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CERN Document Server 180 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 0.57 secondes. 
1.
Measurement of $Z\rightarrow\tau^+\tau^-$ production in proton-proton collisions at $\sqrt{s} = 8$ TeV / LHCb Collaboration
A measurement of $Z\rightarrow\tau^+\tau^-$ production cross-section is presented using data, corresponding to an integrated luminosity of 2 fb$^{-1}$, from $pp$ collisions at $\sqrt{s}=8$ TeV collected by the LHCb experiment. The $\tau^+\tau^-$ candidates are reconstructed in final states with the first tau lepton decaying leptonically, and the second decaying either leptonically or to one or three charged hadrons. [...]
arXiv:1806.05008; LHCB-PAPER-2018-016; CERN-EP-2018-147; LHCb-PAPER-2018-016; LHCB-PAPER-2018-016.- Geneva : CERN, 2018-09-27 - 19 p. - Published in : JHEP 09 (2018) 159 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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2.
Amplitude analysis of the decay $\overline{B}^0 \to K_{S}^0 \pi^+ \pi^-$ and first observation of the CP asymmetry in $\overline{B}^0 \to K^{*}(892)^- \pi^+$ / LHCb Collaboration
The time-integrated Dalitz plot of the three-body hadronic charmless decay ${{\overline{B}}^0 \to K_{\mathrm{\scriptscriptstyle S}}^0 \pi^+ \pi^-}$ is studied using a $pp$ collision data sample recorded with the LHCb detector, corresponding to an integrated luminosity of $3.0\;\mathrm{fb}^{-1}$. The decay amplitude is described with an isobar model. [...]
arXiv:1712.09320; LHCB-PAPER-2017-033; CERN-EP-2017-317.- 2018-06-27 - 10 p. - Published in : Phys. Rev. Lett. 120 (2018) 261801 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; External link: Figures, tables and other information
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3.
$CP$ violation in heavy-flavour hadrons / Cowan, Greig A. (Edinburgh U.) /LHCb Collaboration
Measurements of $CP$-violating observables in $B$ meson decays can be used to determine the angles of the Unitarity Triangle and hence probe for manifestations of New Physics beyond the Cabibbo-Kobayashi-Maskawa Standard Model paradigm. Of particular interest are precise measurements of the angles $\gamma$ and $\beta$. [...]
arXiv:1708.08628.- 2020 - 20 p. - Published in : 10.1142/9789811207402_0011 Preprint: PDF;
In : The 28th International Symposium on Lepton-Photon Interactions at High Energies, Guangzhou, Guangdong Sheng, China, 7 - 12 Aug 2017, pp.154-173
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4.
Bose-Einstein correlations of same-sign charged pions in the forward region in $pp$ collisions at $\sqrt{s}$ = 7 TeV / LHCb Collaboration
Bose-Einstein correlations of same-sign charged pions, produced in proton-proton collisions at a 7 TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein correlations is observed in the form of an enhancement of pairs of like-sign charged pions with small four-momentum difference squared. [...]
arXiv:1709.01769; CERN-EP-2017-203; LHCB-PAPER-2017-025; LHCB-PAPER-2017-025.- Geneva : CERN, 2017-12-06 - 24 p. - Published in : JHEP 12 (2017) 025 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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5.
Measurements of $\phi_s$ at the LHCb experiment / Cowan, Greig A. (Edinburgh U.) /LHCb Collaboration
These proceedings present the current status of measurements of the CP-violating phase $phi_s$ by the LHCb collaboration, reviewing the measurements in channels such as $B_s^0\to J/\psi\phi$, $B_s^0\to J/\psi \pi^+\pi^-$ and $B_s^0 \to \psi(2S)\phi$. The observation of the $B_s^0\to\eta_c\phi$ decay mode is presented for the first time, which can be used to measure $\phi_s$ with larger data samples that will be collected over the coming years by the LHCb experiment. [...]
arXiv:1701.08580.- SISSA, 2017-01-30 - 7 p. - Published in : PoS CKM2016 (2017) 084 Fulltext: PDF; External link: PoS server
In : 9th International Workshop on the CKM Unitarity Triangle, Mumbai, India, 28 Nov - 2 Dec 2016, pp.084
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6.
Prompt and nonprompt J/$\psi$ production and nuclear modification in $p$Pb collisions at $\sqrt{s_{\text{NN}}}= 8.16$ TeV / LHCb Collaboration
The production of J/$\psi$ mesons is studied in proton-lead collisions at the centre-of-mass energy per nucleon pair $\sqrt{s_{\text{NN}}}=8.16$ TeV with the LHCb detector at the LHC. The double differential cross-sections of prompt and nonprompt J/$\psi$ production are measured as functions of the J/$\psi$ transverse momentum and rapidity in the nucleon-nucleon centre-of-mass frame. [...]
arXiv:1706.07122; LHCB-PAPER-2017-014; CERN-EP-2017-122; LHCB-PAPER-2017-014; EP-2017-122.- Geneva : CERN, 2017-11-10 - 20 p. - Published in : Phys. Lett. B 774 (2017) 159-178 Article from SCOAP3: PDF; Fulltext: arXiv:1706.07122 - PDF; LHCB-PAPER_2017-014 - PDF; Related data files: ZIP; External link: Figures, tables and other information
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7.
