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CERN Document Server Znaleziono 2,051 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.67 sekund. 
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Expression of Interest for the CODEX-b Detector / Aielli, Giulio (INFN, Rome2 ; Rome U., Tor Vergata) ; Ben-Haim, Eli (Paris U., VI-VII) ; Cardarelli, Roberto (INFN, Rome2) ; Charles, Matthew John (Paris U., VI-VII) ; Cid Vidal, Xabier (Santiago de Compostela U., IGFAE) ; Coco, Victor (CERN) ; Dey, Biplab (CCNU, Wuhan, Inst. Part. Phys.) ; Dumps, Raphael (CERN) ; Evans, Jared A. (Cincinnati U.) ; Gibbons, George (Birmingham U.) et al.
This document presents the physics case and ancillary studies for the proposed CODEX-b long-lived particle (LLP) detector, as well as for a smaller proof-of-concept demonstrator detector, CODEX-$\beta$, to be operated during Run 3 of the LHC. Our development of the CODEX-b physics case synthesizes `top-down' and `bottom-up' theoretical approaches, providing a detailed survey of both minimal and complete models featuring LLPs. [...]
arXiv:1911.00481.- 2020-12-21 - 47 p. - Published in : Eur. Phys. J. C 80 (2020) 1177 Article from SCOAP3: PDF; Fulltext: PDF;
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The Road Ahead for CODEX-b / Aielli, Giulio (Rome U., Tor Vergata) ; Alimena, Juliette (CERN) ; Beacham, James (Duke U.) ; Ben-Haim, Eli (Paris U., VI-VII) ; Borsato, Martino (Kirchhoff Inst. Phys.) ; Charles, Matthew John (Paris U., VI-VII) ; Vidal, Xabier Cid (Santiago de Compostela U., IGFAE) ; Coco, Victor (CERN) ; De Roeck, Albert (CERN) ; Dey, Biplab (Eotvos Lorand U., Budapest, Inst. Theor. Phys.) et al.
In this Snowmass contribution we present a comprehensive status update on the progress and plans for the proposed CODEX-b detector, intended to search for long-lived particles beyond the Standard Model. [...]
arXiv:2203.07316. - 13 p.
eConf - Fulltext
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Technical design report for the CODEX-$\beta$ demonstrator / CODEX-b Collaboration
The CODEX-$\beta$ apparatus is a demonstrator for the proposed future CODEX-b experiment, a long-lived-particle detector foreseen for operation at IP8 during HL-LHC data-taking. [...]
arXiv:2406.12880. - 51 p.
Fulltext
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First measurement of the $C\!P$-violating phase in ${{B} ^0_{s}} \!\rightarrow {{J /\psi }} (\rightarrow e ^+e ^-$)$\phi $ decays / LHCb Collaboration
A flavour-tagged time-dependent angular analysis of $B^0_s\to J/\psi\phi$ decays is presented where the $J/\psi$ meson is reconstructed through its decay to an $e^+e^-$ pair. The analysis uses a sample of $pp$ collision data recorded with the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV, corresponding to an integrated luminosity of $3$ fb$^{-1}$. [...]
arXiv:2105.14738; LHCb-PAPER-2020-042; CERN-EP-2021-064; LHCB-PAPER-2020-042.- Geneva : CERN, 2021-11-24 - 28 p. - Published in : Eur. Phys. J. C 81 (2021) 1026 Fulltext: document - PDF; LHCb-PAPER-2020-042 - PDF; 2105.14738 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Allen : A high level trigger on GPUs for LHCb / Aaij, Roel (Nikhef, Amsterdam) ; Albrecht, Johannes (Tech. U., Dortmund (main)) ; Billoir, Pierre (Paris U., VI-VII) ; Boettcher, Thomas (MIT) ; Brea Rodriguez, Alexandre (U. Santiago de Compostela (main)) ; Vom Bruch, Dorothea (Paris U., VI-VII) ; Campora Perez, Daniel Hugo (NIKHEF, Amsterdam) ; Casais Vidal, Adrian (U. Santiago de Compostela (main)) ; Craik, Daniel Charles (MIT) ; Fernandez Declara, Placido (CERN) et al.
