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CERN Document Server 65 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.79 sekunder. 
1.
Model dependence of the $\pi_1(1600)\to\rho(770)\pi$ signal / Krinner, Fabian (Munich, Max Planck Inst.) /COMPASS Collaboration
Using the large C OMPASS data set on diffractive three pion production, we investigate the contradictory observations reported by previous experiments on the existence of a resonance signal in the spin-exotic wave with spin, parity and charge conjugation quantum numbers 1−+ . We identify a strong dependence of the result on the employed analysis model as the cause and derive a model tuned to minimize these effects. [...]
2022 - 6 p. - Published in : Rev. Mex. Fis. Suppl. 3 (2022) 0308015 Fulltext: PDF;
In : XIX International Conference on Hadron Spectroscopy and Structure (Hadron 2021), Mexico City, Mexico, 26 Jul - 1 Aug 2021, pp.0308015
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2.
Analysis of the diffractively produced $\pi^- \pi^- \pi^+$ final state at COMPASS / Kaspar, Florian Markus (Munich, Tech. U.) ; Gerassimov, Sergei (Munich, Tech. U.) /COMPASS Collaboration
The COMPASS experiment at CERN collected a large sample of diffractively produced $π ^−π^ −π^ +$ events. The data contain contributions from light-meson resonances with the quantum numbers of πJ - and aJ -like states. [...]
2022 - 5 p. - Published in : Rev. Mex. Fis. Suppl. 3 (2022) 0308020 Fulltext: PDF;
In : XIX International Conference on Hadron Spectroscopy and Structure (Hadron 2021), Mexico City, Mexico, 26 Jul - 1 Aug 2021, pp.0308020
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3.
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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4.
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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5.
Observation of the $B^+ \to D^{*-}K^+\pi^+$ decay / LHCb Collaboration
The $B^+ \to D^{*-}K^+\pi^+$ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of $3~{\rm fb}^{-1}$. [...]
arXiv:1704.07581; CERN-EP-2017-064; LHCB-PAPER-2017-006.- Geneva : CERN, 2017-07-19 - 10 p. - Published in : Phys. Rev. D 96 (2017) 011101 Fulltext: arXiv:1704.07581 - PDF; 10.1103_PhysRevD.96.011101 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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6.
$D_{sJ}^{(*)}$ Spectroscopy at LHCb / Ravina, Baptiste (CERN)
I report on my activities at CERN during the course of my Summer Studentship. [...]
CERN-STUDENTS-Note-2015-167. - 2015
Access to fulltext
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7.
Resonance Production and $\pi\pi$ S-wave in $\pi^- + p \rightarrow \pi^- \pi^- \pi^+ + p_{recoil}$ at 190 GeV/c / COMPASS collaboration
The COMPASS collaboration has collected the currently largest data set on diffractively produced $\pi^-\pi^-\pi^+$ final states using a negative pion beam of 190 GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, $0.5 < m_{3\pi} < 2.5$ GeV/c$^2$ , and in 11 bins of the reduced four-momentum transfer squared, $0.1 < t < 1.0$ (GeV/c)$^2$ . [...]
arXiv:1509.00992; CERN-PH-EP-2015-233.- Geneva : CERN, 2017-02-16 - 59 p. - Published in : Phys. Rev. D 95 (2017) 032004 APS Open Access article: PDF; Draft (restricted): PDF; Fulltext: arXiv:1509.00992 - PDF; 10.1103_PhysRevD.95.032004 - PDF; External link: Preprint
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8.
Observation of a new narrow axial-vector meson $a_1(1420)$ / COMPASS collaboration
The COMPASS collaboration at CERN has measured diffractive dissociation of 190 GeV$/c$ pions into the $\pi^-\pi^-\pi^+$ final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of $3\pi$ mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88~waves. [...]
arXiv:1501.05732; CERN-PH-EP-2015-015; CERN-PH-EP-2015-015.- Geneva : CERN, 2015-08-19 - 6 p. - Published in : Phys. Rev. Lett. 115 (2015) 082001 APS Open Access article: PDF; Draft (restricted): PDF; Fulltext: CERN-PH-EP-2015-015 - PDF; arXiv:1501.05732 - PDF; External link: Preprint
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9.
Studies of $B_c$-meson with the ATLAS experiment / Turchikhin, Semen (M.V.Lomonosov Moscow State University)
Slides for QWG2014 conference..
ATL-PHYS-SLIDE-2014-817.- Geneva : CERN, 2014 - 10 p. Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 10th International Workshop on Heavy Quarkonium, CERN, Geneva, Switzerland, 10 - 14 Nov 2014
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10.
Recent ATLAS results in the field of meson physics / Wang, R (New Mexico U.)
Recent results on flavor physics are presented, using data from the ATLAS detector. [...]
ATL-PHYS-PROC-2014-150. - 2014. - 6 p.
Original Communication (restricted to ATLAS) - Full text - Full text
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