EP-2015-167 ; LHCB-PAPER-2015-024.
- 2015. - 17 p.
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2015-07-14
08:36
Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda_b^0\to J/\psi K^-p}$ decays / LHCb collaboration
Observations of exotic structures in the $J/\psi p$ channel, that we refer to as pentaquark-charmonium states, in $\Lambda_b^0\to J/\psi K^- p$ decays are presented. The data sample corresponds to an integrated luminosity of 3/fb acquired with the LHCb detector from 7 and 8 TeV pp collisions. [...]
arXiv:1507.03414; CERN-PH-EP-2015-153; LHCB-PAPER-2015-029.- Geneva : CERN, 2015 - 48 p. - Published in : Phys. Rev. Lett. 115 (2015) 072001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file: PDF; Related supplementary data file(s): ZIP; External link: Preprint

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