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LHCb Conference Contributions

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2016-03-18
16:00
Search for structure in the $B_s^0\pi^\pm$ invariant mass spectrum /LHCb Collaboration
The claim by the D0 collaboration of the observation of a tetraquark state, dubbed the $X(5568)$, in the $B_s^0\pi^\pm$ invariant mass distribution is investigated. The analysis is based on a data sample recorded with the LHCb detector corresponding to $3 \ {\rm fb}^{-1}$ of $pp$ collision data at $\sqrt{s} = 7$ and $8 \ {\rm TeV}$ [...]
LHCb-CONF-2016-004; CERN-LHCb-CONF-2016-004.- Geneva : CERN, 2016 - 16. Fulltext: LHCb-CONF-2016-004 - PDF; forzipfile - ZIP;
In : 51st Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 19 - 26 Mar 2016

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2016-03-14
16:08
Study of cold nuclear matter effects using prompt $D^0$ meson production in $p\mathrm{Pb}$ collisions at LHCb /LHCb Collaboration
The production of $D^0$ mesons is studied in proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of $0.158\pm0.002 \ \text {nb}^{-1}$ and the nucleon-nucleon centre-of-mass energy of the proton-lead collisions is $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV. [...]
LHCb-CONF-2016-003; CERN-LHCb-CONF-2016-003.- Geneva : CERN, 2016 - 24. Fulltext: figures - ZIP; LHCb-CONF-2016-003 - 4.PDF;
In : 51st Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 19 - 26 Mar 2016

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2016-03-11
15:21
Measurement of the $Z\rightarrow\mu^{+}\mu^{-}$ production cross-section at forward rapidities in pp collisions at $\sqrt{s} = 13$ TeV /LHCb Collaboration
A measurement of the production cross-section for $Z$ bosons in pp collisions at $\sqrt{s} = 13$ TeV is presented using LHCb data, considering events in which the $Z$ boson decays to two muons. The cross-section is measured for muons with pseudorapidities between $2.0 < \eta < 4.5$, transverse momenta $p_\text{T}> 20$ GeV, and where the dimuon invariant mass is in the range $60 < M (\mu\mu) < 120\ \text{GeV}$. [...]
LHCb-CONF-2016-002; CERN-LHCb-CONF-2016-002.- Geneva : CERN, 2016 - 15. Fulltext: suppfigs - ZIP; figs - ZIP; LHCb-CONF-2016-002 - PDF;
In : 30th Les Rencontres de Physique de la Vallée d'Aoste Results and Perspectives in Particle Physics, La Thuile, Aosta Valley, Italie, 6 - 12 Mar 2016

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2016-03-11
14:53
Measurement of the CKM angle $\gamma$ from a combination of $B\to DK$ analyses /LHCb Collaboration
A combination is made of tree-level measurements of the CKM angle $\gamma$ from $B \to DK$ decays at LHCb. The results are obtained from time-integrated analyses of $B^{+}\to D K^+$, $B^0\to D K^{*0}$ and $B^+ \to D K^+\pi^+\pi^-$ decays, where the $D$ meson decays into $K^+K^-$, $\pi^+\pi^-$, $K^+K^-\pi^0$, $K^\pm\pi^\mp\pi^0$, $\pi^+\pi^-\pi^0$, $K^\pm \pi^\mp$, $K^0_S K^\pm\pi^\mp$, $K^0_S\pi^+\pi^-$, $K^0_S K^+K^-$, $K^\pm\pi^\mp \pi^+\pi^-$ and $\pi^+\pi^-\pi^+\pi^-$ final states. [...]
LHCb-CONF-2016-001; CERN-LHCb-CONF-2016-001.- Geneva : CERN, 2016 - 34. Fulltext: LHCb-CONF-2016-001-figures - ZIP; LHCb-CONF-2016-001-supplementary - ZIP; LHCb-CONF-2016-001 - PDF;
In : 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 12 - 19 Mar 2016

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2015-10-23
16:19
Study of $\psi(2S)$ production and cold nuclear matter effects in $pPb$ collisions at $\sqrt{s_{NN}}=5~TeV$ /LHCb Collaboration
The production of $\psi(2S)$ mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of $1.6~nb^{-1}$. [...]
LHCb-CONF-2015-005; CERN-LHCb-CONF-2015-005.- Geneva : CERN, 2015 - 18. Fulltext: PDF; Related data file(s): ZIP;
In : 25th International Conference on Ultra-relativistic Nucleus-nucleus Collisions, Kobe, Jpn, 27 Sep - 4 Oct 2015

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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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