CERN Accelerating science

LHCb Conference Contributions

Darreres entrades:
2015-07-27
16:02
A precise measurement of the $B^0$ meson oscillation frequency / Vecchi, Stefania (Ferrara U.) ; Khanji, Basem (Universita & INFN, Milano-Bicocca (IT)) /LHCb Collaboration
The oscillation frequency of $B^0$ mesons is measured using semileptonic decays with a charged $D$ or $D^*$ meson in the final state, on a data sample collected by the LHCb detector corresponding to an integrated luminosity of 3 fb$^{-1}$ of $pp$ collisions. A combination of the two decay modes gives $\Delta m_d = (503.6 \pm 2.0 \pm 1.3)$ ns$^{-1}$ , where the first uncertainty is statistical and the second systematic [...]
LHCB-CONF-2015-003; CERN-LHCb-CONF-2015-003.- Geneva : CERN, 2015 - 29. Fulltext: PDF; Related data file(s): TAR.GZ;
In : European Physical Society Conference on High Energy Physics 2015, Vienna, Austria, 22 - 29 Jul 2015

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2015-07-23
11:37
First measurements of long-range near-side angular correlations in $\sqrt{s_{NN}}=5 TeV$ proton-lead collisions in the forward region / Meissner, Marco (Ruprecht-Karls-Universitaet Heidelberg (DE)) /LHCb Collaboration
Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{NN}}=5 TeV$, collected with the \lhcb detector at the \lhc. The analysis is based on data recorded in two opposing beam configurations, in which either the direction of the proton or that of the lead remnant is analysed. [...]
LHCb-CONF-2015-004; CERN-LHCb-CONF-2015-004.- Geneva : CERN, 2015 - 17. Fulltext: PDF; Related data file(s): ZIP;
In : European Physical Society Conference on High Energy Physics 2015, Vienna, Austria, 22 - 29 Jul 2015

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2015-03-23
17:22
Angular analysis of the $B^{0} \rightarrow K^{*0} \mu^{+} \mu^{-}$ decay /LHCb Collaboration
An angular analysis of the $B^{0}\rightarrow K^{*0}\mu^{+}\mu^{-}$ decay is presented using $pp$-collision data collected at the LHCb experiment. The dataset corresponds to an integrated luminosity of 3 fb$^{-1}$. [...]
LHCb-CONF-2015-002; CERN-LHCb-CONF-2015-002.- Geneva : CERN, 2015 - 41 p. Fulltext: PDF; Related data file(s): ZIP;
In : 50th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 14 - 21 Mar 2015

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2015-02-12
11:10
Study of the decay $B^+ \rightarrow K^+\pi^0$ at LHCb /LHCb Collaboration
This analysis investigates the capability of LHCb to study the decay mode $B^+ \rightarrow K^+\pi^0$. This serves as a prototype analysis for decay channels with similar topologies, such as the $B^0 \rightarrow K^0\pi^0$, the $\Lambda_b \rightarrow \Lambda^0\gamma$, and the $B^0 \rightarrow K^0\pi^0\gamma$ decays, which involve photons in the final state and lack a reconstructed decay vertex. [...]
LHCb-CONF-2015-001; CERN-LHCb-CONF-2015-001.- Geneva : CERN, 2015 - 11 p. Fulltext: Figures - ZIP; LHCb-CONF-2015-001 - PDF;
In : 50th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 14 - 21 Mar 2015

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2014-09-12
16:31
Improved constraints on $\gamma$: CKM2014 update /LHCb Collaboration
We report on an updated combination of all currently available tree-level measurements of the CKM angle $\gamma$ from LHCb. We use results obtained from time integrated analyses of $B^+ \to Dh^+$ and $B^0 \to DK^{*0}$ decays, where $h^+$ corresponds to either $K^+$ or $\pi^+$ and the D meson decays into $K^+ K^-, \pi^+ \pi^-, K^{\pm}\pi^{\mp}, K_s^0K^{\pm}\pi^{\mp}, K_s^0\pi^{\pm}\pi^{\mp}, K_s^0K^{\pm}K^{\mp}$, and $K^{\pm}\pi^{\mp}\pi^{\pm}\pi^{\mp}$. [...]
LHCB-CONF-2014-004; CERN-LHCb-CONF-2014-004.- Geneva : CERN, 2014 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version
In : 8th International Workshop on the CKM Unitarity Triangle, Univ. Tech., Vienna, Austria, 08 - 12 Sep 2014

