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Measurement of the $B^0_s-\overline{B}^0_s$ oscillation frequency $\Delta m_s$ in $B^0_s \to D^-_s (3)\pi$ decays / LHCb Collaboration
The

$B^0_s$ -

$\overline{B}^0_s$ oscillation frequency

$\Delta m_s$ is measured with 36 pb

$^{-1}$ of data collected in

$pp$ collisions at

$\sqrt{s}$ = 7 TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381

$B^0_s \rightarrow D_s^- \pi^+$ and

$B^0_s \rightarrow D_s^- \pi^+\pi^-\pi^+$ signal decays are reconstructed, with average decay time resolutions of 44~fs and 36~fs, respectively. [...]
arXiv:1112.4311; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 709 (2012) 177-184 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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First observation of the decay $B^0_s \to K^{*0} \overline{K}^{*0}$ / LHCb Collaboration
The first observation of the decay

$B_s^0 \to K*^0 \overline{K}*^0$ is reported using 35 pb

$^{-1}$ of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of

$49.8 \pm 7.5$ signal events are observed, with a significance of 10.9 sigma. [...]
arXiv:1111.4183; CERN-PH-EP-2011-183; LHCB-PAPER-2011-012; CERN-PH-EP-2011-183; LHCB-PAPER-2011-012.- Geneva : CERN, 2013-07-16 - 9 p. - Published in : Phys. Lett. B 709 (2012) 50-58 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Measurement of the effective $B^0_s \rightarrow K^+K^-$ lifetime / LHCb Collaboration
A measurement of the effective

$B_s\rightarrow K^+K^-$ lifetime is presented using approximately

$37 pb^{-1}$ of data collected by LHCb during 2010. This quantity can be used to put constraints on contributions from processes beyond the Standard Model in the

$B_s$ meson system and is determined by two complementary approaches as

$\tau_{B_s\to K^+K^-} = 1.440 \pm 0.096 (stat) \pm 0.008 (syst) \pm 0.003 (model) ps$ ..
arXiv:1111.0521; CERN-PH-EP-2011-167; LHCB-PAPER-2011-014; CERN-PH-EP-2011-167; LHCb-PAPER-2011-014.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 707 (2012) 349-356 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Search for CP violation in $D^{+} \to K^{-}K^{+}\pi^{+}$ decays / LHCb Collaboration
A model-independent search for direct CP violation in the Cabibbo suppressed decay

$D^+ \to K^- K^+\pi^+$ in a sample of approximately 370,000 decays is carried out. The data were collected by the LHCb experiment in 2010 and correspond to an integrated luminosity of 35 pb

$^{-1}$ . [...]
arXiv:1110.3970; LHCB-PAPER-2011-017; CERN-PH-EP-2011-163; LHCB-PAPER-2011-017; CERN-PH-EP-2011-163.- Geneva : CERN, 2011 - 13 p. - Published in : Phys. Rev. D 84 (2011) 112008 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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First observation of the decay $\bar{B}^0_s \to D^0 K^{*0}$ and a measurement of the ratio of branching fractions $\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{*0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)}$ / LHCb Collaboration
The first observation of the decay

$\bar{B}^0_s \to D^0 K^{*0}$ using

$pp$ data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb

$^{-1}$ , is reported. A signal of

$34.4 \pm 6.8$ events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. [...]
arXiv:1110.3676; LHCB-PAPER-2011-008; CERN-PH-EP-2011-150; LHCB-PAPER-2011-008; CERN-PH-EP-2011-150.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 706 (2011) 32-39 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Absolute luminosity measurements with the LHCb detector at the LHC / LHCb Collaboration
Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. [...]
arXiv:1110.2866; LHCB-PAPER-2011-015; CERN-PH-EP-2011-157; LHCB-PAPER-2011-015; CERN-PH-EP-2011-157.- Geneva : CERN, 2012 - 47 p. - Published in : JINST 7 (2012) P01010 Fulltext: PDF; IOP Open Access article: PDF; Related data file(s): ZIP; External link: Preprint

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Search for the lepton number violating decays $B^{+}\rightarrow \pi^- \mu^+ \mu^+$ and $B^{+}\rightarrow K^- \mu^+ \mu^+$ / LHCb Collaboration
A search is performed for the lepton number violating decay

$B^{+}\rightarrow h^- \mu^+ \mu^+$ , where

$h^-$ represents a

$K^-$ or a

$\pi^-$ , using data from the LHCb detector corresponding to an integrated luminosity of

$36pb^{-1}$ . The decay is forbidden in the Standard Model but allowed in models with a Majorana neutrino. [...]
arXiv:1110.0730; CERN-PH-EP-2011-156; LHCB-PAPER-2011-009; LHCB-PAPER-2011-009; CERN-PH-EP-2011-156.- Geneva : CERN, 2012 - 7 p. - Published in : Phys. Rev. Lett. 108 (2012) 101601 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Measurements of the Branching fractions for $B_{(s)} \to D_{(s)}\pi\pi\pi$ and $\Lambda_b^0 \to \Lambda_c^+\pi\pi\pi$ / LHCb Collaboration
Branching fractions of the decays

$H_b\to H_c\pi^-\pi^+\pi^-$ relative to

$H_b\to H_c\pi^-$ are presented, where

$H_b$ (

$H_c$ ) represents

$\overline{B^0}$ (

$D^+$ ),

$B^-$ (

$D^0$ ),

$\overline{B_s^0}$ (

$D_s^+$ ) and

$\Lambda_b^0$ (

$\Lambda_c^+$ ). The measurements are performed with the LHCb detector using 35~

${\rm pb^{-1}}$ of data collected at

$\sqrt{s}=7$ ~TeV. [...]
arXiv:1109.6831; LHCB-PAPER-2011-016; CERN-PH-EP-2011-151; LHCB-PAPER-2011-016; CERN-PH-EP-2011-151.- Geneva : CERN, 2011 - 26 p.
APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Observation of J/ $\psi$ pair production in pp collisions at $\sqrt{s}$ =7 TeV / LHCb Collaboration
The production of

$J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of

$37.5 pb^{-1}$ collected with the LHCb detector. The production cross-section for pairs with both \jpsi in the rapidity range

$2<y^{J/\psi}<4.5$ and transverse momentum

$p_{T}^{J/\psi}<10 GeV/c$ is

$\sigma^{J/\psi J/\psi} = 5.1\pm1.0\pm1.1 nb,$ where the first uncertainty is statistical and the second systematic..
arXiv:1109.0963; LHCB-PAPER-2011-013; CERN-PH-EP-2011-135; LHCB-PAPER-2011-013; CERN-PH-EP-2011-135.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 707 (2012) 52-59 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: DURHAM

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10.

Measurement of the inclusive $\phi$ cross-section in pp collisions at $\sqrt{s}$ = 7 TeV / LHCb Collaboration
The cross-section for inclusive phi meson production in pp collisions at a centre-of-mass energy of sqrt(s) = 7 TeV has been measured with the LHCb detector at the Large Hadron Collider. The differential cross-section is measured as a function of the phi transverse momentum p_T and rapidity y in the region 0.6 < p_T < 5.0 GeV/c and 2.44 < y < 4.06. [...]
arXiv:1107.3935; LHCB-PAPER-2011-007; CERN-PH-EP-2011-106; LHCB-PAPER-2011-007; CERN-PH-EP-2011-106.- Geneva : CERN, 2013-07-16 - 7 p. - Published in : Phys. Lett. B 703 (2011) 267-273 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Rivet analyses reference

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