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LHCb Conference Contributions

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2016-08-22
17:00
Central exclusive production of $J/\psi$ and $\psi(2S)$ mesons in pp collisions at $\sqrt{s}=13$ TeV /LHCb Collaboration
A measurement is made of the central exclusive production of $J/\psi$ and $\psi(2S)$ mesons in $pp$ collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly reduced compared to previous measurements made at lower energies through the use of new forward shower counters [...]
LHCb-CONF-2016-007; CERN-LHCb-CONF-2016-007.- Geneva : CERN, 2016 - 16. Fulltext: lhcb_conf_2016_007 - PDF; LHCb-CONF-2016-007 - ZIP;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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2016-08-22
16:52
Search for $H^0 \rightarrow b \bar{b}$ or $c \bar{c}$ in association with a $W$ or $Z$ boson in the forward region of $pp$ collisions /LHCb Collaboration
The LHCb dataset consisting of proton--proton collisions recorded at $\sqrt{s}=8$ $\mathrm{TeV}$, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 $fb^{-1}$, is used to search for a Higgs boson with a mass of 125 $\mathrm{GeV}$, produced in association with a $W$ or $Z$ boson and decaying to a $b \bar{b}$ or $c \bar{c}$ pair. The final state considered is a pair of heavy flavour tagged jets and one or two high $p_T$ leptons (electrons or muons) [...]
LHCb-CONF-2016-006; CERN-LHCb-CONF-2016-006.- Geneva : CERN, 2016 - 17. Fulltext: PDF; Related data file(s): ZIP;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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2016-07-20
08:53
LHCb dimuon and charm mass distributions /LHCb Collaboration
This note presents a collection of mass distributions for dimuons and charm hadrons collected by the LHCb experiment between 2011 and 2015. 1.2 billion dimuons and 1.4 billion charm hadrons have been collected during this data-taking period
LHCb-CONF-2016-005; CERN-LHCb-CONF-2016-005.- Geneva : CERN, 2016 - 22. Fulltext: LHCb-CONF-2016-005 - PDF; LHCb-CONF-2016-005-fig - ZIP;
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016

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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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