# EP Articles

Ostatnio dodane:
2017-02-20
09:47
 Test of an additive diquark spectator model for meson-baryon quasi-two-body reactions / Zralek, M (Nijmegen U.) ; Metzger, W J (Nijmegen U.) ; Van de Walle, R T (Nijmegen U.) ; Dionisi, C (CERN) ; Gurtu, A (CERN) ; Mazzucato, M (CERN) ; Foster, B (Oxford U.) /for the Amsterdam-CERN-Nijmegen-Oxford Collaboration 1978 Fulltext: PDF; In : Meeting on Exotic Resonances, Hiroshima, Japan, 1 - 2 Sep 1978, pp.131

2016-12-16
09:33
 Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions / LHCb Collaboration Measurements of the cross-section for producing $b$ quarks in the reaction $pp \to b\overline{b}X$ are reported in $7$ and $13 TeV$ collisions at the LHC as a function of the pseudorapidity $\eta$ in the range $2<\eta<5$ covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. [...] arXiv:1612.05140; LHCB-PAPER-2016-031; CERN-EP-2016-201.- Geneva : CERN, 2017 - 21 p. - Published in : Phys. Rev. Lett. 118 (2017) 052002 Fulltext: arXiv:1612.05140 - PDF; 10.1103_PhysRevLett.118.052002 - PDF; Related data file(s): ZIP;

2016-11-10
07:44
 Measurement of the CKM angle $\gamma$ from a combination of LHCb results / LHCb collaboration A combination of measurements sensitive to the CKM angle $\gamma$ from LHCb is performed. The inputs are from analyses of time-integrated $B^{+}\rightarrow DK^+$, $B_{d}^{0} \rightarrow D K^{*0}$, $B_{d} \rightarrow D K^+ \pi^-$ and $B^{+} \rightarrow D K^+\pi^+\pi^-$ tree-level decays. [...] arXiv:1611.03076; LHCB-PAPER-2016-032; CERN-EP-2016-270.- Geneva : CERN, 2016 - 58 p. - Published in : J. High Energy Phys. 12 (2016) 087 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;

2016-10-27
08:35
 Measurement of forward $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV / LHCb collaboration The production of $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 $\mbox{fb}^{-1}$. The $W$ bosons are reconstructed in the decays $W\rightarrow\ell\nu$, where $\ell$ denotes muon or electron, while the $b$ and $c$ quarks are reconstructed as jets. [...] arXiv:1610.08142; LHCB-PAPER-2016-038; CERN-EP-2016-232.- Geneva : CERN, 2017 - 20 p. - Published in : Phys. Lett. B 767 (2017) 110-120 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2016-10-18
08:01
 Observation of the decay $B^0_s \to \phi\pi^+\pi^-$ and evidence for $B^0 \to \phi\pi^+\pi^-$ / LHCb collaboration The first observation of the rare decay Bs0→ϕπ+π- and evidence for B0→ϕπ+π- are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3  fb-1. The branching fractions in the π+π- invariant mass range 400

2016-10-13
08:14
 Search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$ / LHCb collaboration A search for the $C\!P$-violating strong decays $\eta \to \pi^+\pi^-$ and $\eta^\prime(958) \to \pi^+\pi^-$ has been performed using approximately $2.5 \times 10^{7}$ events of each of the decays $D^+ \to \pi^+\pi^+\pi^-$ and $D_s^+ \to \pi^+\pi^+\pi^-$, recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collision data recorded during LHC Run 1 and 0.3 fb$^{-1}$ recorded in Run 2. [...] arXiv:1610.03666; LHCB-PAPER-2016-046; CERN-EP-2016-257.- Geneva : CERN, 2017 - 17 p. - Published in : Phys. Lett. B 764 (2017) 233-240 Elsevier Open Access article: PDF; Preprint: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2016-10-06
09:47
 Observation of $B^+\rightarrow J/\psi 3\pi^+ 2\pi^-$ and $B^+\rightarrow \psi(2S) \pi^+\pi^+\pi^-$ decays / LHCb Collaboration The decays $B^+\rightarrow J/\psi 3\pi^+ 2\pi^-$ and $B^+\rightarrow \psi(2S) \pi^+\pi^+\pi^-$ are observed for the first time using a data sample corresponding to an integrated luminosity of $3.0fb^{-1}$, collected by the LHCb experiment in proton-proton collisions at the centre-of-mass energies of 7 and 8 TeV. The branching fractions relative to that of $B^+ \rightarrow \psi(2S)K^+$ are measured to be \begin{eqnarray*} \frac {\mathcal{B}\left( B^+\rightarrow J/\psi 3\pi^+ 2\pi^- \right)} {\mathcal{B}\left( B^+ \rightarrow \psi(2S)K^+ \right)} & = & \left( 1.88\pm0.17\pm0.09\right)\times10^{-2}, \\ \frac {\mathcal{B}\left( B^+\rightarrow \psi(2S) \pi^+\pi^+\pi^- \right)} {\mathcal{B}\left( B^+ \rightarrow \psi(2S)K^+ \right) } & = & \left( 3.04\pm0.50\pm0.26\right)\times10^{-2}, \end{eqnarray*} where the first uncertainties are statistical and the second are systematic.. arXiv:1610.01383; LHCB-PAPER-2016-040; CERN-EP-2016-247.- Geneva : CERN, 2017 - 20 p. - Published in : Eur. Phys. J. C 77 (2017) 72 Fulltext: PDF; Related data file(s): ZIP;

2016-09-19
10:32
 Measurement of matter-antimatter differences in beauty baryon decays / LHCb Collaboration Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as CP violation. [...] arXiv:1609.05216; LHCB-PAPER-2016-030; CERN-EP-2016-212.- Geneva : CERN, 2017 - 19 p. - Published in : Nature Phys. xx (2017) xx Fulltext: PDF; Macmillan Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2016-09-16
07:42
 Differential branching fraction and angular moments analysis of the decay $B^0 \to K^+ \pi^- \mu^+ \mu^-$ in the $K^*_{0,2}(1430)^0$ region / LHCb collaboration Measurements of the differential branching fraction and angular moments of the decay $B^0 \to K^+ \pi^- \mu^+ \mu^-$ in the $K^*_{0,2}(1430)^0$ in the $K^+\pi^-$ invariant mass range $1330 < m (K^+ \pi^-) <1530~ \text{MeV}/c^2$ are presented. Proton-proton collision data are used, corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by the LHCb experiment. [...] arXiv:1609.04736; CERN-EP-2016-215; LHCB-PAPER-2016-025.- Geneva : CERN, 2016 - 25 p. - Published in : J. High Energy Phys. 12 (2016) 065 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;

2016-09-13
09:04
 Search for Higgs-like bosons decaying into long-lived exotic particles / LHCb collaboration A search is presented for massive long-lived particles, in the 20-60 GeV mass range with lifetimes between 5 and 100 ps. The dataset used corresponds to 0.62 1\fb of proton-proton collision data collected by the LHCb detector at sqrt(s)=7 TeV. [...] arXiv:1609.03124; LHCB-PAPER-2016-014; CERN-EP-2016-188.- Geneva : CERN, 2016 - 29 p. - Published in : Eur. Phys. J. C 76 (2016) 664 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;