# LHCb Conference Contributions

Ostatnio dodane:
2016-10-14
09:00
 Evidence for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ /LHCb Collaboration A search for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\sqrt{s} = 7$ and $8 TeV$, corresponding to an integrated luminosity of $3 ~ \text {fb}^{-1}$. An excess of events is observed with respect to the background expectations with a signal significance of 4.0 standard deviations [...] LHCb-CONF-2016-013; CERN-LHCb-CONF-2016-013.- Geneva : CERN, 2016 - 13. Fulltext: LHCb-CONF-2016-013-figures - ZIP; LHCb-CONF-2016-013 - PDF; In : 2016 International Conference on Kaon Physics, Birmingham, United Kingdom, 14 - 17 Sep 2016

2016-10-14
08:55
 Updated limit for the decay $K_{\rm\scriptscriptstyle S}^0\rightarrow\mu^+\mu^-$ /LHCb Collaboration A search is performed for the decay $K_{\rm\scriptscriptstyle S}^0\rightarrow\mu^+\mu^-$, using the data sample of $pp$ collisions at $\sqrt{s}=8$ TeV collected by the LHCb experiment at the Large Hadron Collider in 2012, corresponding to an integrated luminosity of 2.0 fb$^{-1}$. In the Standard Model, the decay is expected to be suppressed at a level below the experimental sensitivity, but could be enhanced by new sources of $CP$ violation [...] LHCb-CONF-2016-012; CERN-LHCb-CONF-2016-012.- Geneva : CERN, 2016 - 16. Fulltext: figures - ZIP; LHCb-CONF-2016-012 - PDF; In : 2016 International Conference on Kaon Physics, Birmingham, United Kingdom, 14 - 17 Sep 2016

2016-09-30
15:31
 Search for the rare decays $B^0_{(s)}\to\tau^+\tau^-$ / De Bruyn, Kristof (Centre National de la Recherche Scientifique (FR)) /LHCb Collaboration A search for the rare decays $B^0_{(s)}\to\tau^+\tau^-$ is performed using $pp$ collision data, corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected by the LHCb detector in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV, respectively. The $\tau$ leptons are reconstructed through the hadronic decay $\tau^+\to\pi^+\pi^-\pi^+\overline\nu_{\tau}$. [...] LHCb-CONF-2016-011; CERN-LHCb-CONF-2016-011.- Geneva : CERN, 2016 - 18. Fulltext: PDF; Related data file(s): ZIP;

2016-09-28
12:05
 $CP$-violating asymmetries from the decay-time distribution of prompt $D^0 \to K^+ K^-$ and $D^0 \to \pi^+\pi^-$ decays in the full $\mbox{LHCb}$ Run 1 data sample. Measurement using unbinned, acceptance corrected decay-time. /LHCb Collaboration A study of indirect $CP$ violation in $D^0$ mesons is presented through a measurement of the asymmetry of the effective decay widths of $D^0$ and $\overline{D}^0$ mesons to $CP$ eigenstates. This observable, known as $A_{\Gamma}$, is measured with the $CP$ eigenstates $K^+ K^-$ and $\pi^+ \pi^-$ using data collected in $pp$ collisions by the LHCb experiment in 2012 with an integrated luminosity of $1.9\ \rm fb^{-1}$. [...] LHCb-CONF-2016-010; CERN-LHCb-CONF-2016-010.- Geneva : CERN, 2016 - 13. Fulltext: Figures - ZIP; LHCb-CONF-2016-010 - PDF; In : The 8th International workshop on CHARM physics (CHARM 2016), Bologna, Italy, 5 - 9 Sep 2016

2016-09-28
10:30
 $CP$-violating asymmetries from the decay-time distribution of prompt $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays in the full LHCb Run~1 data sample. Measurement using yield asymmetries in bins of decay time. /LHCb Collaboration Time-dependent $CP$ asymmetries in the decay rates of the singly Cabibbo-suppressed decays $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ are measured in $pp$ collision data at centre-of-mass energies of $7$ and $8\,\mathrm{TeV}$ collected by the LHCb detector, corresponding to an integrated luminosity of $3\,\mathrm{fb}^{-1}$. The strong-interaction decay $D^{*+} \to D^0\pi^+$ is used to infer the flavour of the $D^0$ mesons at production. [...] LHCb-CONF-2016-009; CERN-LHCb-CONF-2016-009.- Geneva : CERN, 2016 - 14. Fulltext: LHCb-CONF-2016-009 - PDF; figs - ZIP; In : The 8th International workshop on CHARM physics (CHARM 2016), Bologna, Italy, 5 - 9 Sep 2016

2016-09-28
10:19
 Pending /LHCb Collaboration Pending LHCb-CONF-2016-008; CERN-LHCb-CONF-2016-008.- Geneva : CERN, 2016

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

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

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

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