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LHCb Papers

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2014-07-23
16:28
Evidence of $CP$ violation in $B^+\to p\bar{p}K^+$ decays
Three-body $B^+\to p \overline p K^+$ and $B^+\to p \overline p \pi^+$ decays are studied using a data sample corresponding to an integrated luminosity of 3.0 $fb^{-1}$ collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of $7$ and $8$ TeV. [...]
CERN-PH-EP-2014-173 ; LHCB-PAPER-2014-034.
- 2014.
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2014-07-10
05:12
Measurement of CP violation in $B_s^0 \to \phi \phi$ decays / LHCb collaboration
A measurement of the decay time dependent $CP$-violating asymmetry in $B_s^0 \to \phi\phi$ decays is presented, along with measurements of the $T$-odd triple-product asymmetries. [...]
arXiv:1407.2222 ; CERN-PH-EP-2014-150 ; LHCB-PAPER-2014-026.
- 2014. - 28 p.
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2014-06-30
04:06
Effective lifetime measurements in the $B_{s}^{0} \rightarrow K^{+}K^{-}$, $B^{0} \rightarrow K^{+}\pi^{-}$ and $B_{s}^{0} \rightarrow \pi^{+}K^{-}$ decays / LHCb collaboration
Measurements of the effective lifetimes in the $B_{s}^{0} \rightarrow K^{+}K^{-}$, $B^{0} \rightarrow K^{+}\pi^{-}$ and $B_{s}^{0} \rightarrow \pi^{+}K^{-}$ decays are presented using $1.0~\mathrm{fb^{-1}}$ of $pp$ collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. [...]
arXiv:1406.7204 ; CERN-PH-EP-2014-127 ; LHCB-PAPER-2014-011.
- 2014. - 12 p.
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2014-06-26
12:42
Test of lepton universality using $B^{+}\rightarrow K^{+}\ell^{+}\ell^{-}$ decays / LHCb Collaboration
A measurement of the ratio of the branching fractions of the $B^{+}\rightarrow K^{+}\mu^{+}\mu^{-}$ and $B^{+}\rightarrow K^{+}e^{+}e^{-}$ decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 $\mathrm{\,Te\kern -0.1em V}$. [...]
arXiv:1406.6482 ; CERN-PH-EP-2014-140 ; LHCB-PAPER-2014-024.
- 2014. - 10 p.
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2014-06-19
09:41
First measurement of the charge asymmetry in beauty-quark pair production / LHCb collaboration
The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b\bar{b}$ pair production at a hadron collider. [...]
arXiv:1406.4789 ; CERN-PH-EP-2014-130 ; LHCB-PAPER-2014-023.
- 2014. - 16 p.
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2014-06-12
04:51
Observation of $Z$ production in proton-lead collisions at LHCb / LHCb collaboration
The first observation of $Z$ boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of $\sqrt{s_{NN}}=5~\text{TeV}$ is presented. [...]
arXiv:1406.2885 ; CERN-PH-EP-2014-126 ; LHCB-PAPER-2014-022.
- 2014. - 19 p.
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2014-06-05
20:23
Observation of the $\Lambda_b^0 \rightarrow J/\psi p \pi^-$ decay / LHCb collaboration
The first observation of the Cabibbo-suppressed decay $\Lambda_b^0\rightarrow J/\psi p \pi^-$ is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 $\rm fb^{-1}$. [...]
arXiv:1406.0755 ; LHCB-PAPER-2014-020 ; CERN-PH-EP-2014-115.
- 2014. - 20 p.
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2014-05-30
05:59
Precision measurement of the mass and lifetime of the $\Xi_b^0$ baryon / LHCb collaboration
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 $\Xi_b^0\to\Xi_c^+\pi^-$, $\Xi_c^+\to pK^-\pi^+$ signal decays are reconstructed. From this sample, the first measurement of the $\Xi_b^0$ baryon lifetime is made, relative to that of the $\Lambda_b^0$ baryon. [...]
arXiv:1405.7223; LHCB-PAPER-2014-021; CERN-PH-EP-2014-107.- Geneva : CERN, 2014 - 7 p. - Published in : Phys. Rev. Lett. 113 (2014) 032001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP.ZIP; External link: Preprint

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2014-05-30
05:59
Study of the kinematic dependences of $\Lambda_b^0$ production in $pp$ collisions and a measurement of the $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ branching fraction / LHCb collaboration
The kinematic dependences of the relative production rates, $f_{\Lambda_b^0}/f_d$, of $\Lambda_b^0$ baryons and $\bar{B}^0$ mesons are measured using $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ and $\bar{B}^0 \rightarrow D^+ \pi^-$ decays. [...]
arXiv:1405.6842 ; CERN-PH-EP-2014-106 ; LHCB-PAPER-2014-004.
- 2014. - 22 p.
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2014-05-21
04:56
Study of $\Upsilon$ production and cold nuclear matter effects in pPb collisions at $\sqrt{s_{NN}}=5~\mathrm{TeV}$ / LHCb collaboration
Production of $\Upsilon$ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy $\sqrt{s_{NN}}=5 \mathrm{TeV}$ is studied with the LHCb detector. [...]
arXiv:1405.5152 ; LHCB-PAPER-2014-015 ; CERN-PH-EP-2014-102.
- 2014. - 20 p.
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