Study of charmonium production in ${b}$-hadron decays and first evidence for the decay ${{{B}} ^0_{{s}}} \!\rightarrow \phi \phi \phi $ / LHCb Collaboration
Using decays to $\phi$-meson pairs, the inclusive production of charmonium states in $b$-hadron decays is studied with $pp$ collision data corresponding to an integrated luminosity of $3.0fb^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting by $B_C\equiv B(b\to CX)\times B(C\to\phi\phi)$ the inclusive branching fraction of a $b$ hadron to a charmonium state $C$ that decays into a pair of $\phi$ mesons, ratios $R^{C1}_{C2}\equiv B_{C1}/B_{C2}$ are determined as $R^{\chi_{c0}}_{\eta_c(1S)}=0.147\pm0.023\pm0.011$, $R^{\chi_{c1}}_{\eta_c (1S)}=0.073\pm0.016\pm0.006$, $R^{\chi_{c2}}_{\eta_c (1S)}=0.081\pm0.013\pm0.005$, $R^{\chi_{c1}}_{\chi_{c0}}=0.50\pm0.11\pm0.01$, $R^{\chi_{c2}}_{\chi_{c0}}=0.56\pm0.10\pm0.01$ and $R^{\eta_c (2S)}_{\eta_c(1S)}=0.040\pm0.011\pm0.004$. [...]
arXiv:1706.07013; LHCB-PAPER-2017-007; CERN-EP-2017-099; LHCB-PAPER-2017-007.- Springer, 2017-09-14 - 32 p. - Published in : Eur. Phys. J. C 77 (2017) 609 Article from SCOAP3: PDF; Fulltext: arXiv:1706.07013 - PDF; Paper-2017-007 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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8.
Test of lepton universality with $B^{0} \rightarrow K^{*0}\ell^{+}\ell^{-}$ decays / LHCb Collaboration
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^{0} \rightarrow K^{*0}\mu^{+}\mu^{-}$ and $B^{0} \rightarrow K^{*0}e^{+}e^{-}$ decays, $R_{K^{*0}}$, is presented. The $K^{*0}$ meson is reconstructed in the final state $K^{+}\pi^{-}$, which is required to have an invariant mass within 100$\mathrm{\,MeV}c^2$ of the known $K^{*}(892)^{0}$ mass. [...]
arXiv:1705.05802; LHCB-PAPER-2017-013; CERN-EP-2017-100; LHCB-PAPER-2017-013.- Geneva : CERN, 2017-08-16 - 31 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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9.
First observation of a baryonic $B_s^0$ decay / LHCb Collaboration
We report the first observation of a baryonic $B_s^0$ decay, $B_s^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} K^-$, using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of $3.0\,\mathrm{fb}^{-1}$. The branching fraction is measured to be $ \mathcal{B}(B_s^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} K^-) + \mathcal{B}(B_s^0 \to \bar{p} \Lambda K^+) = \left[5.46 \pm 0.61 \pm 0.57 \pm 0.50 (\mathcal{B}) \pm 0.32 (f_s/f_d)\right]\times 10^{-6}, $ where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the $B^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} \pi^-$ decay used for normalization, and the fourth uncertainty relates to the knowledge of the ratio of $b$-quark hadronization probabilities $f_s/f_d$..
arXiv:1704.07908; LHCB-PAPER-2017-012; CERN-EP-2017-067.- 2017-07-25 - 10 p. - Published in : Phys. Rev. Lett. 119 (2017) 041802 Fulltext: arXiv:1704.07908 - PDF; 10.1103_PhysRevLett.119.041802 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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10.
Search for long-lived scalar particles in $B^+ \to K^+ \chi (\mu^+\mu^-)$ decays / LHCb Collaboration
A search for a long-lived scalar particle $\chi$ is performed, looking for the decay ${B^+ \to K^+ \chi}$ with ${\chi \to \mu^+\mu^-}$ in $pp$ collision data corresponding to an integrated luminosity of $3\, {\rm fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $\sqrt{s}=7$ and 8$\,$TeV. This new scalar particle, predicted by Hidden Sector models, is assumed to have a narrow width. [...]
arXiv:1612.07818; CERN-EP-2016-302; LHCB-PAPER-2016-052.- 2017-04-14 - 9 p. - Published in : Phys. Rev. D 95 (2017) 071101 APS Open Access article: PDF; Figures: ZIP; Fulltext: arXiv:1612.07818 - PDF; 10.1103_PhysRevD.95.071101 - PDF; Supplementary information: ZIP; External link: Figures, tables and other information
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CERN Document Server : 180 notices trouvées   1 - 10suivantfin  aller vers la notice:
Voir aussi: noms d'auteurs similaires
603 Cowan, G
6 Cowan, G (University of London)
213 Cowan, G A
256 Cowan, G D
1 Cowan, G E
110 Cowan, G.
1 Cowan, G.A
1 Cowan, George S
1461 Cowan, Glen
4 Cowan, Glen (Royal Holloway College U. of London)
2 Cowan, Glen D
4 Cowan, Glen Douglas
416 Cowan, Greig
3 Cowan, Greig A
3 Cowan, Greig A.
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