We describe a fully GPU-based implementation of the first level trigger for the upgrade of the LHCb detector, due to start data taking in 2021. We demonstrate that our implementation, named Allen, can process the 40 Tbit/s data rate of the upgraded LHCb detector and perform a wide variety of pattern recognition tasks. [...]
arXiv:1912.09161.- 2020-04-30 - 11 p. - Published in : Comput. Softw. Big Sci. 4 (2020) 7 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
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Study of the doubly charmed tetraquark $T_{cc}^{+}$ / LHCb Collaboration
An exotic narrow state in the $D^0D^0\pi^+$ mass spectrum just below the $D^{*+}D^0$ mass threshold is studied using a data set corresponding to an integrated luminosity of 9fb$^{-1}$ acquired with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13TeV. The state is consistent with the ground isoscalar $T^+_{cc}$ tetraquark with a quark content of $cc\bar{u}\bar{d}$ and spin-parity quantum numbers $\mathrm{J}^{\mathrm{P}}=1^+$. [...]
arXiv:2109.01056; CERN-EP-2021-169; LHCb-PAPER-2021-032; LHCB-PAPER-2021-032.- Geneva : CERN, 2022-06-16 - 60 p. - Published in : Nature Commun. 13 (2022) 3351 Fulltext: document - PDF; 2109.01056 - PDF; LHCb-PAPER-2021-032 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Observation of an exotic narrow doubly charmed tetraquark / LHCb Collaboration
Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. The observation of a new type of hadronic state, a doubly charmed tetraquark containing two charm quarks, an anti-$u$ and an anti-$d$ quark, is reported using data collected by the LHCb experiment at the Large Hadron Collider. [...]
arXiv:2109.01038; CERN-EP-2021-165; LHCb-PAPER-2021-031; LHCB-PAPER-2021-031.- Geneva : CERN, 2022-06-16 - 24 p. - Published in : 10.1038/s41567-022-01614-y Fulltext: 2109.01038 - PDF; document - PDF; Related data file(s): ZIP;
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Observation of new excited ${B} ^0_{s} $ states / LHCb Collaboration
A structure is observed in the $B^+K^-$ mass spectrum in a sample of proton--proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of 9 fb${}^-1$. The structure is interpreted as the result of overlapping excited $B_s^0$ states. [...]
arXiv:2010.15931; LHCb-PAPER-2020-026; CERN-EP-2020-185; LHCB-PAPER-2020-026.- Geneva : CERN, 2021-07-12 - 17 p. - Published in : Eur. Phys. J. C 81 (2021) 601 Fulltext: LHCb-PAPER-2020-026 - PDF; document - PDF; 2010.15931 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Search for the doubly charmed baryon ${\it{\Omega}_{cc}^{+}}$ / LHCb Collaboration
A search for the doubly charmed baryon $\it{\Omega}_{cc}^{+}$ with the decay mode $\it{\Omega}_{cc}^{+}\to\it{\Xi}_c^{+}K^{-}\pi^{+}$ is performed using proton-proton collision data at a centre-of-mass energy of 13$\mathrm{\,Te\kern -0.1em V}$ collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of $5.4\,\mathrm{fb}^{-1}$. No significant signal is observed within the invariant mass range of 3.6 to 4.0$\mathrm{\,Ge\kern -0.1em V}/c^2$. [...]
arXiv:2105.06841; LHCb-PAPER-2021-011; CERN-EP-2021-068; LHCB-PAPER-2021-011.- 2021-08-31 - 12 p. - Published in : Sci. China Phys. Mech. Astron. 64 (2021) 101062 Fulltext: document - PDF; 2105.06841 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Test of lepton universality in beauty-quark decays / LHCb Collaboration
The Standard Model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction strengths. [...]
arXiv:2103.11769; LHCb-PAPER-2021-004; CERN-EP-2021-042.- Geneva : CERN, 2022-03-15 - 25 p. - Published in : Nature Phys. Fulltext: LHCb-PAPER-2021-004 - PDF; Addendum - PDF; Publication - PDF; 2103.11769 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External links: CERN News article; LHCb News article; Interactions.org article; BBC News article; Scientific American article
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