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CERN Document Server 551 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 1.24 секунд. 
1.
Light isovector resonances in $\pi^- p \to \pi^-\pi^-\pi^+ p$ at 190 GeV/${\it c}$ / COMPASS Collaboration
We have performed the most comprehensive resonance-model fit of $\pi^-\pi^-\pi^+$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction $\pi^- + p \to \pi^-\pi^-\pi^+ + p_\text{recoil}$ with a 190 GeV/$c$ pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, $0.5 < m_{3\pi} < 2.5$ GeV/$c^2$, and simultaneously in 11 bins of the reduced four-momentum transfer squared, $0.1 < t' < 1.0$ $($GeV$/c)^2$, are subjected to a resonance-model fit using Breit-Wigner amplitudes to simultaneously describe a subset of 14 selected waves using 11 isovector light-meson states with $J^{PC} = 0^{-+}$, $1^{++}$, $2^{++}$, $2^{-+}$, $4^{++}$, and spin-exotic $1^{-+}$ quantum numbers. [...]
arXiv:1802.05913; CERN-EP-2018-021.- Geneva : CERN, 2018-11-02 - 72 p. - Published in : Phys. Rev. D 98 (2018) 092003 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-021 - PDF; 1802.05913 - PDF;
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2.
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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3.
New limits on heavy neutrinos from Kaon experiments at CERN / Massri, Karim (CERN)
The NA48/2 and NA62-$R_K$ experiments at CERN collected large samples of charged kaon decays in 2003--2004 and 2007, respectively. These samples, collected with different trigger conditions, allow to search for both short and long-living heavy neutrinos produced in $K^{\pm}\to\mu^{\pm}N_4$ decays. [...]
arXiv:1706.03553.- 2017 - 8 p. - Published in : Nuovo Cimento C 40 (2017) 170 Fulltext: PDF; Preprint: PDF;
In : 31st Rencontres de Physique de La Vallée d'Aoste, La Thuile, Vallée D'aoste, Ita, 5 - 11 Mar 2017, pp.170
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4.
Searches for Light Exotics at LHCb / Redi, Federico (Imperial Coll., London) /LHCb Collaboration
We report on the latest direct searches for light exotics at LHCb, conducted during Run I of LHC. This proceedings are divided into two sections, the first part will cover the search for the lepton number violating decay ${B}\rightarrow {\pi^{+}\mu^{-}\mu^{-}}$ while the second part will cover the search for a low mass dark boson in the decay $B^0 \rightarrow K^{*0}\chi$, with $\chi \rightarrow \mu^+\mu^-$ and $K^{*0} \rightarrow K^+\pi^-$. [...]
arXiv:1703.01637.- 2016 - 8 p. - Published in : (2015) , pp. 115-120 Fulltext: PDF; Preprint: PDF;
In : 3rd Annual Large Hadron Collider Physics Conference, St. Petersburg, Russia, 31 Aug - 5 Sep 2015, pp.115-120
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5.
Recent results from NA48/2 and NA62 experiments at CERN / Lurkin, Nicolas (Birmingham U.)
The NA48/2 and $\text{NA62}\text{-}{\text{R}_\text{K}}$ experiments at the CERN SPS collected a large sample of charged kaon decays in flight. $\text{NA62}\text{-}{\text{R}_\text{K}}$ was running in 2007-08 with a highly efficient minimum bias trigger for decays into electrons. [...]
POS(HQL-2016)033; arXiv:1701.06979.- SISSA, 2016-11-23 - 11 p. - Published in : PoS HQL2016 (2017) 033 Fulltext: PDF; Preprint: PDF;
In : 13th International Conference on Heavy Quarks and Leptons, Blacksburg, Virginia, USA, 22 - 27 May 2016, pp.033
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6.
Amplitude analysis of four-body decays using a massively-parallel fitting framework / Hasse, C. (CERN ; Tech. U., Dortmund (main) ; Cincinnati U.) ; Albrecht, J. (Tech. U., Dortmund (main)) ; Alves, A.A. (Cincinnati U.) ; d'Argent, P. (Heidelberg U.) ; Evans, T.D. (Oxford U.) ; Rademacker, J. (Bristol U.) ; Sokoloff, M.D. (Cincinnati U.)
