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CERN Document Server Znaleziono 2,050 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 4.99 sekund. 
1.
(100)
Amplitude analysis of the decay $\overline{B}^0 \to K_{S}^0 \pi^+ \pi^-$ and first observation of the CP asymmetry in $\overline{B}^0 \to K^{*}(892)^- \pi^+$ / LHCb Collaboration
The time-integrated Dalitz plot of the three-body hadronic charmless decay ${{\overline{B}}^0 \to K_{\mathrm{\scriptscriptstyle S}}^0 \pi^+ \pi^-}$ is studied using a $pp$ collision data sample recorded with the LHCb detector, corresponding to an integrated luminosity of $3.0\;\mathrm{fb}^{-1}$. The decay amplitude is described with an isobar model. [...]
arXiv:1712.09320; LHCB-PAPER-2017-033; CERN-EP-2017-317.- 2018-06-27 - 10 p. - Published in : Phys. Rev. Lett. 120 (2018) 261801 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; External link: Figures, tables and other information
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2.
(91)
Measurement of $\sigma (pp \to b\overline{b}X)$ at $\sqrt{s}$=7 TeV in the forward region / LHCb Collaboration
Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns..
arXiv:1009.2731; CERN-PH-EP-2010-029; LHCb-PAPER-2010-002; CERN-PH-EP-2010-029; LHCb-PAPER-2010-002.- Geneva : CERN, 2010-11-08 - 8 p. - Published in : Phys. Lett. B 694 (2010) 209-216 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Rivet analyses reference
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3.
(83)
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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4.
(83)
Search for the rare decays $B^0_s \to \mu^+\mu^-$ and $B^0 \to \mu^+\mu^-$ / LHCb Collaboration
A search for the decays $B^0_s \to \mu^+ \mu^-$ and $B^0 \to \mu^+ \mu^-$ is performed with 0.37 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 7~TeV collected by the LHCb experiment in 2011. The upper limits on the branching fractions are ${\cal B} (B^0_s \to \mu^+ \mu^-) < 1.6 \times 10^{-8}$ and ${\cal B}(B^0 \to \mu^+ \mu^-) <3.6 \times 10^{-9}$ at 95% confidence level. [...]
arXiv:1112.1600; CERN-PH-EP-2011-186; LHCB-PAPER-2011-025; CERN-PH-EP-2011-186; LHCB-PAPER-2011-025.- Geneva : CERN, 2013-07-16 - 13 p. - Published in : Phys. Lett. B 708 (2012) 55-67 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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5.
(83)
Measurement of charged particle multiplicities in $pp$ collisions at $\sqrt{s}$ = 7 TeV in the forward region / LHCb Collaboration
The charged particle production in proton-proton collisions is studied with the LHCb detector at a centre-of-mass energy of ${\sqrt{s} =7}$TeV in different intervals of pseudorapidity $\eta$. The charged particles are reconstructed close to the interaction region in the vertex detector, which provides high reconstruction efficiency in the $\eta$ ranges $-2.5<\eta<-2.0$ and $2.0<\eta<4.5$. [...]
arXiv:1112.4592; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209.- Geneva : CERN, 2012-04-20 - 23 p. - Published in : Eur. Phys. J. C 72 (2012) 1947 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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6.
(83)
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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7.
(83)
Opposite-side flavour tagging of $B$ mesons at the LHCb experiment / LHCb Collaboration
The calibration and performance of the opposite-side flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B+ -> J/psi K+, B0 -> J/psi K*0 and B0 -> D*- mu+ nu_mu decay modes with 0.37 fb^-1 of data collected in pp collisions at sqrt(s) = 7 TeV during the 2011 physics run. [...]
arXiv:1202.4979; CERN-PH-EP-2012-039; LHCB-PAPER-2011-027; CERN-PH-EP-2012-039; LHCB-PAPER-2011-027.- Geneva : CERN, 2012-06-07 - 22 p. - Published in : Eur. Phys. J. C 72 (2012) 2022 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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8.
(83)
Measurement of the $B^\pm$ production cross-section in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb Collaboration
The production of B+- mesons in proton-proton collisions at sqrt(s)=7 TeV is studied using 35 pb-1 of data collected by the LHCb detector. The B+- mesons are reconstructed exclusively in the B+- -> J/psi K+- mode, with J/psi -> mu+ mu-. [...]
arXiv:1202.4812; CERN-PH-EP-2012-047; LHCB-PAPER-2011-043; CERN-PH-EP-2012-047; LHCB-PAPER-2011-043.- Geneva : CERN, 2012 - 7 p. - Published in : JHEP 04 (2012) 093 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: DURHAM
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9.
(83)
Measurement of $\Upsilon$ production in $pp$ collisions at $\sqrt{s} = 7$ TeV / LHCb Collaboration
The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s)=7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb-1 collected at the Large Hadron Collider. [...]
arXiv:1202.6579; CERN-PH-EP-2012-051; LHCB-PAPER-2011-036; CERN-PH-EP-2012-051; LHCB-PAPER-2011-036.- Geneva : CERN, 2012-06-07 - 22 p. - Published in : Eur. Phys. J. C 72 (2012) 2025 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: DURHAM
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10.
(82)
Measurement of b hadron production fractions in 7 TeV pp collisions / LHCb Collaboration
Measurements of $b$ hadron production ratios in proton-proton collisions at a centre-of-mass energy of 7 TeV with an integrated luminosity of 3 pb$^{-1}$ are presented. We study the ratios of strange $B$ meson to light $B$ meson production $f_s/(f_u+f_d)$ and $\Lambda_b^0$ baryon to light $B$ meson production $f_{\Lambda_b}/(f_u+f_d)$ as a function of the charmed hadron-muon pair transverse momentum $p_T$ and the $b$ hadron pseudorapidity $\eta$, for $p_T$ between 0 and 14 GeV and $\eta$ between 2 and 5. [...]
arXiv:1111.2357; CERN-PH-EP-2011-172; LHCB-PAPER-2011-018; CERN-PH-EP-2011-172; LHCB-PAPER-2011-018.- Geneva : CERN, 2012 - 28 p. - Published in : Phys. Rev. D 85 (2012) 032008 APS Open Access article: PDF; Extra material: ZIP; Figures: ZIP; Fulltext: PDF; External link: Preprint
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