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2014-08-08
16:08
Reference pp cross-sections for $\Upsilon(1S)$ studies in proton-lead collisions at $\sqrt{s_{NN}} = 5.02$ TeV and comparisons between ALICE and LHCb results /LHCb Collaboration ; ALICE Collaboration
The ALICE and LHCb collaborations have studied $\Upsilon$ (1$S$) production at large rapidities in proton-lead collisions at $\sqrt{s_{NN}} = 5.02$ TeV at the LHC using di-muon fi nal states. The evaluation of cold nuclear matter effects requires the knowledge of the corresponding $\Upsilon$ (1$S$) production cross section in $pp$ collisions at the same centre-of-mass energy and in the same kinematic range. [...]
LHCb-CONF-2014-003; CERN-LHCb-CONF-2014-003; ALICE-PUBLIC-2014-002.- Geneva : CERN, 2014 - 20 p. Fulltext: PDF;

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2014-07-31
17:12
Measurement of the forward $W$ boson cross-section in $pp$ collisions at $\sqrt{s} = 7\mathrm{\,Te\kern -0.1em V}$ /LHCb Collaboration
A measurement of the inclusive $W \to \mu\nu$ production cross-section using data from $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 7\mathrm{\,Te\kern -0.1em V}$ is presented. The analysis is based on an integrated luminosity of about 1.0 fb$^{-1}$ recorded with the LHCb detector. [...]
LHCb-CONF-2014-002; CERN-LHCb-CONF-2014-002.- Geneva : CERN, 2014 - 27 p. Fulltext: PDF; Related data file(s): ZIP;
In : 37th International Conference on High Energy Physics, Valencia, Spain, 2 - 9 Jul 2014

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2014-07-31
16:28
Search for pair production of long-lived heavy charged stau particles with LHCb /LHCb Collaboration
The minimal Gauge Mediated Supersymmetry Breaking (mGMSB) model predicts that the next-to-lightest Supersymmetric Particle is the $stau$, the charged, massive, and long-lived bosonic super-partner to the tau. We have analysed data collected at the LHCb experiment in 2011 and 2012 corresponding to a total of about 3 fb$^{−1}$, searching for pairs of particles which can be identified as staus with masses between 124 and 309 GeV/c$^2$. [...]
LHCb-CONF-2014-001; CERN-LHCb-CONF-2014-001.- Geneva : CERN, 2014 - 15 p. Fulltext: LHCb-CONF-2014-001 - PDF; cds - ZIP;
In : 10th Rencontres du Vietnam - Flavour Physics Conference, Quy Nhon, Vietnam, 27 Jul - 2 Aug 2014

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2013-12-22
21:13
Reference $pp$ cross-sections for $J/\psi$ studies in proton-lead collisions at $\sqrt{s_{NN}} = 5.02$~TeV and comparisons between ALICE and LHCb results /ALICE Collaboration ; LHCb Collaboration
The ALICE and LHCb collaborations have studied $J/\psi$ production at forward rapidities in proton-lead collisions at $\sqrt{s}=5.02$~TeV using the dimuon channel. The evaluation of cold nuclear matter effects requires the knowledge of the corresponding $J/\psi$ cross-section in $pp$ collisions at the same centre-of-mass energy and in the same kinematic range. [...]
LHCb-CONF-2013-013; CERN-LHCb-CONF-2013-013; ALICE-PUBLIC-2013-002.- Geneva : CERN, 2013 Figures: ZIP; Fulltext: PDF;

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2013-07-25
00:31
Combination of results on the rare decays $B^0_{(s)} \to \mu^+\mu^-$ from the CMS and LHCb experiments /CMS and LHCb Collaborations
A combination of results on the rare decays $B^0_s \to \mu^+\mu^-$ and $B^0 \to \mu^+\mu^-$ from the CMS and LHCb experiments is performed. After accounting for known correlations, the average time-integrated branching fraction of the decay $B^0_s \to \mu^+\mu^-$ is determined to be ${\cal B}(B^0_{s} \to \mu^+\mu^-) = (2.9 \pm 0.7) \times 10^{-9}$ where the uncertainties include both statistical and systematic sources..
CMS-PAS-BPH-13-007; LHCb-CONF-2013-012; CERN-LHCb-CONF-2013-012.- Geneva : CERN, 2013 - 6 p. Fulltext: Figure_001-b-thumb - PDF PNG; manifest - XML; Figure_002-a - PDF PNG; Figure_002-b - PDF PNG; Figure_001-a - PDF PNG; LHCb-CONF-2013-012_Figures - ZIP; Fulltext (CMS): PDF; Fulltext (LHCb): PDF;
In : EPS-HEP 2013 European Physical Society Conference on High Energy Physics, Stockholm, Sweden, 18 - 24 Jul 2013

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