The GooFit Framework is designed to perform maximum-likelihood fits for arbitrary functions on various parallel back ends, for example a GPU. We present an extension to GooFit which adds the functionality to perform time-dependent amplitude analyses of pseudoscalar mesons decaying into four pseudoscalar final states. [...]
arXiv:1702.06735.- 2017-11-20 - 7 p. - Published in : J. Phys.: Conf. Ser. 898 (2017) 072016 Fulltext: PDF; Fulltext from Publisher: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.072016
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7.
Measurement of the $C\!P$ violation parameter $A_\Gamma$ in $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays / LHCb Collaboration
Asymmetries in the time-dependent rates of $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays are measured in a $pp$ collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of $3\,\mathrm{fb}^{-1}$. The asymmetries in effective decay widths between $D^0$ and $\overline{D}^0$ decays, sensitive to indirect $CP$ violation, are measured to be $A_\Gamma(K^+ K^-) = (-0.30 \pm 0.32 \pm 0.10)\times 10^{-3}$ and $A_\Gamma(\pi^+\pi^-) = (0.46 \pm 0.58 \pm 0.12)\times 10^{-3}$, where the first uncertainty is statistical and the second systematic. [...]
arXiv:1702.06490; LHCB-PAPER-2016-063; CERN-EP-2017-028.- Geneva : CERN, 2017-06-28 - 9 p. - Published in : Phys. Rev. Lett. 118 (2017) 261803 APS Open Access Article: PDF; Fulltext: arXiv:1702.06490 - PDF; 10.1103_PhysRevLett.118.261803 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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8.
Measurement of the $B^{\pm}$ production asymmetry and the $CP$ asymmetry in $B^{\pm} \to J/\psi K^{\pm}$ decays / LHCb Collaboration
The $B^{\pm}$ meson production asymmetry in $pp$ collisions is measured using $B^+ \to \bar{D}^0 \pi^+$ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at centre-of-mass energies of $\sqrt{s}=$ 7 and 8 TeV [...]
arXiv:1701.05501; LHCB-PAPER-2016-054; CERN-EP-2016-325; LHCB-PAPER-2016-054.- Geneva : CERN, 2017-03-22 - 13 p. - Published in : Phys. Rev. D 95 (2017) 052005 APS Open Access article: PDF; Fulltext: arXiv:1701.05501 - PDF; 10.1103_PhysRevD.95.052005 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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9.
Observation of $B_{c}^{+} \rightarrow D^{0} K^{+}$ decays / LHCb Collaboration
Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV, the $B_{c}^{+} \rightarrow D^{0} K^{+}$ decay is observed with a statistical significance of 5.1 standard deviations. By normalising to $B^{+} \rightarrow \bar{D}^{0} \pi^{+}$ decays, a measurement of the branching fraction multiplied by the production rates for $B_{c}^{+}$ relative to $B^{+}$ mesons in the LHCb acceptance is obtained, R_{D^{0} K} = \frac{f_{c}}{f_{u}}\times\mathcal{B}(B_{c}^{+} \rightarrow D^{0} K^{+}) = (9.3\,^{+2.8}_{-2.5} \pm 0.6) \times 10^{-7}\,where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1701.01856; LHCB-PAPER-2016-058; CERN-EP-2016-314; LHCB-PAPER-2016-058.- Geneva : CERN, 2017-03-15 - 9 p. - Published in : Phys. Rev. Lett. 118 (2017) 111803 APS Open Access article: PDF; Fulltext: arXiv:1701.01856 - PDF; 10.1103_PhysRevLett.118.111803 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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10.
Long distance contribution to $K^{+} \to \pi^{+}\nu\overline{\nu}$ at $O(p^{4})$ in ChPT / Geng, C Q ; Hsu, I J ; Wang, C W
1999 - Published in : Prog. Theor. Phys. 101 (1999) 937-946
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